dm: rtc: Rename gregorian day function
Change this function name to something more descriptive. Also return a
failure code if it cannot calculate a correct value.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/common/cmd_date.c b/common/cmd_date.c
index 4a653e5..dfb9349 100644
--- a/common/cmd_date.c
+++ b/common/cmd_date.c
@@ -201,7 +201,7 @@
tmp->tm_min = val;
/* calculate day of week */
- GregorianDay (tmp);
+ rtc_calc_weekday(tmp);
return (0);
default:
diff --git a/drivers/rtc/date.c b/drivers/rtc/date.c
index 15e6db0..2000565 100644
--- a/drivers/rtc/date.c
+++ b/drivers/rtc/date.c
@@ -11,6 +11,7 @@
#include <common.h>
#include <command.h>
+#include <errno.h>
#include <rtc.h>
#if defined(CONFIG_CMD_DATE) || defined(CONFIG_TIMESTAMP)
@@ -30,13 +31,15 @@
/*
* This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
*/
-void GregorianDay(struct rtc_time * tm)
+int rtc_calc_weekday(struct rtc_time *tm)
{
int leapsToDate;
int lastYear;
int day;
int MonthOffset[] = { 0,31,59,90,120,151,181,212,243,273,304,334 };
+ if (tm->tm_year < 1753)
+ return -EINVAL;
lastYear=tm->tm_year-1;
/*
@@ -64,6 +67,8 @@
day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] + tm->tm_mday;
tm->tm_wday=day%7;
+
+ return 0;
}
void to_tm(int tim, struct rtc_time * tm)
@@ -101,7 +106,7 @@
/*
* Determine the day of week
*/
- GregorianDay(tm);
+ rtc_calc_weekday(tm);
}
/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
diff --git a/drivers/rtc/ds1306.c b/drivers/rtc/ds1306.c
index 1ec1837..3fe6721 100644
--- a/drivers/rtc/ds1306.c
+++ b/drivers/rtc/ds1306.c
@@ -110,7 +110,7 @@
immap->im_cpm.cp_pbdat &= ~PB_SPI_CE; /* Disable DS1306 Chip */
udelay (10);
- GregorianDay (tmp); /* Determine the day of week */
+ rtc_calc_weekday(tmp); /* Determine the day of week */
debug ("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
diff --git a/include/rtc.h b/include/rtc.h
index 54e361e..96c696a 100644
--- a/include/rtc.h
+++ b/include/rtc.h
@@ -45,7 +45,6 @@
int rtc_set (struct rtc_time *);
void rtc_reset (void);
-void GregorianDay (struct rtc_time *);
void to_tm (int, struct rtc_time *);
unsigned long mktime (unsigned int, unsigned int, unsigned int,
unsigned int, unsigned int, unsigned int);
@@ -87,4 +86,15 @@
*/
void rtc_init(void);
+/**
+ * rtc_calc_weekday() - Work out the weekday from a time
+ *
+ * This only works for the Gregorian calendar - i.e. after 1752 (in the UK).
+ * It sets time->tm_wdaay to the correct day of the week.
+ *
+ * @time: Time to inspect. tm_wday is updated
+ * @return 0 if OK, -EINVAL if the weekday could not be determined
+ */
+int rtc_calc_weekday(struct rtc_time *time);
+
#endif /* _RTC_H_ */