[ARM] 3802/1: S3C24XX: PM tidy up cache flushing

[~andy/linux] / arch / arm / mach-s3c2410 / pm.c

diff --git a/arch/arm/mach-s3c2410/pm.c b/arch/arm/mach-s3c2410/pm.c
index 164a5b5847d7cc0b30d69ef53dd0afdb95984dad..46dedd37f438fe008f650a07d61d85bd08d132e9 100644 (file)
--- 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 @@ static int s3c2410_pm_enter(suspend_state_t state)
 
        /* flush cache back to ram */
 
-       arm920_flush_kern_cache_all();
+       flush_cache_all();
 
        s3c2410_pm_check_store();
 
@@ -575,7 +568,14 @@ static int s3c2410_pm_enter(suspend_state_t state)
 
        __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 */