pinctrl: allow exlusive GPIO/mux pin allocation
authorSonic Zhang <sonic.zhang@analog.com>
Thu, 9 Apr 2015 03:13:07 +0000 (11:13 +0800)
committerLinus Walleij <linus.walleij@linaro.org>
Wed, 6 May 2015 12:45:19 +0000 (14:45 +0200)
commitfa76a3db7093a527333c380df82a0f158d9b8299
treeadd57323d26140a8e2358da9b93066d096c9c38d
parentc30024a6449070d6fde51a8bddf4c97f884db2cc
pinctrl: allow exlusive GPIO/mux pin allocation

Disallow simultaneous use of the the GPIO and peripheral mux
functions by setting a flag "strict" in struct pinctrl_desc.

The blackfin pinmux and gpio controller doesn't allow user to
set up a pin for both GPIO and peripheral function. So, add flag
strict in struct pinctrl_desc to check both gpio_owner and
mux_owner before approving the pin request.

v2-changes:
- if strict flag is set, check gpio_owner and mux_onwer in if and
  else clause

v3-changes:
- add kerneldoc for this struct
- augment Documentation/pinctrl.txt

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Documentation/pinctrl.txt
drivers/pinctrl/pinctrl-adi2.c
drivers/pinctrl/pinmux.c
include/linux/pinctrl/pinctrl.h