linux-kernel - Re: [RFC 0/1] Platform driver support for 'amd5536udc' driver

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Message-ID: <CAEHZuqNK07Xku9SmFhV0DJ4apV0m8yWznuFDwjr33CDP_OcXew@mail.gmail.com>
Date:   Fri, 6 Jan 2017 12:29:12 +0530
From:   Raviteja Garimella <raviteja.garimella@...adcom.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        linux-usb@...r.kernel.org, John Youn <John.Youn@...opsys.com>
Subject: Re: [RFC 0/1] Platform driver support for 'amd5536udc' driver

Hi Arnd,

On Fri, Jan 6, 2017 at 3:33 AM, Arnd Bergmann <arnd@...db.de> wrote:
> On Thursday, January 5, 2017 1:53:16 PM CET Raviteja Garimella wrote:
>> The UDC is based on Synopsys Designware core USB (2.0) Device controller
>> IP.
> ...
>> This is a request for comments from maintainers/others regarding approach
>> on whether to have 2 different drivers (one each for AMD and Broadcom)
>> with a common library (3 files in total), or have a single driver like
>> it's done in this patch and have the driver filename changed to some
>> common name based on ther underlying IP, like snps_udc.c.
>
> I have not looked at the code at all, so sorry for my ignorance, but
> isn't the IP block you describe the one that drivers/usb/dwc2/ is for?
> Could you add support for the Broadcom hardware there instead?

The current driver I submitted is for a different Synopsys IP (USB
Device Controller IP,
not the HS OTG). It's confirmed by John Youn (from Synopsys) earlier.

Thanks,
Ravi
>
>         Arnd