On Mon, Nov 3, 2014 at 8:05 PM, Soren Brinkmann
[off-list ref] 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.

So that is this:

+               if (type == PIN_MAP_TYPE_INVALID)
+                       type = PIN_MAP_TYPE_CONFIGS_GROUP;
+               dt_pin_specifier = "groups";

This is just kludgy. There are only two kernel-internal users of this function,
refactor the function signature and change the other callers over instead,
patch the drivers.

Take this opportunity to add some kerneldoc above the
pinconf_generic_dt_subnode_to_map() and give the function a
reasonable signature.

BTW: this is just for config settings for groups right? Not for muxing
I hope?

Yours,
Linus Walleij