On Thu, Sep 19, 2013 at 11:28:50AM -0700, Guenter Roeck wrote: > On Thu, Sep 19, 2013 at 05:42:45PM +0100, Mark Brown wrote: > > Many of the things described only have passive components attached, or > > things that otherwise don't need drivers - things like power inputs or > > headphone connectors, they're mainly providing information to allow > > userspace to behave differently (eg, display a charging indicator in the > > UI). It's not 100% true but by and by large if detection is being done > > using a GPIO it's probably something like that. > Correct. However, gpio based 'detect' pins typically need debounce support > which is not directly available through the gpio userspace API. I tried to add > that earlier, but was told to use extcon instead as it provides the necessary > infrastructure. Now it almost looks like I can not use it either because the > required devicetree bindings may be considered unacceptable. Yes, I'm trying to explain to Mark why there are drivers just purely for the connector without any software for the connected device.
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