Messages in this thread | | | Date | Mon, 6 Aug 2012 08:35:51 +0200 | Subject | Re: DT GPIO numbering? | From | Linus Walleij <> |
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On Mon, Aug 6, 2012 at 4:18 AM, Stephen Warren <swarren@wwwdotorg.org> wrote:
> I can't comment on the sysfs-vs-dev interface location, but I don't > think it addresses Johannes' issue; finding out which GPIO IDs are > provided by which devices. > > Perhaps in each device's sysfs node, there should be some information > re: which GPIO range it provides. Right now, perhaps a text file with > the GPIO base it it.
Yes that could work ...
> With the new /dev interface you mention above, > perhaps a symlink to the /dev file, or a file containing the /dev file's > major/minor number. Or, is there such a thing already (other than > debugfs's gpio file).
Nothing I know of, but yes the day we come up with something, it needs to be backward-compatible some way.
The problem is that there is really no reference userspace like "lsgpio" or so. Maybe the first step could be to create that.
Yours, Linus Walleij
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