linux-kernel - Re: [PATCH 01/29] usb: dwc3: Discard synopsys,dwc3 compatibility string

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Message-ID: <20201020122801.GB126891@kozik-lap>
Date:   Tue, 20 Oct 2020 14:28:01 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Felipe Balbi <balbi@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Serge Semin <fancer.lancer@...il.com>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        USB <linux-usb@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/29] usb: dwc3: Discard synopsys,dwc3 compatibility
 string

On Tue, Oct 20, 2020 at 03:15:06PM +0300, Andy Shevchenko wrote:
> On Tue, Oct 20, 2020 at 3:02 PM Serge Semin
> <Sergey.Semin@...kalelectronics.ru> wrote:
> >
> > Syonpsys IP cores are supposed to be defined with "snps" vendor-prefix.
> > Discard a DW USB3 compatible string with the deprecated prefix seeing
> > one isn't used by any dts file anymore.
> 
> I'm afraid it's no go.
> It's an ABI from the moment when the driver started supporting this
> compatible string.

Exactly.

Please mark the compatible as deprecated in bindings, correct the DTSes
and optionally after one or two years (or any time later) remove the
support for deprecated bindings.

Best regards,
Krzysztof