arm: dts: Add support for AM69 Starter Kit

AM69 Starter Kit is a single board designed for TI AM69 SoC.
TI AM69 SoC belongs to the K3 Multicore SoC architecture platform,
providing advanced system integration in automotive ADAS applications,
autonomous mobile robot and edge AI applications. The SOC comprises
of Cortex-A72s in dual clusters, lockstep capable dual Cortex-R5F MCUs,
Vision Processing Accelerators (VPAC) with Image Signal Processor (ISP)
and multiple vision assist accelerators, Depth and Motion Processing
Accelerators (DMPAC), Deep-learning Matrix Multiply Accelerator(MMA)
and C7x floating point vector DSP

	AM69 SK supports the following interfaces:
	* 32 GB LPDDR4 RAM
	*x1 Gigabit Ethernet interface
	* x1 USB 3.1 Type-C port
	* x2 USB 3.1 Type-A ports
	* x1 PCIe M.2 M Key
	* x1 PCIe M.2 E Key
	* 512 Mbit OSPI flash
	* x2 CSI2 Camera interface
	* 40-pin Raspberry Pi header
	* 50-pin ENET Header

Add initial support for the AM69 SK board.

Design Files: https://www.ti.com/lit/zip/SPRR466
TRM: https://www.ti.com/lit/zip/spruj52

Signed-off-by: Dasnavis Sabiya <sabiya.d@ti.com>

2 files changed, 220 insertions, 2 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 6a863cfab2..cea1e31d5a 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1270,8 +1270,9 @@ dtb-$(CONFIG_SOC_K3_J721S2) += k3-am68-sk-base-board.dtb\
 			       k3-am68-sk-r5-base-board.dtb\
 			       k3-j721s2-common-proc-board.dtb\
 			       k3-j721s2-r5-common-proc-board.dtb
-dtb-$(CONFIG_SOC_K3_J784S4) += k3-j784s4-evm.dtb\
-			       k3-j784s4-r5-evm.dtb
+dtb-$(CONFIG_SOC_K3_J784S4) +=	k3-am69-sk.dtb \
+				k3-j784s4-evm.dtb \
+				k3-j784s4-r5-evm.dtb
 dtb-$(CONFIG_SOC_K3_AM642) += k3-am642-evm.dtb \
 			      k3-am642-r5-evm.dtb \
 			      k3-am642-sk.dtb \
diff --git a/arch/arm/dts/k3-am69-sk.dts b/arch/arm/dts/k3-am69-sk.dts
new file mode 100644
index 0000000000..92c645b611
--- /dev/null
+++ b/arch/arm/dts/k3-am69-sk.dts
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022-2023 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ * Design Files: https://www.ti.com/lit/zip/SPRR466
+ * TRM: https://www.ti.com/lit/zip/spruj52
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/net/ti-dp83867.h>
+#include <dt-bindings/gpio/gpio.h>
+#include "k3-j784s4.dtsi"
+
+/ {
+	compatible = "ti,am69-sk", "ti,j784s4";
+	model = "Texas Instruments AM69 SK";
+
+	chosen {
+		stdout-path = "serial2:115200n8";
+	};
+
+	aliases {
+		serial2 = &main_uart8;
+		mmc1 = &main_sdhci1;
+		i2c0 = &main_i2c0;
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		/* 32G RAM */
+		reg = <0x00 0x80000000 0x00 0x80000000>,
+		      <0x08 0x80000000 0x07 0x80000000>;
+	};
+
+	reserved_memory: reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		secure_ddr: optee@9e800000 {
+			reg = <0x00 0x9e800000 0x00 0x01800000>;
+			no-map;
+		};
+	};
+
+	vusb_main: regulator-vusb-main5v0 {
+		/* USB MAIN INPUT 5V DC */
+		compatible = "regulator-fixed";
+		regulator-name = "vusb-main5v0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vsys_5v0: regulator-vsys5v0 {
+		/* Output of LM61460 */
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_5v0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vusb_main>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vsys_3v3: regulator-vsys3v3 {
+		/* Output of LM5143 */
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vusb_main>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vdd_mmc1: regulator-sd {
+		/* Output of TPS22918 */
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_mmc1";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		enable-active-high;
+		vin-supply = <&vsys_3v3>;
+		gpio = <&exp1 2 GPIO_ACTIVE_HIGH>;
+	};
+
+	vdd_sd_dv: regulator-tlv71033 {
+		/* Output of TLV71033 */
+		compatible = "regulator-gpio";
+		regulator-name = "tlv71033";
+		pinctrl-names = "default";
+		pinctrl-0 = <&vdd_sd_dv_pins_default>;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		vin-supply = <&vsys_5v0>;
+		gpios = <&main_gpio0 49 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x0>,
+			 <3300000 0x1>;
+	};
+};
+
+&wkup_pmx0 {
+
+	mcu_uart0_pins_default: mcu-uart0-pins-default {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x0f4, PIN_INPUT, 0) /* (K38) WKUP_GPIO0_13.MCU_UART0_RXD */
+			J784S4_WKUP_IOPAD(0x0f0, PIN_OUTPUT, 0) /* (J37) WKUP_GPIO0_12.MCU_UART0_TXD */
+		>;
+	};
+
+	wkup_uart0_pins_default: wkup-uart0-pins-default {
+		pinctrl-single,pins = <
+			J784S4_WKUP_IOPAD(0x0d8, PIN_INPUT, 0) /* (E25) WKUP_GPIO0_6.WKUP_UART0_CTSn */
+			J784S4_WKUP_IOPAD(0x0dc, PIN_OUTPUT, 0) /* (F28) WKUP_GPIO0_7.WKUP_UART0_RTSn */
+			J784S4_WKUP_IOPAD(0x0b0, PIN_INPUT, 0) /* (K35) WKUP_UART0_RXD */
+			J784S4_WKUP_IOPAD(0x0b4, PIN_OUTPUT, 0) /* (K34) WKUP_UART0_TXD */
+		>;
+	};
+};
+
+&main_pmx0 {
+	main_uart8_pins_default: main-uart8-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x0d0, PIN_INPUT, 11) /* (AP38) SPI0_CS1.UART8_RXD */
+			J784S4_IOPAD(0x0d4, PIN_OUTPUT, 11) /* (AN38) SPI0_CLK.UART8_TXD */
+		>;
+	};
+
+	main_i2c0_pins_default: main-i2c0-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x0e0, PIN_INPUT_PULLUP, 0) /* (AN36) I2C0_SCL */
+			J784S4_IOPAD(0x0e4, PIN_INPUT_PULLUP, 0) /* (AP37) I2C0_SDA */
+		>;
+	};
+
+	main_mmc1_pins_default: main-mmc1-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x104, PIN_INPUT, 0) /* (AB38) MMC1_CLK */
+			J784S4_IOPAD(0x108, PIN_INPUT, 0) /* (AB36) MMC1_CMD */
+			J784S4_IOPAD(0x100, PIN_INPUT, 0) /* (No Pin) MMC1_CLKLB */
+			J784S4_IOPAD(0x0fc, PIN_INPUT, 0) /* (AA33) MMC1_DAT0 */
+			J784S4_IOPAD(0x0f8, PIN_INPUT, 0) /* (AB34) MMC1_DAT1 */
+			J784S4_IOPAD(0x0f4, PIN_INPUT, 0) /* (AA32) MMC1_DAT2 */
+			J784S4_IOPAD(0x0f0, PIN_INPUT, 0) /* (AC38) MMC1_DAT3 */
+			J784S4_IOPAD(0x0e8, PIN_INPUT, 8) /* (AR38) TIMER_IO0.MMC1_SDCD */
+		>;
+	};
+
+	main_usbss0_pins_default: main-usbss0-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x0ec, PIN_OUTPUT, 6) /* (AN37) TIMER_IO1.USB0_DRVVBUS */
+		>;
+	};
+
+	vdd_sd_dv_pins_default: vdd-sd-dv-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x0C4, PIN_INPUT, 7) /* (AD36) ECAP0_IN_APWM_OUT.GPIO0_49 */
+		>;
+	};
+};
+
+&wkup_uart0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&wkup_uart0_pins_default>;
+};
+
+&mcu_uart0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_uart0_pins_default>;
+};
+
+&main_uart8 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_uart8_pins_default>;
+};
+
+&main_i2c0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c0_pins_default>;
+	clock-frequency = <400000>;
+
+	exp1: gpio@21 {
+		compatible = "ti,tca6416";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names	= "BOARDID_EEPROM_WP", "CAN_STB", "GPIO_uSD_PWR_EN",
+				"IO_EXP_MCU_RGMII_RST#", "IO_EXP_PCIe0_4L_PERST#",
+				"IO_EXP_PCIe1_M.2_RTSz", "IO_EXP_PCIe3_M.2_RTSz",
+				"PM_INA_BUS_EN", "ENET1_EXP_PWRDN", "EXP1_ENET_RSTz",
+				"ENET1_I2CMUX_SEL", "PCIe0_CLKREQ#", "PCIe1_M.2_CLKREQ#",
+				"PCIe3_M2_CLKREQ#", "PCIe0_PRSNT2#_1", "PCIe0_PRSNT2#_2";
+	};
+};
+
+&main_sdhci1 {
+	/* SD card */
+	status = "okay";
+	pinctrl-0 = <&main_mmc1_pins_default>;
+	pinctrl-names = "default";
+	disable-wp;
+	vmmc-supply = <&vdd_mmc1>;
+	vqmmc-supply = <&vdd_sd_dv>;
+};
+
+&main_gpio0 {
+	status = "okay";
+};