Re: [patch/rfc 2.6.19-rc5] arch-neutral GPIO calls

pHilipp Zabel
2006-11-30T06:57:54Z

Hi,

On 11/23/06, David Brownell <david-b@pacbell.net> wrote:
> On Tuesday 21 November 2006 7:57 am, Bill Gatliff wrote:
>
> > Once you're hiding the GPIO number behind an enumeration, you can create
> > a bitmap with more information than a single integer. That extra
> > information could be used--- in my implementations, if any ever come
> > about--- to store routing information.
>
> But none of the existing GPIO users do that. The goal wasn't to define
> a new notion of GPIO; it was collecting the existing ones under a single
> arch-neutral umbrella.
>
>
> > >It'd also be a big (and needless) disruption to code that's been working
> > >fine for several years now ...
> >
> > ... all of which is using the current GPIO API, you mean? :)
>
> Effectively, yes. I counted quite a few implementations in the current
> tree which can trivially (#defines) map to that API.

I tried to do that for pxa, the patch is attached.
So what is the state of this discussion, now that 2.6.19 is here?

I just submitted an input driver for GPIO buttons to linux-input that
we use in the handhelds.org kernel for sa1100, pxa and s3c2410 archs.
It needs some ugly
#ifdefs currently, but with common GPIO calls they all could go away.

regards
Philipp