[PATCH V5 3/3] arm64: dts: ti: k3-am68-sk: Add support for AM68 SK base board

[Sinthu Raja <sinthu.raja@mistralsolutions.com>]

From: Sinthu Raja <sinthu.raja@ti.com>

The SK architecture comprises of baseboard and a SOM board. The
AM68 Starter Kit's baseboard contains most of the actual connectors,
power supply etc. The System on Module (SoM) is plugged on to the base
board. Therefore, add support for peripherals brought out in the base
board.

Schematics: https://www.ti.com/lit/zip/SPRR463

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
---

No changes in V4 & V5

Changes in V3:
=============
*Address review comments:
 - Remove the unused nodes that are disabled by default.
 - Update the gpio regulator node: gpio-regulator-tlv to "regulator-tlv".

Changes in V2:
=============
*Address the review comments:
 - Update the commit description.
 - Update the regulator nodes: fixedregulator to "regulator-"
 - Update the commit $subject to align with rest of the commits.
 - Drop the blank lines
 - Change the node names that are added with underscore("_") with "-"

V1: https://lore.kernel.org/linux-arm-kernel/20221018123849.23695-4-sinthu.raja@ti.com/
V2: https://lore.kernel.org/lkml/20221107123852.8063-4-sinthu.raja@ti.com/
V3: https://lore.kernel.org/lkml/20230110110052.14851-4-sinthu.raja@ti.com/
V4: https://lore.kernel.org/lkml/20230105151740.29436-4-sinthu.raja@ti.com/

 arch/arm64/boot/dts/ti/Makefile               |   2 +
 .../boot/dts/ti/k3-am68-sk-base-board.dts     | 335 ++++++++++++++++++
 2 files changed, 337 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index cf7c509538a4..1b4e8b573de5 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -12,6 +12,8 @@ dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic-pg2.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced-pg2.dtb
 
+dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board.dtb
+
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-beagleboneai64.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-common-proc-board.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-sk.dtb
diff --git a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
new file mode 100644
index 000000000000..2091cd2431fb
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ * Base Board: https://www.ti.com/lit/zip/SPRR463
+ */
+
+/dts-v1/;
+
+#include "k3-am68-sk-som.dtsi"
+#include <dt-bindings/net/ti-dp83867.h>
+#include <dt-bindings/phy/phy-cadence.h>
+#include <dt-bindings/phy/phy.h>
+#include <dt-bindings/mux/ti-serdes.h>
+
+/ {
+	compatible = "ti,am68-sk", "ti,j721s2";
+	model = "Texas Instruments AM68 SK";
+
+	chosen {
+		stdout-path = "serial2:115200n8";
+	};
+
+	aliases {
+		serial2 = &main_uart8;
+		mmc1 = &main_sdhci1;
+		can0 = &mcu_mcan0;
+		can1 = &mcu_mcan1;
+		can2 = &main_mcan6;
+		can3 = &main_mcan7;
+	};
+
+	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_3v3: regulator-vsys3v3 {
+		/* Output of LM5141 */
+		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 10 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_3v3>;
+		gpios = <&main_gpio0 49 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x0>,
+			 <3300000 0x1>;
+	};
+
+	vsys_io_1v8: regulator-vsys-io-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_io_1v8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vsys_io_1v2: regulator-vsys-io-1v2 {
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_io_1v2";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	transceiver1: can-phy0 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+	};
+
+	transceiver2: can-phy1 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+	};
+
+	transceiver3: can-phy2 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+	};
+
+	transceiver4: can-phy3 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+	};
+};
+
+&main_pmx0 {
+	main_uart8_pins_default: main-uart8-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x0d0, PIN_INPUT, 11) /* (AF26) SPI0_CS1.UART8_RXD */
+			J721S2_IOPAD(0x0d4, PIN_OUTPUT, 11) /* (AH27) SPI0_CLK.UART8_TXD */
+		>;
+	};
+
+	main_i2c0_pins_default: main-i2c0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x0e0, PIN_INPUT, 0) /* (AH25) I2C0_SCL */
+			J721S2_IOPAD(0x0e4, PIN_INPUT, 0) /* (AE24) I2C0_SDA */
+		>;
+	};
+
+	main_mmc1_pins_default: main-mmc1-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x104, PIN_INPUT, 0) /* (P23) MMC1_CLK */
+			J721S2_IOPAD(0x108, PIN_INPUT, 0) /* (N24) MMC1_CMD */
+			J721S2_IOPAD(0x0fc, PIN_INPUT, 0) /* (M23) MMC1_DAT0 */
+			J721S2_IOPAD(0x0f8, PIN_INPUT, 0) /* (P24) MMC1_DAT1 */
+			J721S2_IOPAD(0x0f4, PIN_INPUT, 0) /* (R24) MMC1_DAT2 */
+			J721S2_IOPAD(0x0f0, PIN_INPUT, 0) /* (R22) MMC1_DAT3 */
+			J721S2_IOPAD(0x0e8, PIN_INPUT, 8) /* (AE25) TIMER_IO0.MMC1_SDCD */
+		>;
+	};
+
+	vdd_sd_dv_pins_default: vdd-sd-dv-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x0c4, PIN_INPUT, 7) /* (AB26) ECAP0_IN_APWM_OUT.GPIO0_49 */
+		>;
+	};
+
+	main_usbss0_pins_default: main-usbss0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x0ec, PIN_OUTPUT, 6) /* (AG25) TIMER_IO1.USB0_DRVVBUS */
+		>;
+	};
+
+	main_mcan6_pins_default: main-mcan6-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x098, PIN_INPUT, 0) /* (V25) MCASP0_AXR10.MCAN6_RX */
+			J721S2_IOPAD(0x094, PIN_INPUT, 0) /* (AA25) MCASP0_AXR9.MCAN6_TX */
+		>;
+	};
+
+	main_mcan7_pins_default: main-mcan7-pins-default {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x0a0, PIN_INPUT, 0) /* (AB25) MCASP0_AXR12.MCAN7_RX */
+			J721S2_IOPAD(0x09c, PIN_INPUT, 0) /* (T24) MCASP0_AXR11.MCAN7_TX */
+		>;
+	};
+};
+
+&wkup_pmx0 {
+	mcu_cpsw_pins_default: mcu-cpsw-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x094, PIN_INPUT, 0) /* (B22) MCU_RGMII1_RD0 */
+			J721S2_WKUP_IOPAD(0x090, PIN_INPUT, 0) /* (B21) MCU_RGMII1_RD1 */
+			J721S2_WKUP_IOPAD(0x08c, PIN_INPUT, 0) /* (C22) MCU_RGMII1_RD2 */
+			J721S2_WKUP_IOPAD(0x088, PIN_INPUT, 0) /* (D23) MCU_RGMII1_RD3 */
+			J721S2_WKUP_IOPAD(0x084, PIN_INPUT, 0) /* (D22) MCU_RGMII1_RXC */
+			J721S2_WKUP_IOPAD(0x06c, PIN_INPUT, 0) /* (E23) MCU_RGMII1_RX_CTL */
+			J721S2_WKUP_IOPAD(0x07c, PIN_OUTPUT, 0) /* (F23) MCU_RGMII1_TD0 */
+			J721S2_WKUP_IOPAD(0x078, PIN_OUTPUT, 0) /* (G22) MCU_RGMII1_TD1 */
+			J721S2_WKUP_IOPAD(0x074, PIN_OUTPUT, 0) /* (E21) MCU_RGMII1_TD2 */
+			J721S2_WKUP_IOPAD(0x070, PIN_OUTPUT, 0) /* (E22) MCU_RGMII1_TD3 */
+			J721S2_WKUP_IOPAD(0x080, PIN_OUTPUT, 0) /* (F21) MCU_RGMII1_TXC */
+			J721S2_WKUP_IOPAD(0x068, PIN_OUTPUT, 0) /* (F22) MCU_RGMII1_TX_CTL */
+		>;
+	};
+
+	mcu_mdio_pins_default: mcu-mdio-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x09c, PIN_OUTPUT, 0) /* (A21) MCU_MDIO0_MDC */
+			J721S2_WKUP_IOPAD(0x098, PIN_INPUT, 0) /* (A22) MCU_MDIO0_MDIO */
+		>;
+	};
+
+	mcu_mcan0_pins_default: mcu-mcan0-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x0bc, PIN_INPUT, 0) /* (E28) MCU_MCAN0_RX */
+			J721S2_WKUP_IOPAD(0x0b8, PIN_OUTPUT, 0) /* (E27) MCU_MCAN0_TX */
+		>;
+	};
+
+	mcu_mcan1_pins_default: mcu-mcan1-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x0d4, PIN_INPUT, 0) /* (F26) WKUP_GPIO0_5.MCU_MCAN1_RX */
+			J721S2_WKUP_IOPAD(0x0d0, PIN_OUTPUT, 0) /* (C23) WKUP_GPIO0_4.MCU_MCAN1_TX*/
+		>;
+	};
+
+	mcu_i2c1_pins_default: mcu-i2c1-pins-default {
+		pinctrl-single,pins = <
+			J721S2_WKUP_IOPAD(0x0e0, PIN_INPUT, 0) /* (F24) WKUP_GPIO0_8.MCU_I2C1_SCL */
+			J721S2_WKUP_IOPAD(0x0e4, PIN_INPUT, 0) /* (H26) WKUP_GPIO0_9.MCU_I2C1_SDA */
+		>;
+	};
+};
+
+&main_gpio2 {
+	status = "disabled";
+};
+
+&main_gpio4 {
+	status = "disabled";
+};
+
+&main_gpio6 {
+	status = "disabled";
+};
+
+&wkup_gpio0 {
+	status = "disabled";
+};
+
+&wkup_gpio1 {
+	status = "disabled";
+};
+
+&wkup_uart0 {
+	status = "reserved";
+};
+
+&main_uart8 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_uart8_pins_default>;
+	/* Shared with TFA on this platform */
+	power-domains = <&k3_pds 357 TI_SCI_PD_SHARED>;
+};
+
+&main_i2c0 {
+	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 = "CSI_VIO_SEL", "CSI_SEL_FPC_EXPn", "HDMI_PDn",
+					"HDMI_LS_OE", "DP0_3V3 _EN", "BOARDID_EEPROM_WP",
+					"CAN_STB", " ", "GPIO_uSD_PWR_EN", "eDP_ENABLE",
+					"IO_EXP_PCIe1_M.2_RTSz", "IO_EXP_MCU_RGMII_RSTz",
+					"IO_EXP_CSI2_EXP_RSTz", " ", "CSI0_B_GPIO1",
+					"CSI1_B_GPIO1";
+	};
+};
+
+&main_sdhci0 {
+	/* Unused */
+	status = "disabled";
+};
+
+&main_sdhci1 {
+	/* SD card */
+	pinctrl-0 = <&main_mmc1_pins_default>;
+	pinctrl-names = "default";
+	disable-wp;
+	vmmc-supply = <&vdd_mmc1>;
+	vqmmc-supply = <&vdd_sd_dv>;
+};
+
+&mcu_cpsw {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_cpsw_pins_default &mcu_mdio_pins_default>;
+};
+
+&davinci_mdio {
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
+		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+		ti,min-output-impedance;
+	};
+};
+
+&cpsw_port1 {
+	phy-mode = "rgmii-rxid";
+	phy-handle = <&phy0>;
+};
+
+&mcu_mcan0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_mcan0_pins_default>;
+	phys = <&transceiver1>;
+};
+
+&mcu_mcan1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcu_mcan1_pins_default>;
+	phys = <&transceiver2>;
+};
+
+&main_mcan6 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan6_pins_default>;
+	phys = <&transceiver3>;
+};
+
+&main_mcan7 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan7_pins_default>;
+	phys = <&transceiver4>;
+};
-- 
2.36.1