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git.ipfire.org Git - people/ms/u-boot.git/blob - post/drivers/rtc.c
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 */