From: Wenyou Yang <wenyou.yang@atmel.com>
To: <nicolas.ferre@atmel.com>, <linux@maxim.org.za>,
<linux@arm.linux.org.uk>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <sylvain.rochet@finsecur.com>,
<alexandre.belloni@free-electrons.com>,
<patrice.vilchez@atmel.com>, <sergei.shtylyov@cogentembedded.com>,
<mark.rutland@arm.com>, <lorenzo.pieralisi@arm.com>,
<wenyou.yang@atmel.com>
Subject: [PATCH 3/3] pm: at91: flush data cache and clean, invalidate and disable the L2 cache
Date: Thu, 12 Feb 2015 10:52:58 +0800 [thread overview]
Message-ID: <1423709578-8475-1-git-send-email-wenyou.yang@atmel.com> (raw)
In-Reply-To: <1423709441-8342-1-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 9075b41..2574bad 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>
@@ -145,8 +146,13 @@ 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:[~2015-02-12 3:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-12 2:50 [PATCH 0/3] AT91 pm fixes for 3.21 Wenyou Yang
2015-02-12 2:51 ` [PATCH 1/3] pm: at91: pm_suspend: add the WFI instruction support for ARMv7 Wenyou Yang
2015-02-17 10:22 ` Alexandre Belloni
2015-02-12 2:52 ` [PATCH 2/3] pm: at91: pm_suspend: MOR register KEY was missing Wenyou Yang
2015-02-17 10:24 ` Alexandre Belloni
2015-02-12 2:52 ` Wenyou Yang [this message]
2015-02-17 10:25 ` [PATCH 3/3] pm: at91: flush data cache and clean, invalidate and disable the L2 cache Alexandre Belloni
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