kernel/linux.git/include/linux/rtc.h, branch v5.10.258

rtc: introduce features bitfield

2026-06-01T15:29:41+00:00

[ Upstream commit 7ae41220ef5831674f446baef19bfe1b31358260 ] Introduce a bitfield to allow the drivers to announce the available features for an RTC. The main use case would be to better handle alarms, that could be present or not or have a minute resolution or may need a correct week day to be set. Use the newly introduced RTC_FEATURE_ALARM bit to then test whether alarms are available instead of relying on the presence of ops->set_alarm. Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210110231752.1418816-2-alexandre.belloni@bootlin.com Stable-dep-of: 0fedce7244e4 ("rtc: abx80x: Disable alarm feature if no interrupt attached") Signed-off-by: Sasha Levin

rtc: cleanup obsolete comment about struct rtc_class_ops

2020-07-16T11:35:25+00:00

Commit ea369ea6d828 ("rtc: remove .open() and .release()") removes open/release callback from struct rtc_class_ops. Also commit 80d4bb515b78 ("RTC: Cleanup rtc_class_ops->irq_set_state") and commit 696160fec162 ("RTC: Cleanup rtc_class_ops->irq_set_freq()") removes irq callbacks. So, just remove related comments so that readers will not be confused. Signed-off-by: Misono Tomohiro Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20200710080003.7986-1-misono.tomohiro@jp.fujitsu.com

rtc: remove rtc_time_to_tm and rtc_tm_to_time

2020-04-02T16:47:30+00:00

There are no callers of the 32bit versions of rtc_time conversion functions, drop them. Link: https://lore.kernel.org/r/20200330201510.861217-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni

rtc: rv3029: let the core handle rtc range

2019-12-18T09:38:07+00:00

Despite the comment, the RV3029 uses a 7bit BCD register for the year, making 2079 the last supported year. Link: https://lore.kernel.org/r/20191214221022.622482-14-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni

rtc: introduce lock helpers

2019-10-19T20:55:46+00:00

Introduce rtc_lock and rtc_unlock to shorten the code when locking and unlocking ops_lock from drivers. Link: https://lore.kernel.org/r/20191019205034.6382-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni

rtc: add timestamp for end of 2199

2019-10-19T20:33:07+00:00

Some RTCs handle date up to 2199. Link: https://lore.kernel.org/r/20191016201626.31309-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni

rtc: add a timestamp for year 0

2019-10-07T13:49:22+00:00

A few RTCs handle dates from year 0 to year 9999. Add a timestamp even if years before 1970 will probably never be used. Link: https://lore.kernel.org/r/20191007134724.15505-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni

rtc: drop set_mms and set_mmss64

2019-05-08T20:14:36+00:00

There are no users of set_mms and set_mmss64 as they have all been converted to set_time and are handling the tm to time conversion on their own. Signed-off-by: Alexandre Belloni

rtc: Fix timestamp value for RTC_TIMESTAMP_BEGIN_1900

2019-04-04T08:07:10+00:00

Printing "mktime64(1900, 1, 1, 0, 0, 0)" gives -2208988800. Fixes: 83bbc5ac63326433 ("rtc: Add useful timestamp definitions") Signed-off-by: Geert Uytterhoeven Signed-off-by: Alexandre Belloni

rtc: da9063: set range

2019-04-04T08:07:10+00:00

The DA9062 and DA9063 have a year register that can go up to 0x3F. Acked-by: Steve Twiss Signed-off-by: Alexandre Belloni