lib: Add real-time-clock functions

Add functions to convert between seconds and a struct rtc_time. Also
add a function that can display the time on the console.

BUG=chrome-os-partner:52220
BRANCH=none
TEST=(partial) with future commits and after setting RTC on the EC:
boot on gru into linux shell, check firmware log:

localhost ~ # grep Date: /sys/firmware/log
Date: 2016-06-20 (Monday)  Time: 18:01:44

Then reboot ~10 seconds and check again:

localhost ~ # grep Date: /sys/firmware/log
Date: 2016-06-20 (Monday)  Time: 18:01:54

Change-Id: Id148ccb7a18a05865b903307358666ff6c7b4a3d
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 3b02dbcd7d9023ce0acabebcf904e70007428d27
Original-Change-Id: I344c385e2e4cb995d3a374025c205f01c38b660d
Original-Signed-off-by: Simon Glass <sjg@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/351782
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/15301
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Simon Glass
2016-06-10 20:58:24 -06:00
committed by Martin Roth
parent 9482cf6c09
commit 2cf99e1655
3 changed files with 161 additions and 0 deletions

View File

@@ -79,6 +79,7 @@ ramstage-$(CONFIG_PRIMITIVE_MEMTEST) += primitive_memtest.c
romstage-$(CONFIG_CACHE_AS_RAM) += ramtest.c
romstage-$(CONFIG_GENERIC_GPIO_LIB) += gpio.c
romstage-y += stack.c
ramstage-y += rtc.c
ifeq ($(CONFIG_EARLY_CBMEM_INIT),y)
romstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c