blob: ea1ccf42dca455bcdfec3c15cbfa8258111e4809 [file] [log] [blame]
/*
* Copyright (c) 2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file Header where utility code can be found for GPIO drivers
*/
#ifndef ZEPHYR_DRIVERS_GPIO_GPIO_UTILS_H_
#define ZEPHYR_DRIVERS_GPIO_GPIO_UTILS_H_
#define GPIO_PORT_PIN_MASK_FROM_NGPIOS(ngpios) \
((gpio_port_pins_t)(((u64_t)1 << (ngpios)) - 1U))
/**
* @brief Generic function to insert or remove a callback from a callback list
*
* @param callbacks A pointer to the original list of callbacks (can be NULL)
* @param callback A pointer of the callback to insert or remove from the list
* @param set A boolean indicating insertion or removal of the callback
*
* @return 0 on success, negative errno otherwise.
*/
static inline int gpio_manage_callback(sys_slist_t *callbacks,
struct gpio_callback *callback,
bool set)
{
__ASSERT(callback, "No callback!");
__ASSERT(callback->handler, "No callback handler!");
if (!sys_slist_is_empty(callbacks)) {
if (!sys_slist_find_and_remove(callbacks, &callback->node)) {
if (!set) {
return -EINVAL;
}
}
}
if (set) {
sys_slist_prepend(callbacks, &callback->node);
}
return 0;
}
/**
* @brief Generic function to go through and fire callback from a callback list
*
* @param list A pointer on the gpio callback list
* @param port A pointer on the gpio driver instance
* @param pins The actual pin mask that triggered the interrupt
*/
static inline void gpio_fire_callbacks(sys_slist_t *list,
struct device *port,
u32_t pins)
{
struct gpio_callback *cb, *tmp;
SYS_SLIST_FOR_EACH_CONTAINER_SAFE(list, cb, tmp, node) {
if (cb->pin_mask & pins) {
__ASSERT(cb->handler, "No callback handler!");
cb->handler(port, cb, cb->pin_mask & pins);
}
}
}
#endif /* ZEPHYR_DRIVERS_GPIO_GPIO_UTILS_H_ */