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([2804:1b3:a800:b434:bc3c:5012:1fe:ac7c]) by smtp.gmail.com with ESMTPSA id 00721157ae682-81e6befb688sm5645667b3.14.2026.07.08.17.50.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jul 2026 17:50:22 -0700 (PDT) From: Fabio Estevam To: heiko@sntech.de Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, Fabio Estevam Subject: [PATCH] arm64: dts: rockchip: Enable USB device mode on rk3588s-roc-pc Date: Wed, 8 Jul 2026 21:50:05 -0300 Message-ID: <20260709005006.413145-1-festevam@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Fabio Estevam 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 --- arch/arm64/boot/dts/rockchip/rk3588s-roc-pc.dts | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-roc-pc.dts b/arch/arm64/boot/dts/rockchip/rk3588s-roc-pc.dts index 99853880aaac..7150d5f7684d 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588s-roc-pc.dts +++ b/arch/arm64/boot/dts/rockchip/rk3588s-roc-pc.dts @@ -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"; }; -- 2.43.0