linux-imx

/*

 * Hardware monitoring driver for Maxim MAX16064

 *

 * 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/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include "pmbus.h"

​

#define MAX16064_MFR_VOUT_PEAK      0xd4

#define MAX16064_MFR_TEMPERATURE_PEAK   0xd6

​

static int max16064_read_word_data(struct i2c_client *client, int page, int reg)

{

    int ret;

​

    switch (reg) {

    case PMBUS_VIRT_READ_VOUT_MAX:

        ret = pmbus_read_word_data(client, page,

                       MAX16064_MFR_VOUT_PEAK);

        break;

    case PMBUS_VIRT_READ_TEMP_MAX:

        ret = pmbus_read_word_data(client, page,

                       MAX16064_MFR_TEMPERATURE_PEAK);

        break;

    case PMBUS_VIRT_RESET_VOUT_HISTORY:

    case PMBUS_VIRT_RESET_TEMP_HISTORY:

        ret = 0;

        break;

    default:

        ret = -ENODATA;

        break;

    }

    return ret;

}

​

static int max16064_write_word_data(struct i2c_client *client, int page,

                    int reg, u16 word)

{

    int ret;

​

    switch (reg) {

    case PMBUS_VIRT_RESET_VOUT_HISTORY:

        ret = pmbus_write_word_data(client, page,

                        MAX16064_MFR_VOUT_PEAK, 0);

        break;

    case PMBUS_VIRT_RESET_TEMP_HISTORY:

        ret = pmbus_write_word_data(client, page,

                        MAX16064_MFR_TEMPERATURE_PEAK,

                        0xffff);

        break;

    default:

        ret = -ENODATA;

        break;

    }

    return ret;

}

​

static struct pmbus_driver_info max16064_info = {

    .pages = 4,

    .format[PSC_VOLTAGE_IN] = direct,

    .format[PSC_VOLTAGE_OUT] = direct,

    .format[PSC_TEMPERATURE] = direct,

    .m[PSC_VOLTAGE_IN] = 19995,

    .b[PSC_VOLTAGE_IN] = 0,

    .R[PSC_VOLTAGE_IN] = -1,

    .m[PSC_VOLTAGE_OUT] = 19995,

    .b[PSC_VOLTAGE_OUT] = 0,

    .R[PSC_VOLTAGE_OUT] = -1,

    .m[PSC_TEMPERATURE] = -7612,

    .b[PSC_TEMPERATURE] = 335,

    .R[PSC_TEMPERATURE] = -3,

    .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP

        | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP,