mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-30 14:19:16 +00:00
Samsung SoC drivers changes for v5.11
1. Limit the big.LITTLE cpuidle driver to Peach-Pit/Pi Chromebooks only
because these are the only platforms were the driver works properly.
2. Convert the Exynos CLKOUT driver to a full module which solves
boot-probe ordering issues (e.g. if device nodes in DTS are moved).
This also brings modularization and compile testing.
3. Few minor cleanups in documentation and code.
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Merge tag 'samsung-drivers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/drivers
Samsung SoC drivers changes for v5.11
1. Limit the big.LITTLE cpuidle driver to Peach-Pit/Pi Chromebooks only
because these are the only platforms were the driver works properly.
2. Convert the Exynos CLKOUT driver to a full module which solves
boot-probe ordering issues (e.g. if device nodes in DTS are moved).
This also brings modularization and compile testing.
3. Few minor cleanups in documentation and code.
* tag 'samsung-drivers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
clk: samsung: allow building the clkout driver as module
soc: samsung: s3c-pm-check: Fix incorrectly named variable 'val'
soc: samsung: exynos5422-asv: remove unneeded semicolon
serial: s3c: Update path of Samsung S3C machine file
Documentation: Update paths of Samsung S3C machine files
clk: samsung: exynos-clkout: convert to module driver
soc: samsung: exynos-pmu: instantiate clkout driver as MFD
cpuidle: big.LITTLE: enable driver only on Peach-Pit/Pi Chromebooks
Link: https://lore.kernel.org/r/20201113162211.10020-1-krzk@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
commit
4ce4be5d28
14 changed files with 185 additions and 89 deletions
|
|
@ -2951,7 +2951,7 @@
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|||
mtdset= [ARM]
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ARM/S3C2412 JIVE boot control
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||||
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See arch/arm/mach-s3c2412/mach-jive.c
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See arch/arm/mach-s3c/mach-jive.c
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mtouchusb.raw_coordinates=
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[HW] Make the MicroTouch USB driver use raw coordinates
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|
|
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|||
|
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@ -29,7 +29,7 @@ GPIOLIB
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The following functions now either have a `s3c_` specific variant
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or are merged into gpiolib. See the definitions in
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arch/arm/plat-samsung/include/plat/gpio-cfg.h:
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arch/arm/mach-s3c/gpio-cfg.h:
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- s3c2410_gpio_setpin() gpio_set_value() or gpio_direction_output()
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- s3c2410_gpio_getpin() gpio_get_value() or gpio_direction_input()
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@ -86,7 +86,7 @@ between the calls.
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Headers
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-------
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See arch/arm/mach-s3c24xx/include/mach/regs-gpio.h for the list
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See arch/arm/mach-s3c/regs-gpio-s3c24xx.h for the list
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of GPIO pins, and the configuration values for them. This
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is included by using #include <mach/regs-gpio.h>
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@ -18,7 +18,7 @@ Introduction
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versions.
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The S3C2416 and S3C2450 devices are very similar and S3C2450 support is
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included under the arch/arm/mach-s3c2416 directory. Note, while core
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included under the arch/arm/mach-s3c directory. Note, while core
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support for these SoCs is in, work on some of the extra peripherals
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and extra interrupts is still ongoing.
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@ -37,19 +37,11 @@ Configuration
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Layout
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------
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The core support files are located in the platform code contained in
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arch/arm/plat-s3c24xx with headers in include/asm-arm/plat-s3c24xx.
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This directory should be kept to items shared between the platform
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code (arch/arm/plat-s3c24xx) and the arch/arm/mach-s3c24* code.
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The core support files, register, kernel and paltform data are located in the
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platform code contained in arch/arm/mach-s3c with headers in
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arch/arm/mach-s3c/include
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Each cpu has a directory with the support files for it, and the
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machines that carry the device. For example S3C2410 is contained
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in arch/arm/mach-s3c2410 and S3C2440 in arch/arm/mach-s3c2440
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Register, kernel and platform data definitions are held in the
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arch/arm/mach-s3c2410 directory./include/mach
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arch/arm/plat-s3c24xx:
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arch/arm/mach-s3c:
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Files in here are either common to all the s3c24xx family,
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or are common to only some of them with names to indicate this
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@ -134,7 +126,7 @@ Adding New Machines
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should keep this in mind before altering items outside of their own
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machine files.
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Machine definitions should be kept in linux/arch/arm/mach-s3c2410,
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Machine definitions should be kept in arch/arm/mach-s3c,
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and there are a number of examples that can be looked at.
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Read the kernel patch submission policies as well as the
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@ -293,7 +285,7 @@ Platform Data
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}
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Note, since the code is marked as __init, it should not be
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exported outside arch/arm/mach-s3c2410/, or exported to
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exported outside arch/arm/mach-s3c/, or exported to
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modules via EXPORT_SYMBOL() and related functions.
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|
|
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|
@ -36,7 +36,7 @@ Board Support
|
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-------------
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|
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The driver attaches to a platform device, which will need to be
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added by the board specific support file in linux/arch/arm/mach-s3c2410,
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added by the board specific support file in arch/arm/mach-s3c,
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such as mach-bast.c or mach-smdk2410.c
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The platform device's platform_data field is only needed if the
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@ -51,9 +51,9 @@ Board Support
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Platform Data
|
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-------------
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See arch/arm/mach-s3c2410/include/mach/usb-control.h for the
|
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See include/linux/platform_data/usb-ohci-s3c2410.h for the
|
||||
descriptions of the platform device data. An implementation
|
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can be found in linux/arch/arm/mach-s3c2410/usb-simtec.c .
|
||||
can be found in arch/arm/mach-s3c/simtec-usb.c .
|
||||
|
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The `struct s3c2410_hcd_info` contains a pair of functions
|
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that get called to enable over-current detection, and to
|
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|
|
|
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|
|
@ -37,5 +37,4 @@ implementation to configure pins as necessary.
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The s3c_gpio_cfgpin() and s3c_gpio_setpull() provide the means for a
|
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driver or machine to change gpio configuration.
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|
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See arch/arm/plat-samsung/include/plat/gpio-cfg.h for more information
|
||||
on these functions.
|
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See arch/arm/mach-s3c/gpio-cfg.h for more information on these functions.
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|
|
|
|||
|
|
@ -34,7 +34,7 @@ These resources should be specified in that order, as the ordering of the
|
|||
two address regions is important (the driver expects these to be address
|
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and then data).
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|
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An example from arch/arm/mach-s3c2410/mach-bast.c is::
|
||||
An example from arch/arm/mach-s3c/mach-bast.c is::
|
||||
|
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static struct resource bast_dm9k_resource[] = {
|
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[0] = {
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|
|
|
|||
|
|
@ -19,6 +19,16 @@ config EXYNOS_AUDSS_CLK_CON
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on some Exynos SoC variants. Choose M or Y here if you want to
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use audio devices such as I2S, PCM, etc.
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|
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config EXYNOS_CLKOUT
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tristate "Samsung Exynos clock output driver"
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depends on COMMON_CLK_SAMSUNG
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default y if ARCH_EXYNOS
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help
|
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Support for the clock output (XCLKOUT) present on some of Exynos SoC
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variants. Usually the XCLKOUT is used to monitor the status of the
|
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certains clocks from SoC, but it could also be tied to other devices
|
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as an input clock.
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# For S3C24XX platforms, select following symbols:
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config S3C2410_COMMON_CLK
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bool "Samsung S3C2410 clock controller support" if COMPILE_TEST
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||||
|
|
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|||
|
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@ -15,7 +15,7 @@ obj-$(CONFIG_SOC_EXYNOS5420) += clk-exynos5420.o
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obj-$(CONFIG_SOC_EXYNOS5420) += clk-exynos5-subcmu.o
|
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obj-$(CONFIG_EXYNOS_ARM64_COMMON_CLK) += clk-exynos5433.o
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obj-$(CONFIG_EXYNOS_AUDSS_CLK_CON) += clk-exynos-audss.o
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obj-$(CONFIG_ARCH_EXYNOS) += clk-exynos-clkout.o
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obj-$(CONFIG_EXYNOS_CLKOUT) += clk-exynos-clkout.o
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obj-$(CONFIG_EXYNOS_ARM64_COMMON_CLK) += clk-exynos7.o
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obj-$(CONFIG_S3C2410_COMMON_CLK)+= clk-s3c2410.o
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obj-$(CONFIG_S3C2410_COMMON_DCLK)+= clk-s3c2410-dclk.o
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|
|
|
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@ -9,10 +9,13 @@
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/syscore_ops.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#define EXYNOS_CLKOUT_NR_CLKS 1
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#define EXYNOS_CLKOUT_PARENTS 32
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|
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@ -28,41 +31,103 @@ struct exynos_clkout {
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struct clk_mux mux;
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spinlock_t slock;
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void __iomem *reg;
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struct device_node *np;
|
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u32 pmu_debug_save;
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struct clk_hw_onecell_data data;
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};
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static struct exynos_clkout *clkout;
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struct exynos_clkout_variant {
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u32 mux_mask;
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};
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|
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static int exynos_clkout_suspend(void)
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static const struct exynos_clkout_variant exynos_clkout_exynos4 = {
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.mux_mask = EXYNOS4_CLKOUT_MUX_MASK,
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};
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static const struct exynos_clkout_variant exynos_clkout_exynos5 = {
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.mux_mask = EXYNOS5_CLKOUT_MUX_MASK,
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};
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static const struct of_device_id exynos_clkout_ids[] = {
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{
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.compatible = "samsung,exynos3250-pmu",
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.data = &exynos_clkout_exynos4,
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}, {
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.compatible = "samsung,exynos4210-pmu",
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.data = &exynos_clkout_exynos4,
|
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}, {
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.compatible = "samsung,exynos4412-pmu",
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.data = &exynos_clkout_exynos4,
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}, {
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.compatible = "samsung,exynos5250-pmu",
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.data = &exynos_clkout_exynos5,
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}, {
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.compatible = "samsung,exynos5410-pmu",
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.data = &exynos_clkout_exynos5,
|
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}, {
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.compatible = "samsung,exynos5420-pmu",
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.data = &exynos_clkout_exynos5,
|
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}, {
|
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.compatible = "samsung,exynos5433-pmu",
|
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.data = &exynos_clkout_exynos5,
|
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}, { }
|
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};
|
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MODULE_DEVICE_TABLE(of, exynos_clkout_ids);
|
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|
||||
/*
|
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* Device will be instantiated as child of PMU device without its own
|
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* device node. Therefore match compatibles against parent.
|
||||
*/
|
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static int exynos_clkout_match_parent_dev(struct device *dev, u32 *mux_mask)
|
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{
|
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clkout->pmu_debug_save = readl(clkout->reg + EXYNOS_PMU_DEBUG_REG);
|
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const struct exynos_clkout_variant *variant;
|
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const struct of_device_id *match;
|
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|
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if (!dev->parent) {
|
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dev_err(dev, "not instantiated from MFD\n");
|
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return -EINVAL;
|
||||
}
|
||||
|
||||
match = of_match_device(exynos_clkout_ids, dev->parent);
|
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if (!match) {
|
||||
dev_err(dev, "cannot match parent device\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
variant = match->data;
|
||||
|
||||
*mux_mask = variant->mux_mask;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void exynos_clkout_resume(void)
|
||||
{
|
||||
writel(clkout->pmu_debug_save, clkout->reg + EXYNOS_PMU_DEBUG_REG);
|
||||
}
|
||||
|
||||
static struct syscore_ops exynos_clkout_syscore_ops = {
|
||||
.suspend = exynos_clkout_suspend,
|
||||
.resume = exynos_clkout_resume,
|
||||
};
|
||||
|
||||
static void __init exynos_clkout_init(struct device_node *node, u32 mux_mask)
|
||||
static int exynos_clkout_probe(struct platform_device *pdev)
|
||||
{
|
||||
const char *parent_names[EXYNOS_CLKOUT_PARENTS];
|
||||
struct clk *parents[EXYNOS_CLKOUT_PARENTS];
|
||||
int parent_count;
|
||||
int ret;
|
||||
int i;
|
||||
struct exynos_clkout *clkout;
|
||||
int parent_count, ret, i;
|
||||
u32 mux_mask;
|
||||
|
||||
clkout = kzalloc(struct_size(clkout, data.hws, EXYNOS_CLKOUT_NR_CLKS),
|
||||
GFP_KERNEL);
|
||||
clkout = devm_kzalloc(&pdev->dev,
|
||||
struct_size(clkout, data.hws, EXYNOS_CLKOUT_NR_CLKS),
|
||||
GFP_KERNEL);
|
||||
if (!clkout)
|
||||
return;
|
||||
return -ENOMEM;
|
||||
|
||||
ret = exynos_clkout_match_parent_dev(&pdev->dev, &mux_mask);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
clkout->np = pdev->dev.of_node;
|
||||
if (!clkout->np) {
|
||||
/*
|
||||
* pdev->dev.parent was checked by exynos_clkout_match_parent_dev()
|
||||
* so it is not NULL.
|
||||
*/
|
||||
clkout->np = pdev->dev.parent->of_node;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, clkout);
|
||||
|
||||
spin_lock_init(&clkout->slock);
|
||||
|
||||
|
|
@ -71,7 +136,7 @@ static void __init exynos_clkout_init(struct device_node *node, u32 mux_mask)
|
|||
char name[] = "clkoutXX";
|
||||
|
||||
snprintf(name, sizeof(name), "clkout%d", i);
|
||||
parents[i] = of_clk_get_by_name(node, name);
|
||||
parents[i] = of_clk_get_by_name(clkout->np, name);
|
||||
if (IS_ERR(parents[i])) {
|
||||
parent_names[i] = "none";
|
||||
continue;
|
||||
|
|
@ -82,11 +147,13 @@ static void __init exynos_clkout_init(struct device_node *node, u32 mux_mask)
|
|||
}
|
||||
|
||||
if (!parent_count)
|
||||
goto free_clkout;
|
||||
return -EINVAL;
|
||||
|
||||
clkout->reg = of_iomap(node, 0);
|
||||
if (!clkout->reg)
|
||||
clkout->reg = of_iomap(clkout->np, 0);
|
||||
if (!clkout->reg) {
|
||||
ret = -ENODEV;
|
||||
goto clks_put;
|
||||
}
|
||||
|
||||
clkout->gate.reg = clkout->reg + EXYNOS_PMU_DEBUG_REG;
|
||||
clkout->gate.bit_idx = EXYNOS_CLKOUT_DISABLE_SHIFT;
|
||||
|
|
@ -103,17 +170,17 @@ static void __init exynos_clkout_init(struct device_node *node, u32 mux_mask)
|
|||
&clk_mux_ops, NULL, NULL, &clkout->gate.hw,
|
||||
&clk_gate_ops, CLK_SET_RATE_PARENT
|
||||
| CLK_SET_RATE_NO_REPARENT);
|
||||
if (IS_ERR(clkout->data.hws[0]))
|
||||
if (IS_ERR(clkout->data.hws[0])) {
|
||||
ret = PTR_ERR(clkout->data.hws[0]);
|
||||
goto err_unmap;
|
||||
}
|
||||
|
||||
clkout->data.num = EXYNOS_CLKOUT_NR_CLKS;
|
||||
ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, &clkout->data);
|
||||
ret = of_clk_add_hw_provider(clkout->np, of_clk_hw_onecell_get, &clkout->data);
|
||||
if (ret)
|
||||
goto err_clk_unreg;
|
||||
|
||||
register_syscore_ops(&exynos_clkout_syscore_ops);
|
||||
|
||||
return;
|
||||
return 0;
|
||||
|
||||
err_clk_unreg:
|
||||
clk_hw_unregister(clkout->data.hws[0]);
|
||||
|
|
@ -123,38 +190,56 @@ static void __init exynos_clkout_init(struct device_node *node, u32 mux_mask)
|
|||
for (i = 0; i < EXYNOS_CLKOUT_PARENTS; ++i)
|
||||
if (!IS_ERR(parents[i]))
|
||||
clk_put(parents[i]);
|
||||
free_clkout:
|
||||
kfree(clkout);
|
||||
|
||||
pr_err("%s: failed to register clkout clock\n", __func__);
|
||||
dev_err(&pdev->dev, "failed to register clkout clock\n");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* We use CLK_OF_DECLARE_DRIVER initialization method to avoid setting
|
||||
* the OF_POPULATED flag on the pmu device tree node, so later the
|
||||
* Exynos PMU platform device can be properly probed with PMU driver.
|
||||
*/
|
||||
|
||||
static void __init exynos4_clkout_init(struct device_node *node)
|
||||
static int exynos_clkout_remove(struct platform_device *pdev)
|
||||
{
|
||||
exynos_clkout_init(node, EXYNOS4_CLKOUT_MUX_MASK);
|
||||
}
|
||||
CLK_OF_DECLARE_DRIVER(exynos4210_clkout, "samsung,exynos4210-pmu",
|
||||
exynos4_clkout_init);
|
||||
CLK_OF_DECLARE_DRIVER(exynos4412_clkout, "samsung,exynos4412-pmu",
|
||||
exynos4_clkout_init);
|
||||
CLK_OF_DECLARE_DRIVER(exynos3250_clkout, "samsung,exynos3250-pmu",
|
||||
exynos4_clkout_init);
|
||||
struct exynos_clkout *clkout = platform_get_drvdata(pdev);
|
||||
|
||||
static void __init exynos5_clkout_init(struct device_node *node)
|
||||
{
|
||||
exynos_clkout_init(node, EXYNOS5_CLKOUT_MUX_MASK);
|
||||
of_clk_del_provider(clkout->np);
|
||||
clk_hw_unregister(clkout->data.hws[0]);
|
||||
iounmap(clkout->reg);
|
||||
|
||||
return 0;
|
||||
}
|
||||
CLK_OF_DECLARE_DRIVER(exynos5250_clkout, "samsung,exynos5250-pmu",
|
||||
exynos5_clkout_init);
|
||||
CLK_OF_DECLARE_DRIVER(exynos5410_clkout, "samsung,exynos5410-pmu",
|
||||
exynos5_clkout_init);
|
||||
CLK_OF_DECLARE_DRIVER(exynos5420_clkout, "samsung,exynos5420-pmu",
|
||||
exynos5_clkout_init);
|
||||
CLK_OF_DECLARE_DRIVER(exynos5433_clkout, "samsung,exynos5433-pmu",
|
||||
exynos5_clkout_init);
|
||||
|
||||
static int exynos_clkout_suspend(struct device *dev)
|
||||
{
|
||||
struct exynos_clkout *clkout = dev_get_drvdata(dev);
|
||||
|
||||
clkout->pmu_debug_save = readl(clkout->reg + EXYNOS_PMU_DEBUG_REG);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int exynos_clkout_resume(struct device *dev)
|
||||
{
|
||||
struct exynos_clkout *clkout = dev_get_drvdata(dev);
|
||||
|
||||
writel(clkout->pmu_debug_save, clkout->reg + EXYNOS_PMU_DEBUG_REG);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(exynos_clkout_pm_ops, exynos_clkout_suspend,
|
||||
exynos_clkout_resume);
|
||||
|
||||
static struct platform_driver exynos_clkout_driver = {
|
||||
.driver = {
|
||||
.name = "exynos-clkout",
|
||||
.of_match_table = exynos_clkout_ids,
|
||||
.pm = &exynos_clkout_pm_ops,
|
||||
},
|
||||
.probe = exynos_clkout_probe,
|
||||
.remove = exynos_clkout_remove,
|
||||
};
|
||||
module_platform_driver(exynos_clkout_driver);
|
||||
|
||||
MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
|
||||
MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
|
||||
MODULE_DESCRIPTION("Samsung Exynos clock output driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
|
|
@ -155,8 +155,7 @@ static int __init bl_idle_driver_init(struct cpuidle_driver *drv, int part_id)
|
|||
|
||||
static const struct of_device_id compatible_machine_match[] = {
|
||||
{ .compatible = "arm,vexpress,v2p-ca15_a7" },
|
||||
{ .compatible = "samsung,exynos5420" },
|
||||
{ .compatible = "samsung,exynos5800" },
|
||||
{ .compatible = "google,peach" },
|
||||
{},
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -8,6 +8,7 @@
|
|||
#include <linux/of.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/mfd/core.h>
|
||||
#include <linux/mfd/syscon.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/delay.h>
|
||||
|
|
@ -97,6 +98,10 @@ static const struct of_device_id exynos_pmu_of_device_ids[] = {
|
|||
{ /*sentinel*/ },
|
||||
};
|
||||
|
||||
static const struct mfd_cell exynos_pmu_devs[] = {
|
||||
{ .name = "exynos-clkout", },
|
||||
};
|
||||
|
||||
struct regmap *exynos_get_pmu_regmap(void)
|
||||
{
|
||||
struct device_node *np = of_find_matching_node(NULL,
|
||||
|
|
@ -110,6 +115,7 @@ EXPORT_SYMBOL_GPL(exynos_get_pmu_regmap);
|
|||
static int exynos_pmu_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
int ret;
|
||||
|
||||
pmu_base_addr = devm_platform_ioremap_resource(pdev, 0);
|
||||
if (IS_ERR(pmu_base_addr))
|
||||
|
|
@ -128,6 +134,11 @@ static int exynos_pmu_probe(struct platform_device *pdev)
|
|||
|
||||
platform_set_drvdata(pdev, pmu_context);
|
||||
|
||||
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, exynos_pmu_devs,
|
||||
ARRAY_SIZE(exynos_pmu_devs), NULL, 0, NULL);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (devm_of_platform_populate(dev))
|
||||
dev_err(dev, "Error populating children, reboot and poweroff might not work properly\n");
|
||||
|
||||
|
|
|
|||
|
|
@ -383,7 +383,7 @@ static int __asv_offset_voltage(unsigned int index)
|
|||
return 25000;
|
||||
default:
|
||||
return 0;
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
static void exynos5422_asv_offset_voltage_setup(struct exynos_asv *asv)
|
||||
|
|
|
|||
|
|
@ -151,7 +151,7 @@ static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
|
|||
/**
|
||||
* s3c_pm_runcheck() - helper to check a resource on restore.
|
||||
* @res: The resource to check
|
||||
* @vak: Pointer to list of CRC32 values to check.
|
||||
* @val: Pointer to list of CRC32 values to check.
|
||||
*
|
||||
* Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this
|
||||
* function runs the given memory resource checking it against the stored
|
||||
|
|
|
|||
|
|
@ -254,7 +254,7 @@
|
|||
* serial port
|
||||
*
|
||||
* the pointer is setup by the machine specific initialisation from the
|
||||
* arch/arm/mach-s3c2410/ directory.
|
||||
* arch/arm/mach-s3c/ directory.
|
||||
*/
|
||||
|
||||
struct s3c2410_uartcfg {
|
||||
|
|
|
|||
Loading…
Reference in a new issue