1 /*
2  * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 
7 #include <zephyr/kernel.h>
8 #include "esp_log.h"
9 #include "esp_check.h"
10 #include "esp_timer.h"
11 #include "soc/soc_etm_source.h"
12 #include "esp_private/systimer.h"
13 #include "esp_private/etm_interface.h"
14 
15 static const char *TAG = "esptimer-etm";
16 
esp_timer_etm_event_del(esp_etm_event_t * event)17 static esp_err_t esp_timer_etm_event_del(esp_etm_event_t *event)
18 {
19     k_free(event);
20     return ESP_OK;
21 }
22 
esp_timer_new_etm_alarm_event(esp_etm_event_handle_t * out_event)23 esp_err_t esp_timer_new_etm_alarm_event(esp_etm_event_handle_t *out_event)
24 {
25     esp_etm_event_t *event = NULL;
26     esp_err_t ret = ESP_OK;
27     ESP_GOTO_ON_FALSE(out_event, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
28     event = k_calloc(1, sizeof(esp_etm_event_t));
29     ESP_GOTO_ON_FALSE(event, ESP_ERR_NO_MEM, err, TAG, "no memory for ETM event");
30 
31     // fill the ETM event object
32     uint32_t event_id = SYSTIMER_EVT_CNT_CMP0 + SYSTIMER_ALARM_ESPTIMER;
33     event->event_id = event_id;
34     event->trig_periph = ETM_TRIG_PERIPH_SYSTIMER;
35     event->del = esp_timer_etm_event_del;
36     *out_event = event;
37     return ESP_OK;
38 
39 err:
40     if (event) {
41         esp_timer_etm_event_del(event);
42     }
43     return ret;
44 }
45