# Re: \[PATCHv9 1/3\] Runtime Interpreted Power Sequences

- From: Mark Brown \<hidden\>
- Date: 2012-11-27 16:46:14 
- List: linux-devicetree
- Page: https://ratatoskr.run/linux-devicetree/2012/11/3964000
- Thread: https://ratatoskr.run/linux-tegra/2012/11/3958744/t.md

```text
On Tue, Nov 27, 2012 at 04:37:32PM +0100, Laurent Pinchart wrote:

> One possibly crazy idea I had was to replace backlight devices as we know them 
> with LED devices (a LED driver IC shouldn't be supported by different APIs 
> depending on whether the LEDs it drives are used as a backlight or not), and 
> have the panel hook up with the associated LED device to expose backlight 
> operations through the CDF. Panels with a backlight controller tied to the 
> panel controller (control through DSI for instance) would implement the 
> backlight operations directly without instantiating a LED device. This still 
> leaves the question of the userspace backlight brightness API open.

I remember looking at that before but never actually got round to it, it
seems like a sensible idea to me.
```

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