Re: RFC: gpio attachment for ppbus

[Hans Rosenfeld <rosenfeld%grumpf.hope-2000.org@localhost>]

On Tue, Apr 29, 2008 at 11:47:08AM +0200, Quentin Garnier wrote:
> > For some future extension of the gpio driver, I thought about adding an
> > ioctl() to specify a sequence of operations to perform, complete with
> > timing information. The actual operations would still be carried out
> > sequentially by the gpio driver, but you wouldn't need an ioctl() for
> > every read or write of a pin. But this still needs some more thought.
> 
> I think that belongs to a userspace lib, anyway.

That would miss the point of reducing the number of syscalls needed to
perform a large number of gpio operations. But maybe this issue is not
important enough to justify such a huge extension.


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