linux-kernel - Re: [PATCH v6 4/9] gpio: aggregator: introduce basic configfs interface

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Message-ID: <CAMRc=McpqUsEsMSfwo+WrzWdaW6YnMbptpj3fAoS-JfVhSm9mQ@mail.gmail.com>
Date: Fri, 21 Mar 2025 12:18:02 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Koichiro Den <koichiro.den@...onical.com>
Cc: linux-gpio@...r.kernel.org, geert+renesas@...der.be, 
	linus.walleij@...aro.org, maciej.borzecki@...onical.com, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 4/9] gpio: aggregator: introduce basic configfs interface

On Fri, Mar 21, 2025 at 3:35 AM Koichiro Den <koichiro.den@...onical.com> wrote:
>
> On Thu, Mar 20, 2025 at 04:54:26PM GMT, Bartosz Golaszewski wrote:
> > On Sat, Mar 15, 2025 at 5:41 PM Koichiro Den <koichiro.den@...onical.com> wrote:
> > >
> > > ---(snip)---
> > >
> > > Signed-off-by: Koichiro Den <koichiro.den@...onical.com>
> > > ---
> > >
> > > @@ -90,6 +124,70 @@ static int aggr_add_gpio(struct gpio_aggregator *aggr, const char *key,
> > >         return 0;
> > >  }
> > >
> > > +static bool aggr_is_active(struct gpio_aggregator *aggr)
> >
> > Series-wide: I would prefer a different prefix: why not
> > gpio_aggregator or at least gpio_aggr?
>
> Actually, that naming was intentional, but perhaps I could say this is just my
> personal preference. Here is a breakdown of the function name prefixes:
>
>   Before this patch series:
>   * forwarder:        gpiochip_fwd_* + gpio_fwd_*
>   * sysfs interface:  new_device/delete_device + aggr_*
>   * platform device:  gpio_aggregator_*
>   * module init/exit: gpio_aggregator_*

Yeah, it could use some more consistency. First: there's ongoing
work[1] on moving the forwarder code into its own library which is a
chance to change its prefix to gpio_forwarder_. You could add a patch
renaming the sysfs interfaces while sending v7.

>
>   After this patch series:
>   * common utils:     aggr_*

I'd prefer to keep gpio_aggregator_ here...

>   * forwarder:        gpiochip_fwd_* + gpio_fwd_*  <-- _Unchanged_
>   * configfs:         gpio_aggr_*

and here.

>   * sysfs interface:  new_device/delete_device     <-- _Unchanged_
>   * platform device:  gpio_aggregator_*            <-- _Unchanged_
>   * module init/exit: gpio_aggregator_*            <-- _Unchanged_
>

Bartosz

[1] https://lore.kernel.org/all/20250317-aaeon-up-board-pinctrl-support-v2-0-36126e30aa62@bootlin.com/