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Wed, 28 Oct 2026 09:06:33 -0700 (PDT) Received: from z13-ek5.local ([151.40.161.170]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4aa81a896ecsm1625875e9.9.2026.10.28.09.06.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Oct 2026 09:06:33 -0700 (PDT) From: Ettore Chimenti Date: Wed, 28 Oct 2026 17:06:10 +0100 Subject: [PATCH v2 9/9] ARM: dts: omap: dm8168-evm: enable MUSB multipoint support X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261028-patch-ektor5-dm8168-dts-v2-9-4544429251e2@linaro.org> References: <20261028-patch-ektor5-dm8168-dts-v2-0-4544429251e2@linaro.org> In-Reply-To: <20261028-patch-ektor5-dm8168-dts-v2-0-4544429251e2@linaro.org> To: Aaro Koskinen , Andreas Kemnade , Kevin Hilman , Roger Quadros , Tony Lindgren , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Christopher Obbard , Andrew Goodbody , Paul Walmsley , Russell King , Rouven Czerwinski Cc: linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ettore Chimenti , Christopher Obbard X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1793203582; l=1428; i=ettore.chimenti@linaro.org; s=20261014; h=from:subject:message-id; bh=T/OTFeU/v/eoDvotZ5j14Er/J0T6ty7EyR4RK8RPU/Y=; b=tNkgUp3nDaJHGL2hMsaJN+z8EhlSjiujuDHYAdAC3akJpa5TYYAUeQyN7Hs7ubj5f3GxEPgs1 rlFx3lwxv9SDGeA63+/JqJUP3QwhstYNTZkSLFqa1KBjtDWJh1fPc6D X-Developer-Key: i=ettore.chimenti@linaro.org; a=ed25519; pk=wCaUblFVaqhuBTQt/hAtysafsAaEsqj/yOD9SPlz6NM= From: Christopher Obbard The DM8168 USB controllers are used in host mode and must advertise multipoint support to the MUSB core. Without this the kernel disables external hub support and warns: musb-hdrc: kernel must disable external hubs, please fix the configuration On the affected board this also prevents devices from enumerating reliably, with descriptor reads failing with -EPROTO: usb 1-1: device descriptor read/all, error -71 Set mentor,multipoint to the default value of 1 for both MUSB instances. With this enabled, USB devices enumerate successfully on the host ports. Signed-off-by: Christopher Obbard Signed-off-by: Ettore Chimenti --- arch/arm/boot/dts/ti/omap/dm8168-evm.dts | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm/boot/dts/ti/omap/dm8168-evm.dts b/arch/arm/boot/dts/ti/omap/dm8168-evm.dts index a6d42766a496..4b4e4d850231 100644 --- a/arch/arm/boot/dts/ti/omap/dm8168-evm.dts +++ b/arch/arm/boot/dts/ti/omap/dm8168-evm.dts @@ -198,17 +198,14 @@ &mmc1 { wp-gpios = <&gpio2 8 GPIO_ACTIVE_HIGH>; }; -/* At least dm8168-evm rev c won't support multipoint, later may */ &usb0 { pinctrl-names = "default"; pinctrl-0 = <&usb0_pins>; - mentor,multipoint = <0>; }; &usb1 { pinctrl-names = "default"; pinctrl-0 = <&usb1_pins>; - mentor,multipoint = <0>; }; &sata { -- 2.56.0