linux-kernel - Re: [PATCH] soc: add aspeed folder and misc drivers

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Date:   Tue, 23 Apr 2019 08:40:25 -0700
From:   Patrick Venture <venture@...gle.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     gregkh <gregkh@...uxfoundation.org>, Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed@...ts.ozlabs.org, arm-soc <arm@...nel.org>
Subject: Re: [PATCH] soc: add aspeed folder and misc drivers

On Tue, Apr 23, 2019 at 8:33 AM Arnd Bergmann <arnd@...db.de> wrote:
>
> On Tue, Apr 23, 2019 at 4:24 PM Patrick Venture <venture@...gle.com> wrote:
> >
> > On Tue, Apr 23, 2019 at 1:08 AM Arnd Bergmann <arnd@...db.de> wrote:
> > >
> > > On Mon, Apr 22, 2019 at 7:38 PM Patrick Venture <venture@...gle.com> wrote:
> > > >
> > > > Create a SoC folder for the ASPEED parts and place the misc drivers
> > > > currently present into this folder.  These drivers are not generic part
> > > > drivers, but rather only apply to the ASPEED SoCs.
> > > >
> > > > Signed-off-by: Patrick Venture <venture@...gle.com>
> > >
> > > Looks ok, but please resend to arm@...nel.org or soc@...nel.org
> > > so we can track the submission and make sure it gets applied if
> > > you want this to go through the arm-soc tree.
> >
> > Thanks, I didn't see those come up in the get_maintainers output.
> >
> > I had a longer question related to this patch progression -- if I am
> > moving the aspeed gpio driver to the soc folder, the soc tree may have
> > the soc/aspeed folder in their next, but the gpio tree wouldn't
> > necessarily.  I know the branches sync up when things are merged at
> > the top, but I wasn't sure if there was another mechanism for this?
>
> We can generally deal with merge conflicts like this, or you can ask
> the respective maintainers about it and let us figure something out.

Thanks for explaining that.

>
> In this particular case, why would you move the gpio driver into
> the soc folder? If there is a proper subsystem for a driver, it should
> not be in drivers/misc or drivers/soc.

Ok, that makes sense. I was trying to get a sense of what belonged in
soc versus the subsystem folders.  My thinking from the limited
reading was the purpose of a SoC folder was to contain the drivers
that were only associated with a system-on-a-chip and not a part you
could buy and place on any board.  A tmp421 sensor is just a generic
part, versus the pwm controller, which is only for the specific SoCs.

That said, there are quite a few misc drivers associated with the
Aspeed parts -- and there are two under review now, so there's a
strong motivation to move those at least into the soc/aspeed folder.
Thanks for these clarifying remarks.

>
>        Arnd