INTR_POLARITY_BOTH_EDGES?

[Andriy Gapon]

What do you think about adding this to intr_polarity ?
I think that it's useful for two reasons:
- support for GPIO interrupts of that kind (GPIO_INTR_EDGE_BOTH)
- symmetry with ACPI's ACPI_ACTIVE_BOTH (which probably exists for GPIO as well)
This new polarity is to be valid only with INTR_TRIGGER_EDGE as the name (and
sanity) implies.

By the way, the name is a open for bikeshedding.
-- 
Andriy Gapon