# Re: \[PATCH\] pwm-backlight: add regulator and GPIO support

- From: Mark Brown \<hidden\>
- Date: 2012-07-04 15:24:58 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2012/07/3888681
- Thread: https://ratatoskr.run/linux-tegra/2012/06/3886638/t.md

```text
On Thu, Jul 05, 2012 at 12:14:39AM +0900, Alex Courbot wrote:
> On Wed 04 Jul 2012 10:00:56 PM JST, Sascha Hauer wrote:

> >Also please be aware that using a regulator in the pwm backlight will
> >instantly break all existing users. That's hardly your fault though.

> Sorry, I don't see why. Could you elaborate on this?

All existing machines will start failing during probe as they won't be
able to find the regulator - you should ideally make sure everyone in
mainline gets an appropriate regulator set up.
```