Hi Bartosz,
On Tue, 20 Feb 2024 16:30:11 +0100
Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> On Tue, Feb 20, 2024 at 3:53 PM Herve Codina <herve.codina@xxxxxxxxxxx> wrote:
> >
> > On Tue, 20 Feb 2024 15:19:57 +0100
> > Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> >
> > > On Tue, Feb 20, 2024 at 2:39 PM Herve Codina <herve.codina@xxxxxxxxxxx> 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,
> > > > Hervé 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?
> >
> > / {
> > leds-dock {
> > compatible = "gpio-leds";
> >
> > led-5 {
> > label = "dock:alarm:red";
> > gpios = <&tca6424_dock_2 12 GPIO_ACTIVE_HIGH>;
> > };
>
> Do I understand correctly that the devlink is created between "led-5"
> and "tca6424_dock_2" but actually should also be created between
> "leds-dock" and "tca6424_dock_2"?
>
Yes, that's my understanding too.
Best regards,
Hervé
