Re: [PATCH v2 1/1] Input: gpio_keys - add device tree support for interrupt only keys

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On Wednesday 12 November 2014 20:16:06, Arnd Bergmann wrote:
> On Wednesday 12 November 2014 17:38:31 Alexander Stein wrote:
> > On Wednesday 12 November 2014 17:04:57, Arnd Bergmann wrote:
> > > On Wednesday 12 November 2014 17:02:56 Alexander Stein wrote:
> > > > This features already exists for board config setups. Add support for
> > > > device tree based systems.
> > > > 
> > > > Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxxxxxxxx>
> > > > ---
> > > > Please note: Due to current lack of hardware I could not test it yet. V2
> > > > includes the changes proposed by Dmitry.
> > > > 
> > > > Changes in v2:
> > > > * Added device tree bindings
> > > > * IRQ is only parsed and mapped when there is no "gpios" property
> > > > 
> > > 
> > > Can you list one or more examples in the patch description?
> > > Are these systems that don't expose the GPIO controller with a
> > > standalone driver, or systems that really actually connect the
> > > buttons to an interrupt pin?
> > 
> > You mean a use case? I came to this situation to test interrupt polarity on a microcontroller, thus a simple /IRQ pin, no GPIO at all. So in the end I have an input just connected to an interrupt line.
> > I noticed gpio_keys using platform data only can be used for this setup. So I added this support for device tree.
> > 
> 
> I meant a specific board file that uses this, which can't be converted
> to DT without your change.

I've searched (hopefully) the complete arch/ tree on v3.18-rc4 for struct gpio_keys_button and checked each occurrence. I didn't found any usage of IRQ based input keys.

Best regards,
Alexander

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