| /* Copyright (c) 2014 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 INA231 Current/Power monitor driver. |
| */ |
| |
| #ifndef INA231_H |
| #define INA231_H |
| |
| #define INA231_REG_CONFIG 0x00 |
| #define INA231_REG_SHUNT_VOLT 0x01 |
| #define INA231_REG_BUS_VOLT 0x02 |
| #define INA231_REG_POWER 0x03 |
| #define INA231_REG_CURRENT 0x04 |
| #define INA231_REG_CALIB 0x05 |
| #define INA231_REG_MASK 0x06 |
| #define INA231_REG_ALERT 0x07 |
| |
| #define INA231_CONFIG_MODE_MASK (7 << 0) |
| #define INA231_CONFIG_MODE_PWRDWN (0 << 0) |
| #define INA231_CONFIG_MODE_SHUNT (1 << 0) |
| #define INA231_CONFIG_MODE_BUS (1 << 1) |
| #define INA231_CONFIG_MODE_TRG (0 << 2) |
| #define INA231_CONFIG_MODE_CONT (1 << 2) |
| |
| /* Conversion time for bus and shunt in micro-seconds */ |
| enum ina231_conv_time { |
| INA231_CONV_TIME_140 = 0x00, |
| INA231_CONV_TIME_204 = 0x01, |
| INA231_CONV_TIME_332 = 0x02, |
| INA231_CONV_TIME_588 = 0x03, |
| INA231_CONV_TIME_1100 = 0x04, |
| INA231_CONV_TIME_2116 = 0x05, |
| INA231_CONV_TIME_4156 = 0x06, |
| INA231_CONV_TIME_8244 = 0x07, |
| }; |
| #define INA231_CONV_TIME_MASK 0x7 |
| #define INA231_CONFIG_SHUNT_CONV_TIME(t) ((t) << 3) |
| #define INA231_CONFIG_BUS_CONV_TIME(t) ((t) << 6) |
| |
| #define INA231_CONFIG_AVG_1 (0 << 9) |
| #define INA231_CONFIG_AVG_4 (1 << 9) |
| #define INA231_CONFIG_AVG_16 (2 << 9) |
| #define INA231_CONFIG_AVG_64 (3 << 9) |
| #define INA231_CONFIG_AVG_128 (4 << 9) |
| #define INA231_CONFIG_AVG_256 (5 << 9) |
| #define INA231_CONFIG_AVG_512 (6 << 9) |
| #define INA231_CONFIG_AVG_1024 (7 << 9) |
| |
| #define INA231_MASK_EN_LEN (1 << 0) |
| #define INA231_MASK_EN_APOL (1 << 1) |
| #define INA231_MASK_EN_OVF (1 << 2) |
| #define INA231_MASK_EN_CVRF (1 << 3) |
| #define INA231_MASK_EN_AFF (1 << 4) |
| #define INA231_MASK_EN_CNVR (1 << 10) |
| #define INA231_MASK_EN_POL (1 << 11) |
| #define INA231_MASK_EN_BUL (1 << 12) |
| #define INA231_MASK_EN_BOL (1 << 13) |
| #define INA231_MASK_EN_SUL (1 << 14) |
| #define INA231_MASK_EN_SOL (1 << 15) |
| |
| /* Calibration value to get current LSB = 1mA */ |
| #define INA231_CALIB_1MA(rsense_mohm) (5120/(rsense_mohm)) |
| |
| /* Bus voltage LSB : 1.25mV / bit */ |
| #define INA231_BUS_MV(reg) ((reg) * 125 / 100) |
| |
| /* Power LSB : 25mW / current_lsb */ |
| #define INA231_POW_MW(reg) ((reg) * 25 * 1/*Current mA/LSB*/) |
| |
| /* Read INA231 register. */ |
| uint16_t ina231_read(uint8_t idx, uint8_t reg); |
| |
| /* Write INA231 register. */ |
| int ina231_write(uint8_t idx, uint8_t reg, uint16_t val); |
| |
| /* Set measurement parameters */ |
| int ina231_init(uint8_t idx, uint16_t config, uint16_t calib); |
| |
| /* Return bus voltage in milliVolts */ |
| int ina231_get_voltage(uint8_t idx); |
| |
| /* Return current in milliAmps */ |
| int ina231_get_current(uint8_t idx); |
| |
| /* Return power in milliWatts */ |
| int ina231_get_power(uint8_t idx); |
| |
| #endif /* INA231_H */ |
