mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
c7caf86823
gpio_ensure_requested() has been introduced in Feb. 2008 by commit
d2876d08d8 to force users of the GPIO API to explicitly request GPIOs
before using them.
Hopefully by now all GPIOs are correctly requested and this extra check
can be omitted ; in any case the GPIO maintainers won't feel bad if
machines start failing after 6 years of warnings.
This patch removes that function from the dark ages.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
#include <linux/gpio/consumer.h>
|
|
#include <linux/gpio/driver.h>
|
|
|
|
#include <linux/gpio.h>
|
|
|
|
#include "gpiolib.h"
|
|
|
|
void gpio_free(unsigned gpio)
|
|
{
|
|
gpiod_free(gpio_to_desc(gpio));
|
|
}
|
|
EXPORT_SYMBOL_GPL(gpio_free);
|
|
|
|
/**
|
|
* gpio_request_one - request a single GPIO with initial configuration
|
|
* @gpio: the GPIO number
|
|
* @flags: GPIO configuration as specified by GPIOF_*
|
|
* @label: a literal description string of this GPIO
|
|
*/
|
|
int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
|
|
{
|
|
struct gpio_desc *desc;
|
|
int err;
|
|
|
|
desc = gpio_to_desc(gpio);
|
|
|
|
err = gpiod_request(desc, label);
|
|
if (err)
|
|
return err;
|
|
|
|
if (flags & GPIOF_OPEN_DRAIN)
|
|
set_bit(FLAG_OPEN_DRAIN, &desc->flags);
|
|
|
|
if (flags & GPIOF_OPEN_SOURCE)
|
|
set_bit(FLAG_OPEN_SOURCE, &desc->flags);
|
|
|
|
if (flags & GPIOF_ACTIVE_LOW)
|
|
set_bit(FLAG_ACTIVE_LOW, &desc->flags);
|
|
|
|
if (flags & GPIOF_DIR_IN)
|
|
err = gpiod_direction_input(desc);
|
|
else
|
|
err = gpiod_direction_output_raw(desc,
|
|
(flags & GPIOF_INIT_HIGH) ? 1 : 0);
|
|
|
|
if (err)
|
|
goto free_gpio;
|
|
|
|
if (flags & GPIOF_EXPORT) {
|
|
err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
|
|
if (err)
|
|
goto free_gpio;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_gpio:
|
|
gpiod_free(desc);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gpio_request_one);
|
|
|
|
int gpio_request(unsigned gpio, const char *label)
|
|
{
|
|
return gpiod_request(gpio_to_desc(gpio), label);
|
|
}
|
|
EXPORT_SYMBOL_GPL(gpio_request);
|
|
|
|
/**
|
|
* gpio_request_array - request multiple GPIOs in a single call
|
|
* @array: array of the 'struct gpio'
|
|
* @num: how many GPIOs in the array
|
|
*/
|
|
int gpio_request_array(const struct gpio *array, size_t num)
|
|
{
|
|
int i, err;
|
|
|
|
for (i = 0; i < num; i++, array++) {
|
|
err = gpio_request_one(array->gpio, array->flags, array->label);
|
|
if (err)
|
|
goto err_free;
|
|
}
|
|
return 0;
|
|
|
|
err_free:
|
|
while (i--)
|
|
gpio_free((--array)->gpio);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gpio_request_array);
|
|
|
|
/**
|
|
* gpio_free_array - release multiple GPIOs in a single call
|
|
* @array: array of the 'struct gpio'
|
|
* @num: how many GPIOs in the array
|
|
*/
|
|
void gpio_free_array(const struct gpio *array, size_t num)
|
|
{
|
|
while (num--)
|
|
gpio_free((array++)->gpio);
|
|
}
|
|
EXPORT_SYMBOL_GPL(gpio_free_array);
|