[PATCH] ARM: dts: imx: imx6qdl-gw: add Gateworks System Controller

* [PATCH] ARM: dts: imx: imx6qdl-gw: add Gateworks System Controller
@ 2020-05-20 14:37 ` Tim Harvey
  0 siblings, 0 replies; 17+ messages in thread
From: Tim Harvey @ 2020-05-20 14:37 UTC (permalink / raw)
  To: Shawn Guo, Sascha Hauer, Pengutronix Kernel Team, Fabio Estevam,
	devicetree, Rob Herring
  Cc: linux-arm-kernel, linux-kernel, Tim Harvey

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
  from the GSC.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---
 arch/arm/boot/dts/imx6qdl-gw51xx.dtsi | 152 +++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw52xx.dtsi | 158 ++++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw53xx.dtsi | 164 +++++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw54xx.dtsi | 166 ++++++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw551x.dtsi | 146 ++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw552x.dtsi | 152 +++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw553x.dtsi | 140 +++++++++++++++++++++++++++-
 arch/arm/boot/dts/imx6qdl-gw560x.dtsi | 164 +++++++++++++++++++++++++++++++--
 arch/arm/boot/dts/imx6qdl-gw5903.dtsi | 139 +++++++++++++++++++++++++++-
 arch/arm/boot/dts/imx6qdl-gw5904.dtsi | 140 +++++++++++++++++++++++++++-
 arch/arm/boot/dts/imx6qdl-gw5907.dtsi | 141 ++++++++++++++++++++++++++++-
 arch/arm/boot/dts/imx6qdl-gw5910.dtsi | 159 +++++++++++++++++++++++++++++++-
 arch/arm/boot/dts/imx6qdl-gw5912.dtsi | 146 +++++++++++++++++++++++++++++-
 arch/arm/boot/dts/imx6qdl-gw5913.dtsi | 152 ++++++++++++++++++++++++++++++-
 14 files changed, 2062 insertions(+), 57 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi
index 419a7cd..5fbf7d1 100644
--- a/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi
@@ -19,6 +19,53 @@
 		bootargs = "console=ttymxc1,115200";
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -102,6 +149,103 @@
 	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_an1";
+			};
+
+			channel@23 {
+				gw,mode = <1>;
+				reg = <0x23>;
+				label = "vdd_2p5";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -126,13 +270,6 @@
 		pagesize = <16>;
 	};
 
-	gpio: pca9555@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	rtc: ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -387,6 +524,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0x0001b0b0 /* GSC_IRQ# */
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi
index 60563ff..9f7436d 100644
--- a/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw52xx.dtsi
@@ -28,6 +28,53 @@
 		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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -165,6 +212,109 @@
 	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@29 {
+				gw,mode = <1>;
+				reg = <0x29>;
+				label = "vdd_an1";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -189,13 +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>;
@@ -504,6 +647,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
index 8942bec..2a5f484 100644
--- a/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw53xx.dtsi
@@ -28,6 +28,53 @@
 		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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -158,6 +205,115 @@
 	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: pca9555@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 +338,6 @@
 		pagesize = <16>;
 	};
 
-	gpio: pca9555@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	rtc: ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -486,6 +635,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
index c40583d..d25d73d 100644
--- a/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
@@ -29,6 +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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -195,6 +242,117 @@
 	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>;
+		#address-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";
+			};
+		};
+
+		fan-controller@2c {
+			compatible = "gw,gsc-fan";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x2c>;
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -219,13 +377,6 @@
 		pagesize = <16>;
 	};
 
-	gpio: pca9555@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	rtc: ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -571,6 +722,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw551x.dtsi b/arch/arm/boot/dts/imx6qdl-gw551x.dtsi
index c38e86e..90c6d0d 100644
--- a/arch/arm/boot/dts/imx6qdl-gw551x.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw551x.dtsi
@@ -63,6 +63,53 @@
 		bootargs = "console=ttymxc1,115200";
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -167,6 +214,97 @@
 	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_1p8a";
+			};
+
+			channel@20 {
+				gw,mode = <1>;
+				reg = <0x20>;
+				label = "vdd_1p0b";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -191,13 +329,6 @@
 		pagesize = <16>;
 	};
 
-	gpio: pca9555@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	rtc: ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -464,6 +595,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw552x.dtsi b/arch/arm/boot/dts/imx6qdl-gw552x.dtsi
index bb35971..0d563be 100644
--- a/arch/arm/boot/dts/imx6qdl-gw552x.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw552x.dtsi
@@ -20,6 +20,53 @@
 		bootargs = "console=ttymxc1,115200";
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -92,6 +139,103 @@
 	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";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -116,13 +260,6 @@
 		pagesize = <16>;
 	};
 
-	gpio: pca9555@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	rtc: ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -305,6 +442,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw553x.dtsi b/arch/arm/boot/dts/imx6qdl-gw553x.dtsi
index ee85031..7f67180 100644
--- a/arch/arm/boot/dts/imx6qdl-gw553x.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw553x.dtsi
@@ -61,6 +61,53 @@
 		stdout-path = &uart2;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -130,11 +177,101 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	gpio: pca9555@23 {
+	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_1p8a";
+			};
+
+			channel@20 {
+				gw,mode = <1>;
+				reg = <0x20>;
+				label = "vdd_1p0b";
+			};
+
+			channel@26 {
+				gw,mode = <1>;
+				reg = <0x26>;
+				label = "vdd_an1";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom1: eeprom@50 {
@@ -428,6 +565,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw560x.dtsi b/arch/arm/boot/dts/imx6qdl-gw560x.dtsi
index 69ca70d..cb20301 100644
--- a/arch/arm/boot/dts/imx6qdl-gw560x.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw560x.dtsi
@@ -88,6 +88,53 @@
 		default-on;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -243,6 +290,115 @@
 	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_an1";
+			};
+
+			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_an2";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
+		compatible = "nxp,pca9555";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
+	};
+
 	eeprom1: eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
@@ -267,13 +423,6 @@
 		pagesize = <16>;
 	};
 
-	pca9555: gpio@23 {
-		compatible = "nxp,pca9555";
-		reg = <0x23>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	ds1672: rtc@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
@@ -608,6 +757,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0xb0b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw5903.dtsi b/arch/arm/boot/dts/imx6qdl-gw5903.dtsi
index aee9221..e1bf19e 100644
--- a/arch/arm/boot/dts/imx6qdl-gw5903.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw5903.dtsi
@@ -71,6 +71,53 @@
 		default-brightness-level = <100>;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -183,11 +230,101 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	pca9555: gpio@23 {
+	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_an1";
+			};
+
+			channel@23 {
+				gw,mode = <1>;
+				reg = <0x23>;
+				label = "vdd_2p5";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom1: eeprom@50 {
diff --git a/arch/arm/boot/dts/imx6qdl-gw5904.dtsi b/arch/arm/boot/dts/imx6qdl-gw5904.dtsi
index 76d6cf5..1535ef6 100644
--- a/arch/arm/boot/dts/imx6qdl-gw5904.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw5904.dtsi
@@ -68,6 +68,53 @@
 		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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -205,11 +252,101 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	pca9555: gpio@23 {
+	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_an1";
+			};
+
+			channel@23 {
+				gw,mode = <1>;
+				reg = <0x23>;
+				label = "vdd_2p5";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom1: eeprom@50 {
@@ -503,6 +640,7 @@
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
 			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0x0001b0b0 /* GSC_IRQ# */
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-gw5907.dtsi b/arch/arm/boot/dts/imx6qdl-gw5907.dtsi
index 0bdebdd..81853b5 100644
--- a/arch/arm/boot/dts/imx6qdl-gw5907.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw5907.dtsi
@@ -19,6 +19,53 @@
 		stdout-path = &uart2;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -102,11 +149,101 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	gpio@23 {
+	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_an1";
+			};
+
+			channel@23 {
+				gw,mode = <1>;
+				reg = <0x23>;
+				label = "vdd_2p5";
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom@50 {
@@ -133,7 +270,7 @@
 		pagesize = <16>;
 	};
 
-	rtc@68 {
+	ds1672@68 {
 		compatible = "dallas,ds1672";
 		reg = <0x68>;
 	};
diff --git a/arch/arm/boot/dts/imx6qdl-gw5910.dtsi b/arch/arm/boot/dts/imx6qdl-gw5910.dtsi
index 0857de5..2f34623 100644
--- a/arch/arm/boot/dts/imx6qdl-gw5910.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw5910.dtsi
@@ -22,6 +22,53 @@
 		reg = <0x10000000 0x20000000>;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -111,11 +158,121 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	gpio@23 {
+	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@6 {
+				gw,mode = <0>;
+				reg = <0x06>;
+				label = "temp";
+			};
+
+			channel@8 {
+				gw,mode = <1>;
+				reg = <0x08>;
+				label = "vdd_bat";
+			};
+
+			channel@82 {
+				gw,mode = <2>;
+				reg = <0x82>;
+				label = "vdd_vin";
+				gw,voltage-divider-ohms = <22100 1000>;
+				gw,voltage-offset-microvolt = <800000>;
+			};
+
+			channel@84 {
+				gw,mode = <2>;
+				reg = <0x84>;
+				label = "vdd_5p0";
+				gw,voltage-divider-ohms = <22100 10000>;
+			};
+
+			channel@86 {
+				gw,mode = <2>;
+				reg = <0x86>;
+				label = "vdd_3p3";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@88 {
+				gw,mode = <2>;
+				reg = <0x88>;
+				label = "vdd_2p5";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@8c {
+				gw,mode = <2>;
+				reg = <0x8c>;
+				label = "vdd_3p0";
+			};
+
+			channel@8e {
+				gw,mode = <2>;
+				reg = <0x8e>;
+				label = "vdd_arm";
+			};
+
+			channel@90 {
+				gw,mode = <2>;
+				reg = <0x90>;
+				label = "vdd_soc";
+			};
+
+			channel@92 {
+				gw,mode = <2>;
+				reg = <0x92>;
+				label = "vdd_1p5";
+			};
+
+			channel@98 {
+				gw,mode = <2>;
+				reg = <0x98>;
+				label = "vdd_1p8";
+			};
+
+			channel@9a {
+				gw,mode = <2>;
+				reg = <0x9a>;
+				label = "vdd_1p0";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@9c {
+				gw,mode = <2>;
+				reg = <0x9c>;
+				label = "vdd_an1";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@a2 {
+				gw,mode = <2>;
+				reg = <0xa2>;
+				label = "vdd_gsc";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom@50 {
diff --git a/arch/arm/boot/dts/imx6qdl-gw5912.dtsi b/arch/arm/boot/dts/imx6qdl-gw5912.dtsi
index 8c57fd2..0e2dbc8 100644
--- a/arch/arm/boot/dts/imx6qdl-gw5912.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw5912.dtsi
@@ -20,6 +20,53 @@
 		stdout-path = &uart2;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -106,11 +153,108 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	gpio@23 {
+	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";
+			};
+		};
+
+		fan-controller@a {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "gw,gsc-fan";
+			reg = <0x0a>;
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom@50 {
diff --git a/arch/arm/boot/dts/imx6qdl-gw5913.dtsi b/arch/arm/boot/dts/imx6qdl-gw5913.dtsi
index 635c203..5fa79c9 100644
--- a/arch/arm/boot/dts/imx6qdl-gw5913.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw5913.dtsi
@@ -19,6 +19,53 @@
 		stdout-path = &uart2;
 	};
 
+	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 = <256>; /* BTN_0 */
+		};
+
+		user_pb1x {
+			label = "user_pb1x";
+			linux,code = <257>; /* BTN_1 */
+			interrupt-parent = <&gsc>;
+			interrupts = <0>;
+		};
+
+		key_erased {
+			label = "key-erased";
+			linux,code = <258>; /* BTN_2 */
+			interrupt-parent = <&gsc>;
+			interrupts = <1>;
+		};
+
+		eeprom_wp {
+			label = "eeprom_wp";
+			linux,code = <259>; /* BTN_3 */
+			interrupt-parent = <&gsc>;
+			interrupts = <2>;
+		};
+
+		tamper {
+			label = "tamper";
+			linux,code = <260>; /* BTN_4 */
+			interrupt-parent = <&gsc>;
+			interrupts = <5>;
+		};
+
+		switch_hold {
+			label = "switch_hold";
+			linux,code = <261>; /* BTN_5 */
+			interrupt-parent = <&gsc>;
+			interrupts = <7>;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -87,11 +134,114 @@
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
 
-	gpio@23 {
+	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@6 {
+				gw,mode = <0>;
+				reg = <0x06>;
+				label = "temp";
+			};
+
+			channel@8 {
+				gw,mode = <1>;
+				reg = <0x08>;
+				label = "vdd_bat";
+			};
+
+			channel@82 {
+				gw,mode = <2>;
+				reg = <0x82>;
+				label = "vdd_vin";
+				gw,voltage-divider-ohms = <22100 1000>;
+				gw,voltage-offset-microvolt = <800000>;
+			};
+
+			channel@84 {
+				gw,mode = <2>;
+				reg = <0x84>;
+				label = "vdd_5p0";
+				gw,voltage-divider-ohms = <22100 10000>;
+			};
+
+			channel@86 {
+				gw,mode = <2>;
+				reg = <0x86>;
+				label = "vdd_3p3";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@88 {
+				gw,mode = <2>;
+				reg = <0x88>;
+				label = "vdd_2p5";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@8c {
+				gw,mode = <2>;
+				reg = <0x8c>;
+				label = "vdd_arm";
+			};
+
+			channel@8e {
+				gw,mode = <2>;
+				reg = <0x8e>;
+				label = "vdd_soc";
+			};
+
+			channel@90 {
+				gw,mode = <2>;
+				reg = <0x90>;
+				label = "vdd_1p5";
+			};
+
+			channel@92 {
+				gw,mode = <2>;
+				reg = <0x92>;
+				label = "vdd_1p0";
+			};
+
+			channel@98 {
+				gw,mode = <2>;
+				reg = <0x98>;
+				label = "vdd_3p0";
+			};
+
+			channel@9a {
+				gw,mode = <2>;
+				reg = <0x9a>;
+				label = "vdd_an1";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+
+			channel@a2 {
+				gw,mode = <2>;
+				reg = <0xa2>;
+				label = "vdd_gsc";
+				gw,voltage-divider-ohms = <10000 10000>;
+			};
+		};
+	};
+
+	gsc_gpio: pca9555@23 {
 		compatible = "nxp,pca9555";
 		reg = <0x23>;
 		gpio-controller;
 		#gpio-cells = <2>;
+		interrupt-parent = <&gsc>;
+		interrupts = <4>;
 	};
 
 	eeprom@50 {
-- 
2.7.4


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