arm64: ti: dts: Add support for AM62x LP SK

The AM62x LP SK board is similar to the AM62x SK board, but has some
not-so-minor changes that requires different device tree.

The differences are mainly:
- AM62x SoC in the AMC package that meets AECQ100 automotive standard.
- LPDDR4 versus DDR4 on the AM62x SK.
- TPS65219 PMIC instead of discrete regulators.
- IO expander pin names are wired differently.
- Second ethernet port is currently disabled as the boards do not have
  the part physically installed.
- OSPI NAND vs OSPI NOR.
- No WLAN chip instead a SDIO M.2 connector.

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
[vigneshr@ti.com: Add PMIC node]
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20230321-am62-lp-sk-v2-3-0a56e1694804@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>

Author: Anand Gadiyar

arch/arm64/boot/dts/ti/Makefile

@@ -11,6 +11,7 @@
 # Boards with AM62x SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk.dtb
 
 # Boards with AM62Ax SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb

arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts

@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AM62x LP SK: https://www.ti.com/tool/SK-AM62-LP
+ *
+ * Copyright (C) 2021-2023 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+
+#include "k3-am62x-sk-common.dtsi"
+
+/ {
+	compatible = "ti,am62-lp-sk", "ti,am625";
+	model = "Texas Instruments AM62x LP SK";
+
+	vmain_pd: regulator-0 {
+		/* TPS65988 PD CONTROLLER OUTPUT */
+		compatible = "regulator-fixed";
+		regulator-name = "vmain_pd";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vcc_5v0: regulator-1 {
+		/* Output of TPS630702RNMR */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_5v0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vmain_pd>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vcc_3v3_sys: regulator-2 {
+		/* output of LM61460-Q1 */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_3v3_sys";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vmain_pd>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vdd_mmc1: regulator-3 {
+		/* TPS22918DBVR */
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_mmc1";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		enable-active-high;
+		vin-supply = <&vcc_3v3_sys>;
+		gpio = <&exp1 3 GPIO_ACTIVE_HIGH>;
+	};
+
+	vddshv_sdio: regulator-4 {
+		compatible = "regulator-gpio";
+		regulator-name = "vddshv_sdio";
+		pinctrl-names = "default";
+		pinctrl-0 = <&vddshv_sdio_pins_default>;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		vin-supply = <&ldo1_reg>;
+		gpios = <&main_gpio0 31 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x0>,
+			 <3300000 0x1>;
+	};
+};
+
+&main_pmx0 {
+	vddshv_sdio_pins_default: vddshv-sdio-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x07c, PIN_OUTPUT, 7) /* (M19) GPMC0_CLK.GPIO0_31 */
+		>;
+	};
+
+	main_gpio1_ioexp_intr_pins_default: main-gpio1-ioexp-intr-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01d4, PIN_INPUT, 7) /* (C13) UART0_RTSn.GPIO1_23 */
+		>;
+	};
+
+	pmic_irq_pins_default: pmic-irq-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x01f4, PIN_INPUT, 0) /* (B16) EXTINTn */
+		>;
+	};
+};
+
+&main_i2c1 {
+	exp1: gpio@22 {
+		compatible = "ti,tca6424";
+		reg = <0x22>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "GPIO_CPSW2_RST", "GPIO_CPSW1_RST",
+				   "PRU_DETECT", "MMC1_SD_EN",
+				   "VPP_LDO_EN", "EXP_PS_3V3_En",
+				   "EXP_PS_5V0_En", "EXP_HAT_DETECT",
+				   "GPIO_AUD_RSTn", "GPIO_eMMC_RSTn",
+				   "UART1_FET_BUF_EN", "BT_UART_WAKE_SOC",
+				   "GPIO_HDMI_RSTn", "CSI_GPIO0",
+				   "CSI_GPIO1", "GPIO_OLDI_INT",
+				   "HDMI_INTn", "TEST_GPIO2",
+				   "MCASP1_FET_EN", "MCASP1_BUF_BT_EN",
+				   "MCASP1_FET_SEL", "UART1_FET_SEL",
+				   "", "IO_EXP_TEST_LED";
+
+		interrupt-parent = <&main_gpio1>;
+		interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
+	};
+
+	exp2: gpio@23 {
+		compatible = "ti,tca6424";
+		reg = <0x23>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "", "",
+				   "", "",
+				   "", "",
+				   "", "",
+				   "WL_LT_EN", "CSI_RSTz",
+				   "", "",
+				   "", "",
+				   "", "",
+				   "SPI0_FET_SEL", "SPI0_FET_OE",
+				   "GPIO_OLDI_RSTn", "PRU_3V3_EN",
+				   "", "",
+				   "CSI_VLDO_SEL", "SOC_WLAN_SDIO_RST";
+	};
+};
+
+&sdhci1 {
+	vmmc-supply = <&vdd_mmc1>;
+	vqmmc-supply = <&vddshv_sdio>;
+};
+
+&cpsw_port2 {
+	status = "disabled";
+};
+
+&main_i2c0 {
+	tps65219: pmic@30 {
+		compatible = "ti,tps65219";
+		reg = <0x30>;
+		buck1-supply = <&vcc_3v3_sys>;
+		buck2-supply = <&vcc_3v3_sys>;
+		buck3-supply = <&vcc_3v3_sys>;
+		ldo1-supply = <&vcc_3v3_sys>;
+		ldo2-supply = <&buck2_reg>;
+		ldo3-supply = <&vcc_3v3_sys>;
+		ldo4-supply = <&vcc_3v3_sys>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&pmic_irq_pins_default>;
+
+		interrupt-parent = <&gic500>;
+		interrupts = <GIC_SPI 224 IRQ_TYPE_LEVEL_HIGH>;
+		ti,power-button;
+
+		regulators {
+			buck1_reg: buck1 {
+				regulator-name = "VDD_CORE";
+				regulator-min-microvolt = <750000>;
+				regulator-max-microvolt = <750000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck2_reg: buck2 {
+				regulator-name = "VCC1V8_SYS";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			buck3_reg: buck3 {
+				regulator-name = "VDD_LPDDR4";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo1_reg: ldo1 {
+				regulator-name = "VDDSHV_SDIO";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+			};
+
+			ldo2_reg: ldo2 {
+				regulator-name = "VDDAR_CORE";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <850000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo3_reg: ldo3 {
+				regulator-name = "VDDA_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			ldo4_reg: ldo4 {
+				regulator-name = "VDD_1V2";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+		};
+	};
+};