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Commit 827a9b8b authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Linus Walleij
Browse files

gpiolib: Clarify use of non-sleeping functions 



Obviously functions that are safe to be called from atomic contexts, can
be called from non-atomic contexts, too.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20190701142809.25308-1-geert+renesas@glider.be


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 3285170f

drivers/gpio/gpiolib.c

+8 −8
Original line number Diff line number Diff line
@@ -3031,7 +3031,7 @@ int gpiod_get_array_value_complex(bool raw, bool can_sleep, 
 * Return the GPIO's raw value, i.e. the value of the physical line disregarding

 * its ACTIVE_LOW status, or negative errno on failure.

 *

 * This function should be called from contexts where we cannot sleep, and will

 * This function can be called from contexts where we cannot sleep, and will

 * complain if the GPIO chip functions potentially sleep.

 */

int gpiod_get_raw_value(const struct gpio_desc *desc)
@@ -3050,7 +3050,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_raw_value); 
 * Return the GPIO's logical value, i.e. taking the ACTIVE_LOW status into

 * account, or negative errno on failure.

 *

 * This function should be called from contexts where we cannot sleep, and will

 * This function can be called from contexts where we cannot sleep, and will

 * complain if the GPIO chip functions potentially sleep.

 */

int gpiod_get_value(const struct gpio_desc *desc)
@@ -3083,7 +3083,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_value); 
 * without regard for their ACTIVE_LOW status.  Return 0 in case of success,

 * else an error code.

 *

 * This function should be called from contexts where we cannot sleep,

 * This function can be called from contexts where we cannot sleep,

 * and it will complain if the GPIO chip functions potentially sleep.

 */

int gpiod_get_raw_array_value(unsigned int array_size,
@@ -3109,7 +3109,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_raw_array_value); 
 * Read the logical values of the GPIOs, i.e. taking their ACTIVE_LOW status

 * into account.  Return 0 in case of success, else an error code.

 *

 * This function should be called from contexts where we cannot sleep,

 * This function can be called from contexts where we cannot sleep,

 * and it will complain if the GPIO chip functions potentially sleep.

 */

int gpiod_get_array_value(unsigned int array_size,
@@ -3323,7 +3323,7 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep, 
 * Set the raw value of the GPIO, i.e. the value of its physical line without

 * regard for its ACTIVE_LOW status.

 *

 * This function should be called from contexts where we cannot sleep, and will

 * This function can be called from contexts where we cannot sleep, and will

 * complain if the GPIO chip functions potentially sleep.

 */

void gpiod_set_raw_value(struct gpio_desc *desc, int value)
@@ -3364,7 +3364,7 @@ static void gpiod_set_value_nocheck(struct gpio_desc *desc, int value) 
 * Set the logical value of the GPIO, i.e. taking its ACTIVE_LOW,

 * OPEN_DRAIN and OPEN_SOURCE flags into account.

 *

 * This function should be called from contexts where we cannot sleep, and will

 * This function can be called from contexts where we cannot sleep, and will

 * complain if the GPIO chip functions potentially sleep.

 */

void gpiod_set_value(struct gpio_desc *desc, int value)
@@ -3386,7 +3386,7 @@ EXPORT_SYMBOL_GPL(gpiod_set_value); 
 * Set the raw values of the GPIOs, i.e. the values of the physical lines

 * without regard for their ACTIVE_LOW status.

 *

 * This function should be called from contexts where we cannot sleep, and will

 * This function can be called from contexts where we cannot sleep, and will

 * complain if the GPIO chip functions potentially sleep.

 */

int gpiod_set_raw_array_value(unsigned int array_size,
@@ -3411,7 +3411,7 @@ EXPORT_SYMBOL_GPL(gpiod_set_raw_array_value); 
 * Set the logical values of the GPIOs, i.e. taking their ACTIVE_LOW status

 * into account.

 *

 * This function should be called from contexts where we cannot sleep, and will

 * This function can be called from contexts where we cannot sleep, and will

 * complain if the GPIO chip functions potentially sleep.

 */

int gpiod_set_array_value(unsigned int array_size,