[PATCH 10/36] ARM: s5pv210: use private pm save/restore

Arnd Bergmann
2019-10-10T20:36:34Z

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>
---
arch/arm/mach-s5pv210/Makefile | 7 -----
arch/arm/mach-s5pv210/pm.c | 45 ++++++++++++++++++++++++++++--
arch/arm/mach-s5pv210/regs-clock.h | 2 +-
arch/arm/mach-s5pv210/s5pv210.c | 2 --
arch/arm/plat-samsung/Makefile | 4 +--
5 files changed, 45 insertions(+), 15 deletions(-)

diff --git a/arch/arm/mach-s5pv210/Makefile b/arch/arm/mach-s5pv210/Makefile
index e7b551e18e5c..aa0a1f091daf 100644
--- a/arch/arm/mach-s5pv210/Makefile
+++ b/arch/arm/mach-s5pv210/Makefile
@@ -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
diff --git a/arch/arm/mach-s5pv210/pm.c b/arch/arm/mach-s5pv210/pm.c
index efdb5a27c060..d59c094cdea8 100644
--- a/arch/arm/mach-s5pv210/pm.c
+++ b/arch/arm/mach-s5pv210/pm.c
@@ -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),
diff --git a/arch/arm/mach-s5pv210/regs-clock.h b/arch/arm/mach-s5pv210/regs-clock.h
index 2a35c831a9b0..8c7530614e37 100644
--- a/arch/arm/mach-s5pv210/regs-clock.h
+++ b/arch/arm/mach-s5pv210/regs-clock.h
@@ -9,7 +9,7 @@
#ifndef __ASM_ARCH_REGS_CLOCK_H
#define __ASM_ARCH_REGS_CLOCK_H __FILE__

-#include <plat/map-base.h>
+#define S3C_VA_SYS ((void __iomem __force *)0xF6100000)

#define S5P_CLKREG(x) (S3C_VA_SYS + (x))

diff --git a/arch/arm/mach-s5pv210/s5pv210.c b/arch/arm/mach-s5pv210/s5pv210.c
index 868f9c20419d..a21ed3bb992a 100644
--- a/arch/arm/mach-s5pv210/s5pv210.c
+++ b/arch/arm/mach-s5pv210/s5pv210.c
@@ -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"

diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index d88b9b84f3a9..025ce22876c1 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -24,9 +24,7 @@ obj-$(CONFIG_GPIO_SAMSUNG) += gpio-samsung.o

# PM support

-obj-$(CONFIG_PM_SLEEP) += pm-common.o
-obj-$(CONFIG_EXYNOS_CPU_SUSPEND) += 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
--
2.20.0