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arm64: dts: rockchip: Enable USB device mode on rk3588s-roc-pc

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The USB3 OTG controller on the ROC-PC can be used in device mode,
but the board description only enabled the DWC3 controller and USB2 PHY.
The USBDP PHY remained disabled and the controller had no role-switch
default, so DWC3 did not register a UDC and USB gadget drivers such
as g_mass_storage failed to bind.

Enable the USBDP PHY and describe the controller as a USB role switch
with peripheral as the default role. This lets the controller register
as a UDC when no external role provider has selected a host role.

Tested on a Firefly Station M3 by binding g_mass_storage to expose the
eMMC as a USB mass-storage gadget.

Signed-off-by: Fabio Estevam <festevam@nabladev.com>
Link: https://patch.msgid.link/20260709005006.413145-1-festevam@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Fabio Estevam 2026-07-08 21:50:05 -03:00 committed by Heiko Stuebner
parent b4db45b3ec
commit 02b9bc288b
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/boot/dts/rockchip/rk3588s-roc-pc.dts
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@ -833,6 +833,12 @@ &usb_host0_ohci {
&usb_host0_xhci {
extcon = <&u2phy0>;
role-switch-default-mode = "peripheral";
usb-role-switch;
status = "okay";
};
&usbdp_phy0 {
status = "okay";
};