linux-kernel - [PATCH 3/5] ARM: dts: imx6sx-sabreauto: add IO expander max7310 support

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Date:   Mon, 23 Apr 2018 11:46:57 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     shawnguo@...nel.org, kernel@...gutronix.de, fabio.estevam@....com,
        robh+dt@...nel.org, mark.rutland@....com
Cc:     Linux-imx@....com, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] 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@....com>
---
 arch/arm/boot/dts/imx6sx-sabreauto.dts | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/boot/dts/imx6sx-sabreauto.dts b/arch/arm/boot/dts/imx6sx-sabreauto.dts
index d59084f..812f40b 100644
--- a/arch/arm/boot/dts/imx6sx-sabreauto.dts
+++ b/arch/arm/boot/dts/imx6sx-sabreauto.dts
@@ -82,6 +82,13 @@
 			>;
 		};
 
+		pinctrl_i2c3_2: i2c3grp-2 {
+			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
@@ -272,3 +279,24 @@
 		};
 	};
 };
+
+&i2c3 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c3_2>;
+	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>;
+	};
+};
-- 
2.7.4