linux-kernel - [PATCH v3] ARM: imx6: disable the GIC CPU interface before calling stby-poweroff sequence

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Message-Id: <20210928134940.1329-1-o.rempel@pengutronix.de>
Date:   Tue, 28 Sep 2021 15:49:40 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Fabio Estevam <festevam@...il.com>, linux-imx@....com
Subject: [PATCH v3] ARM: imx6: disable the GIC CPU interface before calling stby-poweroff sequence

Any pending interrupt can prevent entering standby based power off state.
To avoid it, disable the GIC CPU interface.

Fixes: 8148d2136002 ("ARM: imx6: register pm_power_off handler if "fsl,pmic-stby-poweroff" is set")
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 arch/arm/mach-imx/pm-imx6.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-imx/pm-imx6.c b/arch/arm/mach-imx/pm-imx6.c
index 9244437cb1b9..f2ecca339910 100644
--- a/arch/arm/mach-imx/pm-imx6.c
+++ b/arch/arm/mach-imx/pm-imx6.c
@@ -10,6 +10,7 @@
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/genalloc.h>
+#include <linux/irqchip/arm-gic.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <linux/of.h>
@@ -619,6 +620,7 @@ static void __init imx6_pm_common_init(const struct imx6_pm_socdata
 
 static void imx6_pm_stby_poweroff(void)
 {
+	gic_cpu_if_down(0);
 	imx6_set_lpm(STOP_POWER_OFF);
 	imx6q_suspend_finish(0);
 
-- 
2.30.2