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gpio: Use const where possible

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Some functions do not change the struct gpio_desc parameter. Update these to
use const so this is clear.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2016-03-06 19:27:51 -07:00 • committed by Bin Meng
parent bbf2478026
commit 17c43f1a42
2 changed files with 10 additions and 10 deletions
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10
include/asm-generic/gpio.h
View file

@ -133,7 +133,7 @@ struct gpio_desc {
* previously returned by gpio_request_by_name()
* @return true if valid, false if not
*/
static inline bool dm_gpio_is_valid(struct gpio_desc *desc)
static inline bool dm_gpio_is_valid(const struct gpio_desc *desc)
{
return desc->dev != NULL;
}
@ -369,7 +369,7 @@ int gpio_get_values_as_int(const int *gpio_list);
* @count: Number of GPIOs
* @return resulting integer value, or -ve on error
*/
int dm_gpio_get_values_as_int(struct gpio_desc *desc_list, int count);
int dm_gpio_get_values_as_int(const struct gpio_desc *desc_list, int count);
/**
* gpio_claim_vector() - claim a number of GPIOs for input
@ -536,9 +536,9 @@ int gpio_free_list_nodev(struct gpio_desc *desc, int count);
* previously returned by gpio_request_by_name()
* @return GPIO value (0 for inactive, 1 for active) or -ve on error
*/
int dm_gpio_get_value(struct gpio_desc *desc);
int dm_gpio_get_value(const struct gpio_desc *desc);
int dm_gpio_set_value(struct gpio_desc *desc, int value);
int dm_gpio_set_value(const struct gpio_desc *desc, int value);
/**
* dm_gpio_set_dir() - Set the direction for a GPIO
@ -577,6 +577,6 @@ int dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags);
* previously returned by gpio_request_by_name()
* @return GPIO number, or -ve if not found
*/
int gpio_get_number(struct gpio_desc *desc);
int gpio_get_number(const struct gpio_desc *desc);
#endif /* _ASM_GENERIC_GPIO_H_ */