arm64: dts: ti: k3-am62a7-sk: Add support for TPS6593 PMIC

This patch adds support for TPS6593 PMIC on main I2C0 bus.
This device provides regulators (bucks and LDOs), but also
GPIOs, a RTC, a watchdog, an ESM (Error Signal Monitor)
which monitors the SoC error output signal, and a PFSM
(Pre-configurable Finite State Machine) which manages the
operational modes of the PMIC.
Signed-off-by: Julien Panis <jpanis@baylibre.com>
Signed-off-by: Esteban Blanc <eblanc@baylibre.com>
Signed-off-by: Jai Luthra <j-luthra@ti.com>
Link: https://lore.kernel.org/r/20231003-mcasp_am62a-v3-4-2b631ff319ca@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am62a7-sk.dts

@@ -232,6 +232,20 @@ AM62AX_IOPAD(0x12c, PIN_INPUT, 0) /* (W16) RGMII1_TX_CTL */
 	};
 };
 
+&mcu_pmx0 {
+	status = "okay";
+
+	pmic_irq_pins_default: pmic-irq-default-pins {
+		pinctrl-single,pins = <
+			AM62AX_MCU_IOPAD(0x000, PIN_INPUT, 7) /* (E11) MCU_GPIO0_0 */
+		>;
+	};
+};
+
+&mcu_gpio0 {
+	status = "okay";
+};
+
 &main_i2c0 {
 	status = "okay";
 	pinctrl-names = "default";
@@ -255,6 +269,87 @@ usb_con_hs: endpoint {
 			};
 		};
 	};
+
+	tps659312: pmic@48 {
+		compatible = "ti,tps6593-q1";
+		reg = <0x48>;
+		ti,primary-pmic;
+		system-power-controller;
+
+		gpio-controller;
+		#gpio-cells = <2>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&pmic_irq_pins_default>;
+		interrupt-parent = <&mcu_gpio0>;
+		interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
+
+		buck123-supply = <&vcc_3v3_sys>;
+		buck4-supply = <&vcc_3v3_sys>;
+		buck5-supply = <&vcc_3v3_sys>;
+		ldo1-supply = <&vcc_3v3_sys>;
+		ldo2-supply = <&vcc_3v3_sys>;
+		ldo3-supply = <&buck5>;
+		ldo4-supply = <&vcc_3v3_sys>;
+
+		regulators {
+			buck123: buck123 {
+				regulator-name = "vcc_core";
+				regulator-min-microvolt = <715000>;
+				regulator-max-microvolt = <895000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck4: buck4 {
+				regulator-name = "vcc_1v1";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck5: buck5 {
+				regulator-name = "vcc_1v8_sys";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo1: ldo1 {
+				regulator-name = "vddshv5_sdio";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo2: ldo2 {
+				regulator-name = "vpp_1v8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo3: ldo3 {
+				regulator-name = "vcc_0v85";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <850000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo4: ldo4 {
+				regulator-name = "vdda_1v8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+		};
+	};
 };
 
 &main_i2c1 {