Ian Lepore 63cdf42e8c Add userland access to at91 gpio functionality via ioctl calls. Also,
add the ability for userland to be notified of changes on gpio pins via
a select(2)/read(2) interface.

Change the interrupt handler from filtered to threaded.

Because of the uiomove() calls in the new interface, change locking from
standard mutex to sx.

Add / restore the at91_gpio_high_z() function.

Reviewed by:	imp (long ago)
2013-03-29 19:52:57 +00:00
..
2013-03-29 11:53:20 +00:00
2013-03-21 23:02:19 +00:00
2012-11-01 04:07:08 +00:00
2013-02-21 12:52:18 +00:00
2013-02-28 13:46:03 +00:00