Re: How ?

In message [ref] you wrote:

Don't know why you want to handle it from user space, but the easiest way
to notify an application would be to send a signal. Have a special ioctl()
to notify the driver that this application wants a signal, and then when
the driver receives the interrupt it clears the condition and sends a
signal to the registered application(s).

Instead of inventing new special ioctl()'s it's  probably  better  to
use existing and standardized interfaces like select() resp. poll().

Best regards,

Wolfgang Denk

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Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
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