linux-kernel - Re: [PATCH 3/6] gpio: dt-bindings: Add documentation for gpio controllers on Armada 7K/8K

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Message-ID: <877f0xt7ft.fsf@free-electrons.com>
Date:   Wed, 31 May 2017 16:41:26 +0200
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     Michael Turquette <mturquette@...libre.com>
Cc:     Rob Herring <robh@...nel.org>,
        "Linus Walleij" <linus.walleij@...aro.org>,
        "Stephen Boyd" <sboyd@...eaurora.org>,
        "Alexandre Courbot" <gnurou@...il.com>,
        "linux-gpio\@vger.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        "Jason Cooper" <jason@...edaemon.net>,
        "Andrew Lunn" <andrew@...n.ch>,
        "Sebastian Hesselbarth" <sebastian.hesselbarth@...il.com>,
        "Thomas Petazzoni" <thomas.petazzoni@...e-electrons.com>,
        "linux-arm-kernel\@lists.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree\@vger.kernel.org" <devicetree@...r.kernel.org>,
        "Russell King" <rmk+kernel@...linux.org.uk>,
        "Nadav Haklai" <nadavh@...vell.com>,
        "Kostya Porotchkin" <kostap@...vell.com>,
        "Neta Zur Hershkovits" <neta@...vell.com>,
        "Marcin Wojtas" <mw@...ihalf.com>,
        "Omri Itach" <omrii@...vell.com>,
        "Shadi Ammouri" <shadi@...vell.com>
Subject: Re: [PATCH 3/6] gpio: dt-bindings: Add documentation for gpio controllers on Armada 7K/8K

Hi Michael,
 
 On mer., mai 31 2017, Michael Turquette <mturquette@...libre.com> wrote:

> Quoting Rob Herring (2017-05-31 07:23:58)
>> On Mon, May 29, 2017 at 10:08:16AM +0200, Linus Walleij wrote:
>> > On Tue, May 23, 2017 at 3:06 PM, Gregory CLEMENT
>> > <gregory.clement@...e-electrons.com> wrote:
>> > >  On mar., mai 23 2017, Linus Walleij <linus.walleij@...aro.org> wrote:
>> > 
>> > >> Please rebase and resend the rest of the patches.
>> > >
>> > > Actually I was wrong with my assumption that there was no dependency.
>> > > For the binding documentation there is dependecy accross the series I
>> > > sent.
>> > >
>> > > This patch depends on "pinctrl: dt-bindings: add documentation for AP806
>> > > pin controllers" [1] and "pinctrl: dt-bindings: add documentation for
>> > > CP110 pin controllers" [3] from the series "Add support for the pin
>> > > controllers on the Marvell Armada 7K/8K".
>> > >
>> > > As you are maintainer of both gpio and pinctrl subsystem it will be easy
>> > > to resolv.
>> > 
>> > Please send all patches in one big series in that case, so I can apply
>> > them all to a branch and merge that branch into both trees.
>> > 
>> > > But these last patches depend also on "clk: mvebu: ap806: introduce a
>> > > new binding" [3] in the clock series "Improve ap806 clk support on
>> > > Marvell Armada 7K/8K" and on "clk: mvebu: cp110: introduce a new
>> > > binding" [4] in the clock series "Improve cp110 clk support on Marvell
>> > > Armada 7K/8K".
>> > 
>> > That sounds messy.
>> > 
>> > > So for these particular patches, either I rebase them on the v4.12-rc2
>> > > and there will be a small merge conflict during the merge window for
>> > > v4.13, or we can ask a stable branch with only these few patches (I am
>> > > adding the clock maintainer to this email).
>> > >
>> > > If we chose this last option I can split the clock patches to have patch
>> > > modifying only the binding documentation.
>> > 
>> > I think you can make a patch just modifying the binding documentation
>> > and then apply that patch to *both* trees, just make sure the patch
>> > is *final* and not applied in different versions in clk and pinctrl.
>> 
>> I thought we try to avoid doing that.
>> 
>> > I think cross-tree branches for documentation clashes is too much
>> > bureaucracy.
>> 
>> I can just take all the doc patches separately. Or you can take the 
>> clock one too.
>
> Stephen and I have started making a -dt branch for each new clk driver
> which. This stable branch has only the dt bindings/headers in it (no
> driver code).
>
> I'll make such a branch for ap806 this week and everyone can merge that
> in as a dep.

So please use the version 2 I've just submitted. I split each patch to
allow you to have a dt binding only branch. See
http://lists.infradead.org/pipermail/linux-arm-kernel/2017-May/509832.html

I did the same for the cp110:
http://lists.infradead.org/pipermail/linux-arm-kernel/2017-May/509816.html

Gregory

>
> Regards,
> Mike
>
>> 
>> > Make sure your clock patch is finalized and preferably also applied
>> > to the clk tree then put it in the bottom of the patch set you send
>> > to me as well and I will proceed like above.
>> > 
>> > Yours,
>> > Linus Walleij

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com