diff options
| author | Shobhit Kumar <shobhit.kumar@intel.com> | 2015-06-26 09:02:04 (GMT) |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-07-21 07:21:40 (GMT) |
| commit | be9015abb8296d8dc72cef4da75fa30e88ab7c81 (patch) | |
| tree | dc056c1357a1138b7ba99c826a284e39fcd6ff6d | |
| parent | 52721d9d3334c1cb1f76219a161084094ec634dc (diff) | |
| download | linux-be9015abb8296d8dc72cef4da75fa30e88ab7c81.tar.xz | |
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>
| -rw-r--r-- | drivers/gpio/gpiolib.c | 13 | ||||
| -rw-r--r-- | include/linux/gpio/machine.h | 1 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index bf4bd1d..f25dc88 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) diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h index e270614..c0d712d 100644 --- a/include/linux/gpio/machine.h +++ b/include/linux/gpio/machine.h @@ -57,5 +57,6 @@ struct gpiod_lookup_table { } void gpiod_add_lookup_table(struct gpiod_lookup_table *table); +void gpiod_remove_lookup_table(struct gpiod_lookup_table *table); #endif /* __LINUX_GPIO_MACHINE_H */ |