ARM: dts: exynos: correct PMIC interrupt trigger level on SMDK5250

[ 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@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-8-krzk@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index d5e66189ed2a006d5838342c0fb38deb93b714e9..594b246afbedcc8b214e194a674f6e7e0f1924ba 100644 (file)
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -132,7 +132,7 @@
                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;