arm64: dts: qcom: msm8916-wingtech-wt88047: Add IMU

The Xiaomi Redmi 2 has an InvenSense MPU-6880 supported by the
inv_mpu6050 driver in Linux. Add it to the device tree.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210712133735.318250-4-stephan@gerhold.netSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt88047.dts

@@ -43,6 +43,28 @@ usb_id: usb-id {
 	};
 };
 
+&blsp_i2c2 {
+	status = "okay";
+
+	imu@68 {
+		compatible = "invensense,mpu6880";
+		reg = <0x68>;
+
+		interrupt-parent = <&msmgpio>;
+		interrupts = <115 IRQ_TYPE_EDGE_RISING>;
+
+		vdd-supply = <&pm8916_l17>;
+		vddio-supply = <&pm8916_l6>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&imu_default>;
+
+		mount-matrix = "1",  "0", "0",
+			       "0", "-1", "0",
+			       "0",  "0", "1";
+	};
+};
+
 &blsp_i2c5 {
 	status = "okay";
 
@@ -257,6 +279,14 @@ gpio_keys_default: gpio-keys-default {
 		bias-pull-up;
 	};
 
+	imu_default: imu-default {
+		pins = "gpio115";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	touchscreen_default: touchscreen-default {
 		pins = "gpio13";
 		function = "gpio";