genode

mirror of https://github.com/genodelabs/genode.git synced 2025-01-05 21:44:12 +00:00

History

Norman Feske ed9487b452 rtc_drv: defer init until first use This patch avoids the RTC driver's aggressive polling during the (CPU-bounded) boot of Sculpt OS. As the RTC is not needed during bootup, this patch reduces the boot time (on Qemu) by 2-4 seconds. Fixes #4065		2021-04-20 12:03:03 +02:00
..
dummy	rtc_drv: add dummy driver	2021-03-12 12:01:36 +01:00
spec	rtc_drv/x86: code structure	2021-04-20 12:03:03 +02:00
main.cc	rtc_drv: defer init until first use	2021-04-20 12:03:03 +02:00
README	rtc_drv: add dummy driver	2021-03-12 12:01:36 +01:00
rtc.h	rtc_drv: add support for setting RTC	2019-08-13 12:02:03 +02:00
target.inc	os: name rtc_drv unambigously (ref #2190 )	2019-05-16 13:11:01 +02:00

README

The RTC driver component provides access to the CMOS RTC on x86 via
the Rtc session. On base-linux 'gettimeofday' is used.

The component will use the content of the 'set_rtc' ROM if the
'allow_setting_rtc' attribute in the 'config' node is set to 'yes'
to allow setting the RTC. A valid ROM must contain a top node with
the following attributes:

* 'year' (e.g. 2019)
* 'month'  (1 - 12)
* 'day'    (1 - 31)
* 'hour'   (0 - 23)
* 'minute' (0 - 59)
* 'second' (0 - 59)

The same attributes can be set in the configuration node of the driver
to initially set the RTC to the givven value.

The component will always use 24H mode and relies on the BIOS/firmware
to do the right thing regarding the year.