arm64: dts: qcom: qrb4210-rb2: Describe fixed regulators

The board hosts a whole lot of fixed regulators. Describe them.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-and-Tested-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230515-topic-rb2-bits-v1-1-a52d154a639d@linaro.org

arch/arm64/boot/dts/qcom/qrb4210-rb2.dts

@@ -19,11 +19,86 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
-	vph_pwr: vph-pwr-regulator {
+	vreg_hdmi_out_1p2: regulator-hdmi-out-1p2 {
+		compatible = "regulator-fixed";
+		regulator-name = "VREG_HDMI_OUT_1P2";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		vin-supply = <&vdc_1v2>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	lt9611_3v3: regulator-lt9611-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "LT9611_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vdc_3v3>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	/* Main barrel jack input */
+	vdc_12v: regulator-vdc-12v {
+		compatible = "regulator-fixed";
+		regulator-name = "DC_12V";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	/* 1.2V supply stepped down from the barrel jack input */
+	vdc_1v2: regulator-vdc-1v2 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDC_1V2";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		vin-supply = <&vdc_12v>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	/* 3.3V supply stepped down from the barrel jack input */
+	vdc_3v3: regulator-vdc-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDC_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vdc_12v>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	/* 5V supply stepped down from the barrel jack input */
+	vdc_5v: regulator-vdc-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "VDC_5V";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	/* "Battery" voltage for the SoM, stepped down from the barrel jack input */
+	vdc_vbat_som: regulator-vdc-vbat {
+		compatible = "regulator-fixed";
+		regulator-name = "VBAT_SOM";
+		regulator-min-microvolt = <4200000>;
+		regulator-max-microvolt = <4200000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	/* PMI632 charger out, supplied by VBAT */
+	vph_pwr: regulator-vph-pwr {
 		compatible = "regulator-fixed";
 		regulator-name = "vph_pwr";
 		regulator-min-microvolt = <3700000>;
 		regulator-max-microvolt = <3700000>;
+		vin-supply = <&vdc_vbat_som>;
 
 		regulator-always-on;
 		regulator-boot-on;