From 385acc0dac88d79447a03a1363072fc258429dec Mon Sep 17 00:00:00 2001
From: Wenyou Yang <wenyou.yang@atmel.com>
Date: Mon, 9 Mar 2015 11:54:26 +0800
Subject: 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>
---
 arch/arm/mach-at91/pm.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'arch/arm/mach-at91')

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 9fb868d2b9da..ac947cdd506c 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -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)
-- 
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