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From: David Brownell <david-b@pacbell.net>
To: Mike Frysinger <vapier.adi@gmail.com>
Subject: Re: [PATCH] gpio sysfs: add a "toggle" value
Date: Thu, 4 Jun 2009 02:48:07 -0700
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Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
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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?

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