Re: input question: ambient light sensor button

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On Sun, 15 Sep 2013, Pali Rohár wrote:

> I do not know where to ask this question, but I think that kernel 
> developers could help me.
> 
> I have notebook with one special button on keyboard which is 
> designed for turning ambient light sensor on and off. By default 
> pressing button do nothing (I can turn ambient light sensor on/off 
> via sysfs platform wmi module). Button press is reported by 
> kernel input device AT Translated Set 2 keyboard and reports it 
> as button "touchpad off".
> 
> Of course "touchpad off" is incorrect and I'd like to ask which 
> kernel key or button from /usr/include/linux/input.h should be 
> mapped for my ambient light sensor button? Is there already some? 
> And what is strategy for allocating KEY_* and BTN_* numbers?

This is maintained by Dmitry, so he's the one to answer this. I am adding 
him to CC.

> I'd like to know this, so udev could have correct DMI keymap 
> hooks and other userspace programs can understand ambient light 
> sensor button correctly.

-- 
Jiri Kosina
SUSE Labs
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