arm64: dts: qcom: msm8916-samsung-a2015: Add accelerometer/magnetometer

A3U/A5U both use a Bosch BMC150 accelerometer/magnetometer combo.
The chip provides two separate I2C devices for the accelerometer
and magnetometer that are already supported by the bmc150-accel
and bmc150-magn driver.

The only difference between A3U/A5U is the way the sensor is
mounted on the mainboard - set the mount-matrix in the
device-specific device tree part to handle that difference.
Co-developed-by: Michael Srba <michael.srba@seznam.cz>
Signed-off-by: Michael Srba <michael.srba@seznam.cz>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20200622151751.408995-5-stephan@gerhold.netSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi

@@ -167,6 +167,25 @@ muic: sm5502@25 {
 	};
 };
 
+&blsp_i2c2 {
+	status = "okay";
+
+	accelerometer: accelerometer@10 {
+		compatible = "bosch,bmc150_accel";
+		reg = <0x10>;
+		interrupt-parent = <&msmgpio>;
+		interrupts = <115 IRQ_TYPE_EDGE_RISING>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&accel_int_default>;
+	};
+
+	magnetometer@12 {
+		compatible = "bosch,bmc150_magn";
+		reg = <0x12>;
+	};
+};
+
 &spmi_bus {
 	pm8916@0 {
 		pon@800 {
@@ -294,6 +313,14 @@ l18 {
 };
 
 &msmgpio {
+	accel_int_default: accel-int-default {
+		pins = "gpio115";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	gpio_keys_default: gpio-keys-default {
 		pins = "gpio107", "gpio109";
 		function = "gpio";

arch/arm64/boot/dts/qcom/msm8916-samsung-a3u-eur.dts

@@ -22,6 +22,12 @@ reg_panel_vdd3: regulator-panel-vdd3 {
 	};
 };
 
+&accelerometer {
+	mount-matrix = "0", "1", "0",
+		       "1", "0", "0",
+		       "0", "0", "1";
+};
+
 &dsi0 {
 	panel@0 {
 		reg = <0>;

arch/arm64/boot/dts/qcom/msm8916-samsung-a5u-eur.dts

@@ -9,6 +9,12 @@ / {
 	compatible = "samsung,a5u-eur", "qcom,msm8916";
 };
 
+&accelerometer {
+	mount-matrix = "-1", "0", "0",
+			"0", "1", "0",
+			"0", "0", "1";
+};
+
 &blsp_i2c5 {
 	status = "okay";