linux-kernel - Re: [Linux-kernel-mentees] [PATCH v1] gpio: ml: ioh: Convert to dev_pm

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Message-ID: <CAHp75Vfpj+ENMe9u-SMKfvCsyFtOucUT9bD3qfWX+QjccZ9ZyQ@mail.gmail.com>
Date:   Thu, 2 Apr 2020 23:23:27 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Vaibhav Gupta <vaibhavgupta40@...il.com>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Shuah Khan <skhan@...uxfoundation.org>, bjorn@...gaas.com,
        andy@...nel.org, Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Linux-kernel-mentees] [PATCH v1] gpio: ml: ioh: Convert to dev_pm_ops

On Thu, Apr 2, 2020 at 11:16 PM Bjorn Helgaas <helgaas@...nel.org> wrote:
>
> On Thu, Apr 02, 2020 at 09:33:46PM +0300, Andy Shevchenko wrote:
> > On Thu, Apr 2, 2020 at 6:52 PM Vaibhav Gupta <vaibhavgupta40@...il.com> wrote:
> > >
> > > Convert the legacy callback .suspend() and .resume()
> > > to the generic ones.
> >
> > Thank you for the patch.
> >
> > Rather then doing this I think  the best approach is to unify gpio-pch
> > and gpio-ml-ioh together.
> > Under umbrella of the task, the clean ups like above are highly appreciated.
>
> I'd be all in favor of that, but what Vaibhav is working toward is
> eliminating use of legacy PM in PCI drivers.  I think unifying drivers
> is really out of scope for that project.
>
> If you'd rather leave gpio-ml-ioh.c alone for now, I suggest that
> Vaibhav move on to other PCI drivers that use legacy PM.  If we
> convert all the others away from legacy PM and gpio-ml-ioh.c is the
> only one remaining, then I guess we can revisit this :)

Then skip this driver for good.

> Or, maybe converting gpio-ml-ioh.c now, along the lines of
> 226e6b866d74 ("gpio: pch: Convert to dev_pm_ops"), would be one small
> step towards the eventual unification, by making gpio-pch and
> gpio-ml-ioh a little more similar.

I think it will delay the real work here (very old code motivates
better to get rid of it then semi-fixed one).
Thank you for your understanding.

-- 
With Best Regards,
Andy Shevchenko