J784S4 EVM board is designed for TI J784S4 SoC. It supports the following
interfaces:
* 32 GB DDR4 RAM
* x2 Gigabit Ethernet interfaces capable of working in Switch and MAC mode
* x1 Input Audio Jack, x1 Output Audio Jack
* x1 USB2.0 Hub with two Type A host and x1 USB 3.1 Type-C Port
* x2 4L PCIe connector
* x1 UHS-1 capable micro-SD card slot
* 512 Mbit OSPI flash, 1 Gbit Octal NAND flash, 512 Mbit QSPI flash,
  UFS flash.
* x6 UART through UART-USB bridge
* XDS110 for onboard JTAG debug using USB
* Temperature sensors, user push buttons and LEDs
* 40-pin User Expansion Connector
* x2 ENET Expansion Connector, x1 GESI expander, x2 Display connector
* x1 15-pin CSI header
* x6 MCAN instances

Add basic support for J784S4-EVM.

Schematics: https://www.ti.com/lit/zip/sprr458

Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Apurva Nandan <a-nandan@ti.com>
Tested-by: Manorit Chawdhry <m-chawdhry@ti.com>
---
 arch/arm64/boot/dts/ti/Makefile          |   2 +
 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 196 +++++++++++++++++++++++
 2 files changed, 198 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index cf7c509538a4..27b2e1f5555e 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -20,6 +20,8 @@ dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
 
 dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
 
+dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
+
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
 
diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
new file mode 100644
index 000000000000..8cd4a7ecc121
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
@@ -0,0 +1,196 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ * EVM Board Schematics: https://www.ti.com/lit/zip/sprr458
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/net/ti-dp83867.h>
+#include <dt-bindings/gpio/gpio.h>
+#include "k3-j784s4.dtsi"
+
+/ {
+	compatible = "ti,j784s4-evm", "ti,j784s4";
+	model = "Texas Instruments J784S4 EVM";
+
+	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;
+		};
+	};
+
+	evm_12v0: regulator-evm12v0 {
+		/* main supply */
+		compatible = "regulator-fixed";
+		regulator-name = "evm_12v0";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vsys_3v3: regulator-vsys3v3 {
+		/* Output of LM5140 */
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&evm_12v0>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	vsys_5v0: regulator-vsys5v0 {
+		/* Output of LM5140 */
+		compatible = "regulator-fixed";
+		regulator-name = "vsys_5v0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&evm_12v0>;
+		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 = <&exp2 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 8 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x0>,
+			 <3300000 0x1>;
+	};
+};
+
+&main_pmx0 {
+	main_uart8_pins_default: main-uart8-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x040, PIN_INPUT, 14) /* (AF37) MCASP0_AXR0.UART8_CTSn */
+			J784S4_IOPAD(0x044, PIN_OUTPUT, 14) /* (AG37) MCASP0_AXR1.UART8_RTSn */
+			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 */
+		>;
+	};
+
+	vdd_sd_dv_pins_default: vdd-sd-dv-pins-default {
+		pinctrl-single,pins = <
+			J784S4_IOPAD(0x020, PIN_INPUT, 7) /* (AJ35) MCAN15_RX.GPIO0_8 */
+		>;
+	};
+};
+
+&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@20 {
+		compatible = "ti,tca6416";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "PCIE1_2L_MODE_SEL", "PCIE1_4L_PERSTZ", "PCIE1_2L_RC_RSTZ",
+				  "PCIE1_2L_EP_RST_EN", "PCIE0_4L_MODE_SEL", "PCIE0_4L_PERSTZ",
+				  "PCIE0_4L_RC_RSTZ", "PCIE0_4L_EP_RST_EN", "PCIE1_4L_PRSNT#",
+				  "PCIE0_4L_PRSNT#", "CDCI1_OE1/OE4", "CDCI1_OE2/OE3",
+				  "AUDIO_MUX_SEL", "EXP_MUX2", "EXP_MUX3", "GESI_EXP_PHY_RSTZ";
+	};
+
+	exp2: gpio@22 {
+		compatible = "ti,tca6424";
+		reg = <0x22>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "R_GPIO_RGMII1_RST", "ENET2_I2CMUX_SEL", "GPIO_USD_PWR_EN",
+				  "USBC_PWR_EN", "USBC_MODE_SEL1", "USBC_MODE_SEL0",
+				  "GPIO_LIN_EN", "R_CAN_STB", "CTRL_PM_I2C_OE#",
+				  "ENET2_EXP_PWRDN", "ENET2_EXP_SPARE2", "CDCI2_RSTZ",
+				  "USB2.0_MUX_SEL", "CANUART_MUX_SEL0", "CANUART_MUX2_SEL1",
+				  "CANUART_MUX1_SEL1", "ENET1_EXP_PWRDN", "ENET1_EXP_RESETZ",
+				  "ENET1_I2CMUX_SEL", "ENET1_EXP_SPARE2", "ENET2_EXP_RESETZ",
+				  "USER_INPUT1", "USER_LED1", "USER_LED2";
+	};
+};
+
+&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";
+};
-- 
2.34.1

On 12/01/23 19:57, Apurva Nandan wrote:
> J784S4 EVM board is designed for TI J784S4 SoC. It supports the following
> interfaces:
> * 32 GB DDR4 RAM
> * x2 Gigabit Ethernet interfaces capable of working in Switch and MAC mode
> * x1 Input Audio Jack, x1 Output Audio Jack
> * x1 USB2.0 Hub with two Type A host and x1 USB 3.1 Type-C Port
> * x2 4L PCIe connector
> * x1 UHS-1 capable micro-SD card slot
> * 512 Mbit OSPI flash, 1 Gbit Octal NAND flash, 512 Mbit QSPI flash,
>   UFS flash.
> * x6 UART through UART-USB bridge
> * XDS110 for onboard JTAG debug using USB
> * Temperature sensors, user push buttons and LEDs
> * 40-pin User Expansion Connector
> * x2 ENET Expansion Connector, x1 GESI expander, x2 Display connector
> * x1 15-pin CSI header
> * x6 MCAN instances
> 
> Add basic support for J784S4-EVM.
> 
> Schematics: https://www.ti.com/lit/zip/sprr458
> 
> Signed-off-by: Hari Nagalla <hnagalla@ti.com>
> Signed-off-by: Nishanth Menon <nm@ti.com>
> Signed-off-by: Apurva Nandan <a-nandan@ti.com>
> Tested-by: Manorit Chawdhry <m-chawdhry@ti.com>
> ---
>  arch/arm64/boot/dts/ti/Makefile          |   2 +
>  arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 196 +++++++++++++++++++++++
>  2 files changed, 198 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> 
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index cf7c509538a4..27b2e1f5555e 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -20,6 +20,8 @@ dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
>  
>  dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
>  
> +dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
> +
>  dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
>  
> diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> new file mode 100644
> index 000000000000..8cd4a7ecc121
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> @@ -0,0 +1,196 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> + *
> + * EVM Board Schematics: https://www.ti.com/lit/zip/sprr458
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/net/ti-dp83867.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include "k3-j784s4.dtsi"
> +
> +/ {
> +	compatible = "ti,j784s4-evm", "ti,j784s4";
> +	model = "Texas Instruments J784S4 EVM";
> +
> +	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;
> +		};
> +	};
> +
> +	evm_12v0: regulator-evm12v0 {
> +		/* main supply */
> +		compatible = "regulator-fixed";
> +		regulator-name = "evm_12v0";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	vsys_3v3: regulator-vsys3v3 {
> +		/* Output of LM5140 */
> +		compatible = "regulator-fixed";
> +		regulator-name = "vsys_3v3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		vin-supply = <&evm_12v0>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	vsys_5v0: regulator-vsys5v0 {
> +		/* Output of LM5140 */
> +		compatible = "regulator-fixed";
> +		regulator-name = "vsys_5v0";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		vin-supply = <&evm_12v0>;
> +		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 = <&exp2 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 8 GPIO_ACTIVE_HIGH>;
> +		states = <1800000 0x0>,
> +			 <3300000 0x1>;
> +	};
> +};
> +
> +&main_pmx0 {
> +	main_uart8_pins_default: main-uart8-pins-default {
> +		pinctrl-single,pins = <
> +			J784S4_IOPAD(0x040, PIN_INPUT, 14) /* (AF37) MCASP0_AXR0.UART8_CTSn */
> +			J784S4_IOPAD(0x044, PIN_OUTPUT, 14) /* (AG37) MCASP0_AXR1.UART8_RTSn */
> +			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 */
> +		>;
> +	};
> +
> +	vdd_sd_dv_pins_default: vdd-sd-dv-pins-default {
> +		pinctrl-single,pins = <
> +			J784S4_IOPAD(0x020, PIN_INPUT, 7) /* (AJ35) MCAN15_RX.GPIO0_8 */
> +		>;
> +	};
> +};
> +
> +&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@20 {
> +		compatible = "ti,tca6416";
> +		reg = <0x20>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		gpio-line-names = "PCIE1_2L_MODE_SEL", "PCIE1_4L_PERSTZ", "PCIE1_2L_RC_RSTZ",
> +				  "PCIE1_2L_EP_RST_EN", "PCIE0_4L_MODE_SEL", "PCIE0_4L_PERSTZ",
> +				  "PCIE0_4L_RC_RSTZ", "PCIE0_4L_EP_RST_EN", "PCIE1_4L_PRSNT#",
> +				  "PCIE0_4L_PRSNT#", "CDCI1_OE1/OE4", "CDCI1_OE2/OE3",
> +				  "AUDIO_MUX_SEL", "EXP_MUX2", "EXP_MUX3", "GESI_EXP_PHY_RSTZ";
> +	};
> +
> +	exp2: gpio@22 {
> +		compatible = "ti,tca6424";
> +		reg = <0x22>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		gpio-line-names = "R_GPIO_RGMII1_RST", "ENET2_I2CMUX_SEL", "GPIO_USD_PWR_EN",
> +				  "USBC_PWR_EN", "USBC_MODE_SEL1", "USBC_MODE_SEL0",
> +				  "GPIO_LIN_EN", "R_CAN_STB", "CTRL_PM_I2C_OE#",
> +				  "ENET2_EXP_PWRDN", "ENET2_EXP_SPARE2", "CDCI2_RSTZ",
> +				  "USB2.0_MUX_SEL", "CANUART_MUX_SEL0", "CANUART_MUX2_SEL1",
> +				  "CANUART_MUX1_SEL1", "ENET1_EXP_PWRDN", "ENET1_EXP_RESETZ",
> +				  "ENET1_I2CMUX_SEL", "ENET1_EXP_SPARE2", "ENET2_EXP_RESETZ",
> +				  "USER_INPUT1", "USER_LED1", "USER_LED2";
> +	};
> +};
> +
> +&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";

Reviewed-by: Vaishnav Achath <vaishnav.a@ti.com>

Also, boot logs during my testing of the latest series on J784S4 EVM :

https://gist.github.com/vaishnavachath/2b845d82a3fd44ca70565f6337b0e5ab

> +};

-- 
Regards,
Vaishnav