Messages in this thread | | | From | David Brownell <> | Subject | Re: [patch/rfc 2.6.25-git] gpio: sysfs interface | Date | Tue, 29 Apr 2008 14:28:58 -0700 |
| |
On Monday 28 April 2008, Ben Nizette wrote: > > > > > > > > Sysfs attributes are supposed to be pollable. I've not done it, > > > > but fs/sysfs/file.c::sysfs_notify() looks relevant ... > > > > > > Right, that'll work. > > > > OK. In that case, I think I should plan to rename the "direction" > > attribute as "configuration" or something a bit broader ... so that > > writing "irq" (or maybe "rising", "falling", "bothedges", "poll") > > would eventually configure it as an input with an IRQ handler. > > Good plan, unless you'd prefer to see "direction" and "interrupt" config > separate. I have no real preference but IMO > echo "falling" > interrupt > makes more immediate sense than > echo "falling" > configuration
OK, I'll leave it be then. Given that not all GPIOs support interrupts, I used the "poll" example intentionally ... being able to poll every N seconds (milliseconds?) may be important.
> > > > Whenever someone contributes such an async notification scheme, > > that is. ;) > > ;)
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |