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gpio: add gpio_pin_interrupt_configure function

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This commit moves interrupt configuration for a single pin from
gpio_pin_configure to gpio_pin_interrupt_configure function.

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This commit is contained in:
Piotr Mienkowski 2019-06-30 21:52:18 +02:00 • committed by Carles Cufí
commit 33193a57eb
2 changed files with 46 additions and 0 deletions
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37
include/drivers/gpio.h
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@ -450,6 +450,8 @@ struct gpio_driver_api {
int (*port_set_bits_raw)(struct device *port, gpio_pins_t pins);
int (*port_clear_bits_raw)(struct device *port, gpio_pins_t pins);
int (*port_toggle_bits)(struct device *port, gpio_pins_t pins);
int (*pin_interrupt_configure)(struct device *port, unsigned int pin,
unsigned int flags);
int (*manage_callback)(struct device *port, struct gpio_callback *cb,
bool set);
int (*enable_callback)(struct device *port, int access_op, u32_t pin);
@ -966,6 +968,41 @@ static inline int gpio_pin_read(struct device *port, u32_t pin,
return gpio_read(port, GPIO_ACCESS_BY_PIN, pin, value);
}
/**
* @brief Configure pin interrupt.
*
* @note This function can also be used to configure interrupts on pins
* not controlled directly by the GPIO module. That is, pins which are
* routed to other modules such as I2C, SPI, UART.
*
* @param port Pointer to device structure for the driver instance.
* @param pin Pin number.
* @param flags Interrupt configuration flags as defined by GPIO_INT_*.
*
* @retval 0 If successful.
* @retval -ENOTSUP If any of the configuration options is not supported.
* @retval -EINVAL Invalid argument.
* @retval -EBUSY Interrupt line required to configure pin interrupt is
* already in use.
*/
__syscall int gpio_pin_interrupt_configure(struct device *port,
unsigned int pin, unsigned int flags);
static inline int z_impl_gpio_pin_interrupt_configure(struct device *port,
unsigned int pin, unsigned int flags)
{
const struct gpio_driver_api *api =
(const struct gpio_driver_api *)port->driver_api;
__ASSERT(pin < GPIO_MAX_PINS_PER_PORT, "Invalid pin number");
__ASSERT(((flags & GPIO_INT_ENABLE) == 0) ||
((flags & (GPIO_INT_LOW_0 | GPIO_INT_HIGH_1)) != 0),
"At least one of GPIO_INT_LOW_0, GPIO_INT_HIGH_1 has to be "
"enabled.");
return api->pin_interrupt_configure(port, pin, flags);
}
/**
* @brief Helper to initialize a struct gpio_callback properly
* @param callback A valid Application's callback structure pointer.