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References: <20240220133950.138452-1-herve.codina@bootlin.com>
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From: Bartosz Golaszewski <brgl@bgdev.pl>
Date: Tue, 20 Feb 2024 15:19:57 +0100
Message-ID: <CAMRc=MfWPEOHeNvAwra-JxHZBFMrQbP+273zbFLDZfxi7fx8Yg@mail.gmail.com>
Subject: Re: [PATCH RESEND 0/2] leds: gpio: Add devlink between the leds-gpio
 device and the gpio used.
To: Herve Codina <herve.codina@bootlin.com>
Cc: Linus Walleij <linus.walleij@linaro.org>, Pavel Machek <pavel@ucw.cz>, Lee Jones <lee@kernel.org>, 
	Saravana Kannan <saravanak@google.com>, linux-gpio@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, 
	Luca Ceresoli <luca.ceresoli@bootlin.com>, Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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On Tue, Feb 20, 2024 at 2:39=E2=80=AFPM Herve Codina <herve.codina@bootlin.=
com> wrote:
>
> Hi,
>
> Note: Resent this series with Saravana added in Cc.
>
> When a gpio used by the leds-gpio device is removed, the leds-gpio
> device continues to use this gpio. Also, when the gpio is back, the
> leds-gpio still uses the old removed gpio.
>
> A consumer/supplier relationship is missing between the leds-gpio device
> (consumer) and the gpio used (supplier).
>
> This series adds an addionnal devlink between this two device.
> With this link when the gpio is removed, the leds-gpio device is also
> removed.
>
> Best regards,
> Herv=C3=A9 Codina
>
> Herve Codina (2):
>   gpiolib: Introduce gpiod_device_add_link()
>   leds: gpio: Add devlinks between the gpio consumed and the gpio leds
>     device
>
>  drivers/gpio/gpiolib.c        | 32 ++++++++++++++++++++++++++++++++
>  drivers/leds/leds-gpio.c      | 15 +++++++++++++++
>  include/linux/gpio/consumer.h |  5 +++++
>  3 files changed, 52 insertions(+)
>
> --
> 2.43.0
>

Can you add some more context here in the form of DT snippets that
lead to this being needed?

Bartosz