linux-kernel - Re: [PATCH 0/3] gpiolib: convert 'devprop_gpiochip_set_names' to support multiple gpiochip per device

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Message-ID: <CAMhs-H9fbHMxxSaqMj=nyACAN6aDB-bYK1nF1dRh8a1krTdaZg@mail.gmail.com>
Date:   Tue, 27 Jul 2021 08:02:01 +0200
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Gregory Fong <gregory.0xf0@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        René van Dorst <opensource@...rst.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        John Thomson <git@...nthomson.fastmail.com.au>,
        NeilBrown <neil@...wn.name>,
        Nicholas Mc Guire <hofrat@...dl.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/3] gpiolib: convert 'devprop_gpiochip_set_names' to
 support multiple gpiochip per device

On Thu, Jul 8, 2021 at 9:04 AM Sergio Paracuellos
<sergio.paracuellos@...il.com> wrote:
>
> There are some unfortunate cases where the DT representation
> of the device and the Linux internal representation differs.
> Such drivers for devices are forced to implement a custom function
> to avoid the core code 'devprop_gpiochip_set_names' to be executed
> since in any other case every gpiochip inside will got repeated
> names through its internal gpiochip banks. To avoid this antipattern
> this changes are introduced trying to adapt core 'devprop_gpiochip_set_names'
> to get a correct behaviour for every single situation.
>
> This series introduces a new 'offset' field in the gpiochip structure
> that can be used for those unfortunate drivers that must define multiple
> gpiochips per device.
>
> Drivers affected by this situation are also updated. These are
> 'gpio-mt7621' and 'gpio-brcmstb'.
>
> Motivation for this series available at [0].
>
> Thanks in advance for your feedback.
>
> Best regards,
>     Sergio Paracuellos
>
> [0]: https://lkml.org/lkml/2021/6/26/198
>
> Sergio Paracuellos (3):
>   gpiolib: convert 'devprop_gpiochip_set_names' to support multiple
>     gpiochip baks per device
>   gpio: mt7621: support gpio-line-names property
>   gpio: brcmstb: remove custom 'brcmstb_gpio_set_names'
>
>  drivers/gpio/gpio-brcmstb.c | 45 +------------------------------------
>  drivers/gpio/gpio-mt7621.c  |  1 +
>  drivers/gpio/gpiolib.c      | 34 +++++++++++++++++++++++-----
>  include/linux/gpio/driver.h |  4 ++++
>  4 files changed, 34 insertions(+), 50 deletions(-)

Hi!

Linus, Bartosz, any comments on this series?

Best regards,
    Sergio Paracuellos
>
> --
> 2.25.1
>