Re: [PATCH 2/2] drivers/gpio/gpio-adp5588.c: switch to events system

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Tue, Feb 5, 2019 at 4:17 PM Nikolaus Voss <nv@xxxxxxx> wrote:

> Interupts were generated using GPIN interrupts of
> ADP5588. These interrupts have two important limitations:
> 1. Interrupts can only be generated for either rising or
>    falling edges but not both.
> 2. Interrupts are reasserted as long as the interrupt condition
>    persists (i.e. high or low level on that GPIN). This generates
>    lots of interrupts unless the event is very short.
>
> To overcome this, ADP5588 provides an event system which queues
> up to 10 events in a buffer. GPIN events are queued whenever the
> GPIN is asserted or deasserted. This makes it possible to support
> generating GPIN interrupts for both edges and to generate only one
> interrupt per state change.
> Thus it is possible to chain the gpio-keys driver for some GPIOs.
>
> Signed-off-by: Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx>

Patch applied with Michael's ACK.

Yours,
Linus Walleij