Re: [PATCH v5 3/3] platform/chrome: Standardize Chrome OS keyboard backlight name

Pavel Machek
2019-04-04T20:06:59Z

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Hi!

> > > It is *function* and maybe color that userspace is interested in, and
> > > here we have proper standardization in form of "kbd_backlight". Device
> > > name is, well, device name. It should uniquely identify the device led
> > > is attached to, but otherwise is rarely interesting. If userspace is
> > > really concerned what kind of keyboard backlight it is it should
> > > investigate parent device(s) and see what they end up with.
> >
> > That does not work. Userspace wants to know if it is internal keyboard
> > or USB keyboard, not what kind of i2c controller the LED is connected
> > to.
>
> Why does userspace want to know it?

For example to turn off backlight on internal keyboard when the lid is closed.

> > grep for platform::mic_mute .
> >
> > (And platform is even pretty good match for how the LED is connected
> > in your case).
>
> Until we get a secondary interface that is also "platform"...

How would that happen?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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