ARM: dts: imx6sx-sabreauto: add IO expander max7310 support

i.MX6SX Sabre Auto board has two max7310 IO expander on I2C3 bus, add
support for them.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6sx-sabreauto.dts b/arch/arm/boot/dts/imx6sx-sabreauto.dts
index ae253af..4d41b4d 100644 (file)
--- a/arch/arm/boot/dts/imx6sx-sabreauto.dts
+++ b/arch/arm/boot/dts/imx6sx-sabreauto.dts
@@ -73,6 +73,13 @@
                >;
        };
 
+       pinctrl_i2c3: i2c3grp {
+               fsl,pins = <
+                       MX6SX_PAD_KEY_ROW4__I2C3_SDA            0x4001b8b1
+                       MX6SX_PAD_KEY_COL4__I2C3_SCL            0x4001b8b1
+               >;
+       };
+
        pinctrl_uart1: uart1grp {
                fsl,pins = <
                        MX6SX_PAD_GPIO1_IO04__UART1_TX          0x1b0b1
@@ -262,3 +269,24 @@
                #gpio-cells = <2>;
        };
 };
+
+&i2c3 {
+       clock-frequency = <100000>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_i2c3>;
+       status = "okay";
+
+       max7310_a: gpio@30 {
+               compatible = "maxim,max7310";
+               reg = <0x30>;
+               gpio-controller;
+               #gpio-cells = <2>;
+       };
+
+       max7310_b: gpio@32 {
+               compatible = "maxim,max7310";
+               reg = <0x32>;
+               gpio-controller;
+               #gpio-cells = <2>;
+       };
+};