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ARM: s5pv210: use private pm save/restore

Browse Source 
The pm save/restore code is fairly small, so in order to
separate the s3c and s5p platforms, adding an s5p specific
copy instead of sharing it is actually easier.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20200806182059.2431-17-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Arnd Bergmann 2020-08-06 20:20:34 +02:00 committed by Krzysztof Kozlowski
parent 17132da70e
commit 423c62bfb6
5 changed files with 47 additions and 14 deletions
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7
arch/arm/mach-s5pv210/Makefile
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@ -3,12 +3,5 @@
# Copyright (c) 2010 Samsung Electronics Co., Ltd.
# http://www.samsung.com/
ccflags-$(CONFIG_ARCH_MULTIPLATFORM) += -I$(srctree)/arch/arm/plat-samsung/include
# Core
obj-$(CONFIG_PM_SLEEP) += pm.o sleep.o
# machine support
obj-y += s5pv210.o

45
arch/arm/mach-s5pv210/pm.c
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@ -13,15 +13,56 @@
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/io.h>
#include <linux/soc/samsung/s3c-pm.h>
#include <asm/cacheflush.h>
#include <asm/suspend.h>
#include <plat/pm-common.h>
#include "common.h"
#include "regs-clock.h"
/* helper functions to save and restore register state */
struct sleep_save {
void __iomem *reg;
unsigned long val;
};
#define SAVE_ITEM(x) \
{ .reg = (x) }
/**
* s3c_pm_do_save() - save a set of registers for restoration on resume.
* @ptr: Pointer to an array of registers.
* @count: Size of the ptr array.
*
* Run through the list of registers given, saving their contents in the
* array for later restoration when we wakeup.
*/
static void s3c_pm_do_save(struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++) {
ptr->val = readl_relaxed(ptr->reg);
S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
}
}
/**
* s3c_pm_do_restore() - restore register values from the save list.
* @ptr: Pointer to an array of registers.
* @count: Size of the ptr array.
*
* Restore the register values saved from s3c_pm_do_save().
*
* WARNING: Do not put any debug in here that may effect memory or use
* peripherals, as things may be changing!
*/
static void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count)
{
for (; count > 0; count--, ptr++)
writel_relaxed(ptr->val, ptr->reg);
}
static struct sleep_save s5pv210_core_save[] = {
/* Clock ETC */
SAVE_ITEM(S5P_MDNIE_SEL),

4
arch/arm/mach-s5pv210/regs-clock.h
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@ -9,7 +9,9 @@
#ifndef __ASM_ARCH_REGS_CLOCK_H
#define __ASM_ARCH_REGS_CLOCK_H __FILE__
#include <plat/map-base.h>
#define S3C_ADDR_BASE 0xF6000000
#define S3C_ADDR(x) ((void __iomem __force *)S3C_ADDR_BASE + (x))
#define S3C_VA_SYS S3C_ADDR(0x00100000)
#define S5P_CLKREG(x) (S3C_VA_SYS + (x))

2
arch/arm/mach-s5pv210/s5pv210.c
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@ -13,8 +13,6 @@
#include <asm/mach/map.h>
#include <asm/system_misc.h>
#include <plat/map-base.h>
#include "common.h"
#include "regs-clock.h"

3
arch/arm/plat-samsung/Makefile
View File

@ -24,8 +24,7 @@ obj-$(CONFIG_GPIO_SAMSUNG) += gpio-samsung.o
# PM support
obj-$(CONFIG_PM_SLEEP) += pm-common.o
obj-$(CONFIG_SAMSUNG_PM) += pm.o
obj-$(CONFIG_SAMSUNG_PM) += pm.o pm-common.o
obj-$(CONFIG_SAMSUNG_PM_GPIO) += pm-gpio.o
obj-$(CONFIG_SAMSUNG_WAKEMASK) += wakeup-mask.o