# Additional stuff for the LaTeX preamble.
'preamble': '''
- \\usepackage{ifthen}
+ % Use some font with UTF-8 support with XeLaTeX
+ \\usepackage{fontspec}
+ \\setsansfont{DejaVu Serif}
+ \\setromanfont{DejaVu Sans}
+ \\setmonofont{DejaVu Sans Mono}
+
+ '''
+}
+
+# Fix reference escape troubles with Sphinx 1.4.x
+if major == 1 and minor > 3:
+ latex_elements['preamble'] += '\\renewcommand*{\\DUrole}[2]{ #2 }\n'
+
+if major == 1 and minor <= 4:
+ latex_elements['preamble'] += '\\usepackage[margin=0.5in, top=1in, bottom=1in]{geometry}'
+elif major == 1 and (minor > 5 or (minor == 5 and patch >= 3)):
+ latex_elements['sphinxsetup'] = 'hmargin=0.5in, vmargin=1in'
+ latex_elements['preamble'] += '\\fvset{fontsize=auto}\n'
- % Allow generate some pages in landscape
- \\usepackage{lscape}
+# Customize notice background colors on Sphinx < 1.6:
+if major == 1 and minor < 6:
+ latex_elements['preamble'] += '''
+ \\usepackage{ifthen}
% Put notes in color and let them be inside a table
\\definecolor{NoteColor}{RGB}{204,255,255}
}
\\makeatother
- % Use some font with UTF-8 support with XeLaTeX
- \\usepackage{fontspec}
- \\setsansfont{DejaVu Serif}
- \\setromanfont{DejaVu Sans}
- \\setmonofont{DejaVu Sans Mono}
-
- % To allow adjusting table sizes
- \\usepackage{adjustbox}
-
'''
-}
-
-# Fix reference escape troubles with Sphinx 1.4.x
-if major == 1 and minor > 3:
- latex_elements['preamble'] += '\\renewcommand*{\\DUrole}[2]{ #2 }\n'
-if major == 1 and minor <= 4:
- latex_elements['preamble'] += '\\usepackage[margin=0.5in, top=1in, bottom=1in]{geometry}'
-elif major == 1 and (minor > 5 or (minor == 5 and patch >= 3)):
- latex_elements['sphinxsetup'] = 'hmargin=0.5in, vmargin=1in'
- latex_elements['preamble'] += '\\fvset{fontsize=auto}\n'
+# With Sphinx 1.6, it is possible to change the Bg color directly
+# by using:
+# \definecolor{sphinxnoteBgColor}{RGB}{204,255,255}
+# \definecolor{sphinxwarningBgColor}{RGB}{255,204,204}
+# \definecolor{sphinxattentionBgColor}{RGB}{255,255,204}
+# \definecolor{sphinximportantBgColor}{RGB}{192,255,204}
+#
+# However, it require to use sphinx heavy box with:
+#
+# \renewenvironment{sphinxlightbox} {%
+# \\begin{sphinxheavybox}
+# }
+# \\end{sphinxheavybox}
+# }
+#
+# Unfortunately, the implementation is buggy: if a note is inside a
+# table, it isn't displayed well. So, for now, let's use boring
+# black and white notes.
# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
Required Properties:
-- compatible: should be "amlogic,gxbb-aoclkc"
-- reg: physical base address of the clock controller and length of memory
- mapped region.
+- compatible: value should be different for each SoC family as :
+ - GXBB (S905) : "amlogic,meson-gxbb-aoclkc"
+ - GXL (S905X, S905D) : "amlogic,meson-gxl-aoclkc"
+ - GXM (S912) : "amlogic,meson-gxm-aoclkc"
+ followed by the common "amlogic,meson-gx-aoclkc"
- #clock-cells: should be 1.
preprocessor macros in the dt-bindings/reset/gxbb-aoclkc.h header and can be
used in device tree sources.
+Parent node should have the following properties :
+- compatible: "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd"
+- reg: base address and size of the AO system control register space.
+
Example: AO Clock controller node:
- clkc_AO: clock-controller@040 {
- compatible = "amlogic,gxbb-aoclkc";
- reg = <0x0 0x040 0x0 0x4>;
+ao_sysctrl: sys-ctrl@0 {
+ compatible = "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd";
+ reg = <0x0 0x0 0x0 0x100>;
+
+ clkc_AO: clock-controller {
+ compatible = "amlogic,meson-gxbb-aoclkc", "amlogic,meson-gx-aoclkc";
#clock-cells = <1>;
#reset-cells = <1>;
};
+};
Example: UART controller node that consumes the clock and reset generated
by the clock controller:
"atmel,sama5d2-clk-generated":
at91 generated clock
+ "atmel,sama5d2-clk-audio-pll-frac":
+ at91 audio fractional pll
+
+ "atmel,sama5d2-clk-audio-pll-pad":
+ at91 audio pll CLK_AUDIO output pin
+
+ "atmel,sama5d2-clk-audio-pll-pmc"
+ at91 audio pll output on AUDIOPLLCLK that feeds the PMC
+ and can be used by peripheral clock or generic clock
+
Required properties for SCKC node:
- reg : defines the IO memory reserved for the SCKC.
- #size-cells : shall be 0 (reg is used to encode clk id).
-Binding for IDT VersaClock5 programmable i2c clock generator.
+Binding for IDT VersaClock 5,6 programmable i2c clock generators.
-The IDT VersaClock5 are programmable i2c clock generators providing
-from 3 to 12 output clocks.
+The IDT VersaClock 5 and VersaClock 6 are programmable i2c clock
+generators providing from 3 to 12 output clocks.
==I2C device node==
Required properties:
-- compatible: shall be one of "idt,5p49v5923" , "idt,5p49v5933" ,
- "idt,5p49v5935".
+- compatible: shall be one of
+ "idt,5p49v5923"
+ "idt,5p49v5925"
+ "idt,5p49v5933"
+ "idt,5p49v5935"
+ "idt,5p49v6901"
- reg: i2c device address, shall be 0x68 or 0x6a.
- #clock-cells: from common clock binding; shall be set to 1.
- clocks: from common clock binding; list of parent clock handles,
- - 5p49v5923: (required) either or both of XTAL or CLKIN
+ - 5p49v5923 and
+ 5p49v5925 and
+ 5p49v6901: (required) either or both of XTAL or CLKIN
reference clock.
- 5p49v5933 and
- 5p49v5935: (optional) property not present (internal
Xtal used) or CLKIN reference
clock.
- clock-names: from common clock binding; clock input names, can be
- - 5p49v5923: (required) either or both of "xin", "clkin".
+ - 5p49v5923 and
+ 5p49v5925 and
+ 5p49v6901: (required) either or both of "xin", "clkin".
- 5p49v5933 and
- 5p49v5935: (optional) property not present or "clkin".
1 -- OUT1
2 -- OUT4
+5P49V5925 and
5P49V5935:
0 -- OUT0_SEL_I2CB
1 -- OUT1
3 -- OUT3
4 -- OUT4
+5P49V6901:
+ 0 -- OUT0_SEL_I2CB
+ 1 -- OUT1
+ 2 -- OUT2
+ 3 -- OUT3
+ 4 -- OUT4
+
==Example==
/* 25MHz reference crystal */
- "renesas,r8a7794-cpg-mssr" for the r8a7794 SoC (R-Car E2)
- "renesas,r8a7795-cpg-mssr" for the r8a7795 SoC (R-Car H3)
- "renesas,r8a7796-cpg-mssr" for the r8a7796 SoC (R-Car M3-W)
+ - "renesas,r8a77995-cpg-mssr" for the r8a77995 SoC (R-Car D3)
- reg: Base address and length of the memory resource used by the CPG/MSSR
block
clock-names
- clock-names: List of external parent clock names. Valid names are:
- "extal" (r8a7743, r8a7745, r8a7790, r8a7791, r8a7792, r8a7793, r8a7794,
- r8a7795, r8a7796)
+ r8a7795, r8a7796, r8a77995)
- "extalr" (r8a7795, r8a7796)
- "usb_extal" (r8a7743, r8a7745, r8a7790, r8a7791, r8a7793, r8a7794)
--- /dev/null
+* Renesas R-Car USB 2.0 clock selector
+
+This file provides information on what the device node for the R-Car USB 2.0
+clock selector.
+
+If you connect an external clock to the USB_EXTAL pin only, you should set
+the clock rate to "usb_extal" node only.
+If you connect an oscillator to both the USB_XTAL and USB_EXTAL, this module
+is not needed because this is default setting. (Of course, you can set the
+clock rates to both "usb_extal" and "usb_xtal" nodes.
+
+Case 1: An external clock connects to R-Car SoC
+ +----------+ +--- R-Car ---------------------+
+ |External |---|USB_EXTAL ---> all usb channels|
+ |clock | |USB_XTAL |
+ +----------+ +-------------------------------+
+In this case, we need this driver with "usb_extal" clock.
+
+Case 2: An oscillator connects to R-Car SoC
+ +----------+ +--- R-Car ---------------------+
+ |Oscillator|---|USB_EXTAL -+-> all usb channels|
+ | |---|USB_XTAL --+ |
+ +----------+ +-------------------------------+
+In this case, we don't need this selector.
+
+Required properties:
+- compatible: "renesas,r8a7795-rcar-usb2-clock-sel" if the device is a part of
+ an R8A7795 SoC.
+ "renesas,r8a7796-rcar-usb2-clock-sel" if the device if a part of
+ an R8A7796 SoC.
+ "renesas,rcar-gen3-usb2-clock-sel" for a generic R-Car Gen3
+ compatible device.
+
+ When compatible with the generic version, nodes must list the
+ SoC-specific version corresponding to the platform first
+ followed by the generic version.
+
+- reg: offset and length of the USB 2.0 clock selector register block.
+- clocks: A list of phandles and specifier pairs.
+- clock-names: Name of the clocks.
+ - The functional clock must be "ehci_ohci"
+ - The USB_EXTAL clock pin must be "usb_extal"
+ - The USB_XTAL clock pin must be "usb_xtal"
+- #clock-cells: Must be 0
+
+Example (R-Car H3):
+
+ usb2_clksel: clock-controller@e6590630 {
+ compatible = "renesas,r8a77950-rcar-usb2-clock-sel",
+ "renesas,rcar-gen3-usb2-clock-sel";
+ reg = <0 0xe6590630 0 0x02>;
+ clocks = <&cpg CPG_MOD 703>, <&usb_extal>, <&usb_xtal>;
+ clock-names = "ehci_ohci", "usb_extal", "usb_xtal";
+ #clock-cells = <0>;
+ };
-* Rockchip RK3128 Clock and Reset Unit
+* Rockchip RK3126/RK3128 Clock and Reset Unit
-The RK3128 clock controller generates and supplies clock to various
+The RK3126/RK3128 clock controller generates and supplies clock to various
controllers within the SoC and also implements a reset controller for SoC
peripherals.
Required Properties:
-- compatible: should be "rockchip,rk3128-cru"
+- compatible: should be "rockchip,rk3126-cru" or "rockchip,rk3128-cru"
+ "rockchip,rk3126-cru" - controller compatible with RK3126 SoC.
+ "rockchip,rk3128-cru" - controller compatible with RK3128 SoC.
- reg: physical base address of the controller and length of memory mapped
region.
- #clock-cells: should be 1.
--- /dev/null
+Binding for the HSDK Generic PLL clock
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible: should be "snps,hsdk-<name>-pll-clock"
+ "snps,hsdk-core-pll-clock"
+ "snps,hsdk-gp-pll-clock"
+ "snps,hsdk-hdmi-pll-clock"
+- reg : should contain base register location and length.
+- clocks: shall be the input parent clock phandle for the PLL.
+- #clock-cells: from common clock binding; Should always be set to 0.
+
+Example:
+ input_clk: input-clk {
+ clock-frequency = <33333333>;
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ };
+
+ cpu_clk: cpu-clk@0 {
+ compatible = "snps,hsdk-core-pll-clock";
+ reg = <0x00 0x10>;
+ #clock-cells = <0>;
+ clocks = <&input_clk>;
+ };
--- /dev/null
+Binding for the AXS10X Generic PLL clock
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible: should be "snps,axs10x-<name>-pll-clock"
+ "snps,axs10x-arc-pll-clock"
+ "snps,axs10x-pgu-pll-clock"
+- reg: should always contain 2 pairs address - length: first for PLL config
+registers and second for corresponding LOCK CGU register.
+- clocks: shall be the input parent clock phandle for the PLL.
+- #clock-cells: from common clock binding; Should always be set to 0.
+
+Example:
+ input-clk: input-clk {
+ clock-frequency = <33333333>;
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ };
+
+ core-clk: core-clk@80 {
+ compatible = "snps,axs10x-arc-pll-clock";
+ reg = <0x80 0x10>, <0x100 0x10>;
+ #clock-cells = <0>;
+ clocks = <&input-clk>;
+ };
--- /dev/null
+STMicroelectronics STM32H7 Reset and Clock Controller
+=====================================================
+
+The RCC IP is both a reset and a clock controller.
+
+Please refer to clock-bindings.txt for common clock controller binding usage.
+Please also refer to reset.txt for common reset controller binding usage.
+
+Required properties:
+- compatible: Should be:
+ "st,stm32h743-rcc"
+
+- reg: should be register base and length as documented in the
+ datasheet
+
+- #reset-cells: 1, see below
+
+- #clock-cells : from common clock binding; shall be set to 1
+
+- clocks: External oscillator clock phandle
+ - high speed external clock signal (HSE)
+ - low speed external clock signal (LSE)
+ - external I2S clock (I2S_CKIN)
+
+Optional properties:
+- st,syscfg: phandle for pwrcfg, mandatory to disable/enable backup domain
+ write protection (RTC clock).
+
+Example:
+
+ rcc: reset-clock-controller@58024400 {
+ compatible = "st,stm32h743-rcc", "st,stm32-rcc";
+ reg = <0x58024400 0x400>;
+ #reset-cells = <1>;
+ #clock-cells = <2>;
+ clocks = <&clk_hse>, <&clk_lse>, <&clk_i2s_ckin>;
+
+ st,syscfg = <&pwrcfg>;
+};
+
+The peripheral clock consumer should specify the desired clock by
+having the clock ID in its "clocks" phandle cell.
+
+Example:
+
+ timer5: timer@40000c00 {
+ compatible = "st,stm32-timer";
+ reg = <0x40000c00 0x400>;
+ interrupts = <50>;
+ clocks = <&rcc TIM5_CK>;
+ };
+
+Specifying softreset control of devices
+=======================================
+
+Device nodes should specify the reset channel required in their "resets"
+property, containing a phandle to the reset device node and an index specifying
+which channel to use.
+The index is the bit number within the RCC registers bank, starting from RCC
+base address.
+It is calculated as: index = register_offset / 4 * 32 + bit_offset.
+Where bit_offset is the bit offset within the register.
+
+For example, for CRC reset:
+ crc = AHB4RSTR_offset / 4 * 32 + CRCRST_bit_offset = 0x88 / 4 * 32 + 19 = 1107
+
+Example:
+
+ timer2 {
+ resets = <&rcc STM32H7_APB1L_RESET(TIM2)>;
+ };
Required properties :
- compatible: must contain one of the following compatibles:
+ - "allwinner,sun4i-a10-ccu"
+ - "allwinner,sun5i-a10s-ccu"
+ - "allwinner,sun5i-a13-ccu"
- "allwinner,sun6i-a31-ccu"
+ - "allwinner,sun7i-a20-ccu"
- "allwinner,sun8i-a23-ccu"
- "allwinner,sun8i-a33-ccu"
- "allwinner,sun8i-a83t-ccu"
- "allwinner,sun8i-a83t-r-ccu"
- "allwinner,sun8i-h3-ccu"
- "allwinner,sun8i-h3-r-ccu"
++ - "allwinner,sun8i-r40-ccu"
- "allwinner,sun8i-v3s-ccu"
- "allwinner,sun9i-a80-ccu"
- "allwinner,sun50i-a64-ccu"
- "allwinner,sun50i-a64-r-ccu"
- "allwinner,sun50i-h5-ccu"
+ - "nextthing,gr8-ccu"
- reg: Must contain the registers base address and length
- clocks: phandle to the oscillators feeding the CCU. Two are needed:
Required properties:
- compatible: should be one of the following:
- "socionext,uniphier-sld3-clock" - for sLD3 SoC.
"socionext,uniphier-ld4-clock" - for LD4 SoC.
"socionext,uniphier-pro4-clock" - for Pro4 SoC.
"socionext,uniphier-sld8-clock" - for sLD8 SoC.
"socionext,uniphier-pxs2-clock" - for PXs2/LD6b SoC.
"socionext,uniphier-ld11-clock" - for LD11 SoC.
"socionext,uniphier-ld20-clock" - for LD20 SoC.
+ "socionext,uniphier-pxs3-clock" - for PXs3 SoC
- #clock-cells: should be 1.
Example:
Required properties:
- compatible: should be one of the following:
- "socionext,uniphier-sld3-mio-clock" - for sLD3 SoC.
"socionext,uniphier-ld4-mio-clock" - for LD4 SoC.
"socionext,uniphier-pro4-mio-clock" - for Pro4 SoC.
"socionext,uniphier-sld8-mio-clock" - for sLD8 SoC.
"socionext,uniphier-pxs2-sd-clock" - for PXs2/LD6b SoC.
"socionext,uniphier-ld11-mio-clock" - for LD11 SoC.
"socionext,uniphier-ld20-sd-clock" - for LD20 SoC.
+ "socionext,uniphier-pxs3-sd-clock" - for PXs3 SoC
- #clock-cells: should be 1.
Example:
8: USB2 ch0 host
9: USB2 ch1 host
10: USB2 ch2 host
-11: USB2 ch3 host
12: USB2 ch0 PHY
13: USB2 ch1 PHY
14: USB2 ch2 PHY
-15: USB2 ch3 PHY
Peripheral clock
Required properties:
- compatible: should be one of the following:
- "socionext,uniphier-sld3-peri-clock" - for sLD3 SoC.
"socionext,uniphier-ld4-peri-clock" - for LD4 SoC.
"socionext,uniphier-pro4-peri-clock" - for Pro4 SoC.
"socionext,uniphier-sld8-peri-clock" - for sLD8 SoC.
"socionext,uniphier-pxs2-peri-clock" - for PXs2/LD6b SoC.
"socionext,uniphier-ld11-peri-clock" - for LD11 SoC.
"socionext,uniphier-ld20-peri-clock" - for LD20 SoC.
+ "socionext,uniphier-pxs3-peri-clock" - for PXs3 SoC
- #clock-cells: should be 1.
Example:
1. "enable-sdio-wakeup" Documentation/devicetree/bindings/mmc/mmc.txt
2. "gpio-key,wakeup" Documentation/devicetree/bindings/input/gpio-keys{,-polled}.txt
3. "has-tpo" Documentation/devicetree/bindings/rtc/rtc-opal.txt
-4. "isil,irq2-can-wakeup-machine" Documentation/devicetree/bindings/rtc/isil,isl12057.txt
-5. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt
+4. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt
Documentation/devicetree/bindings/mfd/tc3589x.txt
Documentation/devicetree/bindings/input/ads7846.txt
-6. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt
-7. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt
-8. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
+5. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt
+6. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt
+7. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
Examples
--------
--- /dev/null
+Android Goldfish RTC
+
+Android Goldfish RTC device used by Android emulator.
+
+Required properties:
+
+- compatible : should contain "google,goldfish-rtc"
+- reg : <registers mapping>
+- interrupts : <interrupt mapping>
+
+Example:
+
+ goldfish_timer@9020000 {
+ compatible = "google,goldfish-rtc";
+ reg = <0x9020000 0x1000>;
+ interrupts = <0x3>;
+ };
- "wakeup-source": mark the chip as a wakeup source, independently of
the availability of an IRQ line connected to the SoC.
- (Legacy property supported: "isil,irq2-can-wakeup-machine")
- "interrupt-parent", "interrupts": for passing the interrupt line
of the SoC connected to IRQ#2 of the RTC chip.
--- /dev/null
+Realtek RTD129x Real-Time Clock
+===============================
+
+Required properties:
+- compatible : Should be "realtek,rtd1295-rtc"
+- reg : Specifies the physical base address and size
+- clocks : Specifies the clock gate
+
+
+Example:
+
+ rtc@9801b600 {
+ compatible = "realtek,rtd1295-clk";
+ reg = <0x9801b600 0x100>;
+ clocks = <&clkc RTD1295_CLK_EN_MISC_RTC>;
+ };
Required properties for new device trees
- clocks : phandle to the 32kHz external oscillator
-- clock-output-names : name of the LOSC clock created
+- clock-output-names : names of the LOSC and its external output clocks created
- #clock-cells : must be equals to 1. The RTC provides two clocks: the
LOSC and its external output, with index 0 and 1
respectively.
compatible = "allwinner,sun6i-a31-rtc";
reg = <0x01f00000 0x54>;
interrupts = <0 40 4>, <0 41 4>;
- clock-output-names = "osc32k";
+ clock-output-names = "osc32k", "osc32k-out";
clocks = <&ext_osc32k>;
#clock-cells = <1>;
};
Must be "tx".
- clock-names
Tuple listing input clock names.
- Required elements: "pclk", "gclk" and "aclk".
+ Required elements: "pclk" and "gclk".
- clocks
Please refer to clock-bindings.txt.
- assigned-clocks
Should be <&classd_gclk>.
-- assigned-clock-parents
- Should be <&audio_pll_pmc>.
Optional properties:
- pinctrl-names, pinctrl-0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(47))>;
dma-names = "tx";
- clocks = <&classd_clk>, <&classd_gclk>, <&audio_pll_pmc>;
- clock-names = "pclk", "gclk", "aclk";
+ clocks = <&classd_clk>, <&classd_gclk>;
+ clock-names = "pclk", "gclk";
assigned-clocks = <&classd_gclk>;
- assigned-clock-parents = <&audio_pll_pmc>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_classd_default>;
struct vfsmount *(*d_automount)(struct path *path);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
- unsigned int);
+ unsigned int, unsigned int);
locking rules:
rename_lock ->d_lock may block rcu-walk
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
- unsigned int);
+ unsigned int, unsigned int);
};
d_revalidate: called when the VFS needs to revalidate a dentry. This
즉, ACQUIRE 는 최소한의 "취득" 동작처럼, 그리고 RELEASE 는 최소한의 "공개"
처럼 동작한다는 의미입니다.
-core-api/atomic_ops.rst 에서 설명되는 어토믹 오퍼레이션들 중에는 완전히
-순서잡힌 것들과 (배리어를 사용하지 않는) 완화된 순서의 것들 외에 ACQUIRE 와
-RELEASE 부류의 것들도 존재합니다. 로드와 스토어를 모두 수행하는 조합된 어토믹
-오퍼레이션에서, ACQUIRE 는 해당 오퍼레이션의 로드 부분에만 적용되고 RELEASE 는
-해당 오퍼레이션의 스토어 부분에만 적용됩니다.
+atomic_t.txt 에 설명된 어토믹 오퍼레이션들 중 일부는 완전히 순서잡힌 것들과
+(배리어를 사용하지 않는) 완화된 순서의 것들 외에 ACQUIRE 와 RELEASE 부류의
+것들도 존재합니다. 로드와 스토어를 모두 수행하는 조합된 어토믹 오퍼레이션에서,
+ACQUIRE 는 해당 오퍼레이션의 로드 부분에만 적용되고 RELEASE 는 해당
+오퍼레이션의 스토어 부분에만 적용됩니다.
메모리 배리어들은 두 CPU 간, 또는 CPU 와 디바이스 간에 상호작용의 가능성이 있을
때에만 필요합니다. 만약 어떤 코드에 그런 상호작용이 없을 것이 보장된다면, 해당
이 변경은 앞의 처음 두가지 결과 중 하나만이 발생할 수 있고, 세번째의 결과는
발생할 수 없도록 합니다.
-데이터 의존성 배리어는 의존적 쓰기에 대해서도 순서를 잡아줍니다:
+
+[!] 이 상당히 반직관적인 상황은 분리된 캐시를 가지는 기계들에서 가장 잘
+발생하는데, 예를 들면 한 캐시 뱅크는 짝수 번호의 캐시 라인들을 처리하고, 다른
+뱅크는 홀수 번호의 캐시 라인들을 처리하는 경우임을 알아두시기 바랍니다. 포인터
+P 는 짝수 번호 캐시 라인에 저장되어 있고, 변수 B 는 홀수 번호 캐시 라인에
+저장되어 있을 수 있습니다. 여기서 값을 읽어오는 CPU 의 캐시의 홀수 번호 처리
+뱅크는 열심히 일감을 처리중인 반면 홀수 번호 처리 뱅크는 할 일 없이 한가한
+중이라면 포인터 P (&B) 의 새로운 값과 변수 B 의 기존 값 (2) 를 볼 수 있습니다.
+
+
+의존적 쓰기들의 순서를 맞추는데에는 데이터 의존성 배리어가 필요치 않은데, 이는
+리눅스 커널이 지원하는 CPU 들은 (1) 쓰기가 정말로 일어날지, (2) 쓰기가 어디에
+이루어질지, 그리고 (3) 쓰여질 값을 확실히 알기 전까지는 쓰기를 수행하지 않기
+때문입니다. 하지만 "컨트롤 의존성" 섹션과
+Documentation/RCU/rcu_dereference.txt 파일을 주의 깊게 읽어 주시기 바랍니다:
+컴파일러는 매우 창의적인 많은 방법으로 종속성을 깰 수 있습니다.
CPU 1 CPU 2
=============== ===============
<쓰기 배리어>
WRITE_ONCE(P, &B);
Q = READ_ONCE(P);
- <데이터 의존성 배리어>
- *Q = 5;
+ WRITE_ONCE(*Q, 5);
-이 데이터 의존성 배리어는 Q 로의 읽기가 *Q 로의 스토어와 순서를 맞추게
-해줍니다. 이는 다음과 같은 결과를 막습니다:
+따라서, Q 로의 읽기와 *Q 로의 쓰기 사이에는 데이터 종속성 배리어가 필요치
+않습니다. 달리 말하면, 데이터 종속성 배리어가 없더라도 다음 결과는 생기지
+않습니다:
(Q == &B) && (B == 4)
이런 패턴은 드물게 사용되어야 함을 알아 두시기 바랍니다. 무엇보다도, 의존성
순서 규칙의 의도는 쓰기 작업을 -예방- 해서 그로 인해 발생하는 비싼 캐시 미스도
없애려는 것입니다. 이 패턴은 드물게 발생하는 에러 조건 같은것들을 기록하는데
-사용될 수 있고, 이렇게 배리어를 사용해 순서를 지키게 함으로써 그런 기록이
-사라지는 것을 막습니다.
-
-
-[!] 상당히 비직관적인 이 상황은 분리된 캐시를 가진 기계, 예를 들어 한 캐시
-뱅크가 짝수번 캐시 라인을 처리하고 다른 뱅크는 홀수번 캐시 라인을 처리하는 기계
-등에서 가장 잘 발생합니다. 포인터 P 는 홀수 번호의 캐시 라인에 있고, 변수 B 는
-짝수 번호 캐시 라인에 있다고 생각해 봅시다. 그런 상태에서 읽기 작업을 하는 CPU
-의 짝수번 뱅크는 할 일이 쌓여 매우 바쁘지만 홀수번 뱅크는 할 일이 없어 아무
-일도 하지 않고 있었다면, 포인터 P 는 새 값 (&B) 을, 그리고 변수 B 는 옛날 값
-(2) 을 가지고 있는 상태가 보여질 수도 있습니다.
+사용될 수 있으며, CPU의 자연적인 순서 보장이 그런 기록들을 사라지지 않게
+해줍니다.
데이터 의존성 배리어는 매우 중요한데, 예를 들어 RCU 시스템에서 그렇습니다.
이 코드는 객체의 업데이트된 death 마크가 레퍼런스 카운터 감소 동작
*전에* 보일 것을 보장합니다.
- 더 많은 정보를 위해선 Documentation/core-api/atomic_ops.rst 문서를 참고하세요.
- 어디서 이것들을 사용해야 할지 궁금하다면 "어토믹 오퍼레이션" 서브섹션을
+ 더 많은 정보를 위해선 Documentation/atomic_{t,bitops}.txt 문서를
참고하세요.
전체 메모리 배리어를 내포하고 또 일부는 내포하지 않지만, 커널에서 상당히
의존적으로 사용하는 기능 중 하나입니다.
-메모리의 어떤 상태를 수정하고 해당 상태에 대한 (예전의 또는 최신의) 정보를
-리턴하는 어토믹 오퍼레이션은 모두 SMP-조건적 범용 메모리 배리어(smp_mb())를
-실제 오퍼레이션의 앞과 뒤에 내포합니다. 이런 오퍼레이션은 다음의 것들을
-포함합니다:
-
- xchg();
- atomic_xchg(); atomic_long_xchg();
- atomic_inc_return(); atomic_long_inc_return();
- atomic_dec_return(); atomic_long_dec_return();
- atomic_add_return(); atomic_long_add_return();
- atomic_sub_return(); atomic_long_sub_return();
- atomic_inc_and_test(); atomic_long_inc_and_test();
- atomic_dec_and_test(); atomic_long_dec_and_test();
- atomic_sub_and_test(); atomic_long_sub_and_test();
- atomic_add_negative(); atomic_long_add_negative();
- test_and_set_bit();
- test_and_clear_bit();
- test_and_change_bit();
-
- /* exchange 조건이 성공할 때 */
- cmpxchg();
- atomic_cmpxchg(); atomic_long_cmpxchg();
- atomic_add_unless(); atomic_long_add_unless();
-
-이것들은 메모리 배리어 효과가 필요한 ACQUIRE 부류와 RELEASE 부류 오퍼레이션들을
-구현할 때, 그리고 객체 해제를 위해 레퍼런스 카운터를 조정할 때, 암묵적 메모리
-배리어 효과가 필요한 곳 등에 사용됩니다.
-
-
-다음의 오퍼레이션들은 메모리 배리어를 내포하지 _않기_ 때문에 문제가 될 수
-있지만, RELEASE 부류의 오퍼레이션들과 같은 것들을 구현할 때 사용될 수도
-있습니다:
-
- atomic_set();
- set_bit();
- clear_bit();
- change_bit();
-
-이것들을 사용할 때에는 필요하다면 적절한 (예를 들면 smp_mb__before_atomic()
-같은) 메모리 배리어가 명시적으로 함께 사용되어야 합니다.
-
-
-아래의 것들도 메모리 배리어를 내포하지 _않기_ 때문에, 일부 환경에서는 (예를
-들면 smp_mb__before_atomic() 과 같은) 명시적인 메모리 배리어 사용이 필요합니다.
-
- atomic_add();
- atomic_sub();
- atomic_inc();
- atomic_dec();
-
-이것들이 통계 생성을 위해 사용된다면, 그리고 통계 데이터 사이에 관계가 존재하지
-않는다면 메모리 배리어는 필요치 않을 겁니다.
-
-객체의 수명을 관리하기 위해 레퍼런스 카운팅 목적으로 사용된다면, 레퍼런스
-카운터는 락으로 보호되는 섹션에서만 조정되거나 호출하는 쪽이 이미 충분한
-레퍼런스를 잡고 있을 것이기 때문에 메모리 배리어는 아마 필요 없을 겁니다.
-
-만약 어떤 락을 구성하기 위해 사용된다면, 락 관련 동작은 일반적으로 작업을 특정
-순서대로 진행해야 하므로 메모리 배리어가 필요할 수 있습니다.
-
-기본적으로, 각 사용처에서는 메모리 배리어가 필요한지 아닌지 충분히 고려해야
-합니다.
-
-아래의 오퍼레이션들은 특별한 락 관련 동작들입니다:
-
- test_and_set_bit_lock();
- clear_bit_unlock();
- __clear_bit_unlock();
-
-이것들은 ACQUIRE 류와 RELEASE 류의 오퍼레이션들을 구현합니다. 락 관련 도구를
-구현할 때에는 이것들을 좀 더 선호하는 편이 나은데, 이것들의 구현은 많은
-아키텍쳐에서 최적화 될 수 있기 때문입니다.
-
-[!] 이런 상황에 사용할 수 있는 특수한 메모리 배리어 도구들이 있습니다만, 일부
-CPU 에서는 사용되는 어토믹 인스트럭션 자체에 메모리 배리어가 내포되어 있어서
-어토믹 오퍼레이션과 메모리 배리어를 함께 사용하는 게 불필요한 일이 될 수
-있는데, 그런 경우에 이 특수 메모리 배리어 도구들은 no-op 이 되어 실질적으로
-아무일도 하지 않습니다.
-
-더 많은 내용을 위해선 Documentation/core-api/atomic_ops.rst 를 참고하세요.
+더 많은 내용을 위해선 Documentation/atomic_t.txt 를 참고하세요.
디바이스 액세스
F: drivers/android/
F: drivers/staging/android/
+ANDROID GOLDFISH RTC DRIVER
+M: Miodrag Dinic <miodrag.dinic@imgtec.com>
+S: Supported
+F: Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt
+F: drivers/rtc/rtc-goldfish.c
+
ANDROID ION DRIVER
M: Laura Abbott <labbott@redhat.com>
M: Sumit Semwal <sumit.semwal@linaro.org>
F: drivers/gpu/drm/nouveau/
F: include/uapi/drm/nouveau_drm.h
+DRM DRIVER FOR PERVASIVE DISPLAYS REPAPER PANELS
+M: Noralf Trønnes <noralf@tronnes.org>
+S: Maintained
+F: drivers/gpu/drm/tinydrm/repaper.c
+F: Documentation/devicetree/bindings/display/repaper.txt
+
DRM DRIVER FOR QEMU'S CIRRUS DEVICE
M: Dave Airlie <airlied@redhat.com>
M: Gerd Hoffmann <kraxel@redhat.com>
F: drivers/gpu/drm/qxl/
F: include/uapi/drm/qxl_drm.h
-DRM DRIVER FOR PERVASIVE DISPLAYS REPAPER PANELS
-M: Noralf Trønnes <noralf@tronnes.org>
-S: Maintained
-F: drivers/gpu/drm/tinydrm/repaper.c
-F: Documentation/devicetree/bindings/display/repaper.txt
-
DRM DRIVER FOR RAGE 128 VIDEO CARDS
S: Orphan / Obsolete
F: drivers/gpu/drm/r128/
F: net/802/hippi.c
F: drivers/net/hippi/
-HISILICON NETWORK SUBSYSTEM DRIVER
+HISILICON NETWORK SUBSYSTEM 3 DRIVER (HNS3)
M: Yisen Zhuang <yisen.zhuang@huawei.com>
M: Salil Mehta <salil.mehta@huawei.com>
L: netdev@vger.kernel.org
W: http://www.hisilicon.com
S: Maintained
-F: drivers/net/ethernet/hisilicon/
-F: Documentation/devicetree/bindings/net/hisilicon*.txt
+F: drivers/net/ethernet/hisilicon/hns3/
-HISILICON NETWORK SUBSYSTEM 3 DRIVER (HNS3)
+HISILICON NETWORK SUBSYSTEM DRIVER
M: Yisen Zhuang <yisen.zhuang@huawei.com>
M: Salil Mehta <salil.mehta@huawei.com>
L: netdev@vger.kernel.org
W: http://www.hisilicon.com
S: Maintained
-F: drivers/net/ethernet/hisilicon/hns3/
+F: drivers/net/ethernet/hisilicon/
+F: Documentation/devicetree/bindings/net/hisilicon*.txt
HISILICON ROCE DRIVER
M: Lijun Ou <oulijun@huawei.com>
F: drivers/scsi/hisi_sas/
F: Documentation/devicetree/bindings/scsi/hisilicon-sas.txt
+HMM - Heterogeneous Memory Management
+M: Jérôme Glisse <jglisse@redhat.com>
+L: linux-mm@kvack.org
+S: Maintained
+F: mm/hmm*
+F: include/linux/hmm*
+
HOST AP DRIVER
M: Jouni Malinen <j@w1.fi>
L: linux-wireless@vger.kernel.org
F: virt/kvm/*
F: tools/kvm/
-KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)
-M: Paolo Bonzini <pbonzini@redhat.com>
-M: Radim KrÄmář <rkrcmar@redhat.com>
-L: kvm@vger.kernel.org
-W: http://www.linux-kvm.org
-T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
-S: Supported
-F: arch/x86/kvm/
-F: arch/x86/include/uapi/asm/kvm*
-F: arch/x86/include/asm/kvm*
-F: arch/x86/kernel/kvm.c
-F: arch/x86/kernel/kvmclock.c
-
KERNEL VIRTUAL MACHINE FOR AMD-V (KVM/amd)
M: Joerg Roedel <joro@8bytes.org>
L: kvm@vger.kernel.org
F: virt/kvm/arm/
F: include/kvm/arm_*
-KERNEL VIRTUAL MACHINE FOR POWERPC (KVM/powerpc)
-M: Alexander Graf <agraf@suse.com>
-L: kvm-ppc@vger.kernel.org
-W: http://www.linux-kvm.org/
-T: git git://github.com/agraf/linux-2.6.git
-S: Supported
-F: arch/powerpc/include/uapi/asm/kvm*
-F: arch/powerpc/include/asm/kvm*
-F: arch/powerpc/kvm/
-F: arch/powerpc/kernel/kvm*
-
KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)
M: Christoffer Dall <christoffer.dall@linaro.org>
M: Marc Zyngier <marc.zyngier@arm.com>
F: arch/mips/include/asm/kvm*
F: arch/mips/kvm/
+KERNEL VIRTUAL MACHINE FOR POWERPC (KVM/powerpc)
+M: Alexander Graf <agraf@suse.com>
+L: kvm-ppc@vger.kernel.org
+W: http://www.linux-kvm.org/
+T: git git://github.com/agraf/linux-2.6.git
+S: Supported
+F: arch/powerpc/include/uapi/asm/kvm*
+F: arch/powerpc/include/asm/kvm*
+F: arch/powerpc/kvm/
+F: arch/powerpc/kernel/kvm*
+
KERNEL VIRTUAL MACHINE for s390 (KVM/s390)
M: Christian Borntraeger <borntraeger@de.ibm.com>
M: Cornelia Huck <cohuck@redhat.com>
F: arch/s390/kvm/
F: arch/s390/mm/gmap.c
+KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)
+M: Paolo Bonzini <pbonzini@redhat.com>
+M: Radim Krčmář <rkrcmar@redhat.com>
+L: kvm@vger.kernel.org
+W: http://www.linux-kvm.org
+T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
+S: Supported
+F: arch/x86/kvm/
+F: arch/x86/include/uapi/asm/kvm*
+F: arch/x86/include/asm/kvm*
+F: arch/x86/kernel/kvm.c
+F: arch/x86/kernel/kvmclock.c
+
KERNFS
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
M: Tejun Heo <tj@kernel.org>
S: Maintained
F: tools/lib/lockdep/
-HMM - Heterogeneous Memory Management
-M: Jérôme Glisse <jglisse@redhat.com>
-L: linux-mm@kvack.org
-S: Maintained
-F: mm/hmm*
-F: include/linux/hmm*
-
LIBNVDIMM BLK: MMIO-APERTURE DRIVER
M: Ross Zwisler <ross.zwisler@linux.intel.com>
L: linux-nvdimm@lists.01.org
S: Supported
F: drivers/media/dvb-frontends/cxd2841er*
+MEDIA DRIVERS FOR DIGITAL DEVICES PCIE DEVICES
+M: Daniel Scheller <d.scheller.oss@gmail.com>
+L: linux-media@vger.kernel.org
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+S: Maintained
+F: drivers/media/pci/ddbridge/*
+
MEDIA DRIVERS FOR FREESCALE IMX
M: Steve Longerbeam <slongerbeam@gmail.com>
M: Philipp Zabel <p.zabel@pengutronix.de>
S: Maintained
F: drivers/media/dvb-frontends/stv6111*
-MEDIA DRIVERS FOR DIGITAL DEVICES PCIE DEVICES
-M: Daniel Scheller <d.scheller.oss@gmail.com>
-L: linux-media@vger.kernel.org
-W: https://linuxtv.org
-T: git git://linuxtv.org/media_tree.git
-S: Maintained
-F: drivers/media/pci/ddbridge/*
-
MEDIA INPUT INFRASTRUCTURE (V4L/DVB)
M: Mauro Carvalho Chehab <mchehab@s-opensource.com>
M: Mauro Carvalho Chehab <mchehab@kernel.org>
F: include/uapi/linux/ivtv*
F: include/uapi/linux/uvcvideo.h
+MEDIATEK CIR DRIVER
+M: Sean Wang <sean.wang@mediatek.com>
+S: Maintained
+F: drivers/media/rc/mtk-cir.c
+
MEDIATEK ETHERNET DRIVER
M: Felix Fietkau <nbd@openwrt.org>
M: John Crispin <john@phrozen.org>
S: Maintained
F: drivers/net/wireless/mediatek/mt7601u/
-MEDIATEK CIR DRIVER
-M: Sean Wang <sean.wang@mediatek.com>
-S: Maintained
-F: drivers/media/rc/mtk-cir.c
-
MEDIATEK RANDOM NUMBER GENERATOR SUPPORT
M: Sean Wang <sean.wang@mediatek.com>
S: Maintained
F: Documentation/parport*.txt
PARAVIRT_OPS INTERFACE
-M: Jeremy Fitzhardinge <jeremy@goop.org>
+M: Juergen Gross <jgross@suse.com>
M: Chris Wright <chrisw@sous-sol.org>
M: Alok Kataria <akataria@vmware.com>
M: Rusty Russell <rusty@rustcorp.com.au>
S: Supported
F: Documentation/virtual/paravirt_ops.txt
F: arch/*/kernel/paravirt*
-F: arch/*/include/asm/paravirt.h
+F: arch/*/include/asm/paravirt*.h
F: include/linux/hypervisor.h
PARIDE DRIVERS FOR PARALLEL PORT IDE DEVICES
F: drivers/tty/serial/arc_uart.c
T: git git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc.git
+SYNOPSYS ARC HSDK SDP pll clock driver
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Supported
+F: drivers/clk/clk-hsdk-pll.c
+F: Documentation/devicetree/bindings/clock/snps,hsdk-pll-clock.txt
+
+SYNOPSYS ARC SDP clock driver
+M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+S: Supported
+F: drivers/clk/axs10x/*
+F: Documentation/devicetree/bindings/clock/snps,pll-clock.txt
+
SYNOPSYS ARC SDP platform support
M: Alexey Brodkin <abrodkin@synopsys.com>
S: Supported
select HAVE_AT91_USB_CLK
select HAVE_AT91_H32MX
select HAVE_AT91_GENERATED_CLK
+ select HAVE_AT91_AUDIO_PLL
select PINCTRL_AT91PIO4
help
Select this if ou are using one of Atmel's SAMA5D2 family SoC.
config HAVE_AT91_GENERATED_CLK
bool
+config HAVE_AT91_AUDIO_PLL
+ bool
+
config SOC_SAM_V4_V5
bool
extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; /* defined in head.S */
+struct vm_area_struct;
+
/*
* or32 doesn't have any external MMU info: the kernel page
* tables contain all the necessary information.
#define load_ldt(ldt) asm volatile("lldt %0"::"m" (ldt))
#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
#define store_tr(tr) (tr = native_store_tr())
#define load_TLS(t, cpu) native_load_tls(t, cpu)
asm volatile("sgdt %0":"=m" (*dtr));
}
-static inline void native_store_idt(struct desc_ptr *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
{
asm volatile("sidt %0":"=m" (*dtr));
}
PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
}
-static inline unsigned long __read_cr4(void)
-{
- return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
-}
-
static inline void __write_cr4(unsigned long x)
{
PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
{
PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
}
-static inline void store_idt(struct desc_ptr *dtr)
-{
- PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
-}
static inline unsigned long paravirt_store_tr(void)
{
return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
PVOP_VCALL1(pv_mmu_ops.release_p4d, pfn);
}
-static inline void pte_update(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep)
-{
- PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
-}
-
static inline pte_t __pte(pteval_t val)
{
pteval_t ret;
PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
}
-static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
- pmd_t *pmdp, pmd_t pmd)
-{
- if (sizeof(pmdval_t) > sizeof(long))
- /* 5 arg words */
- pv_mmu_ops.set_pmd_at(mm, addr, pmdp, pmd);
- else
- PVOP_VCALL4(pv_mmu_ops.set_pmd_at, mm, addr, pmdp,
- native_pmd_val(pmd));
-}
-
-static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
- pud_t *pudp, pud_t pud)
-{
- if (sizeof(pudval_t) > sizeof(long))
- /* 5 arg words */
- pv_mmu_ops.set_pud_at(mm, addr, pudp, pud);
- else
- PVOP_VCALL4(pv_mmu_ops.set_pud_at, mm, addr, pudp,
- native_pud_val(pud));
-}
-
static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
{
pmdval_t val = native_pmd_val(pmd);
unsigned long (*read_cr0)(void);
void (*write_cr0)(unsigned long);
- unsigned long (*read_cr4)(void);
void (*write_cr4)(unsigned long);
#ifdef CONFIG_X86_64
void (*load_tr_desc)(void);
void (*load_gdt)(const struct desc_ptr *);
void (*load_idt)(const struct desc_ptr *);
- /* store_gdt has been removed. */
- void (*store_idt)(struct desc_ptr *);
void (*set_ldt)(const void *desc, unsigned entries);
unsigned long (*store_tr)(void);
void (*load_tls)(struct thread_struct *t, unsigned int cpu);
void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval);
void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
- void (*set_pmd_at)(struct mm_struct *mm, unsigned long addr,
- pmd_t *pmdp, pmd_t pmdval);
- void (*set_pud_at)(struct mm_struct *mm, unsigned long addr,
- pud_t *pudp, pud_t pudval);
- void (*pte_update)(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep);
pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr,
pte_t *ptep);
#else /* !CONFIG_PARAVIRT */
#define set_pte(ptep, pte) native_set_pte(ptep, pte)
#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
-#define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd)
-#define set_pud_at(mm, addr, pudp, pud) native_set_pud_at(mm, addr, pudp, pud)
#define set_pte_atomic(ptep, pte) \
native_set_pte_atomic(ptep, pte)
#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
#define pmd_clear(pmd) native_pmd_clear(pmd)
-#define pte_update(mm, addr, ptep) do { } while (0)
-
#define pgd_val(x) native_pgd_val(x)
#define __pgd(x) native_make_pgd(x)
native_set_pte(ptep, pte);
}
-static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr,
- pmd_t *pmdp , pmd_t pmd)
+static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp, pmd_t pmd)
{
native_set_pmd(pmdp, pmd);
}
-static inline void native_set_pud_at(struct mm_struct *mm, unsigned long addr,
- pud_t *pudp, pud_t pud)
+static inline void set_pud_at(struct mm_struct *mm, unsigned long addr,
+ pud_t *pudp, pud_t pud)
{
native_set_pud(pudp, pud);
}
-#ifndef CONFIG_PARAVIRT
-/*
- * Rules for using pte_update - it must be called after any PTE update which
- * has not been done using the set_pte / clear_pte interfaces. It is used by
- * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
- * updates should either be sets, clears, or set_pte_atomic for P->P
- * transitions, which means this hook should only be called for user PTEs.
- * This hook implies a P->P protection or access change has taken place, which
- * requires a subsequent TLB flush.
- */
-#define pte_update(mm, addr, ptep) do { } while (0)
-#endif
-
/*
* We only update the dirty/accessed state if we set
* the dirty bit by hand in the kernel, since the hardware
pte_t *ptep)
{
pte_t pte = native_ptep_get_and_clear(ptep);
- pte_update(mm, addr, ptep);
return pte;
}
unsigned long addr, pte_t *ptep)
{
clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
- pte_update(mm, addr, ptep);
}
#define flush_tlb_fix_spurious_fault(vma, address) do { } while (0)
extern asmlinkage void native_load_gs_index(unsigned);
+static inline unsigned long __read_cr4(void)
+{
+ return native_read_cr4();
+}
+
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else
native_write_cr3(x);
}
-static inline unsigned long __read_cr4(void)
-{
- return native_read_cr4();
-}
-
static inline void __write_cr4(unsigned long x)
{
native_write_cr4(x);
/* Recommend using the newer ExProcessorMasks interface */
#define HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED (1 << 11)
-/*
- * HV_VP_SET available
- */
-#define HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED (1 << 11)
-
-
/*
* Crash notification flag.
*/
__setup("nompx", x86_mpx_setup);
#ifdef CONFIG_X86_64
-static int __init x86_pcid_setup(char *s)
+static int __init x86_nopcid_setup(char *s)
{
- /* require an exact match without trailing characters */
- if (strlen(s))
- return 0;
+ /* nopcid doesn't accept parameters */
+ if (s)
+ return -EINVAL;
/* do not emit a message if the feature is not present */
if (!boot_cpu_has(X86_FEATURE_PCID))
- return 1;
+ return 0;
setup_clear_cpu_cap(X86_FEATURE_PCID);
pr_info("nopcid: PCID feature disabled\n");
- return 1;
+ return 0;
}
-__setup("nopcid", x86_pcid_setup);
+early_param("nopcid", x86_nopcid_setup);
#endif
static int __init x86_noinvpcid_setup(char *s)
}
}
-static void setup_pcid(struct cpuinfo_x86 *c)
-{
- if (cpu_has(c, X86_FEATURE_PCID)) {
- if (cpu_has(c, X86_FEATURE_PGE)) {
- /*
- * We'd like to use cr4_set_bits_and_update_boot(),
- * but we can't. CR4.PCIDE is special and can only
- * be set in long mode, and the early CPU init code
- * doesn't know this and would try to restore CR4.PCIDE
- * prior to entering long mode.
- *
- * Instead, we rely on the fact that hotplug, resume,
- * etc all fully restore CR4 before they write anything
- * that could have nonzero PCID bits to CR3. CR4.PCIDE
- * has no effect on the page tables themselves, so we
- * don't need it to be restored early.
- */
- cr4_set_bits(X86_CR4_PCIDE);
- } else {
- /*
- * flush_tlb_all(), as currently implemented, won't
- * work if PCID is on but PGE is not. Since that
- * combination doesn't exist on real hardware, there's
- * no reason to try to fully support it, but it's
- * polite to avoid corrupting data if we're on
- * an improperly configured VM.
- */
- clear_cpu_cap(c, X86_FEATURE_PCID);
- }
- }
-}
-
/*
* Protection Keys are not available in 32-bit mode.
*/
setup_smep(c);
setup_smap(c);
- /* Set up PCID */
- setup_pcid(c);
-
/*
* The vendor-specific functions might have changed features.
* Now we do "generic changes."
void hv_setup_vmbus_irq(void (*handler)(void))
{
vmbus_handler = handler;
- /* Setup the IDT for hypervisor callback */
- alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector);
}
void hv_remove_vmbus_irq(void)
*/
x86_platform.apic_post_init = hyperv_init;
hyperv_setup_mmu_ops();
+ /* Setup the IDT for hypervisor callback */
+ alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector);
#endif
}
.set_debugreg = native_set_debugreg,
.read_cr0 = native_read_cr0,
.write_cr0 = native_write_cr0,
- .read_cr4 = native_read_cr4,
.write_cr4 = native_write_cr4,
#ifdef CONFIG_X86_64
.read_cr8 = native_read_cr8,
.set_ldt = native_set_ldt,
.load_gdt = native_load_gdt,
.load_idt = native_load_idt,
- .store_idt = native_store_idt,
.store_tr = native_store_tr,
.load_tls = native_load_tls,
#ifdef CONFIG_X86_64
.set_pte = native_set_pte,
.set_pte_at = native_set_pte_at,
.set_pmd = native_set_pmd,
- .set_pmd_at = native_set_pmd_at,
- .pte_update = paravirt_nop,
.ptep_modify_prot_start = __ptep_modify_prot_start,
.ptep_modify_prot_commit = __ptep_modify_prot_commit,
.pmd_clear = native_pmd_clear,
#endif
.set_pud = native_set_pud,
- .set_pud_at = native_set_pud_at,
.pmd_val = PTE_IDENT,
.make_pmd = PTE_IDENT,
* with the current CR4 value. This may not be necessary, but
* auditing all the early-boot CR4 manipulation would be needed to
* rule it out.
+ *
+ * Mask off features that don't work outside long mode (just
+ * PCIDE for now).
*/
- mmu_cr4_features = __read_cr4();
+ mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE;
memblock_set_current_limit(get_max_mapped());
static void notrace start_secondary(void *unused)
{
/*
- * Don't put *anything* before cpu_init(), SMP booting is too
- * fragile that we want to limit the things done here to the
- * most necessary things.
+ * Don't put *anything* except direct CPU state initialization
+ * before cpu_init(), SMP booting is too fragile that we want to
+ * limit the things done here to the most necessary things.
*/
+ if (boot_cpu_has(X86_FEATURE_PCID))
+ __write_cr4(__read_cr4() | X86_CR4_PCIDE);
cpu_init();
x86_cpuinit.early_percpu_clock_init();
preempt_disable();
vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
- native_store_idt(&dt);
+ store_idt(&dt);
vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
vmx->host_idt_base = dt.address;
#include <asm/microcode.h>
#include <asm/kaslr.h>
#include <asm/hypervisor.h>
+#include <asm/cpufeature.h>
/*
* We need to define the tracepoints somewhere, and tlb.c
}
}
+static void setup_pcid(void)
+{
+#ifdef CONFIG_X86_64
+ if (boot_cpu_has(X86_FEATURE_PCID)) {
+ if (boot_cpu_has(X86_FEATURE_PGE)) {
+ /*
+ * This can't be cr4_set_bits_and_update_boot() --
+ * the trampoline code can't handle CR4.PCIDE and
+ * it wouldn't do any good anyway. Despite the name,
+ * cr4_set_bits_and_update_boot() doesn't actually
+ * cause the bits in question to remain set all the
+ * way through the secondary boot asm.
+ *
+ * Instead, we brute-force it and set CR4.PCIDE
+ * manually in start_secondary().
+ */
+ cr4_set_bits(X86_CR4_PCIDE);
+ } else {
+ /*
+ * flush_tlb_all(), as currently implemented, won't
+ * work if PCID is on but PGE is not. Since that
+ * combination doesn't exist on real hardware, there's
+ * no reason to try to fully support it, but it's
+ * polite to avoid corrupting data if we're on
+ * an improperly configured VM.
+ */
+ setup_clear_cpu_cap(X86_FEATURE_PCID);
+ }
+ }
+#endif
+}
+
#ifdef CONFIG_X86_32
#define NR_RANGE_MR 3
#else /* CONFIG_X86_64 */
unsigned long end;
probe_page_size_mask();
+ setup_pcid();
#ifdef CONFIG_X86_64
end = max_pfn << PAGE_SHIFT;
{
int changed = !pte_same(*ptep, entry);
- if (changed && dirty) {
+ if (changed && dirty)
*ptep = entry;
- pte_update(vma->vm_mm, address, ptep);
- }
return changed;
}
ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
(unsigned long *) &ptep->pte);
- if (ret)
- pte_update(vma->vm_mm, addr, ptep);
-
return ret;
}
* hypothetical buggy code that directly switches to swapper_pg_dir
* without going through leave_mm() / switch_mm_irqs_off() or that
* does something like write_cr3(read_cr3_pa()).
+ *
+ * Only do this check if CONFIG_DEBUG_VM=y because __read_cr3()
+ * isn't free.
*/
- VM_BUG_ON(__read_cr3() != (__sme_pa(real_prev->pgd) | prev_asid));
+#ifdef CONFIG_DEBUG_VM
+ if (WARN_ON_ONCE(__read_cr3() !=
+ (__sme_pa(real_prev->pgd) | prev_asid))) {
+ /*
+ * If we were to BUG here, we'd be very likely to kill
+ * the system so hard that we don't see the call trace.
+ * Try to recover instead by ignoring the error and doing
+ * a global flush to minimize the chance of corruption.
+ *
+ * (This is far from being a fully correct recovery.
+ * Architecturally, the CPU could prefetch something
+ * back into an incorrect ASID slot and leave it there
+ * to cause trouble down the road. It's better than
+ * nothing, though.)
+ */
+ __flush_tlb_all();
+ }
+#endif
if (real_prev == next) {
VM_BUG_ON(this_cpu_read(cpu_tlbstate.ctxs[prev_asid].ctx_id) !=
return -EOVERFLOW;
rdr->jump_address = (unsigned long)restore_registers;
rdr->jump_address_phys = __pa_symbol(restore_registers);
- rdr->cr3 = restore_cr3;
+
+ /*
+ * The restore code fixes up CR3 and CR4 in the following sequence:
+ *
+ * [in hibernation asm]
+ * 1. CR3 <= temporary page tables
+ * 2. CR4 <= mmu_cr4_features (from the kernel that restores us)
+ * 3. CR3 <= rdr->cr3
+ * 4. CR4 <= mmu_cr4_features (from us, i.e. the image kernel)
+ * [in restore_processor_state()]
+ * 5. CR4 <= saved CR4
+ * 6. CR3 <= saved CR3
+ *
+ * Our mmu_cr4_features has CR4.PCIDE=0, and toggling
+ * CR4.PCIDE while CR3's PCID bits are nonzero is illegal, so
+ * rdr->cr3 needs to point to valid page tables but must not
+ * have any of the PCID bits set.
+ */
+ rdr->cr3 = restore_cr3 & ~CR3_PCID_MASK;
+
rdr->magic = RESTORE_MAGIC;
hibernation_e820_save(rdr->e820_digest);
.read_cr0 = xen_read_cr0,
.write_cr0 = xen_write_cr0,
- .read_cr4 = native_read_cr4,
.write_cr4 = xen_write_cr4,
#ifdef CONFIG_X86_64
.alloc_ldt = xen_alloc_ldt,
.free_ldt = xen_free_ldt,
- .store_idt = native_store_idt,
.store_tr = xen_store_tr,
.write_ldt_entry = xen_write_ldt_entry,
.flush_tlb_single = xen_flush_tlb_single,
.flush_tlb_others = xen_flush_tlb_others,
- .pte_update = paravirt_nop,
-
.pgd_alloc = xen_pgd_alloc,
.pgd_free = xen_pgd_free,
if (q->mq_ops) {
if (blk_queue_io_stat(q))
blk_account_io_start(rq, true);
- blk_mq_sched_insert_request(rq, false, true, false, false);
+ /*
+ * Since we have a scheduler attached on the top device,
+ * bypass a potential scheduler on the bottom device for
+ * insert.
+ */
+ blk_mq_request_bypass_insert(rq);
return BLK_STS_OK;
}
*/
static unsigned int __blkdev_sectors_to_bio_pages(sector_t nr_sects)
{
- sector_t bytes = (nr_sects << 9) + PAGE_SIZE - 1;
+ sector_t pages = DIV_ROUND_UP_SECTOR_T(nr_sects, PAGE_SIZE / 512);
- return min(bytes >> PAGE_SHIFT, (sector_t)BIO_MAX_PAGES);
+ return min(pages, (sector_t)BIO_MAX_PAGES);
}
/**
blk_mq_hctx_mark_pending(hctx, ctx);
}
+/*
+ * Should only be used carefully, when the caller knows we want to
+ * bypass a potential IO scheduler on the target device.
+ */
+void blk_mq_request_bypass_insert(struct request *rq)
+{
+ struct blk_mq_ctx *ctx = rq->mq_ctx;
+ struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(rq->q, ctx->cpu);
+
+ spin_lock(&hctx->lock);
+ list_add_tail(&rq->queuelist, &hctx->dispatch);
+ spin_unlock(&hctx->lock);
+
+ blk_mq_run_hw_queue(hctx, false);
+}
+
void blk_mq_insert_requests(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
struct list_head *list)
*/
void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
bool at_head);
+void blk_mq_request_bypass_insert(struct request *rq);
void blk_mq_insert_requests(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
struct list_head *list);
#define GENERIC_HOST_SESSION_NUM 0x41
#define TPER_SYNC_SUPPORTED 0x01
+#define MBR_ENABLED_MASK 0x10
#define TINY_ATOM_DATA_MASK 0x3F
#define TINY_ATOM_SIGNED 0x40
struct opal_dev {
bool supported;
+ bool mbr_enabled;
void *data;
sec_send_recv *send_recv;
return true;
}
+static bool check_mbrenabled(const void *data)
+{
+ const struct d0_locking_features *lfeat = data;
+ u8 sup_feat = lfeat->supported_features;
+
+ return !!(sup_feat & MBR_ENABLED_MASK);
+}
+
static bool check_sum(const void *data)
{
const struct d0_single_user_mode *sum = data;
u32 hlen = be32_to_cpu(hdr->length);
print_buffer(dev->resp, hlen);
+ dev->mbr_enabled = false;
if (hlen > IO_BUFFER_LENGTH - sizeof(*hdr)) {
pr_debug("Discovery length overflows buffer (%zu+%u)/%u\n",
check_geometry(dev, body);
break;
case FC_LOCKING:
+ dev->mbr_enabled = check_mbrenabled(body->features);
+ break;
case FC_ENTERPRISE:
case FC_DATASTORE:
/* some ignored properties */
return next(dev);
}
+static int __opal_set_mbr_done(struct opal_dev *dev, struct opal_key *key)
+{
+ u8 mbr_done_tf = 1;
+ const struct opal_step mbrdone_step [] = {
+ { opal_discovery0, },
+ { start_admin1LSP_opal_session, key },
+ { set_mbr_done, &mbr_done_tf },
+ { end_opal_session, },
+ { NULL, }
+ };
+
+ dev->steps = mbrdone_step;
+ return next(dev);
+}
+
static int opal_lock_unlock(struct opal_dev *dev,
struct opal_lock_unlock *lk_unlk)
{
suspend->unlk.session.sum);
was_failure = true;
}
+ if (dev->mbr_enabled) {
+ ret = __opal_set_mbr_done(dev, &suspend->unlk.session.opal_key);
+ if (ret)
+ pr_debug("Failed to set MBR Done in S3 resume\n");
+ }
}
mutex_unlock(&dev->dev_lock);
return was_failure;
source "drivers/clk/versatile/Kconfig"
+config CLK_HSDK
+ bool "PLL Driver for HSDK platform"
+ depends on OF || COMPILE_TEST
+ ---help---
+ This driver supports the HSDK core, system, ddr, tunnel and hdmi PLLs
+ control.
+
config COMMON_CLK_MAX77686
tristate "Clock driver for Maxim 77620/77686/77802 MFD"
depends on MFD_MAX77686 || MFD_MAX77620 || COMPILE_TEST
clock.
config COMMON_CLK_RK808
- tristate "Clock driver for RK808/RK818"
+ tristate "Clock driver for RK805/RK808/RK818"
depends on MFD_RK808
---help---
- This driver supports RK808 and RK818 crystal oscillator clock. These
+ This driver supports RK805, RK808 and RK818 crystal oscillator clock. These
multi-function devices have two fixed-rate oscillators,
clocked at 32KHz each. Clkout1 is always on, Clkout2 can off
by control register.
Support for the OXNAS SoC Family clocks.
config COMMON_CLK_VC5
- tristate "Clock driver for IDT VersaClock5 devices"
+ tristate "Clock driver for IDT VersaClock 5,6 devices"
depends on I2C
depends on OF
select REGMAP_I2C
help
---help---
- This driver supports the IDT VersaClock5 programmable clock
- generator.
+ This driver supports the IDT VersaClock 5 and VersaClock 6
+ programmable clock generators.
source "drivers/clk/bcm/Kconfig"
source "drivers/clk/hisilicon/Kconfig"
obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o
obj-$(CONFIG_COMMON_CLK_GEMINI) += clk-gemini.o
obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
+obj-$(CONFIG_CLK_HSDK) += clk-hsdk-pll.o
obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
-obj-$(CONFIG_ARCH_MB86S7X) += clk-mb86s7x.o
obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o
obj-$(CONFIG_COMMON_CLK_SI514) += clk-si514.o
obj-$(CONFIG_COMMON_CLK_SI570) += clk-si570.o
obj-$(CONFIG_ARCH_STM32) += clk-stm32f4.o
+obj-$(CONFIG_ARCH_STM32) += clk-stm32h7.o
obj-$(CONFIG_ARCH_TANGO) += clk-tango4.o
obj-$(CONFIG_CLK_TWL6040) += clk-twl6040.o
obj-$(CONFIG_ARCH_U300) += clk-u300.o
obj-y += clk-slow.o clk-main.o clk-pll.o clk-plldiv.o clk-master.o
obj-y += clk-system.o clk-peripheral.o clk-programmable.o
+obj-$(CONFIG_HAVE_AT91_AUDIO_PLL) += clk-audio-pll.o
obj-$(CONFIG_HAVE_AT91_UTMI) += clk-utmi.o
obj-$(CONFIG_HAVE_AT91_USB_CLK) += clk-usb.o
obj-$(CONFIG_HAVE_AT91_SMD) += clk-smd.o
--- /dev/null
+/*
+ * Copyright (C) 2016 Atmel Corporation,
+ * Songjun Wu <songjun.wu@atmel.com>,
+ * Nicolas Ferre <nicolas.ferre@atmel.com>
+ * Copyright (C) 2017 Free Electrons,
+ * Quentin Schulz <quentin.schulz@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * The Sama5d2 SoC has two audio PLLs (PMC and PAD) that shares the same parent
+ * (FRAC). FRAC can output between 620 and 700MHz and only multiply the rate of
+ * its own parent. PMC and PAD can then divide the FRAC rate to best match the
+ * asked rate.
+ *
+ * Traits of FRAC clock:
+ * enable - clk_enable writes nd, fracr parameters and enables PLL
+ * rate - rate is adjustable.
+ * clk->rate = parent->rate * ((nd + 1) + (fracr / 2^22))
+ * parent - fixed parent. No clk_set_parent support
+ *
+ * Traits of PMC clock:
+ * enable - clk_enable writes qdpmc, and enables PMC output
+ * rate - rate is adjustable.
+ * clk->rate = parent->rate / (qdpmc + 1)
+ * parent - fixed parent. No clk_set_parent support
+ *
+ * Traits of PAD clock:
+ * enable - clk_enable writes divisors and enables PAD output
+ * rate - rate is adjustable.
+ * clk->rate = parent->rate / (qdaudio * div))
+ * parent - fixed parent. No clk_set_parent support
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clk/at91_pmc.h>
+#include <linux/of.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define AUDIO_PLL_DIV_FRAC BIT(22)
+#define AUDIO_PLL_ND_MAX (AT91_PMC_AUDIO_PLL_ND_MASK >> \
+ AT91_PMC_AUDIO_PLL_ND_OFFSET)
+
+#define AUDIO_PLL_QDPAD(qd, div) ((AT91_PMC_AUDIO_PLL_QDPAD_EXTDIV(qd) & \
+ AT91_PMC_AUDIO_PLL_QDPAD_EXTDIV_MASK) | \
+ (AT91_PMC_AUDIO_PLL_QDPAD_DIV(div) & \
+ AT91_PMC_AUDIO_PLL_QDPAD_DIV_MASK))
+
+#define AUDIO_PLL_QDPMC_MAX (AT91_PMC_AUDIO_PLL_QDPMC_MASK >> \
+ AT91_PMC_AUDIO_PLL_QDPMC_OFFSET)
+
+#define AUDIO_PLL_FOUT_MIN 620000000UL
+#define AUDIO_PLL_FOUT_MAX 700000000UL
+
+struct clk_audio_frac {
+ struct clk_hw hw;
+ struct regmap *regmap;
+ u32 fracr;
+ u8 nd;
+};
+
+struct clk_audio_pad {
+ struct clk_hw hw;
+ struct regmap *regmap;
+ u8 qdaudio;
+ u8 div;
+};
+
+struct clk_audio_pmc {
+ struct clk_hw hw;
+ struct regmap *regmap;
+ u8 qdpmc;
+};
+
+#define to_clk_audio_frac(hw) container_of(hw, struct clk_audio_frac, hw)
+#define to_clk_audio_pad(hw) container_of(hw, struct clk_audio_pad, hw)
+#define to_clk_audio_pmc(hw) container_of(hw, struct clk_audio_pmc, hw)
+
+static int clk_audio_pll_frac_enable(struct clk_hw *hw)
+{
+ struct clk_audio_frac *frac = to_clk_audio_frac(hw);
+
+ regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_RESETN, 0);
+ regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_RESETN,
+ AT91_PMC_AUDIO_PLL_RESETN);
+ regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL1,
+ AT91_PMC_AUDIO_PLL_FRACR_MASK, frac->fracr);
+
+ /*
+ * reset and enable have to be done in 2 separated writes
+ * for AT91_PMC_AUDIO_PLL0
+ */
+ regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_PLLEN |
+ AT91_PMC_AUDIO_PLL_ND_MASK,
+ AT91_PMC_AUDIO_PLL_PLLEN |
+ AT91_PMC_AUDIO_PLL_ND(frac->nd));
+
+ return 0;
+}
+
+static int clk_audio_pll_pad_enable(struct clk_hw *hw)
+{
+ struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw);
+
+ regmap_update_bits(apad_ck->regmap, AT91_PMC_AUDIO_PLL1,
+ AT91_PMC_AUDIO_PLL_QDPAD_MASK,
+ AUDIO_PLL_QDPAD(apad_ck->qdaudio, apad_ck->div));
+ regmap_update_bits(apad_ck->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_PADEN, AT91_PMC_AUDIO_PLL_PADEN);
+
+ return 0;
+}
+
+static int clk_audio_pll_pmc_enable(struct clk_hw *hw)
+{
+ struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw);
+
+ regmap_update_bits(apmc_ck->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_PMCEN |
+ AT91_PMC_AUDIO_PLL_QDPMC_MASK,
+ AT91_PMC_AUDIO_PLL_PMCEN |
+ AT91_PMC_AUDIO_PLL_QDPMC(apmc_ck->qdpmc));
+ return 0;
+}
+
+static void clk_audio_pll_frac_disable(struct clk_hw *hw)
+{
+ struct clk_audio_frac *frac = to_clk_audio_frac(hw);
+
+ regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_PLLEN, 0);
+ /* do it in 2 separated writes */
+ regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_RESETN, 0);
+}
+
+static void clk_audio_pll_pad_disable(struct clk_hw *hw)
+{
+ struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw);
+
+ regmap_update_bits(apad_ck->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_PADEN, 0);
+}
+
+static void clk_audio_pll_pmc_disable(struct clk_hw *hw)
+{
+ struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw);
+
+ regmap_update_bits(apmc_ck->regmap, AT91_PMC_AUDIO_PLL0,
+ AT91_PMC_AUDIO_PLL_PMCEN, 0);
+}
+
+static unsigned long clk_audio_pll_fout(unsigned long parent_rate,
+ unsigned long nd, unsigned long fracr)
+{
+ unsigned long long fr = (unsigned long long)parent_rate * fracr;
+
+ pr_debug("A PLL: %s, fr = %llu\n", __func__, fr);
+
+ fr = DIV_ROUND_CLOSEST_ULL(fr, AUDIO_PLL_DIV_FRAC);
+
+ pr_debug("A PLL: %s, fr = %llu\n", __func__, fr);
+
+ return parent_rate * (nd + 1) + fr;
+}
+
+static unsigned long clk_audio_pll_frac_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct clk_audio_frac *frac = to_clk_audio_frac(hw);
+ unsigned long fout;
+
+ fout = clk_audio_pll_fout(parent_rate, frac->nd, frac->fracr);
+
+ pr_debug("A PLL: %s, fout = %lu (nd = %u, fracr = %lu)\n", __func__,
+ fout, frac->nd, (unsigned long)frac->fracr);
+
+ return fout;
+}
+
+static unsigned long clk_audio_pll_pad_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw);
+ unsigned long apad_rate = 0;
+
+ if (apad_ck->qdaudio && apad_ck->div)
+ apad_rate = parent_rate / (apad_ck->qdaudio * apad_ck->div);
+
+ pr_debug("A PLL/PAD: %s, apad_rate = %lu (div = %u, qdaudio = %u)\n",
+ __func__, apad_rate, apad_ck->div, apad_ck->qdaudio);
+
+ return apad_rate;
+}
+
+static unsigned long clk_audio_pll_pmc_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw);
+ unsigned long apmc_rate = 0;
+
+ apmc_rate = parent_rate / (apmc_ck->qdpmc + 1);
+
+ pr_debug("A PLL/PMC: %s, apmc_rate = %lu (qdpmc = %u)\n", __func__,
+ apmc_rate, apmc_ck->qdpmc);
+
+ return apmc_rate;
+}
+
+static int clk_audio_pll_frac_compute_frac(unsigned long rate,
+ unsigned long parent_rate,
+ unsigned long *nd,
+ unsigned long *fracr)
+{
+ unsigned long long tmp, rem;
+
+ if (!rate)
+ return -EINVAL;
+
+ tmp = rate;
+ rem = do_div(tmp, parent_rate);
+ if (!tmp || tmp >= AUDIO_PLL_ND_MAX)
+ return -EINVAL;
+
+ *nd = tmp - 1;
+
+ tmp = rem * AUDIO_PLL_DIV_FRAC;
+ tmp = DIV_ROUND_CLOSEST_ULL(tmp, parent_rate);
+ if (tmp > AT91_PMC_AUDIO_PLL_FRACR_MASK)
+ return -EINVAL;
+
+ /* we can cast here as we verified the bounds just above */
+ *fracr = (unsigned long)tmp;
+
+ return 0;
+}
+
+static int clk_audio_pll_frac_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ unsigned long fracr, nd;
+ int ret;
+
+ pr_debug("A PLL: %s, rate = %lu (parent_rate = %lu)\n", __func__,
+ req->rate, req->best_parent_rate);
+
+ req->rate = clamp(req->rate, AUDIO_PLL_FOUT_MIN, AUDIO_PLL_FOUT_MAX);
+
+ req->min_rate = max(req->min_rate, AUDIO_PLL_FOUT_MIN);
+ req->max_rate = min(req->max_rate, AUDIO_PLL_FOUT_MAX);
+
+ ret = clk_audio_pll_frac_compute_frac(req->rate, req->best_parent_rate,
+ &nd, &fracr);
+ if (ret)
+ return ret;
+
+ req->rate = clk_audio_pll_fout(req->best_parent_rate, nd, fracr);
+
+ req->best_parent_hw = clk_hw_get_parent(hw);
+
+ pr_debug("A PLL: %s, best_rate = %lu (nd = %lu, fracr = %lu)\n",
+ __func__, req->rate, nd, fracr);
+
+ return 0;
+}
+
+static long clk_audio_pll_pad_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct clk_hw *pclk = clk_hw_get_parent(hw);
+ long best_rate = -EINVAL;
+ unsigned long best_parent_rate;
+ unsigned long tmp_qd;
+ u32 div;
+ long tmp_rate;
+ int tmp_diff;
+ int best_diff = -1;
+
+ pr_debug("A PLL/PAD: %s, rate = %lu (parent_rate = %lu)\n", __func__,
+ rate, *parent_rate);
+
+ /*
+ * Rate divisor is actually made of two different divisors, multiplied
+ * between themselves before dividing the rate.
+ * tmp_qd goes from 1 to 31 and div is either 2 or 3.
+ * In order to avoid testing twice the rate divisor (e.g. divisor 12 can
+ * be found with (tmp_qd, div) = (2, 6) or (3, 4)), we remove any loop
+ * for a rate divisor when div is 2 and tmp_qd is a multiple of 3.
+ * We cannot inverse it (condition div is 3 and tmp_qd is even) or we
+ * would miss some rate divisor that aren't reachable with div being 2
+ * (e.g. rate divisor 90 is made with div = 3 and tmp_qd = 30, thus
+ * tmp_qd is even so we skip it because we think div 2 could make this
+ * rate divisor which isn't possible since tmp_qd has to be <= 31).
+ */
+ for (tmp_qd = 1; tmp_qd < AT91_PMC_AUDIO_PLL_QDPAD_EXTDIV_MAX; tmp_qd++)
+ for (div = 2; div <= 3; div++) {
+ if (div == 2 && tmp_qd % 3 == 0)
+ continue;
+
+ best_parent_rate = clk_hw_round_rate(pclk,
+ rate * tmp_qd * div);
+ tmp_rate = best_parent_rate / (div * tmp_qd);
+ tmp_diff = abs(rate - tmp_rate);
+
+ if (best_diff < 0 || best_diff > tmp_diff) {
+ *parent_rate = best_parent_rate;
+ best_rate = tmp_rate;
+ best_diff = tmp_diff;
+ }
+ }
+
+ pr_debug("A PLL/PAD: %s, best_rate = %ld, best_parent_rate = %lu\n",
+ __func__, best_rate, best_parent_rate);
+
+ return best_rate;
+}
+
+static long clk_audio_pll_pmc_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct clk_hw *pclk = clk_hw_get_parent(hw);
+ long best_rate = -EINVAL;
+ unsigned long best_parent_rate = 0;
+ u32 tmp_qd = 0, div;
+ long tmp_rate;
+ int tmp_diff;
+ int best_diff = -1;
+
+ pr_debug("A PLL/PMC: %s, rate = %lu (parent_rate = %lu)\n", __func__,
+ rate, *parent_rate);
+
+ for (div = 1; div <= AUDIO_PLL_QDPMC_MAX; div++) {
+ best_parent_rate = clk_round_rate(pclk->clk, rate * div);
+ tmp_rate = best_parent_rate / div;
+ tmp_diff = abs(rate - tmp_rate);
+
+ if (best_diff < 0 || best_diff > tmp_diff) {
+ *parent_rate = best_parent_rate;
+ best_rate = tmp_rate;
+ best_diff = tmp_diff;
+ tmp_qd = div;
+ }
+ }
+
+ pr_debug("A PLL/PMC: %s, best_rate = %ld, best_parent_rate = %lu (qd = %d)\n",
+ __func__, best_rate, *parent_rate, tmp_qd - 1);
+
+ return best_rate;
+}
+
+static int clk_audio_pll_frac_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_audio_frac *frac = to_clk_audio_frac(hw);
+ unsigned long fracr, nd;
+ int ret;
+
+ pr_debug("A PLL: %s, rate = %lu (parent_rate = %lu)\n", __func__, rate,
+ parent_rate);
+
+ if (rate < AUDIO_PLL_FOUT_MIN || rate > AUDIO_PLL_FOUT_MAX)
+ return -EINVAL;
+
+ ret = clk_audio_pll_frac_compute_frac(rate, parent_rate, &nd, &fracr);
+ if (ret)
+ return ret;
+
+ frac->nd = nd;
+ frac->fracr = fracr;
+
+ return 0;
+}
+
+static int clk_audio_pll_pad_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw);
+ u8 tmp_div;
+
+ pr_debug("A PLL/PAD: %s, rate = %lu (parent_rate = %lu)\n", __func__,
+ rate, parent_rate);
+
+ if (!rate)
+ return -EINVAL;
+
+ tmp_div = parent_rate / rate;
+ if (tmp_div % 3 == 0) {
+ apad_ck->qdaudio = tmp_div / 3;
+ apad_ck->div = 3;
+ } else {
+ apad_ck->qdaudio = tmp_div / 2;
+ apad_ck->div = 2;
+ }
+
+ return 0;
+}
+
+static int clk_audio_pll_pmc_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw);
+
+ if (!rate)
+ return -EINVAL;
+
+ pr_debug("A PLL/PMC: %s, rate = %lu (parent_rate = %lu)\n", __func__,
+ rate, parent_rate);
+
+ apmc_ck->qdpmc = parent_rate / rate - 1;
+
+ return 0;
+}
+
+static const struct clk_ops audio_pll_frac_ops = {
+ .enable = clk_audio_pll_frac_enable,
+ .disable = clk_audio_pll_frac_disable,
+ .recalc_rate = clk_audio_pll_frac_recalc_rate,
+ .determine_rate = clk_audio_pll_frac_determine_rate,
+ .set_rate = clk_audio_pll_frac_set_rate,
+};
+
+static const struct clk_ops audio_pll_pad_ops = {
+ .enable = clk_audio_pll_pad_enable,
+ .disable = clk_audio_pll_pad_disable,
+ .recalc_rate = clk_audio_pll_pad_recalc_rate,
+ .round_rate = clk_audio_pll_pad_round_rate,
+ .set_rate = clk_audio_pll_pad_set_rate,
+};
+
+static const struct clk_ops audio_pll_pmc_ops = {
+ .enable = clk_audio_pll_pmc_enable,
+ .disable = clk_audio_pll_pmc_disable,
+ .recalc_rate = clk_audio_pll_pmc_recalc_rate,
+ .round_rate = clk_audio_pll_pmc_round_rate,
+ .set_rate = clk_audio_pll_pmc_set_rate,
+};
+
+static int of_sama5d2_clk_audio_pll_setup(struct device_node *np,
+ struct clk_init_data *init,
+ struct clk_hw *hw,
+ struct regmap **clk_audio_regmap)
+{
+ struct regmap *regmap;
+ const char *parent_names[1];
+ int ret;
+
+ regmap = syscon_node_to_regmap(of_get_parent(np));
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ init->name = np->name;
+ of_clk_parent_fill(np, parent_names, 1);
+ init->parent_names = parent_names;
+ init->num_parents = 1;
+
+ hw->init = init;
+ *clk_audio_regmap = regmap;
+
+ ret = clk_hw_register(NULL, hw);
+ if (ret)
+ return ret;
+
+ return of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
+}
+
+static void __init of_sama5d2_clk_audio_pll_frac_setup(struct device_node *np)
+{
+ struct clk_audio_frac *frac_ck;
+ struct clk_init_data init = {};
+
+ frac_ck = kzalloc(sizeof(*frac_ck), GFP_KERNEL);
+ if (!frac_ck)
+ return;
+
+ init.ops = &audio_pll_frac_ops;
+ init.flags = CLK_SET_RATE_GATE;
+
+ if (of_sama5d2_clk_audio_pll_setup(np, &init, &frac_ck->hw,
+ &frac_ck->regmap))
+ kfree(frac_ck);
+}
+
+static void __init of_sama5d2_clk_audio_pll_pad_setup(struct device_node *np)
+{
+ struct clk_audio_pad *apad_ck;
+ struct clk_init_data init = {};
+
+ apad_ck = kzalloc(sizeof(*apad_ck), GFP_KERNEL);
+ if (!apad_ck)
+ return;
+
+ init.ops = &audio_pll_pad_ops;
+ init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE |
+ CLK_SET_RATE_PARENT;
+
+ if (of_sama5d2_clk_audio_pll_setup(np, &init, &apad_ck->hw,
+ &apad_ck->regmap))
+ kfree(apad_ck);
+}
+
+static void __init of_sama5d2_clk_audio_pll_pmc_setup(struct device_node *np)
+{
+ struct clk_audio_pad *apmc_ck;
+ struct clk_init_data init = {};
+
+ apmc_ck = kzalloc(sizeof(*apmc_ck), GFP_KERNEL);
+ if (!apmc_ck)
+ return;
+
+ init.ops = &audio_pll_pmc_ops;
+ init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE |
+ CLK_SET_RATE_PARENT;
+
+ if (of_sama5d2_clk_audio_pll_setup(np, &init, &apmc_ck->hw,
+ &apmc_ck->regmap))
+ kfree(apmc_ck);
+}
+
+CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_frac_setup,
+ "atmel,sama5d2-clk-audio-pll-frac",
+ of_sama5d2_clk_audio_pll_frac_setup);
+CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_pad_setup,
+ "atmel,sama5d2-clk-audio-pll-pad",
+ of_sama5d2_clk_audio_pll_pad_setup);
+CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_pmc_setup,
+ "atmel,sama5d2-clk-audio-pll-pmc",
+ of_sama5d2_clk_audio_pll_pmc_setup);
#define GENERATED_SOURCE_MAX 6
#define GENERATED_MAX_DIV 255
+#define GCK_ID_SSC0 43
+#define GCK_ID_SSC1 44
+#define GCK_ID_I2S0 54
+#define GCK_ID_I2S1 55
+#define GCK_ID_CLASSD 59
+#define GCK_INDEX_DT_AUDIO_PLL 5
+
struct clk_generated {
struct clk_hw hw;
struct regmap *regmap;
u32 id;
u32 gckdiv;
u8 parent_id;
+ bool audio_pll_allowed;
};
#define to_clk_generated(hw) \
return DIV_ROUND_CLOSEST(parent_rate, gck->gckdiv + 1);
}
+static void clk_generated_best_diff(struct clk_rate_request *req,
+ struct clk_hw *parent,
+ unsigned long parent_rate, u32 div,
+ int *best_diff, long *best_rate)
+{
+ unsigned long tmp_rate;
+ int tmp_diff;
+
+ if (!div)
+ tmp_rate = parent_rate;
+ else
+ tmp_rate = parent_rate / div;
+ tmp_diff = abs(req->rate - tmp_rate);
+
+ if (*best_diff < 0 || *best_diff > tmp_diff) {
+ *best_rate = tmp_rate;
+ *best_diff = tmp_diff;
+ req->best_parent_rate = parent_rate;
+ req->best_parent_hw = parent;
+ }
+}
+
static int clk_generated_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
struct clk_generated *gck = to_clk_generated(hw);
struct clk_hw *parent = NULL;
+ struct clk_rate_request req_parent = *req;
long best_rate = -EINVAL;
- unsigned long tmp_rate, min_rate;
+ unsigned long min_rate, parent_rate;
int best_diff = -1;
- int tmp_diff;
int i;
+ u32 div;
- for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
- u32 div;
- unsigned long parent_rate;
-
+ for (i = 0; i < clk_hw_get_num_parents(hw) - 1; i++) {
parent = clk_hw_get_parent_by_index(hw, i);
if (!parent)
continue;
(gck->range.max && min_rate > gck->range.max))
continue;
- for (div = 1; div < GENERATED_MAX_DIV + 2; div++) {
- tmp_rate = DIV_ROUND_CLOSEST(parent_rate, div);
- tmp_diff = abs(req->rate - tmp_rate);
+ div = DIV_ROUND_CLOSEST(parent_rate, req->rate);
- if (best_diff < 0 || best_diff > tmp_diff) {
- best_rate = tmp_rate;
- best_diff = tmp_diff;
- req->best_parent_rate = parent_rate;
- req->best_parent_hw = parent;
- }
+ clk_generated_best_diff(req, parent, parent_rate, div,
+ &best_diff, &best_rate);
- if (!best_diff || tmp_rate < req->rate)
- break;
- }
+ if (!best_diff)
+ break;
+ }
+
+ /*
+ * The audio_pll rate can be modified, unlike the five others clocks
+ * that should never be altered.
+ * The audio_pll can technically be used by multiple consumers. However,
+ * with the rate locking, the first consumer to enable to clock will be
+ * the one definitely setting the rate of the clock.
+ * Since audio IPs are most likely to request the same rate, we enforce
+ * that the only clks able to modify gck rate are those of audio IPs.
+ */
+
+ if (!gck->audio_pll_allowed)
+ goto end;
+
+ parent = clk_hw_get_parent_by_index(hw, GCK_INDEX_DT_AUDIO_PLL);
+ if (!parent)
+ goto end;
+
+ for (div = 1; div < GENERATED_MAX_DIV + 2; div++) {
+ req_parent.rate = req->rate * div;
+ __clk_determine_rate(parent, &req_parent);
+ clk_generated_best_diff(req, parent, req_parent.rate, div,
+ &best_diff, &best_rate);
if (!best_diff)
break;
}
+end:
pr_debug("GCLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
__func__, best_rate,
__clk_get_name((req->best_parent_hw)->clk),
init.ops = &generated_ops;
init.parent_names = parent_names;
init.num_parents = num_parents;
- init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
+ init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE |
+ CLK_SET_RATE_PARENT;
gck->id = id;
gck->hw.init = &init;
struct device_node *gcknp;
struct clk_range range = CLK_RANGE(0, 0);
struct regmap *regmap;
+ struct clk_generated *gck;
num_parents = of_clk_get_parent_count(np);
if (num_parents == 0 || num_parents > GENERATED_SOURCE_MAX)
hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, name,
parent_names, num_parents,
id, &range);
+
+ gck = to_clk_generated(hw);
+
+ if (of_device_is_compatible(np,
+ "atmel,sama5d2-clk-generated")) {
+ if (gck->id == GCK_ID_SSC0 || gck->id == GCK_ID_SSC1 ||
+ gck->id == GCK_ID_I2S0 || gck->id == GCK_ID_I2S1 ||
+ gck->id == GCK_ID_CLASSD)
+ gck->audio_pll_allowed = true;
+ else
+ gck->audio_pll_allowed = false;
+ } else {
+ gck->audio_pll_allowed = false;
+ }
+
if (IS_ERR(hw))
continue;
obj-y += i2s_pll_clock.o
+obj-y += pll_clock.o
--- /dev/null
+/*
+ * Synopsys AXS10X SDP Generic PLL clock driver
+ *
+ * Copyright (C) 2017 Synopsys
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+/* PLL registers addresses */
+#define PLL_REG_IDIV 0x0
+#define PLL_REG_FBDIV 0x4
+#define PLL_REG_ODIV 0x8
+
+/*
+ * Bit fields of the PLL IDIV/FBDIV/ODIV registers:
+ * ________________________________________________________________________
+ * |31 15| 14 | 13 | 12 |11 6|5 0|
+ * |-------RESRVED------|-NOUPDATE-|-BYPASS-|-EDGE-|--HIGHTIME--|--LOWTIME--|
+ * |____________________|__________|________|______|____________|___________|
+ *
+ * Following macros determine the way of access to these registers
+ * They should be set up only using the macros.
+ * reg should be an u32 variable.
+ */
+
+#define PLL_REG_GET_LOW(reg) \
+ (((reg) & (0x3F << 0)) >> 0)
+#define PLL_REG_GET_HIGH(reg) \
+ (((reg) & (0x3F << 6)) >> 6)
+#define PLL_REG_GET_EDGE(reg) \
+ (((reg) & (BIT(12))) ? 1 : 0)
+#define PLL_REG_GET_BYPASS(reg) \
+ (((reg) & (BIT(13))) ? 1 : 0)
+#define PLL_REG_GET_NOUPD(reg) \
+ (((reg) & (BIT(14))) ? 1 : 0)
+#define PLL_REG_GET_PAD(reg) \
+ (((reg) & (0x1FFFF << 15)) >> 15)
+
+#define PLL_REG_SET_LOW(reg, value) \
+ { reg |= (((value) & 0x3F) << 0); }
+#define PLL_REG_SET_HIGH(reg, value) \
+ { reg |= (((value) & 0x3F) << 6); }
+#define PLL_REG_SET_EDGE(reg, value) \
+ { reg |= (((value) & 0x01) << 12); }
+#define PLL_REG_SET_BYPASS(reg, value) \
+ { reg |= (((value) & 0x01) << 13); }
+#define PLL_REG_SET_NOUPD(reg, value) \
+ { reg |= (((value) & 0x01) << 14); }
+#define PLL_REG_SET_PAD(reg, value) \
+ { reg |= (((value) & 0x1FFFF) << 15); }
+
+#define PLL_LOCK BIT(0)
+#define PLL_ERROR BIT(1)
+#define PLL_MAX_LOCK_TIME 100 /* 100 us */
+
+struct axs10x_pll_cfg {
+ u32 rate;
+ u32 idiv;
+ u32 fbdiv;
+ u32 odiv;
+};
+
+static const struct axs10x_pll_cfg arc_pll_cfg[] = {
+ { 33333333, 1, 1, 1 },
+ { 50000000, 1, 30, 20 },
+ { 75000000, 2, 45, 10 },
+ { 90000000, 2, 54, 10 },
+ { 100000000, 1, 30, 10 },
+ { 125000000, 2, 45, 6 },
+ {}
+};
+
+static const struct axs10x_pll_cfg pgu_pll_cfg[] = {
+ { 25200000, 1, 84, 90 },
+ { 50000000, 1, 100, 54 },
+ { 74250000, 1, 44, 16 },
+ {}
+};
+
+struct axs10x_pll_clk {
+ struct clk_hw hw;
+ void __iomem *base;
+ void __iomem *lock;
+ const struct axs10x_pll_cfg *pll_cfg;
+ struct device *dev;
+};
+
+static inline void axs10x_pll_write(struct axs10x_pll_clk *clk, u32 reg,
+ u32 val)
+{
+ iowrite32(val, clk->base + reg);
+}
+
+static inline u32 axs10x_pll_read(struct axs10x_pll_clk *clk, u32 reg)
+{
+ return ioread32(clk->base + reg);
+}
+
+static inline struct axs10x_pll_clk *to_axs10x_pll_clk(struct clk_hw *hw)
+{
+ return container_of(hw, struct axs10x_pll_clk, hw);
+}
+
+static inline u32 axs10x_div_get_value(u32 reg)
+{
+ if (PLL_REG_GET_BYPASS(reg))
+ return 1;
+
+ return PLL_REG_GET_HIGH(reg) + PLL_REG_GET_LOW(reg);
+}
+
+static inline u32 axs10x_encode_div(unsigned int id, int upd)
+{
+ u32 div = 0;
+
+ PLL_REG_SET_LOW(div, (id % 2 == 0) ? id >> 1 : (id >> 1) + 1);
+ PLL_REG_SET_HIGH(div, id >> 1);
+ PLL_REG_SET_EDGE(div, id % 2);
+ PLL_REG_SET_BYPASS(div, id == 1 ? 1 : 0);
+ PLL_REG_SET_NOUPD(div, upd == 0 ? 1 : 0);
+
+ return div;
+}
+
+static unsigned long axs10x_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ u64 rate;
+ u32 idiv, fbdiv, odiv;
+ struct axs10x_pll_clk *clk = to_axs10x_pll_clk(hw);
+
+ idiv = axs10x_div_get_value(axs10x_pll_read(clk, PLL_REG_IDIV));
+ fbdiv = axs10x_div_get_value(axs10x_pll_read(clk, PLL_REG_FBDIV));
+ odiv = axs10x_div_get_value(axs10x_pll_read(clk, PLL_REG_ODIV));
+
+ rate = (u64)parent_rate * fbdiv;
+ do_div(rate, idiv * odiv);
+
+ return rate;
+}
+
+static long axs10x_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ int i;
+ long best_rate;
+ struct axs10x_pll_clk *clk = to_axs10x_pll_clk(hw);
+ const struct axs10x_pll_cfg *pll_cfg = clk->pll_cfg;
+
+ if (pll_cfg[0].rate == 0)
+ return -EINVAL;
+
+ best_rate = pll_cfg[0].rate;
+
+ for (i = 1; pll_cfg[i].rate != 0; i++) {
+ if (abs(rate - pll_cfg[i].rate) < abs(rate - best_rate))
+ best_rate = pll_cfg[i].rate;
+ }
+
+ return best_rate;
+}
+
+static int axs10x_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ int i;
+ struct axs10x_pll_clk *clk = to_axs10x_pll_clk(hw);
+ const struct axs10x_pll_cfg *pll_cfg = clk->pll_cfg;
+
+ for (i = 0; pll_cfg[i].rate != 0; i++) {
+ if (pll_cfg[i].rate == rate) {
+ axs10x_pll_write(clk, PLL_REG_IDIV,
+ axs10x_encode_div(pll_cfg[i].idiv, 0));
+ axs10x_pll_write(clk, PLL_REG_FBDIV,
+ axs10x_encode_div(pll_cfg[i].fbdiv, 0));
+ axs10x_pll_write(clk, PLL_REG_ODIV,
+ axs10x_encode_div(pll_cfg[i].odiv, 1));
+
+ /*
+ * Wait until CGU relocks and check error status.
+ * If after timeout CGU is unlocked yet return error
+ */
+ udelay(PLL_MAX_LOCK_TIME);
+ if (!(ioread32(clk->lock) & PLL_LOCK))
+ return -ETIMEDOUT;
+
+ if (ioread32(clk->lock) & PLL_ERROR)
+ return -EINVAL;
+
+ return 0;
+ }
+ }
+
+ dev_err(clk->dev, "invalid rate=%ld, parent_rate=%ld\n", rate,
+ parent_rate);
+ return -EINVAL;
+}
+
+static const struct clk_ops axs10x_pll_ops = {
+ .recalc_rate = axs10x_pll_recalc_rate,
+ .round_rate = axs10x_pll_round_rate,
+ .set_rate = axs10x_pll_set_rate,
+};
+
+static int axs10x_pll_clk_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const char *parent_name;
+ struct axs10x_pll_clk *pll_clk;
+ struct resource *mem;
+ struct clk_init_data init = { };
+ int ret;
+
+ pll_clk = devm_kzalloc(dev, sizeof(*pll_clk), GFP_KERNEL);
+ if (!pll_clk)
+ return -ENOMEM;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ pll_clk->base = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(pll_clk->base))
+ return PTR_ERR(pll_clk->base);
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ pll_clk->lock = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(pll_clk->lock))
+ return PTR_ERR(pll_clk->lock);
+
+ init.name = dev->of_node->name;
+ init.ops = &axs10x_pll_ops;
+ parent_name = of_clk_get_parent_name(dev->of_node, 0);
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+ pll_clk->hw.init = &init;
+ pll_clk->dev = dev;
+ pll_clk->pll_cfg = of_device_get_match_data(dev);
+
+ if (!pll_clk->pll_cfg) {
+ dev_err(dev, "No OF match data provided\n");
+ return -EINVAL;
+ }
+
+ ret = devm_clk_hw_register(dev, &pll_clk->hw);
+ if (ret) {
+ dev_err(dev, "failed to register %s clock\n", init.name);
+ return ret;
+ }
+
+ return of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get,
+ &pll_clk->hw);
+}
+
+static int axs10x_pll_clk_remove(struct platform_device *pdev)
+{
+ of_clk_del_provider(pdev->dev.of_node);
+ return 0;
+}
+
+static void __init of_axs10x_pll_clk_setup(struct device_node *node)
+{
+ const char *parent_name;
+ struct axs10x_pll_clk *pll_clk;
+ struct clk_init_data init = { };
+ int ret;
+
+ pll_clk = kzalloc(sizeof(*pll_clk), GFP_KERNEL);
+ if (!pll_clk)
+ return;
+
+ pll_clk->base = of_iomap(node, 0);
+ if (!pll_clk->base) {
+ pr_err("failed to map pll div registers\n");
+ goto err_free_pll_clk;
+ }
+
+ pll_clk->lock = of_iomap(node, 1);
+ if (!pll_clk->lock) {
+ pr_err("failed to map pll lock register\n");
+ goto err_unmap_base;
+ }
+
+ init.name = node->name;
+ init.ops = &axs10x_pll_ops;
+ parent_name = of_clk_get_parent_name(node, 0);
+ init.parent_names = &parent_name;
+ init.num_parents = parent_name ? 1 : 0;
+ pll_clk->hw.init = &init;
+ pll_clk->pll_cfg = arc_pll_cfg;
+
+ ret = clk_hw_register(NULL, &pll_clk->hw);
+ if (ret) {
+ pr_err("failed to register %s clock\n", node->name);
+ goto err_unmap_lock;
+ }
+
+ ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll_clk->hw);
+ if (ret) {
+ pr_err("failed to add hw provider for %s clock\n", node->name);
+ goto err_unregister_clk;
+ }
+
+ return;
+
+err_unregister_clk:
+ clk_hw_unregister(&pll_clk->hw);
+err_unmap_lock:
+ iounmap(pll_clk->lock);
+err_unmap_base:
+ iounmap(pll_clk->base);
+err_free_pll_clk:
+ kfree(pll_clk);
+}
+CLK_OF_DECLARE(axs10x_pll_clock, "snps,axs10x-arc-pll-clock",
+ of_axs10x_pll_clk_setup);
+
+static const struct of_device_id axs10x_pll_clk_id[] = {
+ { .compatible = "snps,axs10x-pgu-pll-clock", .data = &pgu_pll_cfg},
+ { }
+};
+MODULE_DEVICE_TABLE(of, axs10x_pll_clk_id);
+
+static struct platform_driver axs10x_pll_clk_driver = {
+ .driver = {
+ .name = "axs10x-pll-clock",
+ .of_match_table = axs10x_pll_clk_id,
+ },
+ .probe = axs10x_pll_clk_probe,
+ .remove = axs10x_pll_clk_remove,
+};
+builtin_platform_driver(axs10x_pll_clk_driver);
+
+MODULE_AUTHOR("Vlad Zakharov <vzakhar@synopsys.com>");
+MODULE_DESCRIPTION("Synopsys AXS10X SDP Generic PLL Clock Driver");
+MODULE_LICENSE("GPL v2");
if (!IS_ERR(hws[n]))
continue;
- pr_err("%s: Unable to register leaf clock %d\n",
- np->full_name, n);
+ pr_err("%pOF: Unable to register leaf clock %d\n", np, n);
goto bg2_fail;
}
gbase = of_iomap(parent_np, 0);
if (!gbase) {
- pr_err("%s: Unable to map global base\n", np->full_name);
+ pr_err("%pOF: Unable to map global base\n", np);
return;
}
/* BG2Q CPU PLL is not part of global registers */
cpupll_base = of_iomap(parent_np, 1);
if (!cpupll_base) {
- pr_err("%s: Unable to map cpupll base\n", np->full_name);
+ pr_err("%pOF: Unable to map cpupll base\n", np);
iounmap(gbase);
return;
}
if (!IS_ERR(hws[n]))
continue;
- pr_err("%s: Unable to register leaf clock %d\n",
- np->full_name, n);
+ pr_err("%pOF: Unable to register leaf clock %d\n", np, n);
goto bg2q_fail;
}
if (!IS_ERR(hws[n]))
continue;
- pr_err("%s: Unable to register leaf clock %d\n",
- np->full_name, n);
+ pr_err("%pOF: Unable to register leaf clock %d\n",
+ np, n);
goto fail;
}
num_parents = of_count_phandle_with_args(node, "assigned-clock-parents",
"#clock-cells");
if (num_parents == -EINVAL)
- pr_err("clk: invalid value of clock-parents property at %s\n",
- node->full_name);
+ pr_err("clk: invalid value of clock-parents property at %pOF\n",
+ node);
for (index = 0; index < num_parents; index++) {
rc = of_parse_phandle_with_args(node, "assigned-clock-parents",
pclk = of_clk_get_from_provider(&clkspec);
if (IS_ERR(pclk)) {
if (PTR_ERR(pclk) != -EPROBE_DEFER)
- pr_warn("clk: couldn't get parent clock %d for %s\n",
- index, node->full_name);
+ pr_warn("clk: couldn't get parent clock %d for %pOF\n",
+ index, node);
return PTR_ERR(pclk);
}
clk = of_clk_get_from_provider(&clkspec);
if (IS_ERR(clk)) {
if (PTR_ERR(clk) != -EPROBE_DEFER)
- pr_warn("clk: couldn't get assigned clock %d for %s\n",
- index, node->full_name);
+ pr_warn("clk: couldn't get assigned clock %d for %pOF\n",
+ index, node);
rc = PTR_ERR(clk);
goto err;
}
clk = of_clk_get_from_provider(&clkspec);
if (IS_ERR(clk)) {
if (PTR_ERR(clk) != -EPROBE_DEFER)
- pr_warn("clk: couldn't get clock %d for %s\n",
- index, node->full_name);
+ pr_warn("clk: couldn't get clock %d for %pOF\n",
+ index, node);
return PTR_ERR(clk);
}
return __cs2000_set_rate(priv, ch, rate, parent_rate);
}
+static int cs2000_set_saved_rate(struct cs2000_priv *priv)
+{
+ int ch = 0; /* it uses ch0 only at this point */
+
+ return __cs2000_set_rate(priv, ch,
+ priv->saved_rate,
+ priv->saved_parent_rate);
+}
+
static int cs2000_enable(struct clk_hw *hw)
{
struct cs2000_priv *priv = hw_to_priv(hw);
static int cs2000_resume(struct device *dev)
{
struct cs2000_priv *priv = dev_get_drvdata(dev);
- int ch = 0; /* it uses ch0 only at this point */
- return __cs2000_set_rate(priv, ch,
- priv->saved_rate,
- priv->saved_parent_rate);
+ return cs2000_set_saved_rate(priv);
}
static const struct dev_pm_ops cs2000_pm_ops = {
unsigned long parent_rate)
{
struct clk_divider *divider = to_clk_divider(hw);
- unsigned int value;
+ int value;
unsigned long flags = 0;
u32 val;
value = divider_get_val(rate, parent_rate, divider->table,
divider->width, divider->flags);
+ if (value < 0)
+ return value;
if (divider->lock)
spin_lock_irqsave(divider->lock, flags);
val = clk_readl(divider->reg);
val &= ~(div_mask(divider->width) << divider->shift);
}
- val |= value << divider->shift;
+ val |= (u32)value << divider->shift;
clk_writel(val, divider->reg);
if (divider->lock)
return ret;
}
-static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *parent_rate)
+static void clk_fd_general_approximation(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate,
+ unsigned long *m, unsigned long *n)
{
struct clk_fractional_divider *fd = to_clk_fd(hw);
unsigned long scale;
- unsigned long m, n;
- u64 ret;
-
- if (!rate || rate >= *parent_rate)
- return *parent_rate;
/*
* Get rate closer to *parent_rate to guarantee there is no overflow
rational_best_approximation(rate, *parent_rate,
GENMASK(fd->mwidth - 1, 0), GENMASK(fd->nwidth - 1, 0),
- &m, &n);
+ m, n);
+}
+
+static long clk_fd_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct clk_fractional_divider *fd = to_clk_fd(hw);
+ unsigned long m, n;
+ u64 ret;
+
+ if (!rate || rate >= *parent_rate)
+ return *parent_rate;
+
+ if (fd->approximation)
+ fd->approximation(hw, rate, parent_rate, &m, &n);
+ else
+ clk_fd_general_approximation(hw, rate, parent_rate, &m, &n);
ret = (u64)*parent_rate * m;
do_div(ret, n);
clk_gate_endisable(hw, 0);
}
-static int clk_gate_is_enabled(struct clk_hw *hw)
+int clk_gate_is_enabled(struct clk_hw *hw)
{
u32 reg;
struct clk_gate *gate = to_clk_gate(hw);
return reg ? 1 : 0;
}
+EXPORT_SYMBOL_GPL(clk_gate_is_enabled);
const struct clk_ops clk_gate_ops = {
.enable = clk_gate_enable,
#define GEMINI_GLOBAL_MISC_CONTROL 0x30
#define PCI_CLK_66MHZ BIT(18)
-#define PCI_CLK_OE BIT(17)
#define GEMINI_GLOBAL_CLOCK_CONTROL 0x34
#define PCI_CLKRUN_EN BIT(16)
regmap_update_bits(pciclk->map, GEMINI_GLOBAL_CLOCK_CONTROL,
0, PCI_CLKRUN_EN);
- regmap_update_bits(pciclk->map,
- GEMINI_GLOBAL_MISC_CONTROL,
- 0, PCI_CLK_OE);
return 0;
}
{
struct clk_gemini_pci *pciclk = to_pciclk(hw);
- regmap_update_bits(pciclk->map,
- GEMINI_GLOBAL_MISC_CONTROL,
- PCI_CLK_OE, 0);
regmap_update_bits(pciclk->map, GEMINI_GLOBAL_CLOCK_CONTROL,
PCI_CLKRUN_EN, 0);
}
--- /dev/null
+/*
+ * Synopsys HSDK SDP Generic PLL clock driver
+ *
+ * Copyright (C) 2017 Synopsys
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#define CGU_PLL_CTRL 0x000 /* ARC PLL control register */
+#define CGU_PLL_STATUS 0x004 /* ARC PLL status register */
+#define CGU_PLL_FMEAS 0x008 /* ARC PLL frequency measurement register */
+#define CGU_PLL_MON 0x00C /* ARC PLL monitor register */
+
+#define CGU_PLL_CTRL_ODIV_SHIFT 2
+#define CGU_PLL_CTRL_IDIV_SHIFT 4
+#define CGU_PLL_CTRL_FBDIV_SHIFT 9
+#define CGU_PLL_CTRL_BAND_SHIFT 20
+
+#define CGU_PLL_CTRL_ODIV_MASK GENMASK(3, CGU_PLL_CTRL_ODIV_SHIFT)
+#define CGU_PLL_CTRL_IDIV_MASK GENMASK(8, CGU_PLL_CTRL_IDIV_SHIFT)
+#define CGU_PLL_CTRL_FBDIV_MASK GENMASK(15, CGU_PLL_CTRL_FBDIV_SHIFT)
+
+#define CGU_PLL_CTRL_PD BIT(0)
+#define CGU_PLL_CTRL_BYPASS BIT(1)
+
+#define CGU_PLL_STATUS_LOCK BIT(0)
+#define CGU_PLL_STATUS_ERR BIT(1)
+
+#define HSDK_PLL_MAX_LOCK_TIME 100 /* 100 us */
+
+#define CGU_PLL_SOURCE_MAX 1
+
+#define CORE_IF_CLK_THRESHOLD_HZ 500000000
+#define CREG_CORE_IF_CLK_DIV_1 0x0
+#define CREG_CORE_IF_CLK_DIV_2 0x1
+
+struct hsdk_pll_cfg {
+ u32 rate;
+ u32 idiv;
+ u32 fbdiv;
+ u32 odiv;
+ u32 band;
+};
+
+static const struct hsdk_pll_cfg asdt_pll_cfg[] = {
+ { 100000000, 0, 11, 3, 0 },
+ { 133000000, 0, 15, 3, 0 },
+ { 200000000, 1, 47, 3, 0 },
+ { 233000000, 1, 27, 2, 0 },
+ { 300000000, 1, 35, 2, 0 },
+ { 333000000, 1, 39, 2, 0 },
+ { 400000000, 1, 47, 2, 0 },
+ { 500000000, 0, 14, 1, 0 },
+ { 600000000, 0, 17, 1, 0 },
+ { 700000000, 0, 20, 1, 0 },
+ { 800000000, 0, 23, 1, 0 },
+ { 900000000, 1, 26, 0, 0 },
+ { 1000000000, 1, 29, 0, 0 },
+ { 1100000000, 1, 32, 0, 0 },
+ { 1200000000, 1, 35, 0, 0 },
+ { 1300000000, 1, 38, 0, 0 },
+ { 1400000000, 1, 41, 0, 0 },
+ { 1500000000, 1, 44, 0, 0 },
+ { 1600000000, 1, 47, 0, 0 },
+ {}
+};
+
+static const struct hsdk_pll_cfg hdmi_pll_cfg[] = {
+ { 297000000, 0, 21, 2, 0 },
+ { 540000000, 0, 19, 1, 0 },
+ { 594000000, 0, 21, 1, 0 },
+ {}
+};
+
+struct hsdk_pll_clk {
+ struct clk_hw hw;
+ void __iomem *regs;
+ void __iomem *spec_regs;
+ const struct hsdk_pll_devdata *pll_devdata;
+ struct device *dev;
+};
+
+struct hsdk_pll_devdata {
+ const struct hsdk_pll_cfg *pll_cfg;
+ int (*update_rate)(struct hsdk_pll_clk *clk, unsigned long rate,
+ const struct hsdk_pll_cfg *cfg);
+};
+
+static int hsdk_pll_core_update_rate(struct hsdk_pll_clk *, unsigned long,
+ const struct hsdk_pll_cfg *);
+static int hsdk_pll_comm_update_rate(struct hsdk_pll_clk *, unsigned long,
+ const struct hsdk_pll_cfg *);
+
+static const struct hsdk_pll_devdata core_pll_devdata = {
+ .pll_cfg = asdt_pll_cfg,
+ .update_rate = hsdk_pll_core_update_rate,
+};
+
+static const struct hsdk_pll_devdata sdt_pll_devdata = {
+ .pll_cfg = asdt_pll_cfg,
+ .update_rate = hsdk_pll_comm_update_rate,
+};
+
+static const struct hsdk_pll_devdata hdmi_pll_devdata = {
+ .pll_cfg = hdmi_pll_cfg,
+ .update_rate = hsdk_pll_comm_update_rate,
+};
+
+static inline void hsdk_pll_write(struct hsdk_pll_clk *clk, u32 reg, u32 val)
+{
+ iowrite32(val, clk->regs + reg);
+}
+
+static inline u32 hsdk_pll_read(struct hsdk_pll_clk *clk, u32 reg)
+{
+ return ioread32(clk->regs + reg);
+}
+
+static inline void hsdk_pll_set_cfg(struct hsdk_pll_clk *clk,
+ const struct hsdk_pll_cfg *cfg)
+{
+ u32 val = 0;
+
+ /* Powerdown and Bypass bits should be cleared */
+ val |= cfg->idiv << CGU_PLL_CTRL_IDIV_SHIFT;
+ val |= cfg->fbdiv << CGU_PLL_CTRL_FBDIV_SHIFT;
+ val |= cfg->odiv << CGU_PLL_CTRL_ODIV_SHIFT;
+ val |= cfg->band << CGU_PLL_CTRL_BAND_SHIFT;
+
+ dev_dbg(clk->dev, "write configurarion: %#x\n", val);
+
+ hsdk_pll_write(clk, CGU_PLL_CTRL, val);
+}
+
+static inline bool hsdk_pll_is_locked(struct hsdk_pll_clk *clk)
+{
+ return !!(hsdk_pll_read(clk, CGU_PLL_STATUS) & CGU_PLL_STATUS_LOCK);
+}
+
+static inline bool hsdk_pll_is_err(struct hsdk_pll_clk *clk)
+{
+ return !!(hsdk_pll_read(clk, CGU_PLL_STATUS) & CGU_PLL_STATUS_ERR);
+}
+
+static inline struct hsdk_pll_clk *to_hsdk_pll_clk(struct clk_hw *hw)
+{
+ return container_of(hw, struct hsdk_pll_clk, hw);
+}
+
+static unsigned long hsdk_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ u32 val;
+ u64 rate;
+ u32 idiv, fbdiv, odiv;
+ struct hsdk_pll_clk *clk = to_hsdk_pll_clk(hw);
+
+ val = hsdk_pll_read(clk, CGU_PLL_CTRL);
+
+ dev_dbg(clk->dev, "current configurarion: %#x\n", val);
+
+ /* Check if PLL is disabled */
+ if (val & CGU_PLL_CTRL_PD)
+ return 0;
+
+ /* Check if PLL is bypassed */
+ if (val & CGU_PLL_CTRL_BYPASS)
+ return parent_rate;
+
+ /* input divider = reg.idiv + 1 */
+ idiv = 1 + ((val & CGU_PLL_CTRL_IDIV_MASK) >> CGU_PLL_CTRL_IDIV_SHIFT);
+ /* fb divider = 2*(reg.fbdiv + 1) */
+ fbdiv = 2 * (1 + ((val & CGU_PLL_CTRL_FBDIV_MASK) >> CGU_PLL_CTRL_FBDIV_SHIFT));
+ /* output divider = 2^(reg.odiv) */
+ odiv = 1 << ((val & CGU_PLL_CTRL_ODIV_MASK) >> CGU_PLL_CTRL_ODIV_SHIFT);
+
+ rate = (u64)parent_rate * fbdiv;
+ do_div(rate, idiv * odiv);
+
+ return rate;
+}
+
+static long hsdk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ int i;
+ unsigned long best_rate;
+ struct hsdk_pll_clk *clk = to_hsdk_pll_clk(hw);
+ const struct hsdk_pll_cfg *pll_cfg = clk->pll_devdata->pll_cfg;
+
+ if (pll_cfg[0].rate == 0)
+ return -EINVAL;
+
+ best_rate = pll_cfg[0].rate;
+
+ for (i = 1; pll_cfg[i].rate != 0; i++) {
+ if (abs(rate - pll_cfg[i].rate) < abs(rate - best_rate))
+ best_rate = pll_cfg[i].rate;
+ }
+
+ dev_dbg(clk->dev, "chosen best rate: %lu\n", best_rate);
+
+ return best_rate;
+}
+
+static int hsdk_pll_comm_update_rate(struct hsdk_pll_clk *clk,
+ unsigned long rate,
+ const struct hsdk_pll_cfg *cfg)
+{
+ hsdk_pll_set_cfg(clk, cfg);
+
+ /*
+ * Wait until CGU relocks and check error status.
+ * If after timeout CGU is unlocked yet return error.
+ */
+ udelay(HSDK_PLL_MAX_LOCK_TIME);
+ if (!hsdk_pll_is_locked(clk))
+ return -ETIMEDOUT;
+
+ if (hsdk_pll_is_err(clk))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int hsdk_pll_core_update_rate(struct hsdk_pll_clk *clk,
+ unsigned long rate,
+ const struct hsdk_pll_cfg *cfg)
+{
+ /*
+ * When core clock exceeds 500MHz, the divider for the interface
+ * clock must be programmed to div-by-2.
+ */
+ if (rate > CORE_IF_CLK_THRESHOLD_HZ)
+ iowrite32(CREG_CORE_IF_CLK_DIV_2, clk->spec_regs);
+
+ hsdk_pll_set_cfg(clk, cfg);
+
+ /*
+ * Wait until CGU relocks and check error status.
+ * If after timeout CGU is unlocked yet return error.
+ */
+ udelay(HSDK_PLL_MAX_LOCK_TIME);
+ if (!hsdk_pll_is_locked(clk))
+ return -ETIMEDOUT;
+
+ if (hsdk_pll_is_err(clk))
+ return -EINVAL;
+
+ /*
+ * Program divider to div-by-1 if we succesfuly set core clock below
+ * 500MHz threshold.
+ */
+ if (rate <= CORE_IF_CLK_THRESHOLD_HZ)
+ iowrite32(CREG_CORE_IF_CLK_DIV_1, clk->spec_regs);
+
+ return 0;
+}
+
+static int hsdk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ int i;
+ struct hsdk_pll_clk *clk = to_hsdk_pll_clk(hw);
+ const struct hsdk_pll_cfg *pll_cfg = clk->pll_devdata->pll_cfg;
+
+ for (i = 0; pll_cfg[i].rate != 0; i++) {
+ if (pll_cfg[i].rate == rate) {
+ return clk->pll_devdata->update_rate(clk, rate,
+ &pll_cfg[i]);
+ }
+ }
+
+ dev_err(clk->dev, "invalid rate=%ld, parent_rate=%ld\n", rate,
+ parent_rate);
+
+ return -EINVAL;
+}
+
+static const struct clk_ops hsdk_pll_ops = {
+ .recalc_rate = hsdk_pll_recalc_rate,
+ .round_rate = hsdk_pll_round_rate,
+ .set_rate = hsdk_pll_set_rate,
+};
+
+static int hsdk_pll_clk_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *mem;
+ const char *parent_name;
+ unsigned int num_parents;
+ struct hsdk_pll_clk *pll_clk;
+ struct clk_init_data init = { };
+ struct device *dev = &pdev->dev;
+
+ pll_clk = devm_kzalloc(dev, sizeof(*pll_clk), GFP_KERNEL);
+ if (!pll_clk)
+ return -ENOMEM;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ pll_clk->regs = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(pll_clk->regs))
+ return PTR_ERR(pll_clk->regs);
+
+ init.name = dev->of_node->name;
+ init.ops = &hsdk_pll_ops;
+ parent_name = of_clk_get_parent_name(dev->of_node, 0);
+ init.parent_names = &parent_name;
+ num_parents = of_clk_get_parent_count(dev->of_node);
+ if (num_parents == 0 || num_parents > CGU_PLL_SOURCE_MAX) {
+ dev_err(dev, "wrong clock parents number: %u\n", num_parents);
+ return -EINVAL;
+ }
+ init.num_parents = num_parents;
+
+ pll_clk->hw.init = &init;
+ pll_clk->dev = dev;
+ pll_clk->pll_devdata = of_device_get_match_data(dev);
+
+ if (!pll_clk->pll_devdata) {
+ dev_err(dev, "No OF match data provided\n");
+ return -EINVAL;
+ }
+
+ ret = devm_clk_hw_register(dev, &pll_clk->hw);
+ if (ret) {
+ dev_err(dev, "failed to register %s clock\n", init.name);
+ return ret;
+ }
+
+ return of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get,
+ &pll_clk->hw);
+}
+
+static int hsdk_pll_clk_remove(struct platform_device *pdev)
+{
+ of_clk_del_provider(pdev->dev.of_node);
+ return 0;
+}
+
+static void __init of_hsdk_pll_clk_setup(struct device_node *node)
+{
+ int ret;
+ const char *parent_name;
+ unsigned int num_parents;
+ struct hsdk_pll_clk *pll_clk;
+ struct clk_init_data init = { };
+
+ pll_clk = kzalloc(sizeof(*pll_clk), GFP_KERNEL);
+ if (!pll_clk)
+ return;
+
+ pll_clk->regs = of_iomap(node, 0);
+ if (!pll_clk->regs) {
+ pr_err("failed to map pll registers\n");
+ goto err_free_pll_clk;
+ }
+
+ pll_clk->spec_regs = of_iomap(node, 1);
+ if (!pll_clk->spec_regs) {
+ pr_err("failed to map pll registers\n");
+ goto err_unmap_comm_regs;
+ }
+
+ init.name = node->name;
+ init.ops = &hsdk_pll_ops;
+ parent_name = of_clk_get_parent_name(node, 0);
+ init.parent_names = &parent_name;
+ num_parents = of_clk_get_parent_count(node);
+ if (num_parents > CGU_PLL_SOURCE_MAX) {
+ pr_err("too much clock parents: %u\n", num_parents);
+ goto err_unmap_spec_regs;
+ }
+ init.num_parents = num_parents;
+
+ pll_clk->hw.init = &init;
+ pll_clk->pll_devdata = &core_pll_devdata;
+
+ ret = clk_hw_register(NULL, &pll_clk->hw);
+ if (ret) {
+ pr_err("failed to register %s clock\n", node->name);
+ goto err_unmap_spec_regs;
+ }
+
+ ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll_clk->hw);
+ if (ret) {
+ pr_err("failed to add hw provider for %s clock\n", node->name);
+ goto err_unmap_spec_regs;
+ }
+
+ return;
+
+err_unmap_spec_regs:
+ iounmap(pll_clk->spec_regs);
+err_unmap_comm_regs:
+ iounmap(pll_clk->regs);
+err_free_pll_clk:
+ kfree(pll_clk);
+}
+
+/* Core PLL needed early for ARC cpus timers */
+CLK_OF_DECLARE(hsdk_pll_clock, "snps,hsdk-core-pll-clock",
+of_hsdk_pll_clk_setup);
+
+static const struct of_device_id hsdk_pll_clk_id[] = {
+ { .compatible = "snps,hsdk-gp-pll-clock", .data = &sdt_pll_devdata},
+ { .compatible = "snps,hsdk-hdmi-pll-clock", .data = &hdmi_pll_devdata},
+ { }
+};
+
+static struct platform_driver hsdk_pll_clk_driver = {
+ .driver = {
+ .name = "hsdk-gp-pll-clock",
+ .of_match_table = hsdk_pll_clk_id,
+ },
+ .probe = hsdk_pll_clk_probe,
+ .remove = hsdk_pll_clk_remove,
+};
+builtin_platform_driver(hsdk_pll_clk_driver);
+++ /dev/null
-/*
- * Copyright (C) 2013-2015 FUJITSU SEMICONDUCTOR LIMITED
- * Copyright (C) 2015 Linaro Ltd.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/clkdev.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/cpu.h>
-#include <linux/clk-provider.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/topology.h>
-#include <linux/mailbox_client.h>
-#include <linux/platform_device.h>
-
-#include <soc/mb86s7x/scb_mhu.h>
-
-#define to_crg_clk(p) container_of(p, struct crg_clk, hw)
-#define to_clc_clk(p) container_of(p, struct cl_clk, hw)
-
-struct mb86s7x_peri_clk {
- u32 payload_size;
- u32 cntrlr;
- u32 domain;
- u32 port;
- u32 en;
- u64 frequency;
-} __packed __aligned(4);
-
-struct hack_rate {
- unsigned clk_id;
- unsigned long rate;
- int gated;
-};
-
-struct crg_clk {
- struct clk_hw hw;
- u8 cntrlr, domain, port;
-};
-
-static int crg_gate_control(struct clk_hw *hw, int en)
-{
- struct crg_clk *crgclk = to_crg_clk(hw);
- struct mb86s7x_peri_clk cmd;
- int ret;
-
- cmd.payload_size = sizeof(cmd);
- cmd.cntrlr = crgclk->cntrlr;
- cmd.domain = crgclk->domain;
- cmd.port = crgclk->port;
- cmd.en = en;
-
- /* Port is UngatedCLK */
- if (cmd.port == 8)
- return en ? 0 : -EINVAL;
-
- pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u En-%u}\n",
- __func__, __LINE__, cmd.cntrlr,
- cmd.domain, cmd.port, cmd.en);
-
- ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
- &cmd, sizeof(cmd));
- if (ret < 0) {
- pr_err("%s:%d failed!\n", __func__, __LINE__);
- return ret;
- }
-
- pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u En-%u}\n",
- __func__, __LINE__, cmd.cntrlr,
- cmd.domain, cmd.port, cmd.en);
-
- /* If the request was rejected */
- if (cmd.en != en)
- ret = -EINVAL;
- else
- ret = 0;
-
- return ret;
-}
-
-static int crg_port_prepare(struct clk_hw *hw)
-{
- return crg_gate_control(hw, 1);
-}
-
-static void crg_port_unprepare(struct clk_hw *hw)
-{
- crg_gate_control(hw, 0);
-}
-
-static int
-crg_rate_control(struct clk_hw *hw, int set, unsigned long *rate)
-{
- struct crg_clk *crgclk = to_crg_clk(hw);
- struct mb86s7x_peri_clk cmd;
- int code, ret;
-
- cmd.payload_size = sizeof(cmd);
- cmd.cntrlr = crgclk->cntrlr;
- cmd.domain = crgclk->domain;
- cmd.port = crgclk->port;
- cmd.frequency = *rate;
-
- if (set) {
- code = CMD_PERI_CLOCK_RATE_SET_REQ;
- pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u Rate-SET %lluHz}\n",
- __func__, __LINE__, cmd.cntrlr,
- cmd.domain, cmd.port, cmd.frequency);
- } else {
- code = CMD_PERI_CLOCK_RATE_GET_REQ;
- pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u Rate-GET}\n",
- __func__, __LINE__, cmd.cntrlr,
- cmd.domain, cmd.port);
- }
-
- ret = mb86s7x_send_packet(code, &cmd, sizeof(cmd));
- if (ret < 0) {
- pr_err("%s:%d failed!\n", __func__, __LINE__);
- return ret;
- }
-
- if (set)
- pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u Rate-SET %lluHz}\n",
- __func__, __LINE__, cmd.cntrlr,
- cmd.domain, cmd.port, cmd.frequency);
- else
- pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u Rate-GOT %lluHz}\n",
- __func__, __LINE__, cmd.cntrlr,
- cmd.domain, cmd.port, cmd.frequency);
-
- *rate = cmd.frequency;
- return 0;
-}
-
-static unsigned long
-crg_port_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
-{
- unsigned long rate;
-
- crg_rate_control(hw, 0, &rate);
-
- return rate;
-}
-
-static long
-crg_port_round_rate(struct clk_hw *hw,
- unsigned long rate, unsigned long *pr)
-{
- return rate;
-}
-
-static int
-crg_port_set_rate(struct clk_hw *hw,
- unsigned long rate, unsigned long parent_rate)
-{
- return crg_rate_control(hw, 1, &rate);
-}
-
-const struct clk_ops crg_port_ops = {
- .prepare = crg_port_prepare,
- .unprepare = crg_port_unprepare,
- .recalc_rate = crg_port_recalc_rate,
- .round_rate = crg_port_round_rate,
- .set_rate = crg_port_set_rate,
-};
-
-struct mb86s70_crg11 {
- struct mutex lock; /* protects CLK populating and searching */
-};
-
-static struct clk *crg11_get(struct of_phandle_args *clkspec, void *data)
-{
- struct mb86s70_crg11 *crg11 = data;
- struct clk_init_data init;
- u32 cntrlr, domain, port;
- struct crg_clk *crgclk;
- struct clk *clk;
- char clkp[20];
-
- if (clkspec->args_count != 3)
- return ERR_PTR(-EINVAL);
-
- cntrlr = clkspec->args[0];
- domain = clkspec->args[1];
- port = clkspec->args[2];
-
- if (port > 7)
- snprintf(clkp, 20, "UngatedCLK%d_%X", cntrlr, domain);
- else
- snprintf(clkp, 20, "CLK%d_%X_%d", cntrlr, domain, port);
-
- mutex_lock(&crg11->lock);
-
- clk = __clk_lookup(clkp);
- if (clk) {
- mutex_unlock(&crg11->lock);
- return clk;
- }
-
- crgclk = kzalloc(sizeof(*crgclk), GFP_KERNEL);
- if (!crgclk) {
- mutex_unlock(&crg11->lock);
- return ERR_PTR(-ENOMEM);
- }
-
- init.name = clkp;
- init.num_parents = 0;
- init.ops = &crg_port_ops;
- init.flags = 0;
- crgclk->hw.init = &init;
- crgclk->cntrlr = cntrlr;
- crgclk->domain = domain;
- crgclk->port = port;
- clk = clk_register(NULL, &crgclk->hw);
- if (IS_ERR(clk))
- pr_err("%s:%d Error!\n", __func__, __LINE__);
- else
- pr_debug("Registered %s\n", clkp);
-
- clk_register_clkdev(clk, clkp, NULL);
- mutex_unlock(&crg11->lock);
- return clk;
-}
-
-static void __init crg_port_init(struct device_node *node)
-{
- struct mb86s70_crg11 *crg11;
-
- crg11 = kzalloc(sizeof(*crg11), GFP_KERNEL);
- if (!crg11)
- return;
-
- mutex_init(&crg11->lock);
-
- of_clk_add_provider(node, crg11_get, crg11);
-}
-CLK_OF_DECLARE(crg11_gate, "fujitsu,mb86s70-crg11", crg_port_init);
-
-struct cl_clk {
- struct clk_hw hw;
- int cluster;
-};
-
-struct mb86s7x_cpu_freq {
- u32 payload_size;
- u32 cluster_class;
- u32 cluster_id;
- u32 cpu_id;
- u64 frequency;
-};
-
-static void mhu_cluster_rate(struct clk_hw *hw, unsigned long *rate, int get)
-{
- struct cl_clk *clc = to_clc_clk(hw);
- struct mb86s7x_cpu_freq cmd;
- int code, ret;
-
- cmd.payload_size = sizeof(cmd);
- cmd.cluster_class = 0;
- cmd.cluster_id = clc->cluster;
- cmd.cpu_id = 0;
- cmd.frequency = *rate;
-
- if (get)
- code = CMD_CPU_CLOCK_RATE_GET_REQ;
- else
- code = CMD_CPU_CLOCK_RATE_SET_REQ;
-
- pr_debug("%s:%d CMD Cl_Class-%u CL_ID-%u CPU_ID-%u Freq-%llu}\n",
- __func__, __LINE__, cmd.cluster_class,
- cmd.cluster_id, cmd.cpu_id, cmd.frequency);
-
- ret = mb86s7x_send_packet(code, &cmd, sizeof(cmd));
- if (ret < 0) {
- pr_err("%s:%d failed!\n", __func__, __LINE__);
- return;
- }
-
- pr_debug("%s:%d REP Cl_Class-%u CL_ID-%u CPU_ID-%u Freq-%llu}\n",
- __func__, __LINE__, cmd.cluster_class,
- cmd.cluster_id, cmd.cpu_id, cmd.frequency);
-
- *rate = cmd.frequency;
-}
-
-static unsigned long
-clc_recalc_rate(struct clk_hw *hw, unsigned long unused)
-{
- unsigned long rate;
-
- mhu_cluster_rate(hw, &rate, 1);
- return rate;
-}
-
-static long
-clc_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *unused)
-{
- return rate;
-}
-
-static int
-clc_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long unused)
-{
- unsigned long res = rate;
-
- mhu_cluster_rate(hw, &res, 0);
-
- return (res == rate) ? 0 : -EINVAL;
-}
-
-static struct clk_ops clk_clc_ops = {
- .recalc_rate = clc_recalc_rate,
- .round_rate = clc_round_rate,
- .set_rate = clc_set_rate,
-};
-
-static struct clk_hw *mb86s7x_clclk_register(struct device *cpu_dev)
-{
- struct clk_init_data init;
- struct cl_clk *clc;
- int ret;
-
- clc = kzalloc(sizeof(*clc), GFP_KERNEL);
- if (!clc)
- return ERR_PTR(-ENOMEM);
-
- clc->hw.init = &init;
- clc->cluster = topology_physical_package_id(cpu_dev->id);
-
- init.name = dev_name(cpu_dev);
- init.ops = &clk_clc_ops;
- init.flags = CLK_GET_RATE_NOCACHE;
- init.num_parents = 0;
-
- ret = devm_clk_hw_register(cpu_dev, &clc->hw);
- if (ret)
- return ERR_PTR(ret);
- return &clc->hw;
-}
-
-static int mb86s7x_clclk_of_init(void)
-{
- int cpu, ret = -ENODEV;
- struct device_node *np;
- struct clk_hw *hw;
-
- np = of_find_compatible_node(NULL, NULL, "fujitsu,mb86s70-scb-1.0");
- if (!np || !of_device_is_available(np))
- goto exit;
-
- for_each_possible_cpu(cpu) {
- struct device *cpu_dev = get_cpu_device(cpu);
-
- if (!cpu_dev) {
- pr_err("failed to get cpu%d device\n", cpu);
- continue;
- }
-
- hw = mb86s7x_clclk_register(cpu_dev);
- if (IS_ERR(hw)) {
- pr_err("failed to register cpu%d clock\n", cpu);
- continue;
- }
- if (clk_hw_register_clkdev(hw, NULL, dev_name(cpu_dev))) {
- pr_err("failed to register cpu%d clock lookup\n", cpu);
- continue;
- }
- pr_debug("registered clk for %s\n", dev_name(cpu_dev));
- }
- ret = 0;
-
- platform_device_register_simple("arm-bL-cpufreq-dt", -1, NULL, 0);
-exit:
- of_node_put(np);
- return ret;
-}
-module_init(mb86s7x_clclk_of_init);
static void __init moxart_of_pll_clk_init(struct device_node *node)
{
- static void __iomem *base;
+ void __iomem *base;
struct clk_hw *hw;
struct clk *ref_clk;
unsigned int mul;
base = of_iomap(node, 0);
if (!base) {
- pr_err("%s: of_iomap failed\n", node->full_name);
+ pr_err("%pOF: of_iomap failed\n", node);
return;
}
ref_clk = of_clk_get(node, 0);
if (IS_ERR(ref_clk)) {
- pr_err("%s: of_clk_get failed\n", node->full_name);
+ pr_err("%pOF: of_clk_get failed\n", node);
return;
}
hw = clk_hw_register_fixed_factor(NULL, name, parent_name, 0, mul, 1);
if (IS_ERR(hw)) {
- pr_err("%s: failed to register clock\n", node->full_name);
+ pr_err("%pOF: failed to register clock\n", node);
return;
}
static void __init moxart_of_apb_clk_init(struct device_node *node)
{
- static void __iomem *base;
+ void __iomem *base;
struct clk_hw *hw;
struct clk *pll_clk;
unsigned int div, val;
base = of_iomap(node, 0);
if (!base) {
- pr_err("%s: of_iomap failed\n", node->full_name);
+ pr_err("%pOF: of_iomap failed\n", node);
return;
}
pll_clk = of_clk_get(node, 0);
if (IS_ERR(pll_clk)) {
- pr_err("%s: of_clk_get failed\n", node->full_name);
+ pr_err("%pOF: of_clk_get failed\n", node);
return;
}
hw = clk_hw_register_fixed_factor(NULL, name, parent_name, 0, 1, div);
if (IS_ERR(hw)) {
- pr_err("%s: failed to register clock\n", node->full_name);
+ pr_err("%pOF: failed to register clock\n", node);
return;
}
#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
#include <linux/fsl/guts.h>
#include <linux/io.h>
#include <linux/kernel.h>
.pll_mask = 0x07,
.flags = CG_PLL_8BIT,
},
+ {
+ .compat = "fsl,ls1088a-clockgen",
+ .cmux_groups = {
+ &clockgen2_cmux_cga12
+ },
+ .cmux_to_group = {
+ 0, 0, -1
+ },
+ .pll_mask = 0x07,
+ .flags = CG_VER3 | CG_LITTLE_ENDIAN,
+ },
{
.compat = "fsl,ls1012a-clockgen",
.cmux_groups = {
for (i = 0; i < ARRAY_SIZE(pll->div); i++) {
struct clk *clk;
+ int ret;
snprintf(pll->div[i].name, sizeof(pll->div[i].name),
"cg-pll%d-div%d", idx, i + 1);
}
pll->div[i].clk = clk;
+ ret = clk_register_clkdev(clk, pll->div[i].name, NULL);
+ if (ret != 0)
+ pr_err("%s: %s: register to lookup table failed %ld\n",
+ __func__, pll->div[i].name, PTR_ERR(clk));
+
}
}
}
if (i == ARRAY_SIZE(chipinfo)) {
- pr_err("%s: unknown clockgen node %s\n", __func__,
- np->full_name);
+ pr_err("%s: unknown clockgen node %pOF\n", __func__, np);
goto err;
}
clockgen.info = chipinfo[i];
if (guts) {
clockgen.guts = of_iomap(guts, 0);
if (!clockgen.guts) {
- pr_err("%s: Couldn't map %s regs\n", __func__,
- guts->full_name);
+ pr_err("%s: Couldn't map %pOF regs\n", __func__,
+ guts);
}
}
CLK_OF_DECLARE(qoriq_clockgen_ls1021a, "fsl,ls1021a-clockgen", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls1043a, "fsl,ls1043a-clockgen", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls1046a, "fsl,ls1046a-clockgen", clockgen_init);
+CLK_OF_DECLARE(qoriq_clockgen_ls1088a, "fsl,ls1088a-clockgen", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls2080a, "fsl,ls2080a-clockgen", clockgen_init);
/* Legacy nodes */
SI5351_CLK_INTEGER_MODE,
(hwdata->params.p2 == 0) ? SI5351_CLK_INTEGER_MODE : 0);
+ /* Do a pll soft reset on the affected pll */
+ si5351_reg_write(hwdata->drvdata, SI5351_PLL_RESET,
+ hwdata->num == 0 ? SI5351_PLL_RESET_A :
+ SI5351_PLL_RESET_B);
+
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: p1 = %lu, p2 = %lu, p3 = %lu, parent_rate = %lu, rate = %lu\n",
__func__, clk_hw_get_name(hw),
si5351_set_bits(hwdata->drvdata, SI5351_CLK0_CTRL + hwdata->num,
SI5351_CLK_POWERDOWN, 0);
- /*
- * Do a pll soft reset on both plls, needed in some cases to get
- * all outputs running.
- */
- si5351_reg_write(hwdata->drvdata, SI5351_PLL_RESET,
- SI5351_PLL_RESET_A | SI5351_PLL_RESET_B);
-
dev_dbg(&hwdata->drvdata->client->dev,
"%s - %s: rdiv = %u, parent_rate = %lu, rate = %lu\n",
__func__, clk_hw_get_name(hw), (1 << rdiv),
base + gd->offset, gd->bit_idx, 0, &stm32f4_clk_lock);
if (IS_ERR(clks[idx])) {
- pr_err("%s: Unable to register leaf clock %s\n",
- np->full_name, gd->name);
+ pr_err("%pOF: Unable to register leaf clock %s\n",
+ np, gd->name);
goto fail;
}
}
--- /dev/null
+/*
+ * Copyright (C) Gabriel Fernandez 2017
+ * Author: Gabriel Fernandez <gabriel.fernandez@st.com>
+ *
+ * License terms: GPL V2.0.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/stm32h7-clks.h>
+
+/* Reset Clock Control Registers */
+#define RCC_CR 0x00
+#define RCC_CFGR 0x10
+#define RCC_D1CFGR 0x18
+#define RCC_D2CFGR 0x1C
+#define RCC_D3CFGR 0x20
+#define RCC_PLLCKSELR 0x28
+#define RCC_PLLCFGR 0x2C
+#define RCC_PLL1DIVR 0x30
+#define RCC_PLL1FRACR 0x34
+#define RCC_PLL2DIVR 0x38
+#define RCC_PLL2FRACR 0x3C
+#define RCC_PLL3DIVR 0x40
+#define RCC_PLL3FRACR 0x44
+#define RCC_D1CCIPR 0x4C
+#define RCC_D2CCIP1R 0x50
+#define RCC_D2CCIP2R 0x54
+#define RCC_D3CCIPR 0x58
+#define RCC_BDCR 0x70
+#define RCC_CSR 0x74
+#define RCC_AHB3ENR 0xD4
+#define RCC_AHB1ENR 0xD8
+#define RCC_AHB2ENR 0xDC
+#define RCC_AHB4ENR 0xE0
+#define RCC_APB3ENR 0xE4
+#define RCC_APB1LENR 0xE8
+#define RCC_APB1HENR 0xEC
+#define RCC_APB2ENR 0xF0
+#define RCC_APB4ENR 0xF4
+
+static DEFINE_SPINLOCK(stm32rcc_lock);
+
+static void __iomem *base;
+static struct clk_hw **hws;
+
+/* System clock parent */
+static const char * const sys_src[] = {
+ "hsi_ck", "csi_ck", "hse_ck", "pll1_p" };
+
+static const char * const tracein_src[] = {
+ "hsi_ck", "csi_ck", "hse_ck", "pll1_r" };
+
+static const char * const per_src[] = {
+ "hsi_ker", "csi_ker", "hse_ck", "disabled" };
+
+static const char * const pll_src[] = {
+ "hsi_ck", "csi_ck", "hse_ck", "no clock" };
+
+static const char * const sdmmc_src[] = { "pll1_q", "pll2_r" };
+
+static const char * const dsi_src[] = { "ck_dsi_phy", "pll2_q" };
+
+static const char * const qspi_src[] = {
+ "hclk", "pll1_q", "pll2_r", "per_ck" };
+
+static const char * const fmc_src[] = {
+ "hclk", "pll1_q", "pll2_r", "per_ck" };
+
+/* Kernel clock parent */
+static const char * const swp_src[] = { "pclk1", "hsi_ker" };
+
+static const char * const fdcan_src[] = { "hse_ck", "pll1_q", "pll2_q" };
+
+static const char * const dfsdm1_src[] = { "pclk2", "sys_ck" };
+
+static const char * const spdifrx_src[] = {
+ "pll1_q", "pll2_r", "pll3_r", "hsi_ker" };
+
+static const char *spi_src1[5] = {
+ "pll1_q", "pll2_p", "pll3_p", NULL, "per_ck" };
+
+static const char * const spi_src2[] = {
+ "pclk2", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "hse_ck" };
+
+static const char * const spi_src3[] = {
+ "pclk4", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "hse_ck" };
+
+static const char * const lptim_src1[] = {
+ "pclk1", "pll2_p", "pll3_r", "lse_ck", "lsi_ck", "per_ck" };
+
+static const char * const lptim_src2[] = {
+ "pclk4", "pll2_p", "pll3_r", "lse_ck", "lsi_ck", "per_ck" };
+
+static const char * const cec_src[] = {"lse_ck", "lsi_ck", "csi_ker_div122" };
+
+static const char * const usbotg_src[] = {"pll1_q", "pll3_q", "rc48_ck" };
+
+/* i2c 1,2,3 src */
+static const char * const i2c_src1[] = {
+ "pclk1", "pll3_r", "hsi_ker", "csi_ker" };
+
+static const char * const i2c_src2[] = {
+ "pclk4", "pll3_r", "hsi_ker", "csi_ker" };
+
+static const char * const rng_src[] = {
+ "rc48_ck", "pll1_q", "lse_ck", "lsi_ck" };
+
+/* usart 1,6 src */
+static const char * const usart_src1[] = {
+ "pclk2", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "lse_ck" };
+
+/* usart 2,3,4,5,7,8 src */
+static const char * const usart_src2[] = {
+ "pclk1", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "lse_ck" };
+
+static const char *sai_src[5] = {
+ "pll1_q", "pll2_p", "pll3_p", NULL, "per_ck" };
+
+static const char * const adc_src[] = { "pll2_p", "pll3_r", "per_ck" };
+
+/* lptim 2,3,4,5 src */
+static const char * const lpuart1_src[] = {
+ "pclk3", "pll2_q", "pll3_q", "csi_ker", "lse_ck" };
+
+static const char * const hrtim_src[] = { "tim2_ker", "d1cpre" };
+
+/* RTC clock parent */
+static const char * const rtc_src[] = { "off", "lse_ck", "lsi_ck", "hse_1M" };
+
+/* Micro-controller output clock parent */
+static const char * const mco_src1[] = {
+ "hsi_ck", "lse_ck", "hse_ck", "pll1_q", "rc48_ck" };
+
+static const char * const mco_src2[] = {
+ "sys_ck", "pll2_p", "hse_ck", "pll1_p", "csi_ck", "lsi_ck" };
+
+/* LCD clock */
+static const char * const ltdc_src[] = {"pll3_r"};
+
+/* Gate clock with ready bit and backup domain management */
+struct stm32_ready_gate {
+ struct clk_gate gate;
+ u8 bit_rdy;
+};
+
+#define to_ready_gate_clk(_rgate) container_of(_rgate, struct stm32_ready_gate,\
+ gate)
+
+#define RGATE_TIMEOUT 10000
+
+static int ready_gate_clk_enable(struct clk_hw *hw)
+{
+ struct clk_gate *gate = to_clk_gate(hw);
+ struct stm32_ready_gate *rgate = to_ready_gate_clk(gate);
+ int bit_status;
+ unsigned int timeout = RGATE_TIMEOUT;
+
+ if (clk_gate_ops.is_enabled(hw))
+ return 0;
+
+ clk_gate_ops.enable(hw);
+
+ /* We can't use readl_poll_timeout() because we can blocked if
+ * someone enables this clock before clocksource changes.
+ * Only jiffies counter is available. Jiffies are incremented by
+ * interruptions and enable op does not allow to be interrupted.
+ */
+ do {
+ bit_status = !(readl(gate->reg) & BIT(rgate->bit_rdy));
+
+ if (bit_status)
+ udelay(100);
+
+ } while (bit_status && --timeout);
+
+ return bit_status;
+}
+
+static void ready_gate_clk_disable(struct clk_hw *hw)
+{
+ struct clk_gate *gate = to_clk_gate(hw);
+ struct stm32_ready_gate *rgate = to_ready_gate_clk(gate);
+ int bit_status;
+ unsigned int timeout = RGATE_TIMEOUT;
+
+ if (!clk_gate_ops.is_enabled(hw))
+ return;
+
+ clk_gate_ops.disable(hw);
+
+ do {
+ bit_status = !!(readl(gate->reg) & BIT(rgate->bit_rdy));
+
+ if (bit_status)
+ udelay(100);
+
+ } while (bit_status && --timeout);
+}
+
+static const struct clk_ops ready_gate_clk_ops = {
+ .enable = ready_gate_clk_enable,
+ .disable = ready_gate_clk_disable,
+ .is_enabled = clk_gate_is_enabled,
+};
+
+static struct clk_hw *clk_register_ready_gate(struct device *dev,
+ const char *name, const char *parent_name,
+ void __iomem *reg, u8 bit_idx, u8 bit_rdy,
+ unsigned long flags, spinlock_t *lock)
+{
+ struct stm32_ready_gate *rgate;
+ struct clk_init_data init = { NULL };
+ struct clk_hw *hw;
+ int ret;
+
+ rgate = kzalloc(sizeof(*rgate), GFP_KERNEL);
+ if (!rgate)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &ready_gate_clk_ops;
+ init.flags = flags;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ rgate->bit_rdy = bit_rdy;
+ rgate->gate.lock = lock;
+ rgate->gate.reg = reg;
+ rgate->gate.bit_idx = bit_idx;
+ rgate->gate.hw.init = &init;
+
+ hw = &rgate->gate.hw;
+ ret = clk_hw_register(dev, hw);
+ if (ret) {
+ kfree(rgate);
+ hw = ERR_PTR(ret);
+ }
+
+ return hw;
+}
+
+struct gate_cfg {
+ u32 offset;
+ u8 bit_idx;
+};
+
+struct muxdiv_cfg {
+ u32 offset;
+ u8 shift;
+ u8 width;
+};
+
+struct composite_clk_cfg {
+ struct gate_cfg *gate;
+ struct muxdiv_cfg *mux;
+ struct muxdiv_cfg *div;
+ const char *name;
+ const char * const *parent_name;
+ int num_parents;
+ u32 flags;
+};
+
+struct composite_clk_gcfg_t {
+ u8 flags;
+ const struct clk_ops *ops;
+};
+
+/*
+ * General config definition of a composite clock (only clock diviser for rate)
+ */
+struct composite_clk_gcfg {
+ struct composite_clk_gcfg_t *mux;
+ struct composite_clk_gcfg_t *div;
+ struct composite_clk_gcfg_t *gate;
+};
+
+#define M_CFG_MUX(_mux_ops, _mux_flags)\
+ .mux = &(struct composite_clk_gcfg_t) { _mux_flags, _mux_ops}
+
+#define M_CFG_DIV(_rate_ops, _rate_flags)\
+ .div = &(struct composite_clk_gcfg_t) {_rate_flags, _rate_ops}
+
+#define M_CFG_GATE(_gate_ops, _gate_flags)\
+ .gate = &(struct composite_clk_gcfg_t) { _gate_flags, _gate_ops}
+
+static struct clk_mux *_get_cmux(void __iomem *reg, u8 shift, u8 width,
+ u32 flags, spinlock_t *lock)
+{
+ struct clk_mux *mux;
+
+ mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+ if (!mux)
+ return ERR_PTR(-ENOMEM);
+
+ mux->reg = reg;
+ mux->shift = shift;
+ mux->mask = (1 << width) - 1;
+ mux->flags = flags;
+ mux->lock = lock;
+
+ return mux;
+}
+
+static struct clk_divider *_get_cdiv(void __iomem *reg, u8 shift, u8 width,
+ u32 flags, spinlock_t *lock)
+{
+ struct clk_divider *div;
+
+ div = kzalloc(sizeof(*div), GFP_KERNEL);
+
+ if (!div)
+ return ERR_PTR(-ENOMEM);
+
+ div->reg = reg;
+ div->shift = shift;
+ div->width = width;
+ div->flags = flags;
+ div->lock = lock;
+
+ return div;
+}
+
+static struct clk_gate *_get_cgate(void __iomem *reg, u8 bit_idx, u32 flags,
+ spinlock_t *lock)
+{
+ struct clk_gate *gate;
+
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate)
+ return ERR_PTR(-ENOMEM);
+
+ gate->reg = reg;
+ gate->bit_idx = bit_idx;
+ gate->flags = flags;
+ gate->lock = lock;
+
+ return gate;
+}
+
+struct composite_cfg {
+ struct clk_hw *mux_hw;
+ struct clk_hw *div_hw;
+ struct clk_hw *gate_hw;
+
+ const struct clk_ops *mux_ops;
+ const struct clk_ops *div_ops;
+ const struct clk_ops *gate_ops;
+};
+
+static void get_cfg_composite_div(const struct composite_clk_gcfg *gcfg,
+ const struct composite_clk_cfg *cfg,
+ struct composite_cfg *composite, spinlock_t *lock)
+{
+ struct clk_mux *mux = NULL;
+ struct clk_divider *div = NULL;
+ struct clk_gate *gate = NULL;
+ const struct clk_ops *mux_ops, *div_ops, *gate_ops;
+ struct clk_hw *mux_hw;
+ struct clk_hw *div_hw;
+ struct clk_hw *gate_hw;
+
+ mux_ops = div_ops = gate_ops = NULL;
+ mux_hw = div_hw = gate_hw = NULL;
+
+ if (gcfg->mux && gcfg->mux) {
+ mux = _get_cmux(base + cfg->mux->offset,
+ cfg->mux->shift,
+ cfg->mux->width,
+ gcfg->mux->flags, lock);
+
+ if (!IS_ERR(mux)) {
+ mux_hw = &mux->hw;
+ mux_ops = gcfg->mux->ops ?
+ gcfg->mux->ops : &clk_mux_ops;
+ }
+ }
+
+ if (gcfg->div && cfg->div) {
+ div = _get_cdiv(base + cfg->div->offset,
+ cfg->div->shift,
+ cfg->div->width,
+ gcfg->div->flags, lock);
+
+ if (!IS_ERR(div)) {
+ div_hw = &div->hw;
+ div_ops = gcfg->div->ops ?
+ gcfg->div->ops : &clk_divider_ops;
+ }
+ }
+
+ if (gcfg->gate && gcfg->gate) {
+ gate = _get_cgate(base + cfg->gate->offset,
+ cfg->gate->bit_idx,
+ gcfg->gate->flags, lock);
+
+ if (!IS_ERR(gate)) {
+ gate_hw = &gate->hw;
+ gate_ops = gcfg->gate->ops ?
+ gcfg->gate->ops : &clk_gate_ops;
+ }
+ }
+
+ composite->mux_hw = mux_hw;
+ composite->mux_ops = mux_ops;
+
+ composite->div_hw = div_hw;
+ composite->div_ops = div_ops;
+
+ composite->gate_hw = gate_hw;
+ composite->gate_ops = gate_ops;
+}
+
+/* Kernel Timer */
+struct timer_ker {
+ u8 dppre_shift;
+ struct clk_hw hw;
+ spinlock_t *lock;
+};
+
+#define to_timer_ker(_hw) container_of(_hw, struct timer_ker, hw)
+
+static unsigned long timer_ker_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct timer_ker *clk_elem = to_timer_ker(hw);
+ u32 timpre;
+ u32 dppre_shift = clk_elem->dppre_shift;
+ u32 prescaler;
+ u32 mul;
+
+ timpre = (readl(base + RCC_CFGR) >> 15) & 0x01;
+
+ prescaler = (readl(base + RCC_D2CFGR) >> dppre_shift) & 0x03;
+
+ mul = 2;
+
+ if (prescaler < 4)
+ mul = 1;
+
+ else if (timpre && prescaler > 4)
+ mul = 4;
+
+ return parent_rate * mul;
+}
+
+static const struct clk_ops timer_ker_ops = {
+ .recalc_rate = timer_ker_recalc_rate,
+};
+
+static struct clk_hw *clk_register_stm32_timer_ker(struct device *dev,
+ const char *name, const char *parent_name,
+ unsigned long flags,
+ u8 dppre_shift,
+ spinlock_t *lock)
+{
+ struct timer_ker *element;
+ struct clk_init_data init;
+ struct clk_hw *hw;
+ int err;
+
+ element = kzalloc(sizeof(*element), GFP_KERNEL);
+ if (!element)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &timer_ker_ops;
+ init.flags = flags;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ element->hw.init = &init;
+ element->lock = lock;
+ element->dppre_shift = dppre_shift;
+
+ hw = &element->hw;
+ err = clk_hw_register(dev, hw);
+
+ if (err) {
+ kfree(element);
+ return ERR_PTR(err);
+ }
+
+ return hw;
+}
+
+static const struct clk_div_table d1cpre_div_table[] = {
+ { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1},
+ { 4, 1 }, { 5, 1 }, { 6, 1 }, { 7, 1},
+ { 8, 2 }, { 9, 4 }, { 10, 8 }, { 11, 16 },
+ { 12, 64 }, { 13, 128 }, { 14, 256 },
+ { 15, 512 },
+ { 0 },
+};
+
+static const struct clk_div_table ppre_div_table[] = {
+ { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1},
+ { 4, 2 }, { 5, 4 }, { 6, 8 }, { 7, 16 },
+ { 0 },
+};
+
+static void register_core_and_bus_clocks(void)
+{
+ /* CORE AND BUS */
+ hws[SYS_D1CPRE] = clk_hw_register_divider_table(NULL, "d1cpre",
+ "sys_ck", CLK_IGNORE_UNUSED, base + RCC_D1CFGR, 8, 4, 0,
+ d1cpre_div_table, &stm32rcc_lock);
+
+ hws[HCLK] = clk_hw_register_divider_table(NULL, "hclk", "d1cpre",
+ CLK_IGNORE_UNUSED, base + RCC_D1CFGR, 0, 4, 0,
+ d1cpre_div_table, &stm32rcc_lock);
+
+ /* D1 DOMAIN */
+ /* * CPU Systick */
+ hws[CPU_SYSTICK] = clk_hw_register_fixed_factor(NULL, "systick",
+ "d1cpre", 0, 1, 8);
+
+ /* * APB3 peripheral */
+ hws[PCLK3] = clk_hw_register_divider_table(NULL, "pclk3", "hclk", 0,
+ base + RCC_D1CFGR, 4, 3, 0,
+ ppre_div_table, &stm32rcc_lock);
+
+ /* D2 DOMAIN */
+ /* * APB1 peripheral */
+ hws[PCLK1] = clk_hw_register_divider_table(NULL, "pclk1", "hclk", 0,
+ base + RCC_D2CFGR, 4, 3, 0,
+ ppre_div_table, &stm32rcc_lock);
+
+ /* Timers prescaler clocks */
+ clk_register_stm32_timer_ker(NULL, "tim1_ker", "pclk1", 0,
+ 4, &stm32rcc_lock);
+
+ /* * APB2 peripheral */
+ hws[PCLK2] = clk_hw_register_divider_table(NULL, "pclk2", "hclk", 0,
+ base + RCC_D2CFGR, 8, 3, 0, ppre_div_table,
+ &stm32rcc_lock);
+
+ clk_register_stm32_timer_ker(NULL, "tim2_ker", "pclk2", 0, 8,
+ &stm32rcc_lock);
+
+ /* D3 DOMAIN */
+ /* * APB4 peripheral */
+ hws[PCLK4] = clk_hw_register_divider_table(NULL, "pclk4", "hclk", 0,
+ base + RCC_D3CFGR, 4, 3, 0,
+ ppre_div_table, &stm32rcc_lock);
+}
+
+/* MUX clock configuration */
+struct stm32_mux_clk {
+ const char *name;
+ const char * const *parents;
+ u8 num_parents;
+ u32 offset;
+ u8 shift;
+ u8 width;
+ u32 flags;
+};
+
+#define M_MCLOCF(_name, _parents, _mux_offset, _mux_shift, _mux_width, _flags)\
+{\
+ .name = _name,\
+ .parents = _parents,\
+ .num_parents = ARRAY_SIZE(_parents),\
+ .offset = _mux_offset,\
+ .shift = _mux_shift,\
+ .width = _mux_width,\
+ .flags = _flags,\
+}
+
+#define M_MCLOC(_name, _parents, _mux_offset, _mux_shift, _mux_width)\
+ M_MCLOCF(_name, _parents, _mux_offset, _mux_shift, _mux_width, 0)\
+
+static const struct stm32_mux_clk stm32_mclk[] __initconst = {
+ M_MCLOC("per_ck", per_src, RCC_D1CCIPR, 28, 3),
+ M_MCLOC("pllsrc", pll_src, RCC_PLLCKSELR, 0, 3),
+ M_MCLOC("sys_ck", sys_src, RCC_CFGR, 0, 3),
+ M_MCLOC("tracein_ck", tracein_src, RCC_CFGR, 0, 3),
+};
+
+/* Oscillary clock configuration */
+struct stm32_osc_clk {
+ const char *name;
+ const char *parent;
+ u32 gate_offset;
+ u8 bit_idx;
+ u8 bit_rdy;
+ u32 flags;
+};
+
+#define OSC_CLKF(_name, _parent, _gate_offset, _bit_idx, _bit_rdy, _flags)\
+{\
+ .name = _name,\
+ .parent = _parent,\
+ .gate_offset = _gate_offset,\
+ .bit_idx = _bit_idx,\
+ .bit_rdy = _bit_rdy,\
+ .flags = _flags,\
+}
+
+#define OSC_CLK(_name, _parent, _gate_offset, _bit_idx, _bit_rdy)\
+ OSC_CLKF(_name, _parent, _gate_offset, _bit_idx, _bit_rdy, 0)
+
+static const struct stm32_osc_clk stm32_oclk[] __initconst = {
+ OSC_CLKF("hsi_ck", "hsidiv", RCC_CR, 0, 2, CLK_IGNORE_UNUSED),
+ OSC_CLKF("hsi_ker", "hsidiv", RCC_CR, 1, 2, CLK_IGNORE_UNUSED),
+ OSC_CLKF("csi_ck", "clk-csi", RCC_CR, 7, 8, CLK_IGNORE_UNUSED),
+ OSC_CLKF("csi_ker", "clk-csi", RCC_CR, 9, 8, CLK_IGNORE_UNUSED),
+ OSC_CLKF("rc48_ck", "clk-rc48", RCC_CR, 12, 13, CLK_IGNORE_UNUSED),
+ OSC_CLKF("lsi_ck", "clk-lsi", RCC_CSR, 0, 1, CLK_IGNORE_UNUSED),
+};
+
+/* PLL configuration */
+struct st32h7_pll_cfg {
+ u8 bit_idx;
+ u32 offset_divr;
+ u8 bit_frac_en;
+ u32 offset_frac;
+ u8 divm;
+};
+
+struct stm32_pll_data {
+ const char *name;
+ const char *parent_name;
+ unsigned long flags;
+ const struct st32h7_pll_cfg *cfg;
+};
+
+static const struct st32h7_pll_cfg stm32h7_pll1 = {
+ .bit_idx = 24,
+ .offset_divr = RCC_PLL1DIVR,
+ .bit_frac_en = 0,
+ .offset_frac = RCC_PLL1FRACR,
+ .divm = 4,
+};
+
+static const struct st32h7_pll_cfg stm32h7_pll2 = {
+ .bit_idx = 26,
+ .offset_divr = RCC_PLL2DIVR,
+ .bit_frac_en = 4,
+ .offset_frac = RCC_PLL2FRACR,
+ .divm = 12,
+};
+
+static const struct st32h7_pll_cfg stm32h7_pll3 = {
+ .bit_idx = 28,
+ .offset_divr = RCC_PLL3DIVR,
+ .bit_frac_en = 8,
+ .offset_frac = RCC_PLL3FRACR,
+ .divm = 20,
+};
+
+static const struct stm32_pll_data stm32_pll[] = {
+ { "vco1", "pllsrc", CLK_IGNORE_UNUSED, &stm32h7_pll1 },
+ { "vco2", "pllsrc", 0, &stm32h7_pll2 },
+ { "vco3", "pllsrc", 0, &stm32h7_pll3 },
+};
+
+struct stm32_fractional_divider {
+ void __iomem *mreg;
+ u8 mshift;
+ u8 mwidth;
+ u32 mmask;
+
+ void __iomem *nreg;
+ u8 nshift;
+ u8 nwidth;
+
+ void __iomem *freg_status;
+ u8 freg_bit;
+ void __iomem *freg_value;
+ u8 fshift;
+ u8 fwidth;
+
+ u8 flags;
+ struct clk_hw hw;
+ spinlock_t *lock;
+};
+
+struct stm32_pll_obj {
+ spinlock_t *lock;
+ struct stm32_fractional_divider div;
+ struct stm32_ready_gate rgate;
+ struct clk_hw hw;
+};
+
+#define to_pll(_hw) container_of(_hw, struct stm32_pll_obj, hw)
+
+static int pll_is_enabled(struct clk_hw *hw)
+{
+ struct stm32_pll_obj *clk_elem = to_pll(hw);
+ struct clk_hw *_hw = &clk_elem->rgate.gate.hw;
+
+ __clk_hw_set_clk(_hw, hw);
+
+ return ready_gate_clk_ops.is_enabled(_hw);
+}
+
+static int pll_enable(struct clk_hw *hw)
+{
+ struct stm32_pll_obj *clk_elem = to_pll(hw);
+ struct clk_hw *_hw = &clk_elem->rgate.gate.hw;
+
+ __clk_hw_set_clk(_hw, hw);
+
+ return ready_gate_clk_ops.enable(_hw);
+}
+
+static void pll_disable(struct clk_hw *hw)
+{
+ struct stm32_pll_obj *clk_elem = to_pll(hw);
+ struct clk_hw *_hw = &clk_elem->rgate.gate.hw;
+
+ __clk_hw_set_clk(_hw, hw);
+
+ ready_gate_clk_ops.disable(_hw);
+}
+
+static int pll_frac_is_enabled(struct clk_hw *hw)
+{
+ struct stm32_pll_obj *clk_elem = to_pll(hw);
+ struct stm32_fractional_divider *fd = &clk_elem->div;
+
+ return (readl(fd->freg_status) >> fd->freg_bit) & 0x01;
+}
+
+static unsigned long pll_read_frac(struct clk_hw *hw)
+{
+ struct stm32_pll_obj *clk_elem = to_pll(hw);
+ struct stm32_fractional_divider *fd = &clk_elem->div;
+
+ return (readl(fd->freg_value) >> fd->fshift) &
+ GENMASK(fd->fwidth - 1, 0);
+}
+
+static unsigned long pll_fd_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct stm32_pll_obj *clk_elem = to_pll(hw);
+ struct stm32_fractional_divider *fd = &clk_elem->div;
+ unsigned long m, n;
+ u32 val, mask;
+ u64 rate, rate1 = 0;
+
+ val = readl(fd->mreg);
+ mask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
+ m = (val & mask) >> fd->mshift;
+
+ val = readl(fd->nreg);
+ mask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
+ n = ((val & mask) >> fd->nshift) + 1;
+
+ if (!n || !m)
+ return parent_rate;
+
+ rate = (u64)parent_rate * n;
+ do_div(rate, m);
+
+ if (pll_frac_is_enabled(hw)) {
+ val = pll_read_frac(hw);
+ rate1 = (u64)parent_rate * (u64)val;
+ do_div(rate1, (m * 8191));
+ }
+
+ return rate + rate1;
+}
+
+static const struct clk_ops pll_ops = {
+ .enable = pll_enable,
+ .disable = pll_disable,
+ .is_enabled = pll_is_enabled,
+ .recalc_rate = pll_fd_recalc_rate,
+};
+
+static struct clk_hw *clk_register_stm32_pll(struct device *dev,
+ const char *name,
+ const char *parent,
+ unsigned long flags,
+ const struct st32h7_pll_cfg *cfg,
+ spinlock_t *lock)
+{
+ struct stm32_pll_obj *pll;
+ struct clk_init_data init = { NULL };
+ struct clk_hw *hw;
+ int ret;
+ struct stm32_fractional_divider *div = NULL;
+ struct stm32_ready_gate *rgate;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &pll_ops;
+ init.flags = flags;
+ init.parent_names = &parent;
+ init.num_parents = 1;
+ pll->hw.init = &init;
+
+ hw = &pll->hw;
+ rgate = &pll->rgate;
+
+ rgate->bit_rdy = cfg->bit_idx + 1;
+ rgate->gate.lock = lock;
+ rgate->gate.reg = base + RCC_CR;
+ rgate->gate.bit_idx = cfg->bit_idx;
+
+ div = &pll->div;
+ div->flags = 0;
+ div->mreg = base + RCC_PLLCKSELR;
+ div->mshift = cfg->divm;
+ div->mwidth = 6;
+ div->nreg = base + cfg->offset_divr;
+ div->nshift = 0;
+ div->nwidth = 9;
+
+ div->freg_status = base + RCC_PLLCFGR;
+ div->freg_bit = cfg->bit_frac_en;
+ div->freg_value = base + cfg->offset_frac;
+ div->fshift = 3;
+ div->fwidth = 13;
+
+ div->lock = lock;
+
+ ret = clk_hw_register(dev, hw);
+ if (ret) {
+ kfree(pll);
+ hw = ERR_PTR(ret);
+ }
+
+ return hw;
+}
+
+/* ODF CLOCKS */
+static unsigned long odf_divider_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return clk_divider_ops.recalc_rate(hw, parent_rate);
+}
+
+static long odf_divider_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *prate)
+{
+ return clk_divider_ops.round_rate(hw, rate, prate);
+}
+
+static int odf_divider_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct clk_hw *hwp;
+ int pll_status;
+ int ret;
+
+ hwp = clk_hw_get_parent(hw);
+
+ pll_status = pll_is_enabled(hwp);
+
+ if (pll_status)
+ pll_disable(hwp);
+
+ ret = clk_divider_ops.set_rate(hw, rate, parent_rate);
+
+ if (pll_status)
+ pll_enable(hwp);
+
+ return ret;
+}
+
+static const struct clk_ops odf_divider_ops = {
+ .recalc_rate = odf_divider_recalc_rate,
+ .round_rate = odf_divider_round_rate,
+ .set_rate = odf_divider_set_rate,
+};
+
+static int odf_gate_enable(struct clk_hw *hw)
+{
+ struct clk_hw *hwp;
+ int pll_status;
+ int ret;
+
+ if (clk_gate_ops.is_enabled(hw))
+ return 0;
+
+ hwp = clk_hw_get_parent(hw);
+
+ pll_status = pll_is_enabled(hwp);
+
+ if (pll_status)
+ pll_disable(hwp);
+
+ ret = clk_gate_ops.enable(hw);
+
+ if (pll_status)
+ pll_enable(hwp);
+
+ return ret;
+}
+
+static void odf_gate_disable(struct clk_hw *hw)
+{
+ struct clk_hw *hwp;
+ int pll_status;
+
+ if (!clk_gate_ops.is_enabled(hw))
+ return;
+
+ hwp = clk_hw_get_parent(hw);
+
+ pll_status = pll_is_enabled(hwp);
+
+ if (pll_status)
+ pll_disable(hwp);
+
+ clk_gate_ops.disable(hw);
+
+ if (pll_status)
+ pll_enable(hwp);
+}
+
+static const struct clk_ops odf_gate_ops = {
+ .enable = odf_gate_enable,
+ .disable = odf_gate_disable,
+ .is_enabled = clk_gate_is_enabled,
+};
+
+static struct composite_clk_gcfg odf_clk_gcfg = {
+ M_CFG_DIV(&odf_divider_ops, 0),
+ M_CFG_GATE(&odf_gate_ops, 0),
+};
+
+#define M_ODF_F(_name, _parent, _gate_offset, _bit_idx, _rate_offset,\
+ _rate_shift, _rate_width, _flags)\
+{\
+ .mux = NULL,\
+ .div = &(struct muxdiv_cfg) {_rate_offset, _rate_shift, _rate_width},\
+ .gate = &(struct gate_cfg) {_gate_offset, _bit_idx },\
+ .name = _name,\
+ .parent_name = &(const char *) {_parent},\
+ .num_parents = 1,\
+ .flags = _flags,\
+}
+
+#define M_ODF(_name, _parent, _gate_offset, _bit_idx, _rate_offset,\
+ _rate_shift, _rate_width)\
+M_ODF_F(_name, _parent, _gate_offset, _bit_idx, _rate_offset,\
+ _rate_shift, _rate_width, 0)\
+
+static const struct composite_clk_cfg stm32_odf[3][3] = {
+ {
+ M_ODF_F("pll1_p", "vco1", RCC_PLLCFGR, 16, RCC_PLL1DIVR, 9, 7,
+ CLK_IGNORE_UNUSED),
+ M_ODF_F("pll1_q", "vco1", RCC_PLLCFGR, 17, RCC_PLL1DIVR, 16, 7,
+ CLK_IGNORE_UNUSED),
+ M_ODF_F("pll1_r", "vco1", RCC_PLLCFGR, 18, RCC_PLL1DIVR, 24, 7,
+ CLK_IGNORE_UNUSED),
+ },
+
+ {
+ M_ODF("pll2_p", "vco2", RCC_PLLCFGR, 19, RCC_PLL2DIVR, 9, 7),
+ M_ODF("pll2_q", "vco2", RCC_PLLCFGR, 20, RCC_PLL2DIVR, 16, 7),
+ M_ODF("pll2_r", "vco2", RCC_PLLCFGR, 21, RCC_PLL2DIVR, 24, 7),
+ },
+ {
+ M_ODF("pll3_p", "vco3", RCC_PLLCFGR, 22, RCC_PLL3DIVR, 9, 7),
+ M_ODF("pll3_q", "vco3", RCC_PLLCFGR, 23, RCC_PLL3DIVR, 16, 7),
+ M_ODF("pll3_r", "vco3", RCC_PLLCFGR, 24, RCC_PLL3DIVR, 24, 7),
+ }
+};
+
+/* PERIF CLOCKS */
+struct pclk_t {
+ u32 gate_offset;
+ u8 bit_idx;
+ const char *name;
+ const char *parent;
+ u32 flags;
+};
+
+#define PER_CLKF(_gate_offset, _bit_idx, _name, _parent, _flags)\
+{\
+ .gate_offset = _gate_offset,\
+ .bit_idx = _bit_idx,\
+ .name = _name,\
+ .parent = _parent,\
+ .flags = _flags,\
+}
+
+#define PER_CLK(_gate_offset, _bit_idx, _name, _parent)\
+ PER_CLKF(_gate_offset, _bit_idx, _name, _parent, 0)
+
+static const struct pclk_t pclk[] = {
+ PER_CLK(RCC_AHB3ENR, 31, "d1sram1", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 30, "itcm", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 29, "dtcm2", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 28, "dtcm1", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 8, "flitf", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 5, "jpgdec", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 4, "dma2d", "hclk"),
+ PER_CLK(RCC_AHB3ENR, 0, "mdma", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 28, "usb2ulpi", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 26, "usb1ulpi", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 17, "eth1rx", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 16, "eth1tx", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 15, "eth1mac", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 14, "art", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 1, "dma2", "hclk"),
+ PER_CLK(RCC_AHB1ENR, 0, "dma1", "hclk"),
+ PER_CLK(RCC_AHB2ENR, 31, "d2sram3", "hclk"),
+ PER_CLK(RCC_AHB2ENR, 30, "d2sram2", "hclk"),
+ PER_CLK(RCC_AHB2ENR, 29, "d2sram1", "hclk"),
+ PER_CLK(RCC_AHB2ENR, 5, "hash", "hclk"),
+ PER_CLK(RCC_AHB2ENR, 4, "crypt", "hclk"),
+ PER_CLK(RCC_AHB2ENR, 0, "camitf", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 28, "bkpram", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 25, "hsem", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 21, "bdma", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 19, "crc", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 10, "gpiok", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 9, "gpioj", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 8, "gpioi", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 7, "gpioh", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 6, "gpiog", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 5, "gpiof", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 4, "gpioe", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 3, "gpiod", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 2, "gpioc", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 1, "gpiob", "hclk"),
+ PER_CLK(RCC_AHB4ENR, 0, "gpioa", "hclk"),
+ PER_CLK(RCC_APB3ENR, 6, "wwdg1", "pclk3"),
+ PER_CLK(RCC_APB1LENR, 29, "dac12", "pclk1"),
+ PER_CLK(RCC_APB1LENR, 11, "wwdg2", "pclk1"),
+ PER_CLK(RCC_APB1LENR, 8, "tim14", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 7, "tim13", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 6, "tim12", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 5, "tim7", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 4, "tim6", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 3, "tim5", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 2, "tim4", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 1, "tim3", "tim1_ker"),
+ PER_CLK(RCC_APB1LENR, 0, "tim2", "tim1_ker"),
+ PER_CLK(RCC_APB1HENR, 5, "mdios", "pclk1"),
+ PER_CLK(RCC_APB1HENR, 4, "opamp", "pclk1"),
+ PER_CLK(RCC_APB1HENR, 1, "crs", "pclk1"),
+ PER_CLK(RCC_APB2ENR, 18, "tim17", "tim2_ker"),
+ PER_CLK(RCC_APB2ENR, 17, "tim16", "tim2_ker"),
+ PER_CLK(RCC_APB2ENR, 16, "tim15", "tim2_ker"),
+ PER_CLK(RCC_APB2ENR, 1, "tim8", "tim2_ker"),
+ PER_CLK(RCC_APB2ENR, 0, "tim1", "tim2_ker"),
+ PER_CLK(RCC_APB4ENR, 26, "tmpsens", "pclk4"),
+ PER_CLK(RCC_APB4ENR, 16, "rtcapb", "pclk4"),
+ PER_CLK(RCC_APB4ENR, 15, "vref", "pclk4"),
+ PER_CLK(RCC_APB4ENR, 14, "comp12", "pclk4"),
+ PER_CLK(RCC_APB4ENR, 1, "syscfg", "pclk4"),
+};
+
+/* KERNEL CLOCKS */
+#define KER_CLKF(_gate_offset, _bit_idx,\
+ _mux_offset, _mux_shift, _mux_width,\
+ _name, _parent_name,\
+ _flags) \
+{ \
+ .gate = &(struct gate_cfg) {_gate_offset, _bit_idx},\
+ .mux = &(struct muxdiv_cfg) {_mux_offset, _mux_shift, _mux_width },\
+ .name = _name, \
+ .parent_name = _parent_name, \
+ .num_parents = ARRAY_SIZE(_parent_name),\
+ .flags = _flags,\
+}
+
+#define KER_CLK(_gate_offset, _bit_idx, _mux_offset, _mux_shift, _mux_width,\
+ _name, _parent_name) \
+KER_CLKF(_gate_offset, _bit_idx, _mux_offset, _mux_shift, _mux_width,\
+ _name, _parent_name, 0)\
+
+#define KER_CLKF_NOMUX(_gate_offset, _bit_idx,\
+ _name, _parent_name,\
+ _flags) \
+{ \
+ .gate = &(struct gate_cfg) {_gate_offset, _bit_idx},\
+ .mux = NULL,\
+ .name = _name, \
+ .parent_name = _parent_name, \
+ .num_parents = 1,\
+ .flags = _flags,\
+}
+
+static const struct composite_clk_cfg kclk[] = {
+ KER_CLK(RCC_AHB3ENR, 16, RCC_D1CCIPR, 16, 1, "sdmmc1", sdmmc_src),
+ KER_CLKF(RCC_AHB3ENR, 14, RCC_D1CCIPR, 4, 2, "quadspi", qspi_src,
+ CLK_IGNORE_UNUSED),
+ KER_CLKF(RCC_AHB3ENR, 12, RCC_D1CCIPR, 0, 2, "fmc", fmc_src,
+ CLK_IGNORE_UNUSED),
+ KER_CLK(RCC_AHB1ENR, 27, RCC_D2CCIP2R, 20, 2, "usb2otg", usbotg_src),
+ KER_CLK(RCC_AHB1ENR, 25, RCC_D2CCIP2R, 20, 2, "usb1otg", usbotg_src),
+ KER_CLK(RCC_AHB1ENR, 5, RCC_D3CCIPR, 16, 2, "adc12", adc_src),
+ KER_CLK(RCC_AHB2ENR, 9, RCC_D1CCIPR, 16, 1, "sdmmc2", sdmmc_src),
+ KER_CLK(RCC_AHB2ENR, 6, RCC_D2CCIP2R, 8, 2, "rng", rng_src),
+ KER_CLK(RCC_AHB4ENR, 24, RCC_D3CCIPR, 16, 2, "adc3", adc_src),
+ KER_CLKF(RCC_APB3ENR, 4, RCC_D1CCIPR, 8, 1, "dsi", dsi_src,
+ CLK_SET_RATE_PARENT),
+ KER_CLKF_NOMUX(RCC_APB3ENR, 3, "ltdc", ltdc_src, CLK_SET_RATE_PARENT),
+ KER_CLK(RCC_APB1LENR, 31, RCC_D2CCIP2R, 0, 3, "usart8", usart_src2),
+ KER_CLK(RCC_APB1LENR, 30, RCC_D2CCIP2R, 0, 3, "usart7", usart_src2),
+ KER_CLK(RCC_APB1LENR, 27, RCC_D2CCIP2R, 22, 2, "hdmicec", cec_src),
+ KER_CLK(RCC_APB1LENR, 23, RCC_D2CCIP2R, 12, 2, "i2c3", i2c_src1),
+ KER_CLK(RCC_APB1LENR, 22, RCC_D2CCIP2R, 12, 2, "i2c2", i2c_src1),
+ KER_CLK(RCC_APB1LENR, 21, RCC_D2CCIP2R, 12, 2, "i2c1", i2c_src1),
+ KER_CLK(RCC_APB1LENR, 20, RCC_D2CCIP2R, 0, 3, "uart5", usart_src2),
+ KER_CLK(RCC_APB1LENR, 19, RCC_D2CCIP2R, 0, 3, "uart4", usart_src2),
+ KER_CLK(RCC_APB1LENR, 18, RCC_D2CCIP2R, 0, 3, "usart3", usart_src2),
+ KER_CLK(RCC_APB1LENR, 17, RCC_D2CCIP2R, 0, 3, "usart2", usart_src2),
+ KER_CLK(RCC_APB1LENR, 16, RCC_D2CCIP1R, 20, 2, "spdifrx", spdifrx_src),
+ KER_CLK(RCC_APB1LENR, 15, RCC_D2CCIP1R, 16, 3, "spi3", spi_src1),
+ KER_CLK(RCC_APB1LENR, 14, RCC_D2CCIP1R, 16, 3, "spi2", spi_src1),
+ KER_CLK(RCC_APB1LENR, 9, RCC_D2CCIP2R, 28, 3, "lptim1", lptim_src1),
+ KER_CLK(RCC_APB1HENR, 8, RCC_D2CCIP1R, 28, 2, "fdcan", fdcan_src),
+ KER_CLK(RCC_APB1HENR, 2, RCC_D2CCIP1R, 31, 1, "swp", swp_src),
+ KER_CLK(RCC_APB2ENR, 29, RCC_CFGR, 14, 1, "hrtim", hrtim_src),
+ KER_CLK(RCC_APB2ENR, 28, RCC_D2CCIP1R, 24, 1, "dfsdm1", dfsdm1_src),
+ KER_CLKF(RCC_APB2ENR, 24, RCC_D2CCIP1R, 6, 3, "sai3", sai_src,
+ CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT),
+ KER_CLKF(RCC_APB2ENR, 23, RCC_D2CCIP1R, 6, 3, "sai2", sai_src,
+ CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT),
+ KER_CLKF(RCC_APB2ENR, 22, RCC_D2CCIP1R, 0, 3, "sai1", sai_src,
+ CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT),
+ KER_CLK(RCC_APB2ENR, 20, RCC_D2CCIP1R, 16, 3, "spi5", spi_src2),
+ KER_CLK(RCC_APB2ENR, 13, RCC_D2CCIP1R, 16, 3, "spi4", spi_src2),
+ KER_CLK(RCC_APB2ENR, 12, RCC_D2CCIP1R, 16, 3, "spi1", spi_src1),
+ KER_CLK(RCC_APB2ENR, 5, RCC_D2CCIP2R, 3, 3, "usart6", usart_src1),
+ KER_CLK(RCC_APB2ENR, 4, RCC_D2CCIP2R, 3, 3, "usart1", usart_src1),
+ KER_CLK(RCC_APB4ENR, 21, RCC_D3CCIPR, 24, 3, "sai4b", sai_src),
+ KER_CLK(RCC_APB4ENR, 21, RCC_D3CCIPR, 21, 3, "sai4a", sai_src),
+ KER_CLK(RCC_APB4ENR, 12, RCC_D3CCIPR, 13, 3, "lptim5", lptim_src2),
+ KER_CLK(RCC_APB4ENR, 11, RCC_D3CCIPR, 13, 3, "lptim4", lptim_src2),
+ KER_CLK(RCC_APB4ENR, 10, RCC_D3CCIPR, 13, 3, "lptim3", lptim_src2),
+ KER_CLK(RCC_APB4ENR, 9, RCC_D3CCIPR, 10, 3, "lptim2", lptim_src2),
+ KER_CLK(RCC_APB4ENR, 7, RCC_D3CCIPR, 8, 2, "i2c4", i2c_src2),
+ KER_CLK(RCC_APB4ENR, 5, RCC_D3CCIPR, 28, 3, "spi6", spi_src3),
+ KER_CLK(RCC_APB4ENR, 3, RCC_D3CCIPR, 0, 3, "lpuart1", lpuart1_src),
+};
+
+static struct composite_clk_gcfg kernel_clk_cfg = {
+ M_CFG_MUX(NULL, 0),
+ M_CFG_GATE(NULL, 0),
+};
+
+/* RTC clock */
+/*
+ * RTC & LSE registers are protected against parasitic write access.
+ * PWR_CR_DBP bit must be set to enable write access to RTC registers.
+ */
+/* STM32_PWR_CR */
+#define PWR_CR 0x00
+/* STM32_PWR_CR bit field */
+#define PWR_CR_DBP BIT(8)
+
+static struct composite_clk_gcfg rtc_clk_cfg = {
+ M_CFG_MUX(NULL, 0),
+ M_CFG_GATE(NULL, 0),
+};
+
+static const struct composite_clk_cfg rtc_clk =
+ KER_CLK(RCC_BDCR, 15, RCC_BDCR, 8, 2, "rtc_ck", rtc_src);
+
+/* Micro-controller output clock */
+static struct composite_clk_gcfg mco_clk_cfg = {
+ M_CFG_MUX(NULL, 0),
+ M_CFG_DIV(NULL, CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO),
+};
+
+#define M_MCO_F(_name, _parents, _mux_offset, _mux_shift, _mux_width,\
+ _rate_offset, _rate_shift, _rate_width,\
+ _flags)\
+{\
+ .mux = &(struct muxdiv_cfg) {_mux_offset, _mux_shift, _mux_width },\
+ .div = &(struct muxdiv_cfg) {_rate_offset, _rate_shift, _rate_width},\
+ .gate = NULL,\
+ .name = _name,\
+ .parent_name = _parents,\
+ .num_parents = ARRAY_SIZE(_parents),\
+ .flags = _flags,\
+}
+
+static const struct composite_clk_cfg mco_clk[] = {
+ M_MCO_F("mco1", mco_src1, RCC_CFGR, 22, 4, RCC_CFGR, 18, 4, 0),
+ M_MCO_F("mco2", mco_src2, RCC_CFGR, 29, 3, RCC_CFGR, 25, 4, 0),
+};
+
+static void __init stm32h7_rcc_init(struct device_node *np)
+{
+ struct clk_hw_onecell_data *clk_data;
+ struct composite_cfg c_cfg;
+ int n;
+ const char *hse_clk, *lse_clk, *i2s_clk;
+ struct regmap *pdrm;
+
+ clk_data = kzalloc(sizeof(*clk_data) +
+ sizeof(*clk_data->hws) * STM32H7_MAX_CLKS,
+ GFP_KERNEL);
+ if (!clk_data)
+ return;
+
+ clk_data->num = STM32H7_MAX_CLKS;
+
+ hws = clk_data->hws;
+
+ for (n = 0; n < STM32H7_MAX_CLKS; n++)
+ hws[n] = ERR_PTR(-ENOENT);
+
+ /* get RCC base @ from DT */
+ base = of_iomap(np, 0);
+ if (!base) {
+ pr_err("%s: unable to map resource", np->name);
+ goto err_free_clks;
+ }
+
+ pdrm = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+ if (IS_ERR(pdrm))
+ pr_warn("%s: Unable to get syscfg\n", __func__);
+ else
+ /* In any case disable backup domain write protection
+ * and will never be enabled.
+ * Needed by LSE & RTC clocks.
+ */
+ regmap_update_bits(pdrm, PWR_CR, PWR_CR_DBP, PWR_CR_DBP);
+
+ /* Put parent names from DT */
+ hse_clk = of_clk_get_parent_name(np, 0);
+ lse_clk = of_clk_get_parent_name(np, 1);
+ i2s_clk = of_clk_get_parent_name(np, 2);
+
+ sai_src[3] = i2s_clk;
+ spi_src1[3] = i2s_clk;
+
+ /* Register Internal oscillators */
+ clk_hw_register_fixed_rate(NULL, "clk-hsi", NULL, 0, 64000000);
+ clk_hw_register_fixed_rate(NULL, "clk-csi", NULL, 0, 4000000);
+ clk_hw_register_fixed_rate(NULL, "clk-lsi", NULL, 0, 32000);
+ clk_hw_register_fixed_rate(NULL, "clk-rc48", NULL, 0, 48000);
+
+ /* This clock is coming from outside. Frequencies unknown */
+ hws[CK_DSI_PHY] = clk_hw_register_fixed_rate(NULL, "ck_dsi_phy", NULL,
+ 0, 0);
+
+ hws[HSI_DIV] = clk_hw_register_divider(NULL, "hsidiv", "clk-hsi", 0,
+ base + RCC_CR, 3, 2, CLK_DIVIDER_POWER_OF_TWO,
+ &stm32rcc_lock);
+
+ hws[HSE_1M] = clk_hw_register_divider(NULL, "hse_1M", "hse_ck", 0,
+ base + RCC_CFGR, 8, 6, CLK_DIVIDER_ONE_BASED |
+ CLK_DIVIDER_ALLOW_ZERO,
+ &stm32rcc_lock);
+
+ /* Mux system clocks */
+ for (n = 0; n < ARRAY_SIZE(stm32_mclk); n++)
+ hws[MCLK_BANK + n] = clk_hw_register_mux(NULL,
+ stm32_mclk[n].name,
+ stm32_mclk[n].parents,
+ stm32_mclk[n].num_parents,
+ stm32_mclk[n].flags,
+ stm32_mclk[n].offset + base,
+ stm32_mclk[n].shift,
+ stm32_mclk[n].width,
+ 0,
+ &stm32rcc_lock);
+
+ register_core_and_bus_clocks();
+
+ /* Oscillary clocks */
+ for (n = 0; n < ARRAY_SIZE(stm32_oclk); n++)
+ hws[OSC_BANK + n] = clk_register_ready_gate(NULL,
+ stm32_oclk[n].name,
+ stm32_oclk[n].parent,
+ stm32_oclk[n].gate_offset + base,
+ stm32_oclk[n].bit_idx,
+ stm32_oclk[n].bit_rdy,
+ stm32_oclk[n].flags,
+ &stm32rcc_lock);
+
+ hws[HSE_CK] = clk_register_ready_gate(NULL,
+ "hse_ck",
+ hse_clk,
+ RCC_CR + base,
+ 16, 17,
+ 0,
+ &stm32rcc_lock);
+
+ hws[LSE_CK] = clk_register_ready_gate(NULL,
+ "lse_ck",
+ lse_clk,
+ RCC_BDCR + base,
+ 0, 1,
+ 0,
+ &stm32rcc_lock);
+
+ hws[CSI_KER_DIV122 + n] = clk_hw_register_fixed_factor(NULL,
+ "csi_ker_div122", "csi_ker", 0, 1, 122);
+
+ /* PLLs */
+ for (n = 0; n < ARRAY_SIZE(stm32_pll); n++) {
+ int odf;
+
+ /* Register the VCO */
+ clk_register_stm32_pll(NULL, stm32_pll[n].name,
+ stm32_pll[n].parent_name, stm32_pll[n].flags,
+ stm32_pll[n].cfg,
+ &stm32rcc_lock);
+
+ /* Register the 3 output dividers */
+ for (odf = 0; odf < 3; odf++) {
+ int idx = n * 3 + odf;
+
+ get_cfg_composite_div(&odf_clk_gcfg, &stm32_odf[n][odf],
+ &c_cfg, &stm32rcc_lock);
+
+ hws[ODF_BANK + idx] = clk_hw_register_composite(NULL,
+ stm32_odf[n][odf].name,
+ stm32_odf[n][odf].parent_name,
+ stm32_odf[n][odf].num_parents,
+ c_cfg.mux_hw, c_cfg.mux_ops,
+ c_cfg.div_hw, c_cfg.div_ops,
+ c_cfg.gate_hw, c_cfg.gate_ops,
+ stm32_odf[n][odf].flags);
+ }
+ }
+
+ /* Peripheral clocks */
+ for (n = 0; n < ARRAY_SIZE(pclk); n++)
+ hws[PERIF_BANK + n] = clk_hw_register_gate(NULL, pclk[n].name,
+ pclk[n].parent,
+ pclk[n].flags, base + pclk[n].gate_offset,
+ pclk[n].bit_idx, pclk[n].flags, &stm32rcc_lock);
+
+ /* Kernel clocks */
+ for (n = 0; n < ARRAY_SIZE(kclk); n++) {
+ get_cfg_composite_div(&kernel_clk_cfg, &kclk[n], &c_cfg,
+ &stm32rcc_lock);
+
+ hws[KERN_BANK + n] = clk_hw_register_composite(NULL,
+ kclk[n].name,
+ kclk[n].parent_name,
+ kclk[n].num_parents,
+ c_cfg.mux_hw, c_cfg.mux_ops,
+ c_cfg.div_hw, c_cfg.div_ops,
+ c_cfg.gate_hw, c_cfg.gate_ops,
+ kclk[n].flags);
+ }
+
+ /* RTC clock (default state is off) */
+ clk_hw_register_fixed_rate(NULL, "off", NULL, 0, 0);
+
+ get_cfg_composite_div(&rtc_clk_cfg, &rtc_clk, &c_cfg, &stm32rcc_lock);
+
+ hws[RTC_CK] = clk_hw_register_composite(NULL,
+ rtc_clk.name,
+ rtc_clk.parent_name,
+ rtc_clk.num_parents,
+ c_cfg.mux_hw, c_cfg.mux_ops,
+ c_cfg.div_hw, c_cfg.div_ops,
+ c_cfg.gate_hw, c_cfg.gate_ops,
+ rtc_clk.flags);
+
+ /* Micro-controller clocks */
+ for (n = 0; n < ARRAY_SIZE(mco_clk); n++) {
+ get_cfg_composite_div(&mco_clk_cfg, &mco_clk[n], &c_cfg,
+ &stm32rcc_lock);
+
+ hws[MCO_BANK + n] = clk_hw_register_composite(NULL,
+ mco_clk[n].name,
+ mco_clk[n].parent_name,
+ mco_clk[n].num_parents,
+ c_cfg.mux_hw, c_cfg.mux_ops,
+ c_cfg.div_hw, c_cfg.div_ops,
+ c_cfg.gate_hw, c_cfg.gate_ops,
+ mco_clk[n].flags);
+ }
+
+ of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
+
+ return;
+
+err_free_clks:
+ kfree(clk_data);
+}
+
+/* The RCC node is a clock and reset controller, and these
+ * functionalities are supported by different drivers that
+ * matches the same compatible strings.
+ */
+CLK_OF_DECLARE_DRIVER(stm32h7_rcc, "st,stm32h743-rcc", stm32h7_rcc_init);
#define VC5_PRIM_SRC_SHDN 0x10
#define VC5_PRIM_SRC_SHDN_EN_XTAL BIT(7)
#define VC5_PRIM_SRC_SHDN_EN_CLKIN BIT(6)
+#define VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ BIT(3)
#define VC5_PRIM_SRC_SHDN_SP BIT(1)
#define VC5_PRIM_SRC_SHDN_EN_GBL_SHDN BIT(0)
/* flags to describe chip features */
/* chip has built-in oscilator */
#define VC5_HAS_INTERNAL_XTAL BIT(0)
+/* chip has PFD requency doubler */
+#define VC5_HAS_PFD_FREQ_DBL BIT(1)
/* Supported IDT VC5 models. */
enum vc5_model {
IDT_VC5_5P49V5923,
+ IDT_VC5_5P49V5925,
IDT_VC5_5P49V5933,
IDT_VC5_5P49V5935,
+ IDT_VC6_5P49V6901,
};
/* Structure to describe features of a particular VC5 model */
struct clk *pin_clkin;
unsigned char clk_mux_ins;
struct clk_hw clk_mux;
+ struct clk_hw clk_mul;
+ struct clk_hw clk_pfd;
struct vc5_hw_data clk_pll;
struct vc5_hw_data clk_fod[VC5_MAX_FOD_NUM];
struct vc5_hw_data clk_out[VC5_MAX_CLK_OUT_NUM];
"mux"
};
+static const char * const vc5_dbl_names[] = {
+ "dbl"
+};
+
+static const char * const vc5_pfd_names[] = {
+ "pfd"
+};
+
static const char * const vc5_pll_names[] = {
"pll"
};
return regmap_update_bits(vc5->regmap, VC5_PRIM_SRC_SHDN, mask, src);
}
-static unsigned long vc5_mux_recalc_rate(struct clk_hw *hw,
+static const struct clk_ops vc5_mux_ops = {
+ .set_parent = vc5_mux_set_parent,
+ .get_parent = vc5_mux_get_parent,
+};
+
+static unsigned long vc5_dbl_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct vc5_driver_data *vc5 =
- container_of(hw, struct vc5_driver_data, clk_mux);
+ container_of(hw, struct vc5_driver_data, clk_mul);
+ unsigned int premul;
+
+ regmap_read(vc5->regmap, VC5_PRIM_SRC_SHDN, &premul);
+ if (premul & VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ)
+ parent_rate *= 2;
+
+ return parent_rate;
+}
+
+static long vc5_dbl_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ if ((*parent_rate == rate) || ((*parent_rate * 2) == rate))
+ return rate;
+ else
+ return -EINVAL;
+}
+
+static int vc5_dbl_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct vc5_driver_data *vc5 =
+ container_of(hw, struct vc5_driver_data, clk_mul);
+ u32 mask;
+
+ if ((parent_rate * 2) == rate)
+ mask = VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ;
+ else
+ mask = 0;
+
+ regmap_update_bits(vc5->regmap, VC5_PRIM_SRC_SHDN,
+ VC5_PRIM_SRC_SHDN_EN_DOUBLE_XTAL_FREQ,
+ mask);
+
+ return 0;
+}
+
+static const struct clk_ops vc5_dbl_ops = {
+ .recalc_rate = vc5_dbl_recalc_rate,
+ .round_rate = vc5_dbl_round_rate,
+ .set_rate = vc5_dbl_set_rate,
+};
+
+static unsigned long vc5_pfd_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct vc5_driver_data *vc5 =
+ container_of(hw, struct vc5_driver_data, clk_pfd);
unsigned int prediv, div;
regmap_read(vc5->regmap, VC5_VCO_CTRL_AND_PREDIV, &prediv);
return parent_rate / VC5_REF_DIVIDER_REF_DIV(div);
}
-static long vc5_mux_round_rate(struct clk_hw *hw, unsigned long rate,
+static long vc5_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
unsigned long idiv;
return *parent_rate / idiv;
}
-static int vc5_mux_set_rate(struct clk_hw *hw, unsigned long rate,
+static int vc5_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct vc5_driver_data *vc5 =
- container_of(hw, struct vc5_driver_data, clk_mux);
+ container_of(hw, struct vc5_driver_data, clk_pfd);
unsigned long idiv;
u8 div;
return 0;
}
-static const struct clk_ops vc5_mux_ops = {
- .set_parent = vc5_mux_set_parent,
- .get_parent = vc5_mux_get_parent,
- .recalc_rate = vc5_mux_recalc_rate,
- .round_rate = vc5_mux_round_rate,
- .set_rate = vc5_mux_set_rate,
+static const struct clk_ops vc5_pfd_ops = {
+ .recalc_rate = vc5_pfd_recalc_rate,
+ .round_rate = vc5_pfd_round_rate,
+ .set_rate = vc5_pfd_set_rate,
};
/*
div_frc = (od_frc[0] << 22) | (od_frc[1] << 14) |
(od_frc[2] << 6) | (od_frc[3] >> 2);
+ /* Avoid division by zero if the output is not configured. */
+ if (div_int == 0 && div_frc == 0)
+ return 0;
+
/* The PLL divider has 12 integer bits and 30 fractional bits */
return div64_u64((u64)f_in << 24ULL, ((u64)div_int << 24ULL) + div_frc);
}
{
struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
struct vc5_driver_data *vc5 = hwdata->vc5;
+ const u8 mask = VC5_OUT_DIV_CONTROL_SELB_NORM |
+ VC5_OUT_DIV_CONTROL_SEL_EXT |
+ VC5_OUT_DIV_CONTROL_EN_FOD;
+ unsigned int src;
+ int ret;
+
+ /*
+ * If the input mux is disabled, enable it first and
+ * select source from matching FOD.
+ */
+ regmap_read(vc5->regmap, VC5_OUT_DIV_CONTROL(hwdata->num), &src);
+ if ((src & mask) == 0) {
+ src = VC5_OUT_DIV_CONTROL_RESET | VC5_OUT_DIV_CONTROL_EN_FOD;
+ ret = regmap_update_bits(vc5->regmap,
+ VC5_OUT_DIV_CONTROL(hwdata->num),
+ mask | VC5_OUT_DIV_CONTROL_RESET, src);
+ if (ret)
+ return ret;
+ }
/* Enable the clock buffer */
regmap_update_bits(vc5->regmap, VC5_CLK_OUTPUT_CFG(hwdata->num, 1),
struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
struct vc5_driver_data *vc5 = hwdata->vc5;
- /* Enable the clock buffer */
+ /* Disable the clock buffer */
regmap_update_bits(vc5->regmap, VC5_CLK_OUTPUT_CFG(hwdata->num, 1),
VC5_CLK_OUTPUT_CFG1_EN_CLKBUF, 0);
}
regmap_read(vc5->regmap, VC5_OUT_DIV_CONTROL(hwdata->num), &src);
src &= mask;
+ if (src == 0) /* Input mux set to DISABLED */
+ return 0;
+
if ((src & fodclkmask) == VC5_OUT_DIV_CONTROL_EN_FOD)
return 0;
case IDT_VC5_5P49V5933:
return (n == 0) ? 0 : 3;
case IDT_VC5_5P49V5923:
+ case IDT_VC5_5P49V5925:
case IDT_VC5_5P49V5935:
+ case IDT_VC6_5P49V6901:
default:
return n;
}
goto err_clk;
}
+ if (vc5->chip_info->flags & VC5_HAS_PFD_FREQ_DBL) {
+ /* Register frequency doubler */
+ memset(&init, 0, sizeof(init));
+ init.name = vc5_dbl_names[0];
+ init.ops = &vc5_dbl_ops;
+ init.flags = CLK_SET_RATE_PARENT;
+ init.parent_names = vc5_mux_names;
+ init.num_parents = 1;
+ vc5->clk_mul.init = &init;
+ ret = devm_clk_hw_register(&client->dev, &vc5->clk_mul);
+ if (ret) {
+ dev_err(&client->dev, "unable to register %s\n",
+ init.name);
+ goto err_clk;
+ }
+ }
+
+ /* Register PFD */
+ memset(&init, 0, sizeof(init));
+ init.name = vc5_pfd_names[0];
+ init.ops = &vc5_pfd_ops;
+ init.flags = CLK_SET_RATE_PARENT;
+ if (vc5->chip_info->flags & VC5_HAS_PFD_FREQ_DBL)
+ init.parent_names = vc5_dbl_names;
+ else
+ init.parent_names = vc5_mux_names;
+ init.num_parents = 1;
+ vc5->clk_pfd.init = &init;
+ ret = devm_clk_hw_register(&client->dev, &vc5->clk_pfd);
+ if (ret) {
+ dev_err(&client->dev, "unable to register %s\n", init.name);
+ goto err_clk;
+ }
+
/* Register PLL */
memset(&init, 0, sizeof(init));
init.name = vc5_pll_names[0];
init.ops = &vc5_pll_ops;
init.flags = CLK_SET_RATE_PARENT;
- init.parent_names = vc5_mux_names;
+ init.parent_names = vc5_pfd_names;
init.num_parents = 1;
vc5->clk_pll.num = 0;
vc5->clk_pll.vc5 = vc5;
.flags = 0,
};
+static const struct vc5_chip_info idt_5p49v5925_info = {
+ .model = IDT_VC5_5P49V5925,
+ .clk_fod_cnt = 4,
+ .clk_out_cnt = 5,
+ .flags = 0,
+};
+
static const struct vc5_chip_info idt_5p49v5933_info = {
.model = IDT_VC5_5P49V5933,
.clk_fod_cnt = 2,
.flags = VC5_HAS_INTERNAL_XTAL,
};
+static const struct vc5_chip_info idt_5p49v6901_info = {
+ .model = IDT_VC6_5P49V6901,
+ .clk_fod_cnt = 4,
+ .clk_out_cnt = 5,
+ .flags = VC5_HAS_PFD_FREQ_DBL,
+};
+
static const struct i2c_device_id vc5_id[] = {
{ "5p49v5923", .driver_data = IDT_VC5_5P49V5923 },
+ { "5p49v5925", .driver_data = IDT_VC5_5P49V5925 },
{ "5p49v5933", .driver_data = IDT_VC5_5P49V5933 },
{ "5p49v5935", .driver_data = IDT_VC5_5P49V5935 },
+ { "5p49v6901", .driver_data = IDT_VC6_5P49V6901 },
{ }
};
MODULE_DEVICE_TABLE(i2c, vc5_id);
static const struct of_device_id clk_vc5_of_match[] = {
{ .compatible = "idt,5p49v5923", .data = &idt_5p49v5923_info },
+ { .compatible = "idt,5p49v5925", .data = &idt_5p49v5925_info },
{ .compatible = "idt,5p49v5933", .data = &idt_5p49v5933_info },
{ .compatible = "idt,5p49v5935", .data = &idt_5p49v5935_info },
+ { .compatible = "idt,5p49v6901", .data = &idt_5p49v6901_info },
{ },
};
MODULE_DEVICE_TABLE(of, clk_vc5_of_match);
reg = of_iomap(np, 0);
if (reg == NULL) {
- pr_err("Unable to map CSR register for %s\n", np->full_name);
+ pr_err("Unable to map CSR register for %pOF\n", np);
return;
}
of_property_read_string(np, "clock-output-names", &clk_name);
/* Parse the DTS register for resource */
rc = of_address_to_resource(np, 0, &res);
if (rc != 0) {
- pr_err("no DTS register for %s\n", np->full_name);
+ pr_err("no DTS register for %pOF\n", np);
return;
}
csr_reg = of_iomap(np, 0);
if (!csr_reg) {
- pr_err("Unable to map resource for %s\n", np->full_name);
+ pr_err("Unable to map resource for %pOF\n", np);
return;
}
of_property_read_string(np, "clock-output-names", &clk_name);
rc = of_address_to_resource(np, i, &res);
if (rc != 0) {
if (i == 0) {
- pr_err("no DTS register for %s\n",
- np->full_name);
+ pr_err("no DTS register for %pOF\n", np);
return;
}
break;
}
map_res = of_iomap(np, i);
if (map_res == NULL) {
- pr_err("Unable to map resource %d for %s\n",
- i, np->full_name);
+ pr_err("Unable to map resource %d for %pOF\n", i, np);
goto err;
}
if (strcmp(res.name, "div-reg") == 0)
pr_debug("Add %s clock\n", clk_name);
rc = of_clk_add_provider(np, of_clk_src_simple_get, clk);
if (rc != 0)
- pr_err("%s: could register provider clk %s\n", __func__,
- np->full_name);
+ pr_err("%s: could register provider clk %pOF\n", __func__, np);
return;
mutex_lock(&of_clk_mutex);
list_add(&cp->link, &of_clk_providers);
mutex_unlock(&of_clk_mutex);
- pr_debug("Added clock from %s\n", np->full_name);
+ pr_debug("Added clock from %pOF\n", np);
ret = of_clk_set_defaults(np, true);
if (ret < 0)
mutex_lock(&of_clk_mutex);
list_add(&cp->link, &of_clk_providers);
mutex_unlock(&of_clk_mutex);
- pr_debug("Added clk_hw provider from %s\n", np->full_name);
+ pr_debug("Added clk_hw provider from %pOF\n", np);
ret = of_clk_set_defaults(np, true);
if (ret < 0)
break;
} else if (name && index >= 0) {
if (PTR_ERR(clk) != -EPROBE_DEFER)
- pr_err("ERROR: could not get clock %s:%s(%i)\n",
- np->full_name, name ? name : "", index);
+ pr_err("ERROR: could not get clock %pOF:%s(%i)\n",
+ np, name ? name : "", index);
return clk;
}
};
static struct hisi_gate_clock hi6220_separated_gate_clks_ao[] __initdata = {
- { HI6220_WDT0_PCLK, "wdt0_pclk", "clk_tcxo", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 12, 0, },
- { HI6220_WDT1_PCLK, "wdt1_pclk", "clk_tcxo", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 13, 0, },
- { HI6220_WDT2_PCLK, "wdt2_pclk", "clk_tcxo", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 14, 0, },
+ { HI6220_WDT0_PCLK, "wdt0_pclk", "ref32k", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 12, 0, },
+ { HI6220_WDT1_PCLK, "wdt1_pclk", "ref32k", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 13, 0, },
+ { HI6220_WDT2_PCLK, "wdt2_pclk", "ref32k", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 14, 0, },
{ HI6220_TIMER0_PCLK, "timer0_pclk", "clk_tcxo", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 15, 0, },
{ HI6220_TIMER1_PCLK, "timer1_pclk", "clk_tcxo", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 16, 0, },
{ HI6220_TIMER2_PCLK, "timer2_pclk", "clk_tcxo", CLK_SET_RATE_PARENT|CLK_IGNORE_UNUSED, 0x630, 17, 0, },
clk[IMX5_CLK_LP_APM] = imx_clk_mux("lp_apm", MXC_CCM_CCSR, 9, 1,
lp_apm_sel, ARRAY_SIZE(lp_apm_sel));
- clk[IMX5_CLK_IPU_DI0_SEL] = imx_clk_mux("ipu_di0_sel", MXC_CCM_CSCMR2, 26, 3,
- mx51_ipu_di0_sel, ARRAY_SIZE(mx51_ipu_di0_sel));
- clk[IMX5_CLK_IPU_DI1_SEL] = imx_clk_mux("ipu_di1_sel", MXC_CCM_CSCMR2, 29, 3,
- mx51_ipu_di1_sel, ARRAY_SIZE(mx51_ipu_di1_sel));
+ clk[IMX5_CLK_IPU_DI0_SEL] = imx_clk_mux_flags("ipu_di0_sel", MXC_CCM_CSCMR2, 26, 3,
+ mx51_ipu_di0_sel, ARRAY_SIZE(mx51_ipu_di0_sel), CLK_SET_RATE_PARENT);
+ clk[IMX5_CLK_IPU_DI1_SEL] = imx_clk_mux_flags("ipu_di1_sel", MXC_CCM_CSCMR2, 29, 3,
+ mx51_ipu_di1_sel, ARRAY_SIZE(mx51_ipu_di1_sel), CLK_SET_RATE_PARENT);
clk[IMX5_CLK_TVE_EXT_SEL] = imx_clk_mux_flags("tve_ext_sel", MXC_CCM_CSCMR1, 6, 1,
mx51_tve_ext_sel, ARRAY_SIZE(mx51_tve_ext_sel), CLK_SET_RATE_PARENT);
clk[IMX5_CLK_TVE_SEL] = imx_clk_mux("tve_sel", MXC_CCM_CSCMR1, 7, 1,
static const char *pll6_bypass_sels[] = { "pll6", "pll6_bypass_src", };
static const char *pll7_bypass_sels[] = { "pll7", "pll7_bypass_src", };
-static struct clk_div_table clk_enet_ref_table[] = {
+static const struct clk_div_table clk_enet_ref_table[] = {
{ .val = 0, .div = 20, },
{ .val = 1, .div = 10, },
{ .val = 2, .div = 5, },
{ }
};
-static struct clk_div_table post_div_table[] = {
+static const struct clk_div_table post_div_table[] = {
{ .val = 2, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 0, .div = 4, },
{ }
};
-static struct clk_div_table video_div_table[] = {
+static const struct clk_div_table video_div_table[] = {
{ .val = 0, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 2, .div = 1, },
IMX6SX_CLK_EPIT2,
};
-static struct clk_div_table clk_enet_ref_table[] = {
+static const struct clk_div_table clk_enet_ref_table[] = {
{ .val = 0, .div = 20, },
{ .val = 1, .div = 10, },
{ .val = 2, .div = 5, },
{ }
};
-static struct clk_div_table post_div_table[] = {
+static const struct clk_div_table post_div_table[] = {
{ .val = 2, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 0, .div = 4, },
{ }
};
-static struct clk_div_table video_div_table[] = {
+static const struct clk_div_table video_div_table[] = {
{ .val = 0, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 2, .div = 1, },
IMX6UL_CLK_MMDC_P0_FAST, IMX6UL_CLK_MMDC_P0_IPG,
};
-static struct clk_div_table clk_enet_ref_table[] = {
+static const struct clk_div_table clk_enet_ref_table[] = {
{ .val = 0, .div = 20, },
{ .val = 1, .div = 10, },
{ .val = 2, .div = 5, },
{ }
};
-static struct clk_div_table post_div_table[] = {
+static const struct clk_div_table post_div_table[] = {
{ .val = 2, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 0, .div = 4, },
{ }
};
-static struct clk_div_table video_div_table[] = {
+static const struct clk_div_table video_div_table[] = {
{ .val = 0, .div = 1, },
{ .val = 1, .div = 2, },
{ .val = 2, .div = 1, },
static u32 share_count_sai3;
static u32 share_count_nand;
-static struct clk_div_table test_div_table[] = {
+static const struct clk_div_table test_div_table[] = {
{ .val = 3, .div = 1, },
{ .val = 2, .div = 1, },
{ .val = 1, .div = 2, },
{ }
};
-static struct clk_div_table post_div_table[] = {
+static const struct clk_div_table post_div_table[] = {
{ .val = 3, .div = 4, },
{ .val = 2, .div = 1, },
{ .val = 1, .div = 2, },
git.codelabs.ch / muen / linux.git / commitdiff