arm64: dts: qcom: msm8916-samsung-a2015: Add rt5033 battery

The Samsung Galaxy A3/A5 use a Richtek RT5033 PMIC as battery
fuel gauge, charger, flash LED and for some regulators. For now,
only add the fuel gauge/battery device to the device tree,
so we can check the remaining battery percentage.

The other RT5033 drivers need some more work first before
they can be used properly.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210604172742.10593-4-stephan@gerhold.netSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

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

@@ -151,6 +151,20 @@ magnetometer@12 {
 	};
 };
 
+&blsp_i2c4 {
+	status = "okay";
+
+	battery@35 {
+		compatible = "richtek,rt5033-battery";
+		reg = <0x35>;
+		interrupt-parent = <&msmgpio>;
+		interrupts = <121 IRQ_TYPE_EDGE_BOTH>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&fg_alert_default>;
+	};
+};
+
 &blsp1_uart2 {
 	status = "okay";
 };
@@ -313,6 +327,14 @@ accel_int_default: accel-int-default {
 		bias-disable;
 	};
 
+	fg_alert_default: fg-alert-default {
+		pins = "gpio121";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	gpio_keys_default: gpio-keys-default {
 		pins = "gpio107", "gpio109";
 		function = "gpio";