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arm64: dts: ti: k3-j721s2-evm: Add overlay to enable USB0 Type-A

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The J721S2-EVM (J721S2-SOM mounted on the J7 Common Processor Board) has
a single instance of USB namely USB0. On the board, USB0 can be enabled
using a single USB interface at a time among the following:
1. USB3.1 Gen1 Type C interface
2. Two USB2.0 Type A interfaces via an on-board USB Hub

By default, USB0 is enabled using the USB3.1 Gen1 Type C interface. Hence,
add a device-tree overlay to allow using USB0 with the USB2.0 Type A
interfaces by configuring the "USB2.0_MUX_SEL" mux. Also, since the Type A
interfaces only connect to USB Devices with USB0 acting as the USB Host,
set the Dual-Role mode for USB0 to Host.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Link: https://patch.msgid.link/20250912062021.2906034-1-s-vadapalli@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Siddharth Vadapalli 2025-09-12 11:50:14 +05:30 committed by Nishanth Menon
parent e53fbf955e
commit fcfedcb680
2 changed files with 32 additions and 0 deletions
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4
arch/arm64/boot/dts/ti/Makefile
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@ -134,6 +134,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-j721s2-evm-gesi-exp-board.dtbo
k3-j721s2-evm-dtbs := k3-j721s2-common-proc-board.dtb k3-j721s2-evm-gesi-exp-board.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-j721s2-evm.dtb
dtb-$(CONFIG_ARCH_K3) += k3-j721s2-evm-pcie1-ep.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-j721s2-evm-usb0-type-a.dtbo
# Boards with J722s SoC
dtb-$(CONFIG_ARCH_K3) += k3-am67a-beagley-ai.dtb
@ -235,6 +236,8 @@ k3-j721e-sk-csi2-dual-imx219-dtbs := k3-j721e-sk.dtb \
k3-j721e-sk-csi2-dual-imx219.dtbo
k3-j721s2-evm-pcie1-ep-dtbs := k3-j721s2-common-proc-board.dtb \
k3-j721s2-evm-pcie1-ep.dtbo
k3-j721s2-evm-usb0-type-a-dtbs := k3-j721s2-common-proc-board.dtb \
k3-j721s2-evm-usb0-type-a.dtbo
k3-j722s-evm-csi2-quad-rpi-cam-imx219-dtbs := k3-j722s-evm.dtb \
k3-j722s-evm-csi2-quad-rpi-cam-imx219.dtbo
k3-j722s-evm-csi2-quad-tevi-ov5640-dtbs := k3-j722s-evm.dtb \
@ -277,6 +280,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
k3-j721e-evm-pcie1-ep.dtb \
k3-j721e-sk-csi2-dual-imx219.dtb \
k3-j721s2-evm-pcie1-ep.dtb \
k3-j721s2-evm-usb0-type-a.dtb \
k3-j722s-evm-csi2-quad-rpi-cam-imx219.dtb \
k3-j722s-evm-csi2-quad-tevi-ov5640.dtb \
k3-j742s2-evm-usb0-type-a.dtb \

28
arch/arm64/boot/dts/ti/k3-j721s2-evm-usb0-type-a.dtso Normal file
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@ -0,0 +1,28 @@
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/**
* DT Overlay for enabling USB0 instance of USB in the Host Mode of operation
* with the Type-A Connector on the J7 common processor board.
*
* J7 Common Processor Board Product Link: https://www.ti.com/tool/J721EXCPXEVM
*
* Copyright (C) 2025 Texas Instruments Incorporated - https://www.ti.com/
*/
/dts-v1/;
/plugin/;
#include <dt-bindings/gpio/gpio.h>
&exp_som {
p0-hog {
/* P0 - USB2.0_MUX_SEL */
gpio-hog;
gpios = <0 GPIO_ACTIVE_HIGH>;
output-high;
line-name = "USB2.0_MUX_SEL";
};
};
&usb0 {
dr_mode = "host";
};