Old firmware set the GPIO to output, so no interrupts could be read.
Newer firmware does this correctly. The exact version could not be
determined, sadly.
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/renesas/ulcb-kf.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
index 84b0976503b7..45e55ce760d1 100644
--- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
@@ -324,6 +324,7 @@ gpio_exp_77: gpio@77 {
reg = <0x77>;
gpio-controller;
#gpio-cells = <2>;
+ /* If these interrupts don't work, please update your firmware */
interrupt-controller;
interrupt-parent = <&gpio5>;
interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
--
2.39.2
