From: Krzysztof Kozlowski krzk@kernel.org
[ Upstream commit 8987efbb17c2522be8615085df9a14da2ab53d34 ]
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: c61248afa819 ("ARM: dts: Add max77686 RTC interrupt to cros5250-common") Signed-off-by: Krzysztof Kozlowski krzk@kernel.org Link: https://lore.kernel.org/r/20201210212534.216197-9-krzk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/boot/dts/exynos5250-snow-common.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/exynos5250-snow-common.dtsi b/arch/arm/boot/dts/exynos5250-snow-common.dtsi index d5d51916bb74..b24a77781e75 100644 --- a/arch/arm/boot/dts/exynos5250-snow-common.dtsi +++ b/arch/arm/boot/dts/exynos5250-snow-common.dtsi @@ -280,7 +280,7 @@ max77686: max77686@09 { compatible = "maxim,max77686"; interrupt-parent = <&gpx3>; - interrupts = <2 IRQ_TYPE_NONE>; + interrupts = <2 IRQ_TYPE_LEVEL_LOW>; pinctrl-names = "default"; pinctrl-0 = <&max77686_irq>; wakeup-source;