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gpio: support gpio set/get pull status 

On some platform gpio can set/get pull status when input, add these
function so we can set/get gpio pull status when need it. And they are
optional function.
This commit is contained in:
Caesar Wang 2016-05-25 18:48:45 +08:00
parent e141aa0357
commit 195889829e
2 changed files with 28 additions and 0 deletions
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20
drivers/gpio/gpio.c
View File

@ -80,6 +80,26 @@ void gpio_set_value(int gpio, int value)
ops->set_value(gpio, value);
}
void gpio_set_pull(int gpio, int pull)
{
assert(ops);
assert(ops->set_pull != 0);
assert((pull == GPIO_PULL_NONE) || (pull == GPIO_PULL_UP) ||
(pull == GPIO_PULL_DOWN));
assert(gpio >= 0);
ops->set_pull(gpio, pull);
}
int gpio_get_pull(int gpio)
{
assert(ops);
assert(ops->get_pull != 0);
assert(gpio >= 0);
return ops->get_pull(gpio);
}
/*
* Initialize the gpio. The fields in the provided gpio
* ops pointer must be valid.

8
include/drivers/gpio.h
View File

@ -37,17 +37,25 @@
#define GPIO_LEVEL_LOW 0
#define GPIO_LEVEL_HIGH 1
#define GPIO_PULL_NONE 0
#define GPIO_PULL_UP 1
#define GPIO_PULL_DOWN 2
typedef struct gpio_ops {
int (*get_direction)(int gpio);
void (*set_direction)(int gpio, int direction);
int (*get_value)(int gpio);
void (*set_value)(int gpio, int value);
void (*set_pull)(int gpio, int pull);
int (*get_pull)(int gpio);
} gpio_ops_t;
int gpio_get_direction(int gpio);
void gpio_set_direction(int gpio, int direction);
int gpio_get_value(int gpio);
void gpio_set_value(int gpio, int value);
void gpio_set_pull(int gpio, int pull);
int gpio_get_pull(int gpio);
void gpio_init(const gpio_ops_t *ops);
#endif /* __GPIO_H__ */