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-rw-r--r--arch/arm/mach-at91/pm.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 61566898648..dafbacc25eb 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -258,16 +258,23 @@ static int at91_pm_enter(suspend_state_t state)
* NOTE: the Wait-for-Interrupt instruction needs to be
* in icache so no SDRAM accesses are needed until the
* wakeup IRQ occurs and self-refresh is terminated.
+ * For ARM 926 based chips, this requirement is weaker
+ * as at91sam9 can access a RAM in self-refresh mode.
*/
- asm("b 1f; .align 5; 1:");
- asm("mcr p15, 0, r0, c7, c10, 4"); /* drain write buffer */
+ asm volatile ( "mov r0, #0\n\t"
+ "b 1f\n\t"
+ ".align 5\n\t"
+ "1: mcr p15, 0, r0, c7, c10, 4\n\t"
+ : /* no output */
+ : /* no input */
+ : "r0");
saved_lpr = sdram_selfrefresh_enable();
- asm("mcr p15, 0, r0, c7, c0, 4"); /* wait for interrupt */
+ wait_for_interrupt_enable();
sdram_selfrefresh_disable(saved_lpr);
break;
case PM_SUSPEND_ON:
- asm("mcr p15, 0, r0, c7, c0, 4"); /* wait for interrupt */
+ cpu_do_idle();
break;
default: