On Wed, May 13, 2015 at 4:25 AM, Feng Kan [off-list ref] wrote:

Marc:

Sorry for top posting. It seems with GIC-400, the get_irqstate is not a reliable
way of accessing the GPIO status. In our case, the gpio interrupt status can
only be read correctly with the SPISR register. So it seems we have to go
back to the old way of mapping the SPISR portion of the GIC in our GPIO
driver. We wanted to ask you if that is acceptable since SPISR in not
standard in all GIC, perhaps we can treat it differently.

As GPIO maintainer I am curious about what this is...

Can you describe the scenario where your GPIO (!) driver needs
to be poking around in the GIC SPISR?

Yours,
Linus Walleij