Re: [PATCH 1/2] irq/irq_sim: provide irq_sim_fire_edge()

From: Linus Walleij
Date: Fri Dec 14 2018 - 09:07:55 EST

On Wed, Dec 5, 2018 at 2:20 PM Uwe Kleine-KÃnig
<u.kleine-koenig@xxxxxxxxxxxxxx> wrote:
> On Wed, Dec 05, 2018 at 01:19:54PM +0100, Linus Walleij wrote:

> > > The iio testing driver only needs the trigger and relies on an irq that
> > > then calls the registerd handler. The iio driver doesn't need to tune
> > > the edge sensitivity though and if your mockup driver just only calls
> > > the fire routine if the configured sensitivity justifies that,
> > > everything should work as expected.
> >
> > Simulating edges in the generic IRQ simulator codes seems
> > generally useful to me, even if there is just one user now.
> I cannot imagine another potential user. Which kind of driver could use
> that that is not a gpio simulator?

I suppose anything that can generate an IRQ and wants to generate
some test IRQs where edge matters, drivers/irqchips/?

Regmap IRQ drivers/base/regmap/regmap-irq.c does support
edges, and regmap already expose all registers it handles in
debugfs, so it'd be really neat of you can also use debugfs
to insert IRQs from a device using regmap.

Linus Walleij