* Uwe Kleine-K?nig [off-list ref] [160614 12:03]:

Traditionally the n-th gpio device probed by the omap gpio driver got
the gpio number range [n*32 .. n*32+31].
When order of the devices probed by the driver changes (which can happen
already now when some devices have a pinctrl and so the first probe
attempt returns -ENODEV) the numbering changes.

To ensure a deterministical numbering use of_alias_get_id to determine
the base for a given device. If no respective alias exists fall back to
the traditional numbering.

For the unusual case where only a part of the gpio devices have a
matching alias some of them might fail to probe. But if none of them has
an alias or all, there is no conflict which should be good enough to
maintain backward compatibility.

I think doing this is a good idea to prevent nasty suprises when
upgrading a kernel on some device:

Acked-by: Tony Lindgren <tony@atomide.com>