Re: [PATCH] gpio sysfs: add a "toggle" value

From: David Brownell
Date: Thu Jun 04 2009 - 05:54:30 EST


On Thursday 04 June 2009, Mike Frysinger wrote:
> > I don't like the idea of embedding any kind of interpreter
> > in the sysfs interface, but that's the direction you seem
> > to be heading ...
>
> i dont view the userspace GPIO interface as a simple "i want to wiggle
> pins for fun and testing".  i see it as a dynamic method for building
> userspace drivers for simple devices.

I don't. I see it as an adjunct to real drivers. Or maybe
we just differ on what "simple" means here.


> as such, having a very simple
> "command language" for optimizing the interaction provides a pretty
> good trade off between kernel complexity and lowering overhead imo.

If that's what you want, why don't you write a custom driver
that provides the kind of command interpreter you want?

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/