From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Thu, 10 Dec 2020 22:25:24 +0100
Subject: ARM: dts: exynos: correct PMIC interrupt trigger level on SMDK5250
Git-commit: f6368c60561370e4a92fac22982a3bd656172170
Patch-mainline: v5.13-rc1
References: git-fixes

The Maxim PMIC datasheets describe the interrupt line as active low
with a requirement of acknowledge from the CPU.  Without specifying the
interrupt type in Devicetree, kernel might apply some fixed
configuration, not necessarily working for this hardware.

Additionally, the interrupt line is shared so using level sensitive
interrupt is here especially important to avoid races.

Fixes: 47580e8d94c2 ("ARM: dts: Specify MAX77686 pmic interrupt for exynos5250-smdk5250")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-8-krzk@kernel.org

Acked-by: Ivan T. Ivanov <iivanov@suse.de>
---
 arch/arm/boot/dts/exynos5250-smdk5250.dts |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -133,7 +133,7 @@
 		compatible = "maxim,max77686";
 		reg = <0x09>;
 		interrupt-parent = <&gpx3>;
-		interrupts = <2 IRQ_TYPE_NONE>;
+		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&max77686_irq>;
 		wakeup-source;