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author | Sonic Zhang <sonic.zhang@analog.com> | 2015-04-09 06:13:07 +0300 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2015-05-06 15:45:19 +0300 |
commit | fa76a3db7093a527333c380df82a0f158d9b8299 (patch) | |
tree | add57323d26140a8e2358da9b93066d096c9c38d /include/linux | |
parent | c30024a6449070d6fde51a8bddf4c97f884db2cc (diff) | |
download | linux-fa76a3db7093a527333c380df82a0f158d9b8299.tar.xz |
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>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/pinctrl/pinctrl.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h index 66e4697516de..fc6b0348c375 100644 --- a/include/linux/pinctrl/pinctrl.h +++ b/include/linux/pinctrl/pinctrl.h @@ -114,6 +114,8 @@ struct pinctrl_ops { * of the pins field above * @pctlops: pin control operation vtable, to support global concepts like * grouping of pins, this is optional. + * @strict: check both gpio_owner and mux_owner strictly before approving + the pin request * @pmxops: pinmux operations vtable, if you support pinmuxing in your driver * @confops: pin config operations vtable, if you support pin configuration in * your driver @@ -132,6 +134,7 @@ struct pinctrl_desc { const struct pinctrl_ops *pctlops; const struct pinmux_ops *pmxops; const struct pinconf_ops *confops; + bool strict; struct module *owner; #ifdef CONFIG_GENERIC_PINCONF unsigned int num_custom_params; |