arm64: dts: renesas: eagle: add I2C0 support

Define the Eagle board dependent part of the I2C0 device node.

The I2C0 bus is populated by ON Semiconductor PCA9653 I/O expander and
Analog Devices ADV7511W HDMI transmitter (but we're only describing the
former chip now).

Based on the original (and large) patch by Vladimir Barinov.

Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
index fd3448d..3c5f598 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
@@ -55,7 +55,27 @@
        clock-frequency = <32768>;
 };
 
+&i2c0 {
+       pinctrl-0 = <&i2c0_pins>;
+       pinctrl-names = "default";
+
+       status = "okay";
+       clock-frequency = <400000>;
+
+       io_expander: gpio@20 {
+               compatible = "onnn,pca9654";
+               reg = <0x20>;
+               gpio-controller;
+               #gpio-cells = <2>;
+       };
+};
+
 &pfc {
+       i2c0_pins: i2c0 {
+               groups = "i2c0";
+               function = "i2c0";
+       };
+
        scif0_pins: scif0 {
                groups = "scif0_data";
                function = "scif0";