linux-kernel - Re: [PATCH] pwm: Rename GPIO set_rv callback back to its original name

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Message-ID: <CAMuHMdUDy5ZtDBYkkVOWE4C=h3L85+R6HFzY1fYt51uDCG2-mg@mail.gmail.com>
Date: Tue, 12 Aug 2025 13:37:54 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Uwe Kleine-König <ukleinek@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>, 
	Stephen Rothwell <sfr@...b.auug.org.au>, linux-pwm@...r.kernel.org, 
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pwm: Rename GPIO set_rv callback back to its original name

Hi Uwe,

On Tue, 12 Aug 2025 at 12:44, Uwe Kleine-König <ukleinek@...nel.org> wrote:
> On Tue, Aug 12, 2025 at 10:14:59AM +0200, Geert Uytterhoeven wrote:
> > As of commit d9d87d90cc0b10cd ("treewide: rename GPIO set callbacks back
> > to their original names"), the .set_rv() callback no longer exists:
> >
> >     drivers/pwm/core.c: In function ‘__pwmchip_add’:
> >     drivers/pwm/core.c:2514:26: error: ‘struct gpio_chip’ has no member named ‘set_rv’
> >      2514 |                         .set_rv = pwm_gpio_set,
> >         |                          ^~~~~~
> >     drivers/pwm/core.c:2514:35: error: initialization of ‘int (*)(struct gpio_chip *, unsigned int)’ from incompatible pointer type ‘int (*)(struct gpio_chip *, unsigned int,  int)’ [-Werror=incompatible-pointer-types]
> >      2514 |                         .set_rv = pwm_gpio_set,
> >         |                                   ^~~~~~~~~~~~
> >     drivers/pwm/core.c:2514:35: note: (near initialization for ‘(anonymous).direction_input’)
> >
> > Fixes: 1c84bb7fc0ad5841 ("pwm: Provide a gpio device for waveform drivers")
> > Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> > ---
> > Probably to be folded into the original commit, when pwm/for-next is
> > rebased to v6.17-rc1.
>
> That's what I did, before seeing your patch. Note that the Fixes line
> isn't accurate, because it only gets wrong when it's merged in a tree
> that contains d9d87d90cc0b ("treewide: rename GPIO set callbacks back to
> their original names"). I don't know in which tree you found the two
> commits together (I think Stephen fixed it for next?), but then

I found it while preparing today's renesas-drivers release.

> technically the merge commit would be at fault.

Stephen indeed fixed it in today's linux-next release (which happened
after I encountered the issue), which is also the first linux-next release
that contains both commits.

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds