diff options
Diffstat (limited to 'arch/arm/mach-at91/pm.c')
| -rw-r--r-- | arch/arm/mach-at91/pm.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 615668986480..dafbacc25eb1 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: |