linux-kernel - [PATCH 2/3] pm: at91: pm_suspend: MOR register KEY was missing

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Message-ID: <1423709533-8416-1-git-send-email-wenyou.yang@atmel.com>
Date:	Thu, 12 Feb 2015 10:52:13 +0800
From:	Wenyou Yang <wenyou.yang@...el.com>
To:	<nicolas.ferre@...el.com>, <linux@...im.org.za>,
	<linux@....linux.org.uk>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <sylvain.rochet@...secur.com>,
	<alexandre.belloni@...e-electrons.com>,
	<patrice.vilchez@...el.com>, <sergei.shtylyov@...entembedded.com>,
	<mark.rutland@....com>, <lorenzo.pieralisi@....com>,
	<wenyou.yang@...el.com>
Subject: [PATCH 2/3] pm: at91: pm_suspend: MOR register KEY was missing

From: Patrice Vilchez <patrice.vilchez@...el.com>

Because writing the MOR register requires the PASSWD(0x37),
if missed, the write operation will be aborted.

Signed-off-by: Patrice Vilchez <patrice.vilchez@...el.com>
---
 arch/arm/mach-at91/pm_suspend.S |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 1c7256a..5347ad4 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -132,6 +132,7 @@ ENTRY(at91_pm_suspend_in_sram)
 	/* Turn off the main oscillator */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
 	bic	tmp1, tmp1, #AT91_PMC_MOSCEN
+	orr	tmp1, tmp1, #AT91_PMC_KEY
 	str	tmp1, [pmc, #AT91_CKGR_MOR]
 
 skip_disable_main_clock:
@@ -149,6 +150,7 @@ skip_disable_main_clock:
 	/* Turn on the main oscillator */
 	ldr	tmp1, [pmc, #AT91_CKGR_MOR]
 	orr	tmp1, tmp1, #AT91_PMC_MOSCEN
+	orr	tmp1, tmp1, #AT91_PMC_KEY
 	str	tmp1, [pmc, #AT91_CKGR_MOR]
 
 	wait_moscrdy
-- 
1.7.9.5

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