Re: [PATCH v6 5/8] gpiolib: Introduce gpiod_set_config()

From: Linus Walleij <linus.walleij@linaro.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Harish Jenny K N <harish_kandiga@mentor.com>,
	Eugeniu Rosca <erosca@de.adit-jv.com>,
	Alexander Graf <graf@amazon.com>,
	Peter Maydell <peter.maydell@linaro.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Phil Reid <preid@electromag.com.au>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Christoffer Dall <christoffer.dall@arm.com>,
	Magnus Damm <magnus.damm@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	Linux Doc Mailing List <linux-doc@vger.kernel.org>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH v6 5/8] gpiolib: Introduce gpiod_set_config()
Date: Fri, 27 Mar 2020 22:33:38 +0100	[thread overview]
Message-ID: <CACRpkdaG0Fd7rpfqO6p0j9RL3T-whCof=YewH=rR3Bwe89KeUA@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdVpiO+KGRTF=83kubuuJF2p8TJhWe_X32amSTa6bXsCxg@mail.gmail.com>

On Fri, Mar 27, 2020 at 9:45 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Thu, Mar 26, 2020 at 10:26 PM Linus Walleij <linus.walleij@linaro.org> wrote:
> > On Tue, Mar 24, 2020 at 2:57 PM Geert Uytterhoeven
> > <geert+renesas@glider.be> wrote:
> > > The GPIO Aggregator will need a method to forward a .set_config() call
> > > to its parent gpiochip.  This requires obtaining the gpio_chip and
> > > offset for a given gpio_desc.  While gpiod_to_chip() is public,
> > > gpio_chip_hwgpio() is not, so there is currently no method to obtain the
> > > needed GPIO offset parameter.
> > >
> > > Hence introduce a public gpiod_set_config() helper, which invokes the
> > > .set_config() callback through a gpio_desc pointer, like is done for
> > > most other gpio_chip callbacks.
> > >
> > > Rewrite the existing gpiod_set_debounce() helper as a wrapper around
> > > gpiod_set_config(), to avoid duplication.
> > >
> > > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > > ---
> > > v6:
> > >   - New.
> >
> > This is nice, I tried to actually just apply this (you also sent some
> > two cleanups that I tried to apply) byt Yue's cleanup patch
> > commit d18fddff061d2796525e6d4a958cb3d30aed8efd
> > "gpiolib: Remove duplicated function gpio_do_set_config()"
> > makes none of them apply :/
>
> /me confused.
>
> That commit was reverted later, so it shouldn't matter.
>
> I have just verified, and both my full series and just this single
> patch, do apply fine to all of current gpio/for-next, linus/master, and
> next-20200327.  They even apply fine to gpio/for-next before or after
> the two cleanups I sent, too.
>
> What am I missing?

Ah I see, it is because my development branch is based on
v5.6-rc1. So I have to merge in a later -rc where this revert
is applied so that this applies.

Yours,
Linus Walleij