linux-kernel - [PATCH V2 2/2] ARM: imx: enable WAIT mode hardware workaround for imx6sx

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Date:   Mon, 29 Aug 2016 21:49:57 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <shawnguo@...nel.org>, <kernel@...gutronix.de>,
        <fabio.estevam@....com>, <linux@...linux.org.uk>
Subject: [PATCH V2 2/2] ARM: imx: enable WAIT mode hardware workaround for imx6sx

Need to enable INT_MEM_CLK_LPM bit in CCM_CGPR for WAIT mode,
without this bit set, if there is pending interrupt during
ARM platform entering WAIT mode without power gating, cache
data will be corrupted, this is a hardware workaround for WAIT
mode and must be enabled.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
changes since V1:
	function name is changed in 1/2 patch, change it accordingly.
 arch/arm/mach-imx/cpuidle-imx6sx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c
index 3c6672b..261aaa4 100644
--- a/arch/arm/mach-imx/cpuidle-imx6sx.c
+++ b/arch/arm/mach-imx/cpuidle-imx6sx.c
@@ -90,6 +90,7 @@ static struct cpuidle_driver imx6sx_cpuidle_driver = {
 
 int __init imx6sx_cpuidle_init(void)
 {
+	imx6_set_int_mem_clk_lpm(true);
 	imx6_enable_rbc(false);
 	/*
 	 * set ARM power up/down timing to the fastest,
-- 
1.9.1