Commit 385acc0d authored Mar 09, 2015 by Wenyou Yang Committed by Nicolas Ferre Mar 13, 2015

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>

parent 20567658

arch/arm/mach-at91/pm.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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)