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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* TI INA3221 Current/Power monitor driver.
*/
#ifndef __CROS_EC_INA3221_H
#define __CROS_EC_INA3221_H
#define INA3221_REG_CONFIG 0x00
#define INA3221_REG_MASK 0x0F
/*
* Common bits are:
* Reset
* average = 1
* conversion time = 1.1 ms
* mode = shunt and bus, continuous.
*/
#define INA3221_CONFIG_BASE 0x8127
/* Bus voltage: lower 3 bits clear, LSB = 8 mV */
#define INA3221_BUS_MV(reg) (reg)
/* Shunt voltage: lower 3 bits clear, LSB = 40 uV */
#define INA3221_SHUNT_UV(reg) ((reg) * (40/8))
enum ina3221_channel {
INA3221_CHAN_1 = 0,
INA3221_CHAN_2 = 1,
INA3221_CHAN_3 = 2,
INA3221_CHAN_COUNT = 3
};
/* Registers for each channel */
enum ina3221_register {
INA3221_SHUNT_VOLT = 0,
INA3221_BUS_VOLT = 1,
INA3221_CRITICAL = 2,
INA3221_WARNING = 3,
INA3221_MAX_REG = 4
};
/* Configuration table - defined in board file. */
struct ina3221_t {
int port; /* I2C port index */
uint8_t address; /* I2C address */
const char *name[INA3221_CHAN_COUNT]; /* Channel names */
};
/* External config in board file */
extern const struct ina3221_t ina3221[];
extern const unsigned int ina3221_count;
#endif /* __CROS_EC_INA3221_H */
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