linux-imx

/*

 * Driver for Texas Instruments INA219, INA226 power monitor chips

 *

 * INA219:

 * Zero Drift Bi-Directional Current/Power Monitor with I2C Interface

 * Datasheet: http://www.ti.com/product/ina219

 *

 * INA220:

 * Bi-Directional Current/Power Monitor with I2C Interface

 * Datasheet: http://www.ti.com/product/ina220

 *

 * INA226:

 * Bi-Directional Current/Power Monitor with I2C Interface

 * Datasheet: http://www.ti.com/product/ina226

 *

 * INA230:

 * Bi-directional Current/Power Monitor with I2C Interface

 * Datasheet: http://www.ti.com/product/ina230

 *

 * Copyright (C) 2012 Lothar Felten <lothar.felten@gmail.com>

 * Thanks to Jan Volkering

 *

 * 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.

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/jiffies.h>

#include <linux/of_device.h>

#include <linux/of.h>

#include <linux/delay.h>

#include <linux/util_macros.h>

#include <linux/regmap.h>

​

#include <linux/platform_data/ina2xx.h>

​

/* common register definitions */

#define INA2XX_CONFIG           0x00

#define INA2XX_SHUNT_VOLTAGE        0x01 /* readonly */

#define INA2XX_BUS_VOLTAGE      0x02 /* readonly */

#define INA2XX_POWER            0x03 /* readonly */

#define INA2XX_CURRENT          0x04 /* readonly */

#define INA2XX_CALIBRATION      0x05

​

/* INA226 register definitions */

#define INA226_MASK_ENABLE      0x06

#define INA226_ALERT_LIMIT      0x07

#define INA226_DIE_ID           0xFF

​

/* register count */

#define INA219_REGISTERS        6

#define INA226_REGISTERS        8

​

#define INA2XX_MAX_REGISTERS        8

​