Hello Simon,

Am 20.04.2015 20:37, schrieb Simon Glass:
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 <s...@chromium.org>
---

  common/cmd_date.c    |  2 +-
  drivers/rtc/date.c   |  9 +++++++--
  drivers/rtc/ds1306.c |  2 +-
  include/rtc.h        | 12 +++++++++++-
  4 files changed, 20 insertions(+), 5 deletions(-)

Acked-by: Heiko Schocher <h...@denx.de>

bye,
Heiko

diff --git a/common/cmd_date.c b/common/cmd_date.c
index e349166..3b7ac3e 100644
--- a/common/cmd_date.c
+++ b/common/cmd_date.c
@@ -196,7 +196,7 @@ int mk_date (const char *datestr, struct rtc_time *tmp)
                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 @@ static int month_days[12] = {
  /*
   * 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 @@ void GregorianDay(struct rtc_time * tm)
        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 @@ void to_tm(int tim, struct rtc_time * tm)
        /*
         * 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 @@ int rtc_get (struct rtc_time *tmp)
        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_get (struct rtc_time *);
  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_write32(int reg, u32 value);
   */
  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_ */


--
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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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