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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>,
	Shawn Guo <shawnguo@kernel.org>,
	linux-kernel@vger.kernel.org, Fabio Estevam <festevam@gmail.com>,
	Chris Healy <cphealy@gmail.com>,
	Lucas Stach <l.stach@pengutronix.de>
Subject: [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed
Date: Wed, 29 May 2019 00:18:43 -0700
Message-ID: <20190529071843.24767-3-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190529071843.24767-1-andrew.smirnov@gmail.com>

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>
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
---
 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 04d4d4d7e43c..e1d8478884f9 100644
--- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
@@ -805,6 +805,7 @@
 &usbh1 {
 	vbus-supply = <&reg_5p0v_main>;
 	disable-over-current;
+	maximum-speed = "full-speed";
 	status = "okay";
 };
 
-- 
2.21.0


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Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-29  7:18 [PATCH 1/3] ARM: dts: imx6: rdu2: Add node for UCS1002 USB charger chip Andrey Smirnov
2019-05-29  7:18 ` [PATCH 2/3] ARM: dts: imx6: rdu2: Disable WP for USDHC2 and USDHC3 Andrey Smirnov
2019-05-29  8:27   ` Lucas Stach
2019-05-29  7:18 ` Andrey Smirnov [this message]
2019-05-29  8:27   ` [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed Lucas Stach
2019-05-29  7:22 ` [PATCH 1/3] ARM: dts: imx6: rdu2: Add node for UCS1002 USB charger chip Andrey Smirnov
2019-05-29  8:27 ` Lucas Stach
  -- strict thread matches above, loose matches on Subject: below --
2019-05-22  7:12 Andrey Smirnov
2019-05-22  7:12 ` [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed Andrey Smirnov
2019-05-22  9:33   ` Lucas Stach
2019-05-22 17:56     ` Andrey Smirnov
2019-05-22 18:10       ` Chris Healy

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