diff options
| author |   Shobhit Kumar <shobhit.kumar@intel.com> | 2015-06-26 14:32:04 +0530 |
|---|---|---|
| committer |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-07-21 09:21:40 +0200 |
| commit | be9015abb8296d8dc72cef4da75fa30e88ab7c81 (patch) | |
| tree | dc056c1357a1138b7ba99c826a284e39fcd6ff6d /drivers/gpio | |
| parent | Linux 4.2-rc3 (diff) | |
| download | linux-dev-be9015abb8296d8dc72cef4da75fa30e88ab7c81.tar.xz linux-dev-be9015abb8296d8dc72cef4da75fa30e88ab7c81.zip | |
gpiolib: Add support for removing registered consumer lookup table
In case we unload and load a driver module again that is registering a
lookup table, without this it will result in multiple entries. Provide
an option to remove the lookup table on driver unload
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index bf4bd1d120c3..f25dc880b007 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1672,6 +1672,19 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table) mutex_unlock(&gpio_lookup_lock); } +/** + * gpiod_remove_lookup_table() - unregister GPIO device consumers + * @table: table of consumers to unregister + */ +void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) +{ + mutex_lock(&gpio_lookup_lock); + + list_del(&table->list); + + mutex_unlock(&gpio_lookup_lock); +} + static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, unsigned int idx, enum gpio_lookup_flags *flags) |