This interrupt controller is found in the Actions Semi Owl SoCs (S500,
S700 and S900) and provides support for handling up to 3 external
interrupt lines.
Each line can be independently configured as interrupt and triggers on
either of the edges or either of the levels. Additionally, each line
can also be masked individually.
The patch is based on the work started by Parthiban Nallathambi:
https://lore.kernel.org/lkml/20181126100356.2840578-1-pn@xxxxxxx/
Signed-off-by: Parthiban Nallathambi <pn@xxxxxxx>
Signed-off-by: Saravanan Sekar <sravanhome@xxxxxxxxx>
[cristi: optimized DT, various fixes/cleanups/improvements]
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxx>