linux-kernel - Re: [PATCH v2 1/2] gpio: tps65219: add GPIO support for TPS65219 PMIC

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Message-ID: <CAHp75Vf0hW6sMXeGSVXRVoW1mxFufWmbJNzt7_10xPj_k5SNkA@mail.gmail.com>
Date:   Mon, 22 May 2023 14:18:50 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     jerome Neanne <jneanne@...libre.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tony Lindgren <tony@...mide.com>, Lee Jones <lee@...nel.org>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-omap@...r.kernel.org,
        Jonathan Cormier <jcormier@...ticallink.com>
Subject: Re: [PATCH v2 1/2] gpio: tps65219: add GPIO support for TPS65219 PMIC

On Mon, May 22, 2023 at 10:47 AM jerome Neanne <jneanne@...libre.com> wrote:
> On 20/05/2023 11:44, andy.shevchenko@...il.com wrote:
> > Mon, May 15, 2023 at 05:36:46PM +0200, Bartosz Golaszewski kirjoitti:
> >> On Thu, May 11, 2023 at 4:09 PM Jerome Neanne <jneanne@...libre.com> wrote:

...

> >>> +       gpio->gpio_chip = tps65219_gpio_chip;
> >>
> >> Aren't you getting any warnings here about dropping the 'const' from
> >> the global structure?
> >
> > But this is a copy of the contents and not the simple pointer.

I commented on Bart's question.

> In many other places where this is done, the struct is declared like:
>
> static const struct gpio_chip template_chip = {
>
> After internal review, I changed this to:
>
> static const struct gpio_chip tps65219_gpio_chip = {
>
> This is because I didn't want to have this "template" that sounds to me
> like "dummy". Maybe I misunderstood and this "template" was used on
> purpose because this const struct is just copied once to initialize
> tps65219_gpio->gpio_chip during probe.
>
> Introducing tps65219_gpio_chip name is maybe confusing with
> tps65219_gpio struct.
>
> I think the const should not be a problem here but the naming I used
> might be misleading. If you have a suggestion of what is a good practice
> to make this piece of code clearer. I'll follow your suggestion (use
> template? more_explicit name like ???).

It's up to Bart.

-- 
With Best Regards,
Andy Shevchenko