From: Krzysztof Kozlowski krzk@kernel.org
[ 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 --- 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;