Re: [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed

[Lucas Stach]

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 <cphe...@gmail.com>
> > Reviewed-by: Chris Healy <cphe...@gmail.com>
> > Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
> > Cc: Shawn Guo <shawn...@kernel.org>
> > Cc: Fabio Estevam <feste...@gmail.com>
> > Cc: Lucas Stach <l.st...@pengutronix.de>
> Cc: linux-arm-ker...@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org

Reviewed-by: Lucas Stach <l.st...@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";
>  };
>