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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
drivers/gpio/gpio-uclass.c
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@@ -257,7 +257,7 @@ int gpio_free(unsigned gpio)
return _dm_gpio_free(desc.dev, desc.offset);
}
static int check_reserved(struct gpio_desc *desc, const char *func)
static int check_reserved(const struct gpio_desc *desc, const char *func)
{
struct gpio_dev_priv *uc_priv;
@@ -324,7 +324,7 @@ int gpio_direction_output(unsigned gpio, int value)
desc.offset, value);
}
int dm_gpio_get_value(struct gpio_desc *desc)
int dm_gpio_get_value(const struct gpio_desc *desc)
{
int value;
int ret;
@@ -338,7 +338,7 @@ int dm_gpio_get_value(struct gpio_desc *desc)
return desc->flags & GPIOD_ACTIVE_LOW ? !value : value;
}
int dm_gpio_set_value(struct gpio_desc *desc, int value)
int dm_gpio_set_value(const struct gpio_desc *desc, int value)
{
int ret;
@@ -577,7 +577,7 @@ int gpio_get_values_as_int(const int *gpio_list)
return vector;
}
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)
{
unsigned bitmask = 1;
unsigned vector = 0;
@@ -766,7 +766,7 @@ static int gpio_renumber(struct udevice *removed_dev)
return 0;
}
int gpio_get_number(struct gpio_desc *desc)
int gpio_get_number(const struct gpio_desc *desc)
{
struct udevice *dev = desc->dev;
struct gpio_dev_priv *uc_priv;