From: wenyou.yang@atmel.com (Wenyou Yang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2.0 2/2] pm: at91: flush data cache and clean, invalidate and disable the L2 cache
Date: Mon, 9 Mar 2015 11:54:26 +0800 [thread overview]
Message-ID: <1425873266-8192-1-git-send-email-wenyou.yang@atmel.com> (raw)
In-Reply-To: <1425873187-8096-1-git-send-email-wenyou.yang@atmel.com>
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>
---
arch/arm/mach-at91/pm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 9fb868d..ac947cd 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)
--
1.7.9.5
next prev parent reply other threads:[~2015-03-09 3:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-09 3:53 [PATCH v2.0 0/2] ARM: at91: Add pm support for sama5d3 and sama5d4 Wenyou Yang
2015-03-09 3:53 ` [PATCH v2.0 1/2] pm: at91: pm_suspend: add the WFI instruction support for ARMv7 Wenyou Yang
2015-03-09 3:54 ` Wenyou Yang [this message]
2015-03-12 18:59 ` [PATCH v2.0 0/2] ARM: at91: Add pm support for sama5d3 and sama5d4 Sylvain Rochet
2015-03-13 13:40 ` Nicolas Ferre
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