DT GPIO numbering?
Linus Walleij
linus.walleij at linaro.org
Tue Aug 14 20:00:23 EST 2012
On Fri, Aug 10, 2012 at 11:34 AM, Johannes Stezenbach <js at sig21.net> wrote:
> Actually I think the kernel internal GPIO numbers shouldn't be in the
> sysfs API, instead userspace should use the names.
This is true, but we cannot remove these numbers because they
are now in Documentation/ABI/testing/sysfs-gpio
And while the "testing" ABI is, well for testing, it would probably
break a lot of stuff it we removed it.
But we can sure add names. However these would still sit under
/sys/class/gpio/gpioN/name
Or do you suggest we simply duplicate all GPIOs which have
names under /sys/class/gpio/named/<name>
or something like that?
I know Grant may have opinions on this...
> Probably it's
> best to not use /sys/class/gpio/export but instead let the board
> init code export the GPIOs available to userspace with proper names.
This sounds true.
Yours,
Linus Walleij
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