diff options
Diffstat (limited to 'src/soc/intel/common/block/rtc/rtc.c')
-rw-r--r-- | src/soc/intel/common/block/rtc/rtc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/rtc/rtc.c b/src/soc/intel/common/block/rtc/rtc.c new file mode 100644 index 0000000000..ea9987074b --- /dev/null +++ b/src/soc/intel/common/block/rtc/rtc.c @@ -0,0 +1,31 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2017 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <soc/pcr_ids.h> +#include <intelblocks/pcr.h> +#include <intelblocks/rtc.h> + +/* RTC PCR configuration */ +#define PCR_RTC_CONF 0x3400 +#define PCR_RTC_CONF_UCMOS_EN (1 << 2) +#define PCR_RTC_CONF_LCMOS_LOCK (1 << 3) +#define PCR_RTC_CONF_UCMOS_LOCK (1 << 4) +#define PCR_RTC_CONF_RESERVED (1 << 31) + +void enable_rtc_upper_bank(void) +{ + /* Enable upper 128 bytes of CMOS */ + pcr_or32(PID_RTC, PCR_RTC_CONF, PCR_RTC_CONF_UCMOS_EN); +} |