3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
13 * The Real Time Clock (RTC) operation is verified by this test.
14 * The following features are verified:
16 * This is verified by analyzing the rtc_get() return status.
18 * This is verified by reading RTC in polling within
19 * a short period of time.
20 * o) Passing month boundaries
21 * This is checked by setting RTC to a second before
22 * a month boundary and reading it after its passing the
23 * boundary. The test is performed for both leap- and
30 #if CONFIG_POST & CONFIG_SYS_POST_RTC
32 static int rtc_post_skip (ulong * diff)
40 start1 = get_timer (0);
44 start2 = get_timer (0);
45 if (tm1.tm_sec != tm2.tm_sec)
47 if (start2 - start1 > 1500)
51 if (tm1.tm_sec != tm2.tm_sec) {
52 *diff = start2 - start1;
60 static void rtc_post_restore (struct rtc_time *tm, unsigned int sec)
62 time_t t = mktime (tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour,
63 tm->tm_min, tm->tm_sec) + sec;
71 int rtc_post_test (int flags)
76 static unsigned int daysnl[] =
77 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
78 static unsigned int daysl[] =
79 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
80 unsigned int ynl = 1999;
81 unsigned int yl = 2000;
82 unsigned int skipped = 0;
85 /* Time reliability */
86 reliable = rtc_get (&svtm);
89 if (rtc_post_skip (&diff) != 0) {
90 post_log ("Timeout while waiting for a new second !\n");
95 for (i = 0; i < 5; i++) {
96 if (rtc_post_skip (&diff) != 0) {
97 post_log ("Timeout while waiting for a new second !\n");
102 if (diff < 950 || diff > 1050) {
103 post_log ("Invalid second duration !\n");
109 /* Passing month boundaries */
111 if (rtc_post_skip (&diff) != 0) {
112 post_log ("Timeout while waiting for a new second !\n");
118 for (i = 0; i < 12; i++) {
119 time_t t = mktime (ynl, i + 1, daysnl[i], 23, 59, 59);
126 if (rtc_post_skip (&diff) != 0) {
127 rtc_post_restore (&svtm, skipped);
128 post_log ("Timeout while waiting for a new second !\n");
134 if (tm.tm_mon == i + 1) {
135 rtc_post_restore (&svtm, skipped);
136 post_log ("Month %d boundary is not passed !\n", i + 1);
142 for (i = 0; i < 12; i++) {
143 time_t t = mktime (yl, i + 1, daysl[i], 23, 59, 59);
150 if (rtc_post_skip (&diff) != 0) {
151 rtc_post_restore (&svtm, skipped);
152 post_log ("Timeout while waiting for a new second !\n");
158 if (tm.tm_mon == i + 1) {
159 rtc_post_restore (&svtm, skipped);
160 post_log ("Month %d boundary is not passed !\n", i + 1);
165 rtc_post_restore (&svtm, skipped);
167 /* If come here, then RTC operates correcty, check the correctness
168 * of the time it reports.
171 post_log ("RTC Time is not reliable! Power fault? \n");
179 #endif /* CONFIG_POST & CONFIG_SYS_POST_RTC */