linux-kernel - Re: [PATCH v6 5/8] gpiolib: Introduce gpiod_set

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Date:   Fri, 27 Mar 2020 22:37:22 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Jonathan Corbet <corbet@....net>,
        Harish Jenny K N <harish_kandiga@...tor.com>,
        Eugeniu Rosca <erosca@...adit-jv.com>,
        Alexander Graf <graf@...zon.com>,
        Peter Maydell <peter.maydell@...aro.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Phil Reid <preid@...ctromag.com.au>,
        Marc Zyngier <marc.zyngier@....com>,
        Christoffer Dall <christoffer.dall@....com>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        QEMU Developers <qemu-devel@...gnu.org>
Subject: Re: [PATCH v6 5/8] gpiolib: Introduce gpiod_set_config()

On Tue, Mar 24, 2020 at 2:57 PM Geert Uytterhoeven
<geert+renesas@...der.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@...der.be>
> ---
> v6:
>   - New.

Patch applied in preparation for the next kernel cycle
so we get Geert's patch stack down.

Yours,
Linus Walleij