diff options
| author | Patrick Rudolph <siro@das-labor.org> | 2017-02-25 09:56:53 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-09 08:14:04 +0000 |
| commit | 9f3e734e5c3760ff30906862a3f9ca724ea5fffb (patch) | |
| tree | c3db88f9bdaa03ee1783976f4c46cca699643c90 /payloads/libpayload/include | |
| parent | ef613b97cf03d764f2894e314c65282589af55b3 (diff) | |
libpayload: Improve rtc functions
On Lenovo T500 the RTC readings where wrong, as RTC has
different encodings, depending on the statusB register.
Support BCD vs binary RTC format and AM/PM vs 24h RTC format.
Fixes wrong date and time on Lenovo 500.
Change-Id: Id773c33e228973e190a7e14c3d11979678b1a619
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/18498
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'payloads/libpayload/include')
| -rw-r--r-- | payloads/libpayload/include/libpayload.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h index 4b6a250f28..74969726bf 100644 --- a/payloads/libpayload/include/libpayload.h +++ b/payloads/libpayload/include/libpayload.h @@ -130,6 +130,9 @@ static const char _pstruct(key)[] \ #define NVRAM_RTC_YEAR 9 /**< RTC Year offset in CMOS */ #define NVRAM_RTC_FREQ_SELECT 10 /**< RTC Update Status Register */ #define NVRAM_RTC_UIP 0x80 +#define NVRAM_RTC_STATUSB 11 /**< RTC Status Register B */ +#define NVRAM_RTC_FORMAT_24HOUR 0x02 +#define NVRAM_RTC_FORMAT_BINARY 0x04 /** Broken down time structure */ struct tm { |