diff options
| author | Werner Zeh <werner.zeh@siemens.com> | 2022-08-26 13:40:47 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-09-07 09:23:27 +0000 |
| commit | 5fb66adc323cba3f23cd668d6d2d1cb586724f0e (patch) | |
| tree | c98e1e74769e717b652b40577cfd738c60eaea4c /src/drivers/i2c/rv3028c7/rv3028c7.h | |
| parent | 2c789782add9cfb85026212cd5f8b2cda288c7be (diff) | |
drivers/i2c: Add a new RTC RV-3028-C7 from Micro Crystal
This patch adds a driver for a new RTC from Micro Crystal. Supported
features are:
* configure backup voltage switchover via devicetree
* configure backup capacitor charging mode via devicetree
* set date if a voltage drop on backup voltage was detected
to either a user definable (devicetree) or coreboot build date
Change-Id: I37176ea726e50e4e74d409488981d7618ecff8bb
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Diffstat (limited to 'src/drivers/i2c/rv3028c7/rv3028c7.h')
| -rw-r--r-- | src/drivers/i2c/rv3028c7/rv3028c7.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/drivers/i2c/rv3028c7/rv3028c7.h b/src/drivers/i2c/rv3028c7/rv3028c7.h new file mode 100644 index 0000000000..55617a724f --- /dev/null +++ b/src/drivers/i2c/rv3028c7/rv3028c7.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef _I2C_RV3028C7_H_ +#define _I2C_RV3028C7_H_ + +/* Register layout */ +#define SECOND_REG 0x00 +#define MINUTE_REG 0x01 +#define HOUR_REG 0x02 +#define WEEK_REG 0x03 +#define DAY_REG 0x04 +#define MONTH_REG 0x05 +#define YEAR_REG 0x06 +#define STATUS_REG 0x0e +#define PORF_BIT (1 << 0) +#define EE_BUSY_BIT (1 << 7) +#define CTRL1_REG 0x0f +#define EERD_BIT (1 << 3) +#define CTRL2_REG 0x10 +#define HOUR_12_24_BIT (1 << 1) +/* Registers for the internal EEPROM */ +#define EEP_ADR_REG 0x25 +#define EEP_DATA_REG 0x26 +#define EEP_CMD_REG 0x27 +#define EEP_CMD_PREFIX 0x00 +#define EEP_CMD_UPDATE 0x11 +#define EEP_BACKUP_REG 0x37 +#define FEDE_BIT (1 << 4) +#define BSM_BIT 2 +#define BSM_MASK (3 << BSM_BIT) +#define TCR_BIT 0 +#define TCR_MASK (3 << TCR_BIT) +#define TCE_BIT (1 << 5) + +#define EEP_REFRESH_EN 1 +#define EEP_REFRESH_DIS 0 + +/* The longest mentioned timeout in the datasheet is 63 ms, + round up to 70 ms to be on the safe side. */ +#define EEP_SYNC_TIMEOUT_MS 70 + +#endif /* _I2C_RV3028C7_H_ */ |