ARM: mach-shmobile: sh7372 generic suspend/resume support

Convert the sh7372 Core Standby code to make use
of the new generic ARM cpu suspend/resume code.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 16 insertions, 20 deletions

diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c
index ac47bfcd287e..aa7d352920d4 100644
--- a/arch/arm/mach-shmobile/pm-sh7372.c
+++ b/arch/arm/mach-shmobile/pm-sh7372.c
@@ -21,6 +21,7 @@
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/tlbflush.h>
+#include <asm/suspend.h>
 #include <mach/common.h>
 #include <mach/sh7372.h>
 
@@ -152,30 +153,25 @@ struct sh7372_pm_domain sh7372_a3sg = {
 
 #endif /* CONFIG_PM */
 
-static void sh7372_enter_core_standby(void)
+static int sh7372_do_idle_core_standby(unsigned long unused)
 {
-        void __iomem *smfram = (void __iomem *)SMFRAM;
-
-        __raw_writel(0, APARMBAREA); /* translate 4k */
-        __raw_writel(__pa(sh7372_cpu_resume), SBAR); /* set reset vector */
-        __raw_writel(0x10, SYSTBCR); /* enable core standby */
-
-        __raw_writel(0, smfram + 0x3c); /* clear page table address */
-
-        sh7372_cpu_suspend();
-        cpu_init();
+        cpu_do_idle(); /* WFI when SYSTBCR == 0x10 -> Core Standby */
+        return 0;
+}
 
-        /* if page table address is non-NULL then we have been powered down */
-        if (__raw_readl(smfram + 0x3c)) {
-                __raw_writel(__raw_readl(smfram + 0x40),
-                             __va(__raw_readl(smfram + 0x3c)));
+static void sh7372_enter_core_standby(void)
+{
+        /* set reset vector, translate 4k */
+        __raw_writel(__pa(sh7372_resume_core_standby), SBAR);
+        __raw_writel(0, APARMBAREA);
 
-                flush_tlb_all();
-                set_cr(__raw_readl(smfram + 0x38));
-        }
+        /* enter sleep mode with SYSTBCR to 0x10 */
+        __raw_writel(0x10, SYSTBCR);
+        cpu_suspend(0, sh7372_do_idle_core_standby);
+        __raw_writel(0, SYSTBCR);
 
-        __raw_writel(0, SYSTBCR); /* disable core standby */
-        __raw_writel(0, SBAR); /* disable reset vector translation */
+         /* disable reset vector translation */
+        __raw_writel(0, SBAR);
 }
 
 #ifdef CONFIG_CPU_IDLE