On Maw, 2005-12-20 at 14:32 +0530, Mukund JB. wrote:
> > > I tried the /dev/rtc but I don't get it there.
> >
> > Use /dev/nvram instead.
> >
> > Dave
>
> /dev/nvram does not give the cpomplete CMOS details. A part of RTC & date, tine and other info will be missing.
What Dave should have said is use /dev/nvram as well.
>From /dev/rtc you get registers 0-9 except as you said 6
>From /dev/nvram you get A+
The lack of day of week is odd but fixable. The struct tm already has a
field for tm_wday (day of week) so we can fill it in. Whether it is
valid is another question.
What do people thing about this ?
Signed-off-by: Alan Cox <[email protected]>
--- drivers/char/rtc.c~ 2005-12-20 23:40:34.912559808 +0000
+++ drivers/char/rtc.c 2005-12-20 23:51:16.428034632 +0000
@@ -46,10 +46,10 @@
* 1.11a Daniele Bellucci: Audit create_proc_read_entry in rtc_init
* 1.12 Venkatesh Pallipadi: Hooks for emulating rtc on HPET base-timer
* CONFIG_HPET_EMULATE_RTC
- *
+ * 1.12ac Alan Cox: Allow read access to the day of week register
*/
-#define RTC_VERSION "1.12"
+#define RTC_VERSION "1.12ac"
#define RTC_IO_EXTENT 0x8
@@ -1250,9 +1250,9 @@
/*
* Only the values that we read from the RTC are set. We leave
- * tm_wday, tm_yday and tm_isdst untouched. Even though the
- * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
- * by the RTC when initially set to a non-zero value.
+ * tm_wday, tm_yday and tm_isdst untouched. Note that while the
+ * RTC has RTC_DAY_OF_WEEK, we should usually ignore it, as it is
+ * only updated by the RTC when initially set to a non-zero value.
*/
spin_lock_irq(&rtc_lock);
rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);
@@ -1261,6 +1261,9 @@
rtc_tm->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);
rtc_tm->tm_mon = CMOS_READ(RTC_MONTH);
rtc_tm->tm_year = CMOS_READ(RTC_YEAR);
+ /* Only set from 2.6.16 onwards */
+ rtc_tm->tm_wday = CMOS_READ(RTC_DAY_OF_WEEK);
+
#ifdef CONFIG_MACH_DECSTATION
real_year = CMOS_READ(RTC_DEC_YEAR);
#endif
@@ -1275,6 +1278,7 @@
BCD_TO_BIN(rtc_tm->tm_mday);
BCD_TO_BIN(rtc_tm->tm_mon);
BCD_TO_BIN(rtc_tm->tm_year);
+ BCD_TO_BIN(rtc_tm->tm_wday);
}
#ifdef CONFIG_MACH_DECSTATION
-
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