pwm_utils.h

Go to the documentation of this file.

/*
 * Copyright (c) 2025 Basalte bv
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_PWM_PWM_UTILS_H_
#define ZEPHYR_INCLUDE_DRIVERS_PWM_PWM_UTILS_H_
 
#include <stdbool.h>
#include <stdint.h>
#include <errno.h>
 
#include <zephyr/devicetree.h>
#include <zephyr/drivers/pwm.h>
#include <zephyr/sys/__assert.h>
#include <zephyr/sys/slist.h>
 
#ifdef __cplusplus
extern "C" {
#endif

static inline int pwm_manage_event_callback(sys_slist_t *callbacks,
                                            struct pwm_event_callback *callback, bool set)
{
        __ASSERT_NO_MSG(callback != NULL);
        __ASSERT_NO_MSG(callback->handler != NULL);
 
        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 pwm_fire_event_callbacks(sys_slist_t *list, const struct device *dev,
                                            uint32_t channel, pwm_events_t events)
{
        struct pwm_event_callback *cb, *tmp;
 
        SYS_SLIST_FOR_EACH_CONTAINER_SAFE(list, cb, tmp, node) {
                if (cb->channel == channel) {
                        __ASSERT_NO_MSG(cb->handler != NULL);
 
                        cb->handler(dev, cb, channel, events);
                }
        }
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_PWM_PWM_UTILS_H_ */