gpio.h File Reference

#include <stddef.h>
#include <stdint.h>
#include <pbl/device.h>
#include <pbl/drivers/intc.h>

Data Structures
struct	pbl_gpio_port_ops
	Port driver operations. More...
struct	pbl_gpio_port
	A GPIO controller. More...
struct	pbl_gpio
	A pin as wired on the board. More...

Macros
#define	PBL_GPIO_PORT_INIT(sym, _name, _init, _parent, _ops, _num_pins, _intc)
	Initializer for a struct pbl_gpio_port.
#define	PBL_GPIO_DT_FLAGS(f)
	Pin flags from the flags cell of a devicetree GPIO specifier.
#define	PBL_GPIO(_port, _pin, _flags)   {.port = (_port), .pin = (_pin), .flags = (_flags)}
	Initializer for a struct pbl_gpio.
Wiring flags
Describe the pin as routed on the board, stored in struct pbl_gpio.
#define	PBL_GPIO_ACTIVE_LOW   (1U << 0)
	The pin is active when low.
#define	PBL_GPIO_PULL_UP   (1U << 1)
	Enable the pull-up.
#define	PBL_GPIO_PULL_DOWN   (1U << 2)
	Enable the pull-down.
#define	PBL_GPIO_OPEN_DRAIN   (1U << 3)
	Drive the output low only.
Configuration flags
Passed to pbl_gpio_configure(), OR'ed with the wiring flags.
#define	PBL_GPIO_INPUT   (1U << 4)
	Input.
#define	PBL_GPIO_OUTPUT   (1U << 5)
	Output, keeping the current level.
#define	PBL_GPIO_OUTPUT_INIT_LOW   (1U << 6)
	Physical initial level low.
#define	PBL_GPIO_OUTPUT_INIT_HIGH   (1U << 7)
	Physical initial level high.
#define	PBL_GPIO_OUTPUT_INIT_LOGICAL   (1U << 8)
	The initial level is logical: inverted on an active-low pin.
#define	PBL_GPIO_OUTPUT_LOW   (PBL_GPIO_OUTPUT | PBL_GPIO_OUTPUT_INIT_LOW)
	Output, physically low.
#define	PBL_GPIO_OUTPUT_HIGH   (PBL_GPIO_OUTPUT | PBL_GPIO_OUTPUT_INIT_HIGH)
	Output, physically high.
#define	PBL_GPIO_OUTPUT_INACTIVE   (PBL_GPIO_OUTPUT_LOW | PBL_GPIO_OUTPUT_INIT_LOGICAL)
	Output, inactive.
#define	PBL_GPIO_OUTPUT_ACTIVE   (PBL_GPIO_OUTPUT_HIGH | PBL_GPIO_OUTPUT_INIT_LOGICAL)
	Output, active.

Functions
static bool	pbl_gpio_is_connected (const struct pbl_gpio *gpio)
	Check whether a pin is connected.
int	pbl_gpio_configure (const struct pbl_gpio *gpio, uint32_t flags)
	Configure a pin.
int	pbl_gpio_get (const struct pbl_gpio *gpio)
	Read the logical level of a pin.
int	pbl_gpio_set (const struct pbl_gpio *gpio, bool active)
	Drive the logical level of a pin.
int	pbl_gpio_get_raw (const struct pbl_gpio *gpio)
	Read the physical level of a pin.
int	pbl_gpio_set_raw (const struct pbl_gpio *gpio, bool level)
	Drive the physical level of a pin.
int	pbl_gpio_to_irq (const struct pbl_gpio *gpio, uint32_t type, struct pbl_irq_spec *spec)
	Get the interrupt line of a pin.

Variables
const struct pbl_device_class	pbl_gpio_port_class
	Class of the GPIO ports.