From: Sonic Zhang <sonic.zhang@analog.com>
Date: Thu, 9 Apr 2015 03:13:07 +0000 (+0800)
Subject: pinctrl: allow exlusive GPIO/mux pin allocation
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~132^2~93
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fa76a3db7093a527333c380df82a0f158d9b8299;p=pandora-kernel.git

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>
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