linux-kernel - Re: [PATCH 6/6] arm64: dts: ti: k3-j7200: use J7200-specific USB compatible

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Message-Id: <CWYHP2PTNVNT.316KO84HP5CZV@tleb-bootlin-xps13-01>
Date:   Tue, 14 Nov 2023 12:14:38 +0100
From:   Théo Lebrun <theo.lebrun@...tlin.com>
To:     "Gregory CLEMENT" <gregory.clement@...tlin.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Conor Dooley" <conor+dt@...nel.org>,
        "Roger Quadros" <rogerq@...nel.org>,
        "Peter Chen" <peter.chen@...nel.org>,
        "Pawel Laszczak" <pawell@...ence.com>,
        "Nishanth Menon" <nm@...com>,
        "Vignesh Raghavendra" <vigneshr@...com>,
        "Tero Kristo" <kristo@...nel.org>
Cc:     <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 6/6] arm64: dts: ti: k3-j7200: use J7200-specific USB
 compatible

Hello,

On Tue Nov 14, 2023 at 11:01 AM CET, Gregory CLEMENT wrote:
> > ---
> > diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> > index 709081cd1e7f..581905d9199e 100644
> > --- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> > +++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> > @@ -788,7 +788,7 @@ pcie1_ep: pcie-ep@...0000 {
> >  	};
> >  
> >  	usbss0: cdns-usb@...4000 {
> > -		compatible = "ti,j721e-usb";
> > +		compatible = "ti,j7200-usb";
>
> What about keeping the old compatible as fallback in the unlikley case
> we have a new dtb with an old kernel ?

I see the usecase; that will be done in V2.

Thanks,

--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com