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ARM: at91/pm: flush data cache and clean, invalidate and disable the L2 cache 

Flush data cache, and clean, invalidate and disable the L2 cache before going to suspend.
Restore the L2 cache configuration and re-enable the L2 cache after waking up.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Wenyou Yang 2015-03-09 11:54:26 +08:00 committed by Nicolas Ferre
parent 20567658b8
commit 385acc0dac
1 changed files with 6 additions and 0 deletions
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6
arch/arm/mach-at91/pm.c
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@ -30,6 +30,7 @@
#include <asm/mach/time.h>
#include <asm/mach/irq.h>
#include <asm/fncpy.h>
#include <asm/cacheflush.h>
#include <mach/cpu.h>
#include <mach/hardware.h>
@ -133,8 +134,13 @@ static void at91_pm_suspend(suspend_state_t state)
pm_data |= (state == PM_SUSPEND_MEM) ?
AT91_PM_MODE(AT91_PM_SLOW_CLOCK) : 0;
flush_cache_all();
outer_disable();
at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0],
at91_ramc_base[1], pm_data);
outer_resume();
}
static int at91_pm_enter(suspend_state_t state)