arm64: dts: renesas: r8a77990: ebisu: Add GPIO expander

Describe the ON Semiconductor PCA9654 I/O expander on the first I2C
bus, which provides 8 extra GPIOs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts b/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts
index 144c082..4d14926 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts
@@ -337,6 +337,15 @@
 &i2c0 {
        status = "okay";
 
+       io_expander: gpio@20 {
+               compatible = "onnn,pca9654";
+               reg = <0x20>;
+               gpio-controller;
+               #gpio-cells = <2>;
+               interrupt-parent = <&gpio2>;
+               interrupts = <22 IRQ_TYPE_LEVEL_LOW>;
+       };
+
        hdmi-encoder@39 {
                compatible = "adi,adv7511w";
                reg = <0x39>;