ARM: dts: imx7d-remarkable2: Enable the rohm,bd71815

Add support for the rohm,bd71815 power controller controller for the
reMarkable 2.
Signed-off-by: Alistair Francis <alistair@alistair23.me>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d-remarkable2.dts

@@ -91,6 +91,10 @@ wifi_pwrseq: wifi_pwrseq {
 	};
 };
 
+&cpu0 {
+	cpu-supply = <&buck1>;
+};
+
 &clks {
 	assigned-clocks = <&clks IMX7D_CLKO2_ROOT_SRC>,
 			  <&clks IMX7D_CLKO2_ROOT_DIV>;
@@ -118,6 +122,131 @@ wacom_digitizer: digitizer@9 {
 	};
 };
 
+&i2c2 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c2>;
+	status = "okay";
+
+	bd71815: pmic@4b {
+		compatible = "rohm,bd71815";
+		reg = <0x4b>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_bd71815>;
+		interrupt-parent = <&gpio6>; /* PMIC_INT_B GPIO6_IO16 */
+		interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+		gpio-controller;
+		clocks = <&clks IMX7D_CLKO2_ROOT_SRC>;
+		clock-output-names = "bd71815-32k-out";
+		#clock-cells = <0>;
+		#gpio-cells = <2>;
+
+		regulators {
+			buck1: buck1 {
+				regulator-name = "buck1";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <2000000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <1250>;
+			};
+
+			buck2: buck2 {
+				regulator-name = "buck2";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <2000000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <1250>;
+			};
+
+			buck3: buck3 {
+				regulator-name = "buck3";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <2700000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck4: buck4 {
+				regulator-name = "buck4";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1850000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck5: buck5 {
+				regulator-name = "buck5";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo1: ldo1 {
+				regulator-name = "ldo1";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo2: ldo2 {
+				regulator-name = "ldo2";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo3: ldo3 {
+				regulator-name = "ldo3";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo4: ldo4 {
+				regulator-name = "ldo4";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo5: ldo5 {
+				regulator-name = "ldo5";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo6: ldodvref {
+				regulator-name = "ldodvref";
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo7: ldolpsr {
+				regulator-name = "ldolpsr";
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			boost: wled {
+				regulator-name = "wled";
+				regulator-min-microamp = <10>;
+				regulator-max-microamp = <25000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+		};
+	};
+};
+
 &i2c3 {
 	clock-frequency = <100000>;
 	pinctrl-names = "default";
@@ -292,6 +421,12 @@ MX7D_PAD_LPSR_GPIO1_IO01__GPIO1_IO1	0x00000034 /* WACOM INT */
 };
 
 &iomuxc {
+	pinctrl_bd71815: bd71815grp {
+		fsl,pins = <
+			MX7D_PAD_SAI1_RX_SYNC__GPIO6_IO16	0x59
+		>;
+	};
+
 	pinctrl_brcm_reg: brcmreggrp {
 		fsl,pins = <
 			/* WIFI_PWR_EN */
@@ -322,6 +457,13 @@ MX7D_PAD_I2C1_SCL__I2C1_SCL		0x4000007f
 		>;
 	};
 
+	pinctrl_i2c2: i2c2grp {
+		fsl,pins = <
+			MX7D_PAD_I2C2_SDA__I2C2_SDA		0x4000007f
+			MX7D_PAD_I2C2_SCL__I2C2_SCL		0x4000007f
+		>;
+	};
+
 	pinctrl_i2c3: i2c3grp {
 		fsl,pins = <
 			MX7D_PAD_I2C3_SDA__I2C3_SDA		0x4000007f