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authorNikolaus Voss <nv@vosn.de>2019-02-05 14:31:11 +0100
committerLinus Walleij <linus.walleij@linaro.org>2019-02-09 11:33:37 +0100
commit5d643edad73e839575f854c68782eecdfaf34c1e (patch)
treea863986d1acb798d1e72975d48144ed8065bef6c /drivers/spmi
parent9f22af1167815ce10909529412de33122be44758 (diff)
downloadlinux-5d643edad73e839575f854c68782eecdfaf34c1e.tar.bz2
gpio: adp5588.c: Switch to events system
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@loewensteinmedical.de> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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