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    SubjectRe: [PATCH] gpio sysfs: add a "toggle" value
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    On Thu, Jun 4, 2009 at 05:48, David Brownell wrote:
    > 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?

    i had "simple-gpio" but it was rejected as it duplicated too much with
    the gpio sysfs interface

    does vectored writes (writve) work with sysfs ? if so, then that
    should work for back-to-back commands rather than having sysfs do
    stream parsing.
    -mike
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