Commit graph

15 commits

Author SHA1 Message Date
Simon Glass
dbeda5b225 dm: rtc: Add a uclass for real-time clocks
Add a uclass for real-time clocks which support getting the current time,
setting it and resetting the chip to a known-working state. Some RTCs have
additional registers which can be used to store settings, so also provide
an interface to these.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-05-05 20:58:39 -06:00
Simon Glass
aac5119822 dm: rtc: Split structure definition into its own file
Move the definition of struct rtc_time into a separate file so that sandbox
can include it without requiring common.h and the like.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-05-05 20:58:20 -06:00
Simon Glass
714209832d dm: rtc: Rename mktime() and reduce the number of parameters
Most callers unpack the structure and pass each member. It seems better to
pass the whole structure instead, as with the C library. Also add an rtc_
prefix.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-05-05 20:58:20 -06:00
Simon Glass
9f9276c34c dm: rtc: Rename to_tm() to rtc_to_tm() and add error code
Rename this function so that it is clear that it is provided by the RTC.
Also return an error when it cannot function as expected. This is unlikely
to occur since it works for dates since 1752 and many RTCs do not support
such old dates. Still it is better to be accurate.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-05-05 20:58:20 -06:00
Simon Glass
199e87c340 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>
2015-05-05 20:58:20 -06:00
Simon Glass
fc4860c089 x86: rtc: mc146818: Add helpers to read/write CMOS RAM
On x86 we use CMOS RAM to read and write some settings. Add basic support
for this, including access to registers 128-255.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-24 06:13:44 -07:00
Simon Glass
c6577f7219 rtc: mc146818: Set up RTC at start of day
Provide a function to set up the RTC ready for use.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2014-11-25 06:33:59 -07:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Albin Tonnerre
885fc78c28 Switch from per-driver to common definition of bin2bcd and bcd2bin
Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Acked-by: Stefan Roese <sr@denx.de>
2009-08-25 12:57:55 +02:00
Kim Phillips
c2eb8be7f7 rtc: remove broken rtc_read and rtc_write declarations
commit 04e11cf3 "rtc: add support for 4543 RTC (manufactured by e.g.
EPSON)" introduces the following build error on boards configuring e.g,
the ds1374 rtc:

Configuring for MPC837XEMDS board...
ds1374.c:103: error: static declaration of 'rtc_read' follows non-static declaration
/home/r1aaha/git/u-boot/include/rtc.h:64: error: previous declaration of 'rtc_read' was here
ds1374.c:104: error: conflicting types for 'rtc_write'
/home/r1aaha/git/u-boot/include/rtc.h:65: error: previous declaration of 'rtc_write' was here

this reverts the erroneous chunk.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: Detlev Zundel <dzu@denx.de>
CC: Detlev Zundel <dzu@denx.de>
CC: Andreas Pfefferle <ap@denx.de>
2009-04-01 22:34:37 +02:00
Detlev Zundel
04e11cf383 rtc: add support for 4543 RTC (manufactured by e.g. EPSON)
Signed-off-by: Detlev Zundel <dzu@denx.de>
Signed-off-by: Andreas Pfefferle <ap@denx.de>
2009-03-30 09:39:46 +02:00
Jean-Christophe PLAGNIOL-VILLARD
d1e2319414 rtc: allow rtc_set to return an error and use it in cmd_date
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-09-07 00:56:36 +02:00
Wolfgang Denk
53677ef18e Big white-space cleanup.
This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).

Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-05-21 00:14:08 +02:00
Yuri Tikhonov
b73a19e160 LWMON5: POST RTC fix
Modify the RTC API to provide one a status for the time reported by
the rtc_get() function:
  0 - a reliable time is guaranteed,
< 0 - a reliable time isn't guaranteed (power fault, clock issues,
      and so on).

The RTC chip drivers are responsible for providing this info if the
corresponding chip supports such functionality. If not - always
report that the time is reliable.

The POST RTC test was modified to detect the RTC faults utilizing
this new rtc_get() feature.

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
2008-03-20 21:48:46 +01:00
wdenk
a6840a6ede Initial revision 2001-04-09 21:43:07 +00:00