Skip to main content

GPIO Controller (gpio)

GPIO controller.

Device Type​

DEVICE_TYPE_GPIOCHIP

Struct​

struct gpiochip_t {
    char * name;
    int base, ngpio;
    int (*set_cfg)(struct gpiochip_t * chip, int offset, int cfg);
    int (*get_cfg)(struct gpiochip_t * chip, int offset);
    int (*set_pull)(struct gpiochip_t * chip, int offset, enum gpio_pull_t pull);
    int (*get_pull)(struct gpiochip_t * chip, int offset);
    int (*set_drv)(struct gpiochip_t * chip, int offset, enum gpio_drv_t drv);
    int (*get_drv)(struct gpiochip_t * chip, int offset);
    int (*set_dir)(struct gpiochip_t * chip, int offset, int dir);
    int (*get_dir)(struct gpiochip_t * chip, int offset);
    int (*set_value)(struct gpiochip_t * chip, int offset, int value);
    int (*get_value)(struct gpiochip_t * chip, int offset);
    int (*to_irq)(struct gpiochip_t * chip, int offset);
    void * priv;
};

Key API​

FunctionDescription
search_gpiochip(name)Find GPIO controller by name
register_gpiochip(chip, drv)Register GPIO controller
unregister_gpiochip(chip)Unregister GPIO controller
gpio_set/get_value(gpio, value)Set/get GPIO value
gpio_direction_output/input(gpio)Set output/input mode
gpio_to_irq(gpio)Convert GPIO to IRQ number

Description​

GPIO controller interface. Controls pins using a global numbering space, supports function configuration, pull-up/down, drive strength and direction.