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Commit 3946d187 authored by Dmitry Torokhov's avatar Dmitry Torokhov Committed by Linus Walleij
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gpio: add gpio_add_lookup_tables() to add several tables at once 



When converting legacy board to use gpiod API() there might be several
lookup tables in board file, let's provide a way to register them all at
once.

Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 33f5dc84

drivers/gpio/gpiolib.c

+17 −0
Original line number Diff line number Diff line
@@ -3010,6 +3010,23 @@ void gpiod_set_raw_array_value_cansleep(unsigned int array_size, 
}

EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value_cansleep);



/**

 * gpiod_add_lookup_tables() - register GPIO device consumers

 * @tables: list of tables of consumers to register

 * @n: number of tables in the list

 */

void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n)

{

	unsigned int i;



	mutex_lock(&gpio_lookup_lock);



	for (i = 0; i < n; i++)

		list_add_tail(&tables[i]->list, &gpio_lookup_list);



	mutex_unlock(&gpio_lookup_lock);

}



/**

 * gpiod_set_array_value_cansleep() - assign values to an array of GPIOs

 * @array_size: number of elements in the descriptor / value arrays

include/linux/gpio/machine.h

+3 −0
Original line number Diff line number Diff line
@@ -60,11 +60,14 @@ struct gpiod_lookup_table { 


#ifdef CONFIG_GPIOLIB

void gpiod_add_lookup_table(struct gpiod_lookup_table *table);

void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n);

void gpiod_remove_lookup_table(struct gpiod_lookup_table *table);

#else

static inline

void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}

static inline

void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {}

static inline

void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {}

#endif