linux-imx

/*

 * adm1031.c - Part of lm_sensors, Linux kernel modules for hardware

 *         monitoring

 * Based on lm75.c and lm85.c

 * Supports adm1030 / adm1031

 * Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>

 * Reworked by Jean Delvare <jdelvare@suse.de>

 *

 * 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/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/i2c.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>

​

/* Following macros takes channel parameter starting from 0 to 2 */

#define ADM1031_REG_FAN_SPEED(nr)   (0x08 + (nr))

#define ADM1031_REG_FAN_DIV(nr)     (0x20 + (nr))

#define ADM1031_REG_PWM         (0x22)

#define ADM1031_REG_FAN_MIN(nr)     (0x10 + (nr))

#define ADM1031_REG_FAN_FILTER      (0x23)

​

#define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr))

#define ADM1031_REG_TEMP_MAX(nr)    (0x14 + 4 * (nr))

#define ADM1031_REG_TEMP_MIN(nr)    (0x15 + 4 * (nr))

#define ADM1031_REG_TEMP_CRIT(nr)   (0x16 + 4 * (nr))

​

#define ADM1031_REG_TEMP(nr)        (0x0a + (nr))

#define ADM1031_REG_AUTO_TEMP(nr)   (0x24 + (nr))

​

#define ADM1031_REG_STATUS(nr)      (0x2 + (nr))

​

#define ADM1031_REG_CONF1       0x00

#define ADM1031_REG_CONF2       0x01

#define ADM1031_REG_EXT_TEMP        0x06

​

#define ADM1031_CONF1_MONITOR_ENABLE    0x01    /* Monitoring enable */

#define ADM1031_CONF1_PWM_INVERT    0x08    /* PWM Invert */

#define ADM1031_CONF1_AUTO_MODE     0x80    /* Auto FAN */

​

#define ADM1031_CONF2_PWM1_ENABLE   0x01

#define ADM1031_CONF2_PWM2_ENABLE   0x02

#define ADM1031_CONF2_TACH1_ENABLE  0x04

#define ADM1031_CONF2_TACH2_ENABLE  0x08

#define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))

​

#define ADM1031_UPDATE_RATE_MASK    0x1c

#define ADM1031_UPDATE_RATE_SHIFT   2

​

/* Addresses to scan */

static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

​

enum chips { adm1030, adm1031 };

​

typedef u8 auto_chan_table_t[8][2];

​

/* Each client has this additional data */

struct adm1031_data {

    struct i2c_client *client;

    const struct attribute_group *groups[3];

    struct mutex update_lock;

    int chip_type;

    char valid;     /* !=0 if following fields are valid */

    unsigned long last_updated; /* In jiffies */

    unsigned int update_interval;   /* In milliseconds */

    /*

     * The chan_select_table contains the possible configurations for

     * auto fan control.

     */

    const auto_chan_table_t *chan_select_table;

    u16 alarm;

    u8 conf1;

    u8 conf2;

    u8 fan[2];