release/5.2.40/ARM-dts-imx6-rdu2-Limit-USBH1-to-Full-Speed.patch

From 88bc122800f405e4d94fad0b6a05522acd42ce7b Mon Sep 17 00:00:00 2001
From: Andrey Smirnov <andrew.smirnov@gmail.com>
Date: Mon, 9 Dec 2019 08:50:18 -0800
Subject: [PATCH] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed

commit 6bb1e09c4c375db29770444f689f35f5cbe696bc upstream.

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@gmail.com>
Reviewed-by: Chris Healy <cphealy@gmail.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
index 7b5c0e9b0fcf..a66c4fac6baf 100644
--- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
@@ -774,6 +774,7 @@
 &usbh1 {
 	vbus-supply = <&reg_5p0v_main>;
 	disable-over-current;
+	maximum-speed = "full-speed";
 	status = "okay";
 };
 
-- 
2.7.4