From mboxrd@z Thu Jan  1 00:00:00 1970
From: richard@nod.at (Richard Weinberger)
Date: Mon, 27 Jan 2014 07:51:08 +0100
Subject: Handling interrupts in spidev
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Am 27.01.2014 06:37, schrieb Amit Mahadik:
> Thanks for the reply Richard.
>         The interrupt is not a GPIO  pin. I have read something about UIO (userspace I/O).
> Also, I want the operation to be asynchronous. Any pointer to such mechanism will be very helpful.

Using UIO you can also catch an interrupt in userspace.
You can have a read() which blocks till data is available.

Thanks,
//richard