[PATCH 2/7] pinctrl: pinconf-generic: Infer map type from DT property

Sören Brinkmann soren.brinkmann at xilinx.com
Wed Nov 5 10:09:35 PST 2014

On Wed, 2014-11-05 at 03:56PM +0200, Laurent Pinchart wrote:
> Hi Soren,
> Thank you for the patch.
> On Monday 03 November 2014 11:05:26 Soren Brinkmann wrote:
> > With the new 'groups' property, the DT parser can infer the map type
> > from the fact whether 'pins' or 'groups' is used to specify the pin
> > group to work on.
> > To maintain backwards compatibitliy with current usage of the DT
> > binding, this is only done when an invalid map type is passed to the
> > parsing function.
> The Renesas PFC implements similar bindings with using the vendor-specific 
> properties "renesas,pins" and "renesas,groups" (bindings and implementation 
> available at Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt 
> and drivers/pinctrl/sh-pfc/pinctrl.c respectively).
> The Renesas implementation is a bit more generic in that it allows both pins 
> and groups to be specified in a single subnode. Do you think that feature 
> would make sense for pinconf-generic as well ?

I don't have a use-case for that. I guess if somebody needs this kind of
functionality it could be added later. I would like to avoid blocking
pinctrl-zynq on adding more features here.


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