From 1a1fa24066895dd4eca340c2c8fffd5f5df4d296 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Fri, 10 Apr 2015 01:11:54 +0200 Subject: [PATCH] rtc: Set valid date after reset Some RTC chips tend to set garbage date after reset. This patch sets the date to 2000-01-01 00:00 immediatelly after the RTC chip reset is issued using the "date reset" command. Signed-off-by: Marek Vasut Cc: Heiko Schocher Cc: Tom Rini --- common/cmd_date.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/common/cmd_date.c b/common/cmd_date.c index e3491662bc..4a653e5bcf 100644 --- a/common/cmd_date.c +++ b/common/cmd_date.c @@ -27,6 +27,8 @@ static const char * const weekdays[] = { int mk_date (const char *, struct rtc_time *); +static struct rtc_time default_tm = { 0, 0, 0, 1, 1, 2000, 6, 0, 0 }; + static int do_date(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { struct rtc_time tm; @@ -47,6 +49,9 @@ static int do_date(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (strcmp(argv[1],"reset") == 0) { puts ("Reset RTC...\n"); rtc_reset (); + rcode = rtc_set(&default_tm); + if (rcode) + puts("## Failed to set date after RTC reset\n"); } else { /* initialize tm with current time */ rcode = rtc_get (&tm); -- 2.39.5