Messages in this thread | | | Date | Mon, 18 Apr 2011 23:31:08 +0100 | From | Mark Brown <> | Subject | Re: [PATCH 1/2] gpio: add pin biasing and drive mode to gpiolib |
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On Tue, Apr 19, 2011 at 08:16:12AM +1000, Ben Nizette wrote: > On 18/04/2011, at 9:59 PM, Mark Brown wrote:
> > Even if it ends up being the board code using these APIs it seems > > sensible to have a standard API that GPIO drivers can use to expose the > > functionality. This will help with getting control into code Linux owns > > (since people don't have to implement custom APIs) and will mean we can > > do things like add control of this for device tree based boards.
> Oh I'm all for platform-specific libraries abstracting this away from the > board code if that helps, that's certainly the way that, eg, AVR32 does it. > It just doesn't make sense to me to bounce from the board code in to > 'generic' gpio code then back to platform-specific implementations when > you could cut out the middle man.
We have cross platform abstractions for lots of things - device tree, which I mentioned, is the obvious example - and many of the GPIO controllers are themselves cross platform as they're for off-SoC chips.
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