Messages in this thread | | | Subject | Re: [PATCH 3/3] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed | From | Lucas Stach <> | Date | Wed, 22 May 2019 11:33:21 +0200 |
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Hi Andrey,
Am Mittwoch, den 22.05.2019, 00:12 -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.
Really? I thought this issue is specific to the RDU1, but you've been looking at this USB stuff for a lot longer than me.
Regards, Lucas
> Reported-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 5484e4b87975..3b37fe68d373 100644 > --- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi > +++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi > @@ -772,6 +772,7 @@ > &usbh1 { > vbus-supply = <®_5p0v_main>; > disable-over-current; > + maximum-speed = "full-speed"; > status = "okay"; > }; >
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