mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
d74be6dfea
gpio_lock/unlock_as_irq() are working with (chip, offset) arguments and are thus not using the old integer namespace. Therefore, there is no reason to have gpiod variants of these functions working with descriptors, especially since the (chip, offset) tuple is more suitable to the users of these functions (GPIO drivers, whereas GPIO descriptors are targeted at GPIO consumers). 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);
|