ARM: dts: imx6qdl-gw: add Gateworks System Controller support

Add Gateworks System Controller support to Gateworks Ventana boards:
- add dt bindings for GSC mfd driver and hwmon driver for ADC's and
  fan controllers.
- add dt bindings for gpio-keys driver for push-button and interrupt events

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

1 files changed, 158 insertions, 7 deletions

diff --git a/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
index 545b7831692d..a28e79463d0c 100644
--- a/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/linux-event-codes.h>
 
 / {
 	/* these are used by bootloader for disabling nodes */
@@ -28,6 +29,53 @@
 		default-brightness-level = <7>;
 	};
 
+	gpio-keys {
+		compatible = "gpio-keys";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		user-pb {
+			label = "user_pb";
+			gpios = <&gsc_gpio 0 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_0>;
+		};
+
+		user-pb1x {
+			label = "user_pb1x";
+			linux,code = <BTN_1>;
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key-erased {
+			label = "key-erased";
+			linux,code = <BTN_2>;
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom-wp {
+			label = "eeprom_wp";
+			linux,code = <BTN_3>;
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <BTN_4>;
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch-hold {
+			label = "switch_hold";
+			linux,code = <BTN_5>;
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -158,6 +206,115 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
+	gsc: gsc@20 {
+		compatible = "gw,gsc";
+		reg = <0x20>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <4 GPIO_ACTIVE_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		#size-cells = <0>;
+
+		adc {
+			compatible = "gw,gsc-adc";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			channel@0 {
+				gw,mode = <0>;
+				reg = <0x00>;
+				label = "temp";
+			};
+
+			channel@2 {
+				gw,mode = <1>;
+				reg = <0x02>;
+				label = "vdd_vin";
+			};
+
+			channel@5 {
+				gw,mode = <1>;
+				reg = <0x05>;
+				label = "vdd_3p3";
+			};
+
+			channel@8 {
+				gw,mode = <1>;
+				reg = <0x08>;
+				label = "vdd_bat";
+			};
+
+			channel@b {
+				gw,mode = <1>;
+				reg = <0x0b>;
+				label = "vdd_5p0";
+			};
+
+			channel@e {
+				gw,mode = <1>;
+				reg = <0xe>;
+				label = "vdd_arm";
+			};
+
+			channel@11 {
+				gw,mode = <1>;
+				reg = <0x11>;
+				label = "vdd_soc";
+			};
+
+			channel@14 {
+				gw,mode = <1>;
+				reg = <0x14>;
+				label = "vdd_3p0";
+			};
+
+			channel@17 {
+				gw,mode = <1>;
+				reg = <0x17>;
+				label = "vdd_1p5";
+			};
+
+			channel@1d {
+				gw,mode = <1>;
+				reg = <0x1d>;
+				label = "vdd_1p8";
+			};
+
+			channel@20 {
+				gw,mode = <1>;
+				reg = <0x20>;
+				label = "vdd_1p0";
+			};
+
+			channel@23 {
+				gw,mode = <1>;
+				reg = <0x23>;
+				label = "vdd_2p5";
+			};
+
+			channel@26 {
+				gw,mode = <1>;
+				reg = <0x26>;
+				label = "vdd_gps";
+			};
+
+			channel@29 {
+				gw,mode = <1>;
+				reg = <0x29>;
+				label = "vdd_an1";
+			};
+		};
+	};
+
+	gsc_gpio: gpio@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -182,13 +339,6 @@
 		pagesize = <16>;
 	};
 
-	gpio: pca9555@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	rtc: ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -487,6 +637,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};