[PATCH 0/4] pinctrl: add helpers for group based drivers

[Antoine Tenart]

Linus, Sebastian,

As discussed earlier this year[1], this series introduce helpers for group based
pinctrl drivers:
- of_pinctrl_utils_read_function(): reads the function name of a
specified node, and gets the number of groups it should be
applied to.
- of_pinctrl_for_each_function_group(): navigates through the groups of
a specified node, reading at each iteration the name of the current
group.

A generic function to parse nodes for group based drivers is also added, and
then used in the Berlin pinctrl driver:
- pinconf_generic_function_groups_dt_node_to_map()

[1] https://lkml.org/lkml/2014/5/17/38


Antoine Tenart (4):
Documentation: bindings: pinctrl: document the generic groups property
pinctrl: add helpers for group based drivers
pinctrl: add a generic way to map node to map for group based drivers
pinctrl: berlin: use the generic node to map function

.../bindings/pinctrl/pinctrl-bindings.txt | 1 +
drivers/pinctrl/berlin/Kconfig | 1 +
drivers/pinctrl/berlin/berlin.c | 53 +---------------------
drivers/pinctrl/pinconf-generic.c | 36 +++++++++++++++
drivers/pinctrl/pinctrl-utils.c | 26 +++++++++++
drivers/pinctrl/pinctrl-utils.h | 9 ++++
include/linux/pinctrl/pinconf-generic.h | 3 ++
7 files changed, 78 insertions(+), 51 deletions(-)