linux-imx

/*

 * INA3221 Triple Current/Voltage Monitor

 *

 * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/

 *  Andrew F. Davis <afd@ti.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * 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.

 */

​

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/of.h>

#include <linux/pm_runtime.h>

#include <linux/regmap.h>

​

#define INA3221_DRIVER_NAME     "ina3221"

​

#define INA3221_CONFIG          0x00

#define INA3221_SHUNT1          0x01

#define INA3221_BUS1            0x02

#define INA3221_SHUNT2          0x03

#define INA3221_BUS2            0x04

#define INA3221_SHUNT3          0x05

#define INA3221_BUS3            0x06

#define INA3221_CRIT1           0x07

#define INA3221_WARN1           0x08

#define INA3221_CRIT2           0x09

#define INA3221_WARN2           0x0a

#define INA3221_CRIT3           0x0b

#define INA3221_WARN3           0x0c

#define INA3221_MASK_ENABLE     0x0f

​

#define INA3221_CONFIG_MODE_MASK    GENMASK(2, 0)

#define INA3221_CONFIG_MODE_POWERDOWN   0

#define INA3221_CONFIG_MODE_SHUNT   BIT(0)

#define INA3221_CONFIG_MODE_BUS     BIT(1)

#define INA3221_CONFIG_MODE_CONTINUOUS  BIT(2)

#define INA3221_CONFIG_VSH_CT_SHIFT 3

#define INA3221_CONFIG_VSH_CT_MASK  GENMASK(5, 3)

#define INA3221_CONFIG_VSH_CT(x)    (((x) & GENMASK(5, 3)) >> 3)

#define INA3221_CONFIG_VBUS_CT_SHIFT    6

#define INA3221_CONFIG_VBUS_CT_MASK GENMASK(8, 6)

#define INA3221_CONFIG_VBUS_CT(x)   (((x) & GENMASK(8, 6)) >> 6)

#define INA3221_CONFIG_CHs_EN_MASK  GENMASK(14, 12)

#define INA3221_CONFIG_CHx_EN(x)    BIT(14 - (x))

​

#define INA3221_CONFIG_DEFAULT      0x7127

#define INA3221_RSHUNT_DEFAULT      10000

​

enum ina3221_fields {

    /* Configuration */

    F_RST,

​

    /* Status Flags */

    F_CVRF,

​

    /* Alert Flags */

    F_WF3, F_WF2, F_WF1,

    F_CF3, F_CF2, F_CF1,

​

    /* sentinel */

    F_MAX_FIELDS

};

​

static const struct reg_field ina3221_reg_fields[] = {

    [F_RST] = REG_FIELD(INA3221_CONFIG, 15, 15),

​

    [F_CVRF] = REG_FIELD(INA3221_MASK_ENABLE, 0, 0),

    [F_WF3] = REG_FIELD(INA3221_MASK_ENABLE, 3, 3),

    [F_WF2] = REG_FIELD(INA3221_MASK_ENABLE, 4, 4),

    [F_WF1] = REG_FIELD(INA3221_MASK_ENABLE, 5, 5),

    [F_CF3] = REG_FIELD(INA3221_MASK_ENABLE, 7, 7),

    [F_CF2] = REG_FIELD(INA3221_MASK_ENABLE, 8, 8),

    [F_CF1] = REG_FIELD(INA3221_MASK_ENABLE, 9, 9),

};

​

enum ina3221_channels {

    INA3221_CHANNEL1,

    INA3221_CHANNEL2,

    INA3221_CHANNEL3,

    INA3221_NUM_CHANNELS

};