[PATCH 4.4 077/190] ARM: dts: exynos: correct PMIC interrupt trigger level on SMDK5250

[Greg Kroah-Hartman]

From: Krzysztof Kozlowski <krzk@xxxxxxxxxx>

[ Upstream commit f6368c60561370e4a92fac22982a3bd656172170 ]

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@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201210212534.216197-8-krzk@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/arm/boot/dts/exynos5250-smdk5250.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index 0f5dcd418af8..97b152e43f9c 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -134,7 +134,7 @@
 		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;
-- 
2.30.2