linux-kernel - Re: [PATCH v2 06/10] gpio: provide gpiod_is

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Message-ID: <CAMRc=McySdUtj4foEf5a2db8jUEa=CnPmVVms2nwHoO2UYChSg@mail.gmail.com>
Date: Wed, 12 Nov 2025 09:06:13 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Kees Cook <kees@...nel.org>, Mika Westerberg <westeri@...nel.org>, 
	Dmitry Torokhov <dmitry.torokhov@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Saravana Kannan <saravanak@...gle.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Andy Shevchenko <andy@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Srinivas Kandagatla <srini@...nel.org>, Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, linux-hardening@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-sound@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v2 06/10] gpio: provide gpiod_is_shared()

On Tue, Nov 11, 2025 at 11:44 AM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> On Wed, Oct 22, 2025 at 3:11 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
>
> > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> >
> > Provide an interface allowing consumers to check if a GPIO descriptor
> > represents a GPIO that can potentially be shared by multiple consumers
> > at the same time. This is exposed to allow subsystems that already
> > work around the limitations of the current non-exclusive GPIO handling
> > in some ways, to gradually convert to relying on the new shared GPIO
> > feature of GPIOLIB.
> >
> > Extend the gpiolib-shared module to mark the GPIO shared proxy
> > descriptors with a flag checked by the new interface.
> >
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
>

I think you wanted to leave this under v3?

Bart