function keys

function keys

[Franklin Marmon]

I am currently using an acpi driver for sony laptops (sony_acpi.c) which 
provides an interface for reading that last pressed function key by means of 
a /proc interface file. When read this file will show either 0 or the last 
function key combination that was typed. It provides this value by using the 
acpi_evaluate_object() function to obtain the value of "GHKE". A user space 
program is currently used to read this value every N seconds and check for 
events.

Is there an interrupt generated when one of these function keys is pressed and 
is this interrupt currently handled by the acpi subsystem? If so, is there a 
way to add this acpi device driver into a wait queue for this type of event 
so that a proper char device may be created and polled, rather than reading 
the /proc file system every N seconds?

Is there a better way to handle this type of thing in the kernel already that 
I've missed?

Thank you,

frm

--
Franklin Marmon
freenode nic: Agathezol

Re: function keys

[Garry Williams]

On Wed, 2006-03-15 at 22:56 -0700, Franklin Marmon wrote:
> I am currently using an acpi driver for sony laptops (sony_acpi.c) which 
> provides an interface for reading that last pressed function key by means of 
> a /proc interface file. When read this file will show either 0 or the last 
> function key combination that was typed. It provides this value by using the 
> acpi_evaluate_object() function to obtain the value of "GHKE". A user space 
> program is currently used to read this value every N seconds and check for 
> events.
> 
> Is there an interrupt generated when one of these function keys is pressed and 
> is this interrupt currently handled by the acpi subsystem? If so, is there a 
> way to add this acpi device driver into a wait queue for this type of event 
> so that a proper char device may be created and polled, rather than reading 
> the /proc file system every N seconds?

 http://developer.berlios.de/projects/fsfn/ 

-- 
Garry Williams -- +1 (678) 656-4579