ARM: dts: exynos: correct MUIC interrupt trigger level on Midas family

The Maxim MUIC 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: 7eec1266751b ("ARM: dts: Add Maxim 77693 PMIC to exynos4412-trats2")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201210212534.216197-4-krzk@kernel.org

diff --git a/arch/arm/boot/dts/exynos4412-midas.dtsi b/arch/arm/boot/dts/exynos4412-midas.dtsi
index b8b75dc81aa15c64807421d6ebaddb17c2fcdc22..d75f554efde05f21c8ef056511f5124c4e9a6a46 100644 (file)
--- a/arch/arm/boot/dts/exynos4412-midas.dtsi
+++ b/arch/arm/boot/dts/exynos4412-midas.dtsi
@@ -173,7 +173,7 @@
                pmic@66 {
                        compatible = "maxim,max77693";
                        interrupt-parent = <&gpx1>;
-                       interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
+                       interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
                        pinctrl-names = "default";
                        pinctrl-0 = <&max77693_irq>;
                        reg = <0x66>;