arm64: dts: imx8mn-ddr4-evk: Add rohm,bd71847 PMIC support

On i.MX8MN DDR4 EVK board, there is a rohm,bd71847 PMIC
on i2c1 bus, enable it.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts

@@ -57,6 +57,12 @@ MX8MN_IOMUXC_I2C1_SDA_I2C1_SDA		0x400001c3
 		>;
 	};
 
+	pinctrl_pmic: pmicirq {
+		fsl,pins = <
+			MX8MN_IOMUXC_GPIO1_IO03_GPIO1_IO3	0x41
+		>;
+	};
+
 	pinctrl_reg_usdhc2_vmmc: regusdhc2vmmc {
 		fsl,pins = <
 			MX8MN_IOMUXC_SD2_RESET_B_GPIO2_IO19	0x41
@@ -194,6 +200,109 @@ &i2c1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
+
+	pmic@4b {
+		compatible = "rohm,bd71847";
+		reg = <0x4b>;
+		pinctrl-0 = <&pinctrl_pmic>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <3 GPIO_ACTIVE_LOW>;
+		rohm,reset-snvs-powered;
+
+		regulators {
+			buck1_reg: BUCK1 {
+				regulator-name = "BUCK1";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <1250>;
+			};
+
+			buck2_reg: BUCK2 {
+				regulator-name = "BUCK2";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <1250>;
+			};
+
+			buck3_reg: BUCK3 {
+				// BUCK5 in datasheet
+				regulator-name = "BUCK3";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1350000>;
+			};
+
+			buck4_reg: BUCK4 {
+				// BUCK6 in datasheet
+				regulator-name = "BUCK4";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck5_reg: BUCK5 {
+				// BUCK7 in datasheet
+				regulator-name = "BUCK5";
+				regulator-min-microvolt = <1605000>;
+				regulator-max-microvolt = <1995000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck6_reg: BUCK6 {
+				// BUCK8 in datasheet
+				regulator-name = "BUCK6";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1400000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo1_reg: LDO1 {
+				regulator-name = "LDO1";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo2_reg: LDO2 {
+				regulator-name = "LDO2";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <900000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo3_reg: LDO3 {
+				regulator-name = "LDO3";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo4_reg: LDO4 {
+				regulator-name = "LDO4";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo6_reg: LDO6 {
+				regulator-name = "LDO6";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+		};
+	};
 };
 
 &snvs_pwrkey {