linux-kernel - Re: [PATCH v2] ARM: dts: imx25: fix usbhost1 node

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Date:   Wed, 20 Nov 2019 09:29:55 +0100
From:   Michael Grzeschik <mgr@...gutronix.de>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     shawnguo@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        kernel@...gutronix.de, festevam@...il.com,
        devicetree@...r.kernel.org, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ARM: dts: imx25: fix usbhost1 node

On Fri, Nov 15, 2019 at 09:14:09PM +0100, Uwe Kleine-König wrote:
> Hello Michael,
> 
> On Fri, Nov 15, 2019 at 09:34:15AM +0100, Michael Grzeschik wrote:
> > The usb port represented by &usbhost1 uses an USB phy internal to the
> > SoC. We add the phy_type to the base dtsi so the board dts only have to
> > overwrite it if they use a different configuration. While at it we also
> > pin the usbhost port to host mode and limit the speed of the phy to
> > full-speed only, which it is only capable of.
> 
> The subject line suggests this is a fix but the commit log and the
> actual change don't support this. Maybe better:
> 
> 	ARM: dts: imx25: consolidate properties of usbhost1 in dtsi file
> 

Will send a new series with this suggestion.

> ? 
> 
> > diff --git a/arch/arm/boot/dts/imx25.dtsi b/arch/arm/boot/dts/imx25.dtsi
> > index 9a097ef014af5..40b95a290bd6b 100644
> > --- a/arch/arm/boot/dts/imx25.dtsi
> > +++ b/arch/arm/boot/dts/imx25.dtsi
> > @@ -570,6 +570,9 @@
> >  				clock-names = "ipg", "ahb", "per";
> >  				fsl,usbmisc = <&usbmisc 1>;
> >  				fsl,usbphy = <&usbphy1>;
> > +				maximum-speed = "full-speed";
> > +				phy_type = "serial";
> > +				dr_mode = "host";
> 
> Would it make sense to split this patch in two? One that moves phy_type
> and dr_mode from the dts files using imx25.dtsi (which has no effects on
> the resulting dtb files). And another that adds maximum-speed.

And a second patch including the speed limitation change.

Thanks,
Michael

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