[PATCH] drivers: create a pin control subsystem v8

Grant Likely grant.likely at secretlab.ca
Tue Oct 4 16:35:20 EDT 2011

On Sat, Oct 01, 2011 at 12:39:21PM +0200, Linus Walleij wrote:
> 2011/9/30 Grant Likely <grant.likely at secretlab.ca>:
> > I'm not convinced that the sysfs approach is
> > actually the right interface here (I'm certainly not a fan of the gpio
> > sysfs i/f), and I'd rather not be putting in unneeded stuff until the
> > userspace i/f is hammered out.
> Actually, thinking about it I cannot see what would be wrong
> with /dev/gpio0 & friends in the first place.
> Using sysfs as swiss army knife for custom I/O does not
> seem like it would be long-term viable so thanks for this
> observation, and I think we need /dev/gpio* put on some
> mental roadmap somewhere.

Agreed.  I don't want to be in the situation we are now with GPIO,
where every time I look at the sysfs interface I shudder.


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