arm64: dts: ti: k3-j784s4-j742s2-evm: Add overlay to enable USB0 Type-A

The USB0 instance of the USB controller on both the J742S2 EVM and the
J784S4 EVM supports 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, the USB3.1 Gen1 Type C interface is supported on both of the
EVMs. Enable the USB2.0 Type A interface by configuring the USB2.0_MUX_SEL
mux. Additionally, set the Dual-Role Mode to Host since a Type-A interface
is only associated with the Host Mode of operation.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Link: https://lore.kernel.org/r/20250409100853.4179934-1-s-vadapalli@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 4f8fcb69a2c1f1e5ea607f5a71fc016e51ca6584..73cec51d88aa496c285702e4bc6f7a83e2fc72e8 100644 (file)
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -129,6 +129,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm-pcie0-pcie1-ep.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm-quad-port-eth-exp1.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm-usxgmii-exp1-exp2.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-j784s4-j742s2-evm-usb0-type-a.dtbo
 
 # Boards with J742S2 SoC
 dtb-$(CONFIG_ARCH_K3) += k3-j742s2-evm.dtb
@@ -213,10 +214,14 @@ 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-j742s2-evm-usb0-type-a-dtbs := k3-j742s2-evm.dtb \
+       k3-j784s4-j742s2-evm-usb0-type-a.dtbo
 k3-j784s4-evm-pcie0-pcie1-ep-dtbs := k3-j784s4-evm.dtb \
        k3-j784s4-evm-pcie0-pcie1-ep.dtbo
 k3-j784s4-evm-quad-port-eth-exp1-dtbs := k3-j784s4-evm.dtb \
        k3-j784s4-evm-quad-port-eth-exp1.dtbo
+k3-j784s4-evm-usb0-type-a-dtbs := k3-j784s4-evm.dtb \
+       k3-j784s4-j742s2-evm-usb0-type-a.dtbo
 k3-j784s4-evm-usxgmii-exp1-exp2-dtbs := k3-j784s4-evm.dtb \
        k3-j784s4-evm-usxgmii-exp1-exp2.dtbo
 dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
@@ -247,8 +252,10 @@ 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-j742s2-evm-usb0-type-a.dtb \
        k3-j784s4-evm-pcie0-pcie1-ep.dtb \
        k3-j784s4-evm-quad-port-eth-exp1.dtb \
+       k3-j784s4-evm-usb0-type-a.dtb \
        k3-j784s4-evm-usxgmii-exp1-exp2.dtb
 
 # Enable support for device-tree overlays

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-evm-usb0-type-a.dtso b/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-evm-usb0-type-a.dtso
new file mode 100644 (file)
index 0000000..ba15d72
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-evm-usb0-type-a.dtso
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * DT Overlay for enabling USB0 instance of USB on J784S4 and J742S2 EVMs for
+ * Host Mode of operation with the Type-A Connector.
+ *
+ * J784S4 EVM Product Link: https://www.ti.com/tool/J784S4XEVM
+ * J742S2 EVM Product Link: https://www.ti.com/tool/J742S2XH01EVM
+ *
+ * Copyright (C) 2025 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&exp2 {
+       p12-hog {
+               /* P12 - USB2.0_MUX_SEL */
+               gpio-hog;
+               gpios = <12 GPIO_ACTIVE_HIGH>;
+               output-high;
+               line-name = "USB2.0_MUX_SEL";
+       };
+};
+
+&usb0 {
+       dr_mode = "host";
+};