linux-imx

/*

 * Driver for the Texas Instruments / Burr Brown INA209

 * Bidirectional Current/Power Monitor

 *

 * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net>

 *

 * Derived from Ira W. Snyder's original driver submission

 *  Copyright (C) 2008 Paul Hays <Paul.Hays@cattail.ca>

 *  Copyright (C) 2008-2009 Ira W. Snyder <iws@ovro.caltech.edu>

 *

 * Aligned with ina2xx driver

 *  Copyright (C) 2012 Lothar Felten <l-felten@ti.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.

 *

 * Datasheet:

 * http://www.ti.com/lit/gpn/ina209

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/bug.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

​

#include <linux/platform_data/ina2xx.h>

​

/* register definitions */

#define INA209_CONFIGURATION        0x00

#define INA209_STATUS           0x01

#define INA209_STATUS_MASK      0x02

#define INA209_SHUNT_VOLTAGE        0x03

#define INA209_BUS_VOLTAGE      0x04

#define INA209_POWER            0x05

#define INA209_CURRENT          0x06

#define INA209_SHUNT_VOLTAGE_POS_PEAK   0x07

#define INA209_SHUNT_VOLTAGE_NEG_PEAK   0x08

#define INA209_BUS_VOLTAGE_MAX_PEAK 0x09

#define INA209_BUS_VOLTAGE_MIN_PEAK 0x0a

#define INA209_POWER_PEAK       0x0b

#define INA209_SHUNT_VOLTAGE_POS_WARN   0x0c

#define INA209_SHUNT_VOLTAGE_NEG_WARN   0x0d

#define INA209_POWER_WARN       0x0e

#define INA209_BUS_VOLTAGE_OVER_WARN    0x0f

#define INA209_BUS_VOLTAGE_UNDER_WARN   0x10

#define INA209_POWER_OVER_LIMIT     0x11

#define INA209_BUS_VOLTAGE_OVER_LIMIT   0x12

#define INA209_BUS_VOLTAGE_UNDER_LIMIT  0x13

#define INA209_CRITICAL_DAC_POS     0x14

#define INA209_CRITICAL_DAC_NEG     0x15

#define INA209_CALIBRATION      0x16

​

#define INA209_REGISTERS        0x17

​

#define INA209_CONFIG_DEFAULT       0x3c47  /* PGA=8, full range */

#define INA209_SHUNT_DEFAULT        10000   /* uOhm */