ARM: dts: ux500: samsung-golden: Add IMU (accelerometer + gyroscope)

samsung-golden has a InvenSense MPU-6051M IMU that provides an
accelerometer and gyroscope. It seems to be functionally compatible
with MPU-6050 so we can easily enable it by adding the necessary
device tree nodes.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20191219202052.19039-6-stephan@gerhold.netSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/ste-ux500-samsung-golden.dts

@@ -6,6 +6,7 @@
 #include "ste-dbx5x0-pinctrl.dtsi"
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
 
 /*
  * Note: This device tree cannot be booted directly with the Samsung bootloader.
@@ -114,6 +115,33 @@ uart@80007000 {
 			pinctrl-1 = <&u2rxtx_c_1_sleep>;
 		};
 
+		i2c@80128000 {
+			status = "okay";
+
+			pinctrl-names = "default", "sleep";
+			pinctrl-0 = <&i2c2_b_2_default>;
+			pinctrl-1 = <&i2c2_b_2_sleep>;
+
+			imu@68 {
+				compatible = "invensense,mpu6050";
+				reg = <0x68>;
+
+				/* GPIO206 (ACC_INT) */
+				interrupt-parent = <&gpio6>;
+				interrupts = <14 IRQ_TYPE_EDGE_RISING>;
+
+				mount-matrix = "0", "1", "0",
+					      "-1", "0", "0",
+					       "0", "0", "1";
+
+				vdd-supply = <&ab8500_ldo_aux1_reg>;
+				vddio-supply = <&ab8500_ldo_aux8_reg>;
+
+				pinctrl-names = "default";
+				pinctrl-0 = <&imu_default>;
+			};
+		};
+
 		prcmu@80157000 {
 			ab8505 {
 				ab8500_usb {
@@ -272,6 +300,15 @@ golden_cfg1 {
 		};
 	};
 
+	imu {
+		imu_default: imu_default {
+			golden_cfg1 {
+				pins = "GPIO206_AG24";	/* ACC_INT */
+				ste,config = <&gpio_in_pd>;
+			};
+		};
+	};
+
 	vibrator {
 		vibrator_default: vibrator_default {
 			golden_cfg1 {