Re: [PATCH] backlight: led_bl: Add support for an "enable" GPIO

LABBE Corentin
2021-11-02T21:42:22Z

Le Tue, Nov 02, 2021 at 11:25:14AM +0000, Daniel Thompson a écrit :
> On Tue, Nov 02, 2021 at 11:19:42AM +0000, Daniel Thompson wrote:
> > On Tue, Nov 02, 2021 at 10:04:55AM +0000, Corentin LABBE wrote:
> > > From: Jean-Jacques Hiblot <jjhiblot@ti.com>
> > >
> > > This patch adds support for an "enable GPIO".
> >
> > Before taking this kind of change is there a good reason why backlight
> > should manage the GPIO? I thought that the LED subsystem was a sub
> > system for LEDs (not LED controllers). In other words if you direct
> > that the LED be lit up then isn't it the LED driver's job to manage
> > the GPIO and ensure that it lights up?
>
> Sorry... I should have paid more attention to my sense of déjà vu with
> this patch.
>
> This approach was discussed and rejected when we first introduced the
> led_bl driver:
> https://lore.kernel.org/linux-leds/20190705100851.zn2jkipj4fxq5we6@devuan/
>

Hello

I am sorry, I didnt checked if the patch was already submitted or not.

Regards