linux-imx

/*

 * emc1403.c - SMSC Thermal Driver

 *

 * Copyright (C) 2008 Intel Corp

 *

 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 *

 * 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.

 *

 * 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.,

 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 */

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/sysfs.h>

#include <linux/mutex.h>

#include <linux/regmap.h>

​

#define THERMAL_PID_REG     0xfd

#define THERMAL_SMSC_ID_REG 0xfe

#define THERMAL_REVISION_REG    0xff

​

enum emc1403_chip { emc1402, emc1403, emc1404 };

​

struct thermal_data {

    struct regmap *regmap;

    struct mutex mutex;

    const struct attribute_group *groups[4];

};

​

static ssize_t temp_show(struct device *dev, struct device_attribute *attr,

             char *buf)

{

    struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);

    struct thermal_data *data = dev_get_drvdata(dev);

    unsigned int val;

    int retval;

​

    retval = regmap_read(data->regmap, sda->index, &val);

    if (retval < 0)

        return retval;

    return sprintf(buf, "%d000\n", val);

}

​

static ssize_t bit_show(struct device *dev, struct device_attribute *attr,

            char *buf)

{

    struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);