linux-kernel - Re: [PATCH v4 5/5] usb: host: add xhci-exynos driver

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Message-ID: <20220428075305.GH151827@ubuntu>
Date:   Thu, 28 Apr 2022 16:53:05 +0900
From:   Jung Daehwan <dh10.jung@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "open list:USB XHCI DRIVER" <linux-usb@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Howard Yen <howardyen@...gle.com>,
        Jack Pham <jackp@...eaurora.org>,
        Puma Hsu <pumahsu@...gle.com>,
        "J . Avila" <elavila@...gle.com>, sc.suh@...sung.com,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Subject: Re: [PATCH v4 5/5] usb: host: add xhci-exynos driver

On Thu, Apr 28, 2022 at 09:31:56AM +0200, Krzysztof Kozlowski wrote:
> On 28/04/2022 08:36, Jung Daehwan wrote:
> >>
> >> Since you called everything here as "exynos" it is specific to one
> >> hardware and not-reusable on anything else. How can then you use some
> >> other compatible? It would be a misuse of Devicetree bindings.
> >>
> > 
> > I got it. Let me add them. Is it still necessary if it is only used by
> > other module on runtime as I said above?
> 
> Except what Greg wrote, if by "other module" you mean out-of-tree, then
> the patchset will not be accepted as it is unusable for Linux users.
> Basically it would be a dead code in Linux kernel.
> 
> Best regards,
> Krzysztof
> 

I wanted to submit patches of just xhci. Let me add a patch together of other
module(dwc3-exynos) that is in-tree on next submission.

Is it still necessary to add compatible or bindings in this case?

Best Regards,
Jung Daehwan