Re: [PATCH 0/4] Add a generic driver for LED-based backlight

Pavel Machek
2019-07-05T10:14:44Z

On Mon 2019-07-01 17:14:19, Jean-Jacques Hiblot wrote:
> This series aims to add a led-backlight driver, similar to pwm-backlight,
> but using a LED class device underneath.
>
> A few years ago (2015), Tomi Valkeinen posted a series implementing a
> backlight driver on top of a LED device:
> https://patchwork.kernel.org/patch/7293991/
> https://patchwork.kernel.org/patch/7294001/
> https://patchwork.kernel.org/patch/7293981/
>
> The discussion stopped because Tomi lacked the time to work on it.
>
> This series takes it from there and implements the binding that was
> discussed in https://patchwork.kernel.org/patch/7293991/. In this new
> binding the backlight device is a child of the LED controller instead of
> being another platform device that uses a phandle to reference a LED.

Other option would be to have backlight trigger. What are
advantages/disadvantages relative to that?
Pavel

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