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

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Message-Id: <200906040215.48264.david-b@pacbell.net>
Date:	Thu, 4 Jun 2009 02:15:48 -0700
From:	David Brownell <david-b@...bell.net>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpio sysfs: add a "toggle" value

On Thursday 04 June 2009, Mike Frysinger wrote:
> the point was to lower the number of user<->kernel transitions.  yes,
> all of this stuff can of course be done in the shell, but it's hard to
> push limits when the interface is tying your hands and sitting on your
> back.

So what's the application that needs to do all this in
userspace yet which can't hook up a quick kernel driver?

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 ...




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