gpio_utils.h

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/*
 * Copyright (c) 2016 Intel Corporation.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_GPIO_GPIO_UTILS_H_
#define ZEPHYR_INCLUDE_DRIVERS_GPIO_GPIO_UTILS_H_
 
#include <stdbool.h>
#include <stdint.h>
#include <errno.h>
 
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/sys/__assert.h>
#include <zephyr/sys/slist.h>
 
#define GPIO_PORT_PIN_MASK_FROM_NGPIOS(ngpios) \
 ((gpio_port_pins_t)(((uint64_t)1 << (ngpios)) - 1U))
 
#define GPIO_PORT_PIN_MASK_FROM_DT_NODE(node_id) \
 GPIO_DT_PORT_PIN_MASK_NGPIOS_EXC(node_id, DT_PROP(node_id, ngpios))
 
#define GPIO_PORT_PIN_MASK_FROM_DT_INST(inst) \
 GPIO_PORT_PIN_MASK_FROM_DT_NODE(DT_DRV_INST(inst))
 
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;
 }
 }
 } else if (!set) {
 return -EINVAL;
 }
 
 if (set) {
 sys_slist_prepend(callbacks, &callback->node);
 }
 
 return 0;
}
 
static inline void gpio_fire_callbacks(sys_slist_t *list,
 const struct device *port,
 uint32_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_INCLUDE_DRIVERS_GPIO_GPIO_UTILS_H_ */