arm64: dts: renesas: white-hawk-cpu: Add PCA9654 I/O Expander

Describe the PCA9654 I/O Expander on the White Hawk CPU board.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/e75ea6feaedc013c504a032a6cf1cb7dd809ce27.1664369170.git.geert+renesas@glider.be

diff --git a/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi b/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi
index 895f0bd..f424b82 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi
@@ -135,6 +135,17 @@
        status = "okay";
        clock-frequency = <400000>;
 
+       io_expander_a: gpio@20 {
+               compatible = "onnn,pca9654";
+               reg = <0x20>;
+               interrupt-parent = <&gpio0>;
+               interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+               gpio-controller;
+               #gpio-cells = <2>;
+               interrupt-controller;
+               #interrupt-cells = <2>;
+       };
+
        eeprom@50 {
                compatible = "rohm,br24g01", "atmel,24c01";
                label = "cpu-board";