[ARM] 3802/1: S3C24XX: PM tidy up cache flushing
Change to using flush_cache_all() in pm.c and
also remove the need to flush the cache in the
PM code.
This changes the sleep.S code to have an entry
to store the registers for resume, and then a
second entry (after the caches are cleaned)
to do the suspend and resume.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-s3c2410/pm.c b/arch/arm/mach-s3c2410/pm.c
index 164a5b5..46dedd3 100644
--- a/arch/arm/mach-s3c2410/pm.c
+++ b/arch/arm/mach-s3c2410/pm.c
@@ -35,6 +35,7 @@
#include <linux/ioport.h>
#include <linux/delay.h>
+#include <asm/cacheflush.h>
#include <asm/hardware.h>
#include <asm/io.h>
@@ -52,14 +53,6 @@
unsigned long s3c_pm_flags;
-/* cache functions from arch/arm/mm/proc-arm920.S */
-
-#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
-extern void arm920_flush_kern_cache_all(void);
-#else
-static void arm920_flush_kern_cache_all(void) { }
-#endif
-
#define PFX "s3c24xx-pm: "
static struct sleep_save core_save[] = {
@@ -567,7 +560,7 @@
/* flush cache back to ram */
- arm920_flush_kern_cache_all();
+ flush_cache_all();
s3c2410_pm_check_store();
@@ -575,7 +568,14 @@
__raw_writel(0x00, S3C2410_CLKCON); /* turn off clocks over sleep */
- s3c2410_cpu_suspend(regs_save);
+ /* s3c2410_cpu_save will also act as our return point from when
+ * we resume as it saves its own register state, so use the return
+ * code to differentiate return from save and return from sleep */
+
+ if (s3c2410_cpu_save(regs_save) == 0) {
+ flush_cache_all();
+ s3c2410_cpu_suspend();
+ }
/* restore the cpu state */