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From: Lucas Stach <l.stach@pengutronix.de>
To: Andrey Smirnov <andrew.smirnov@gmail.com>,
	 linux-arm-kernel@lists.infradead.org
Cc: Fabio Estevam <festevam@gmail.com>,
	Shawn Guo <shawnguo@kernel.org>,
	linux-kernel@vger.kernel.org, Chris Healy <cphealy@gmail.com>
Subject: Re: [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed
Date: Wed, 29 May 2019 10:27:40 +0200
Message-ID: <1559118460.4039.19.camel@pengutronix.de> (raw)
In-Reply-To: <20190529071843.24767-3-andrew.smirnov@gmail.com>

Am Mittwoch, den 29.05.2019, 00:18 -0700 schrieb Andrey Smirnov:
> 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

Reviewed-by: Lucas Stach <l.stach@pengutronix.de>

> ---
>  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";
>  };
>  

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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 ` [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed Andrey Smirnov
2019-05-29  8:27   ` Lucas Stach [this message]
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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