linux-kernel - [PATCH 5.5 131/399] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed

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Message-Id: <20200221072415.204550872@linuxfoundation.org>
Date:   Fri, 21 Feb 2020 08:37:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.5 131/399] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed

From: Andrey Smirnov <andrew.smirnov@...il.com>

[ Upstream commit 6bb1e09c4c375db29770444f689f35f5cbe696bc ]

Cabling used to connect devices to USBH1 on RDU2 does not meet USB
spec cable quality and cable length requirements to operate at High
Speed, so limit the port to Full Speed only.

Reported-by: Chris Healy <cphealy@...il.com>
Reviewed-by: Chris Healy <cphealy@...il.com>
Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: Shawn Guo <shawnguo@...nel.org>
Cc: Fabio Estevam <festevam@...il.com>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
index 4ec9fb332610e..cbafadbe86f45 100644
--- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
@@ -776,6 +776,7 @@
 &usbh1 {
 	vbus-supply = <&reg_5p0v_main>;
 	disable-over-current;
+	maximum-speed = "full-speed";
 	status = "okay";
 };
 
-- 
2.20.1