1 /*
2 * Copyright 2022 Bjarki Arge Andreasen
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/ztest.h>
8 #include <zephyr/kernel.h>
9 #include <zephyr/device.h>
10 #include <zephyr/drivers/rtc.h>
11
12 #define RTC_TEST_CAL_RANGE_LIMIT (200000)
13 #define RTC_TEST_CAL_RANGE_STEP (10000)
14
15 static const struct device *rtc = DEVICE_DT_GET(DT_ALIAS(rtc));
16
test_set_get_calibration(int32_t calibrate_set)17 static int test_set_get_calibration(int32_t calibrate_set)
18 {
19 int32_t calibrate_get;
20 int ret;
21
22 ret = rtc_set_calibration(rtc, calibrate_set);
23
24 /* Check if calibration is within limits of hardware */
25 if (ret == -EINVAL) {
26 /* skip */
27 return -EINVAL;
28 }
29
30 /* Validate calibration was set */
31 zassert_ok(ret, "Failed to set calibration");
32
33 ret = rtc_get_calibration(rtc, &calibrate_get);
34
35 /* Validate calibration was gotten */
36 zassert_ok(ret, "Failed to get calibration");
37
38 /* Print comparison between set and get values */
39 printk("Calibrate (set,get): %i, %i\n", calibrate_set, calibrate_get);
40
41 return 0;
42 }
43
ZTEST(rtc_api,test_set_get_calibration)44 ZTEST(rtc_api, test_set_get_calibration)
45 {
46 int32_t calibrate_get;
47 int ret;
48 int32_t range_limit;
49 int32_t range_step;
50
51 ret = rtc_set_calibration(rtc, 0);
52
53 /* Validate calibration was set */
54 zassert_ok(ret, "Failed to set calibration");
55
56 ret = rtc_get_calibration(rtc, &calibrate_get);
57
58 /* Validate calibration was gotten */
59 zassert_ok(ret, "Failed to get calibration");
60
61 /* Validate edge values (0 already tested) */
62 test_set_get_calibration(1);
63 test_set_get_calibration(-1);
64
65 range_limit = RTC_TEST_CAL_RANGE_LIMIT;
66 range_step = RTC_TEST_CAL_RANGE_STEP;
67
68 /* Validate over negative range */
69 for (int32_t set = range_step; set <= range_limit; set += range_step) {
70 ret = test_set_get_calibration(-set);
71
72 if (ret < 0) {
73 /* Limit of hardware capabilties reached */
74 break;
75 }
76 }
77
78 /* Validate over positive range */
79 for (int32_t set = range_step; set <= range_limit; set += range_step) {
80 ret = test_set_get_calibration(set);
81
82 if (ret < 0) {
83 /* Limit of hardware capabilties reached */
84 break;
85 }
86 }
87 }
88
