Re: generic hotkey driver

[John Belmonte <john-wanGne27zNesTnJN9+BGXg@public.gmane.org>]

Yu, Luming wrote:
>>> a. Configure interface:
>>>	1. register mapping of event number to internal hotkey number.
>>>	2. register expected acpi_handle which is needed to install
>>>notify handler, which will generate event for acpid.
>>>	3. register the AML methods that should be executed , with
>>>respect to  the hotkey get pressed.
>>
>>As far as I know, there is no hotkey event available in 
>>Toshiba's case. 
>> The only way to monitor the keys is by polling.
> 
> Hmm. It's not efficient way for hotkey.
> I'm curious what's the polling frequency.

I don't poll within the kernel-- I leave that issue to userspace.  The 
hotkeys are queued, and I've found a period of .2s to be more than adequate.

> I guess I can slightly modify the configure interface to
> add a polling register interface.  To keep other parts of
> interfaces unchanged, just need to generate corresponding
> pseudo event for each active event found by polling.
> 
> Does it make sense?

If you want to provide hotkey events to userspace, I guess there is no 
other choice.

-John


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