diff options
| author | Mario Scheithauer <mario.scheithauer@siemens.com> | 2017-05-08 16:09:26 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2017-05-11 16:46:16 +0200 |
| commit | 7fd20beaf81455cc29271283426e25e722b90fe1 (patch) | |
| tree | c45ed3aa1a27021cbf4c7c979a1ddda812d670f5 /src/drivers/i2c/rx6110sa/rx6110sa.h | |
| parent | a5fcc2e42776b94c5dbb281589d49a84db601f4e (diff) | |
drivers/i2c: Add new driver for RTC type RX6110 SA
This driver enables the usage of the external RTC chip RX6110 SA
(http://www5.epsondevice.com/en/products/i2c/rx6110sab.html) which is
connected to the I2C bus. The I2C address of this device is fixed. One
can change parameters in the device tree so that the used setup can be
adapted to match the configuration of the device on the mainboard.
Change-Id: I1290a10c2d5ad76a317c99c8b92a013309a605d6
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/19625
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Diffstat (limited to 'src/drivers/i2c/rx6110sa/rx6110sa.h')
| -rw-r--r-- | src/drivers/i2c/rx6110sa/rx6110sa.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/drivers/i2c/rx6110sa/rx6110sa.h b/src/drivers/i2c/rx6110sa/rx6110sa.h new file mode 100644 index 0000000000..99527e0420 --- /dev/null +++ b/src/drivers/i2c/rx6110sa/rx6110sa.h @@ -0,0 +1,59 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2017 Siemens AG + * + * 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. + */ + +#ifndef _I2C_RX6110SA_H_ +#define _I2C_RX6110SA_H_ + +/* The address of this RTC is fixed. */ +#define RX6110SA_SLAVE_ADR 0x32 +#define RX6110SA_I2C_CONTROLLER 0 + +/* Register layout */ +#define SECOND_REG 0x10 +#define MINUTE_REG 0x11 +#define HOUR_REG 0x12 +#define WEEK_REG 0x13 +#define DAY_REG 0x14 +#define MONTH_REG 0x15 +#define YEAR_REG 0x16 +#define RESERVED_BIT_REG 0x17 +#define RTC_INIT_VALUE 0x28 +#define ALARM_MINUTE_REG 0x18 +#define ALARM_HOUR_REG 0x19 +#define ALARM_WEEKDAY_REG 0x1A +#define TMR_COUNTER_0_REG 0x1B +#define TMR_COUNTER_1_REG 0x1C +#define EXTENSION_REG 0x1D +#define TE_BIT (1 << 4) +#define FSEL_MASK 0xC0 +#define FLAG_REGISTER 0x1E +#define VLF_BIT (1 << 1) +#define CTRL_REG 0x1F +#define AIE_BIT (1 << 3) +#define TIE_BIT (1 << 4) +#define UIE_BIT (1 << 5) +#define STOP_BIT (1 << 6) +#define TEST_BIT (1 << 7) +#define DIGITAL_REG 0x30 +#define BATTERY_BACKUP_REG 0x31 +#define IRQ_CONTROL_REG 0x32 + +/* Define CLKOUT frequency divider values valid for parameter cof_selection */ +#define COF_OFF 0x00 +#define COF_1_HZ 0x01 +#define COF_1024_HZ 0x02 +#define COF_32768_HZ 0x03 + +#endif /* _I2C_RX6110SA_H_ */ |