linux-imx

/*

 * Hardware monitoring driver for Maxim MAX8688

 *

 * Copyright (c) 2011 Ericsson AB.

 *

 * 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; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

​

#include <linux/bitops.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include "pmbus.h"

​

#define MAX8688_MFR_VOUT_PEAK       0xd4

#define MAX8688_MFR_IOUT_PEAK       0xd5

#define MAX8688_MFR_TEMPERATURE_PEAK    0xd6

#define MAX8688_MFG_STATUS      0xd8

​

#define MAX8688_STATUS_OC_FAULT     BIT(4)

#define MAX8688_STATUS_OV_FAULT     BIT(5)

#define MAX8688_STATUS_OV_WARNING   BIT(8)

#define MAX8688_STATUS_UV_FAULT     BIT(9)

#define MAX8688_STATUS_UV_WARNING   BIT(10)

#define MAX8688_STATUS_UC_FAULT     BIT(11)

#define MAX8688_STATUS_OC_WARNING   BIT(12)

#define MAX8688_STATUS_OT_FAULT     BIT(13)

#define MAX8688_STATUS_OT_WARNING   BIT(14)

​

static int max8688_read_word_data(struct i2c_client *client, int page, int reg)

{

    int ret;

​

    if (page > 0)

        return -ENXIO;

​

    switch (reg) {

    case PMBUS_VIRT_READ_VOUT_MAX:

        ret = pmbus_read_word_data(client, 0, MAX8688_MFR_VOUT_PEAK);

        break;

    case PMBUS_VIRT_READ_IOUT_MAX:

        ret = pmbus_read_word_data(client, 0, MAX8688_MFR_IOUT_PEAK);

        break;

    case PMBUS_VIRT_READ_TEMP_MAX:

        ret = pmbus_read_word_data(client, 0,

                       MAX8688_MFR_TEMPERATURE_PEAK);

        break;

    case PMBUS_VIRT_RESET_VOUT_HISTORY:

    case PMBUS_VIRT_RESET_IOUT_HISTORY: