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gl518sm.c

/*
 * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware
 *             monitoring
 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
 * Kyosti Malkki <kmalkki@cc.hut.fi>
 * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and
 * Jean Delvare <khali@linux-fr.org>
 *
 * 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.
 *
 * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
 * and advice of Greg Kroah-Hartman.
 *
 * Notes about the port:
 * Release 0x00 of the GL518SM chipset doesn't support reading of in0,
 * in1 nor in2. The original driver had an ugly workaround to get them
 * anyway (changing limits and watching alarms trigger and wear off).
 * We did not keep that part of the original driver in the Linux 2.6
 * version, since it was making the driver significantly more complex
 * with no real benefit.
 *
 * History:
 * 2004-01-28  Original port. (Hong-Gunn Chew)
 * 2004-01-31  Code review and approval. (Jean Delvare)
 */

#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/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>

/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80);

/* Many GL518 constants specified below */

/* The GL518 registers */
#define GL518_REG_CHIP_ID     0x00
#define GL518_REG_REVISION    0x01
#define GL518_REG_VENDOR_ID   0x02
#define GL518_REG_CONF        0x03
#define GL518_REG_TEMP_IN     0x04
#define GL518_REG_TEMP_MAX    0x05
#define GL518_REG_TEMP_HYST   0x06
#define GL518_REG_FAN_COUNT   0x07
#define GL518_REG_FAN_LIMIT   0x08
#define GL518_REG_VIN1_LIMIT  0x09
#define GL518_REG_VIN2_LIMIT  0x0a
#define GL518_REG_VIN3_LIMIT  0x0b
#define GL518_REG_VDD_LIMIT   0x0c
#define GL518_REG_VIN3        0x0d
#define GL518_REG_MISC        0x0f
#define GL518_REG_ALARM       0x10
#define GL518_REG_MASK        0x11
#define GL518_REG_INT         0x12
#define GL518_REG_VIN2        0x13
#define GL518_REG_VIN1        0x14
#define GL518_REG_VDD         0x15


/*
 * Conversions. Rounding and limit checking is only done on the TO_REG
 * variants. Note that you should be a bit careful with which arguments
 * these macros are called: arguments may be evaluated more than once.
 * Fixing this is just not worth it.
 */

#define RAW_FROM_REG(val)     val

#define BOOL_FROM_REG(val)    ((val)?0:1)
#define BOOL_TO_REG(val)      ((val)?0:1)

#define TEMP_TO_REG(val)      (SENSORS_LIMIT(((((val)<0? \
                        (val)-500:(val)+500)/1000)+119),0,255))
#define TEMP_FROM_REG(val)    (((val) - 119) * 1000)

static inline u8 FAN_TO_REG(long rpm, int div)
{
      long rpmdiv;
      if (rpm == 0)
            return 0;
      rpmdiv = SENSORS_LIMIT(rpm, 1, 1920000) * div;
      return SENSORS_LIMIT((960000 + rpmdiv / 2) / rpmdiv, 1, 255);
}
#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (960000/((val)*(div))))

#define IN_TO_REG(val)        (SENSORS_LIMIT((((val)+9)/19),0,255))
#define IN_FROM_REG(val)      ((val)*19)

#define VDD_TO_REG(val)       (SENSORS_LIMIT((((val)*4+47)/95),0,255))
#define VDD_FROM_REG(val)     (((val)*95+2)/4)

#define DIV_TO_REG(val)       ((val)==4?2:(val)==2?1:(val)==1?0:3)
#define DIV_FROM_REG(val)     (1 << (val))

#define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask)
#define BEEP_MASK_FROM_REG(val)     ((val) & 0x7f)

/* Each client has this additional data */
struct gl518_data {
      struct i2c_client client;
      struct device *hwmon_dev;
      enum chips type;

      struct mutex update_lock;
      char valid;       /* !=0 if following fields are valid */
      unsigned long last_updated;   /* In jiffies */

      u8 voltage_in[4]; /* Register values; [0] = VDD */
      u8 voltage_min[4];      /* Register values; [0] = VDD */
      u8 voltage_max[4];      /* Register values; [0] = VDD */
      u8 iter_voltage_in[4];  /* Register values; [0] = VDD */
      u8 fan_in[2];
      u8 fan_min[2];
      u8 fan_div[2];          /* Register encoding, shifted right */
      u8 fan_auto1;           /* Boolean */
      u8 temp_in;       /* Register values */
      u8 temp_max;            /* Register values */
      u8 temp_hyst;           /* Register values */
      u8 alarms;        /* Register value */
      u8 alarm_mask;          /* Register value */
      u8 beep_mask;           /* Register value */
      u8 beep_enable;         /* Boolean */
};

static int gl518_attach_adapter(struct i2c_adapter *adapter);
static int gl518_detect(struct i2c_adapter *adapter, int address, int kind);
static void gl518_init_client(struct i2c_client *client);
static int gl518_detach_client(struct i2c_client *client);
static int gl518_read_value(struct i2c_client *client, u8 reg);
static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct gl518_data *gl518_update_device(struct device *dev);

/* This is the driver that will be inserted */
static struct i2c_driver gl518_driver = {
      .driver = {
            .name = "gl518sm",
      },
      .id         = I2C_DRIVERID_GL518,
      .attach_adapter   = gl518_attach_adapter,
      .detach_client    = gl518_detach_client,
};

/*
 * Sysfs stuff
 */

#define show(type, suffix, value)                           \
static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)            \
{                                                     \
      struct gl518_data *data = gl518_update_device(dev);         \
      return sprintf(buf, "%d\n", type##_FROM_REG(data->value));  \
}

#define show_fan(suffix, value, index)                            \
static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)            \
{                                                     \
      struct gl518_data *data = gl518_update_device(dev);         \
      return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[index],      \
            DIV_FROM_REG(data->fan_div[index])));                 \
}

show(TEMP, temp_input1, temp_in);
show(TEMP, temp_max1, temp_max);
show(TEMP, temp_hyst1, temp_hyst);
show(BOOL, fan_auto1, fan_auto1);
show_fan(fan_input1, fan_in, 0);
show_fan(fan_input2, fan_in, 1);
show_fan(fan_min1, fan_min, 0);
show_fan(fan_min2, fan_min, 1);
show(DIV, fan_div1, fan_div[0]);
show(DIV, fan_div2, fan_div[1]);
show(VDD, in_input0, voltage_in[0]);
show(IN, in_input1, voltage_in[1]);
show(IN, in_input2, voltage_in[2]);
show(IN, in_input3, voltage_in[3]);
show(VDD, in_min0, voltage_min[0]);
show(IN, in_min1, voltage_min[1]);
show(IN, in_min2, voltage_min[2]);
show(IN, in_min3, voltage_min[3]);
show(VDD, in_max0, voltage_max[0]);
show(IN, in_max1, voltage_max[1]);
show(IN, in_max2, voltage_max[2]);
show(IN, in_max3, voltage_max[3]);
show(RAW, alarms, alarms);
show(BOOL, beep_enable, beep_enable);
show(BEEP_MASK, beep_mask, beep_mask);

#define set(type, suffix, value, reg)                             \
static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
      size_t count)                                         \
{                                                     \
      struct i2c_client *client = to_i2c_client(dev);             \
      struct gl518_data *data = i2c_get_clientdata(client);       \
      long val = simple_strtol(buf, NULL, 10);              \
                                                      \
      mutex_lock(&data->update_lock);                             \
      data->value = type##_TO_REG(val);                     \
      gl518_write_value(client, reg, data->value);                \
      mutex_unlock(&data->update_lock);                     \
      return count;                                         \
}

#define set_bits(type, suffix, value, reg, mask, shift)                 \
static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
      size_t count)                                         \
{                                                     \
      struct i2c_client *client = to_i2c_client(dev);             \
      struct gl518_data *data = i2c_get_clientdata(client);       \
      int regvalue;                                         \
      unsigned long val = simple_strtoul(buf, NULL, 10);          \
                                                      \
      mutex_lock(&data->update_lock);                             \
      regvalue = gl518_read_value(client, reg);             \
      data->value = type##_TO_REG(val);                     \
      regvalue = (regvalue & ~mask) | (data->value << shift);           \
      gl518_write_value(client, reg, regvalue);             \
      mutex_unlock(&data->update_lock);                     \
      return count;                                         \
}

#define set_low(type, suffix, value, reg)                   \
      set_bits(type, suffix, value, reg, 0x00ff, 0)
#define set_high(type, suffix, value, reg)                        \
      set_bits(type, suffix, value, reg, 0xff00, 8)

set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
set_bits(DIV, fan_div1, fan_div[0], GL518_REG_MISC, 0xc0, 6);
set_bits(DIV, fan_div2, fan_div[1], GL518_REG_MISC, 0x30, 4);
set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);

static ssize_t set_fan_min1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
      struct i2c_client *client = to_i2c_client(dev);
      struct gl518_data *data = i2c_get_clientdata(client);
      int regvalue;
      unsigned long val = simple_strtoul(buf, NULL, 10);

      mutex_lock(&data->update_lock);
      regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
      data->fan_min[0] = FAN_TO_REG(val,
            DIV_FROM_REG(data->fan_div[0]));
      regvalue = (regvalue & 0x00ff) | (data->fan_min[0] << 8);
      gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);

      data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
      if (data->fan_min[0] == 0)
            data->alarm_mask &= ~0x20;
      else
            data->alarm_mask |= 0x20;
      data->beep_mask &= data->alarm_mask;
      gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);

      mutex_unlock(&data->update_lock);
      return count;
}

static ssize_t set_fan_min2(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
      struct i2c_client *client = to_i2c_client(dev);
      struct gl518_data *data = i2c_get_clientdata(client);
      int regvalue;
      unsigned long val = simple_strtoul(buf, NULL, 10);

      mutex_lock(&data->update_lock);
      regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
      data->fan_min[1] = FAN_TO_REG(val,
            DIV_FROM_REG(data->fan_div[1]));
      regvalue = (regvalue & 0xff00) | data->fan_min[1];
      gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);

      data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
      if (data->fan_min[1] == 0)
            data->alarm_mask &= ~0x40;
      else
            data->alarm_mask |= 0x40;
      data->beep_mask &= data->alarm_mask;
      gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);

      mutex_unlock(&data->update_lock);
      return count;
}

static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
      show_temp_hyst1, set_temp_hyst1);
static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
static DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, show_fan_min1, set_fan_min1);
static DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, show_fan_min2, set_fan_min2);
static DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, show_fan_div1, set_fan_div1);
static DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, show_fan_div2, set_fan_div2);
static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
      show_beep_enable, set_beep_enable);
static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
      show_beep_mask, set_beep_mask);

static struct attribute *gl518_attributes[] = {
      &dev_attr_in0_input.attr,
      &dev_attr_in1_input.attr,
      &dev_attr_in2_input.attr,
      &dev_attr_in3_input.attr,
      &dev_attr_in0_min.attr,
      &dev_attr_in1_min.attr,
      &dev_attr_in2_min.attr,
      &dev_attr_in3_min.attr,
      &dev_attr_in0_max.attr,
      &dev_attr_in1_max.attr,
      &dev_attr_in2_max.attr,
      &dev_attr_in3_max.attr,

      &dev_attr_fan1_auto.attr,
      &dev_attr_fan1_input.attr,
      &dev_attr_fan2_input.attr,
      &dev_attr_fan1_min.attr,
      &dev_attr_fan2_min.attr,
      &dev_attr_fan1_div.attr,
      &dev_attr_fan2_div.attr,

      &dev_attr_temp1_input.attr,
      &dev_attr_temp1_max.attr,
      &dev_attr_temp1_max_hyst.attr,

      &dev_attr_alarms.attr,
      &dev_attr_beep_enable.attr,
      &dev_attr_beep_mask.attr,
      NULL
};

static const struct attribute_group gl518_group = {
      .attrs = gl518_attributes,
};

/*
 * Real code
 */

static int gl518_attach_adapter(struct i2c_adapter *adapter)
{
      if (!(adapter->class & I2C_CLASS_HWMON))
            return 0;
      return i2c_probe(adapter, &addr_data, gl518_detect);
}

static int gl518_detect(struct i2c_adapter *adapter, int address, int kind)
{
      int i;
      struct i2c_client *new_client;
      struct gl518_data *data;
      int err = 0;

      if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
                             I2C_FUNC_SMBUS_WORD_DATA))
            goto exit;

      /* OK. For now, we presume we have a valid client. We now create the
         client structure, even though we cannot fill it completely yet.
         But it allows us to access gl518_{read,write}_value. */

      if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) {
            err = -ENOMEM;
            goto exit;
      }

      new_client = &data->client;
      i2c_set_clientdata(new_client, data);

      new_client->addr = address;
      new_client->adapter = adapter;
      new_client->driver = &gl518_driver;
      new_client->flags = 0;

      /* Now, we do the remaining detection. */

      if (kind < 0) {
            if ((gl518_read_value(new_client, GL518_REG_CHIP_ID) != 0x80)
             || (gl518_read_value(new_client, GL518_REG_CONF) & 0x80))
                  goto exit_free;
      }

      /* Determine the chip type. */
      if (kind <= 0) {
            i = gl518_read_value(new_client, GL518_REG_REVISION);
            if (i == 0x00) {
                  kind = gl518sm_r00;
            } else if (i == 0x80) {
                  kind = gl518sm_r80;
            } else {
                  if (kind <= 0)
                        dev_info(&adapter->dev,
                            "Ignoring 'force' parameter for unknown "
                            "chip at adapter %d, address 0x%02x\n",
                            i2c_adapter_id(adapter), address);
                  goto exit_free;
            }
      }

      /* Fill in the remaining client fields */
      strlcpy(new_client->name, "gl518sm", I2C_NAME_SIZE);
      data->type = kind;
      data->valid = 0;
      mutex_init(&data->update_lock);

      /* Tell the I2C layer a new client has arrived */
      if ((err = i2c_attach_client(new_client)))
            goto exit_free;

      /* Initialize the GL518SM chip */
      data->alarm_mask = 0xff;
      data->voltage_in[0]=data->voltage_in[1]=data->voltage_in[2]=0;
      gl518_init_client((struct i2c_client *) new_client);

      /* Register sysfs hooks */
      if ((err = sysfs_create_group(&new_client->dev.kobj, &gl518_group)))
            goto exit_detach;

      data->hwmon_dev = hwmon_device_register(&new_client->dev);
      if (IS_ERR(data->hwmon_dev)) {
            err = PTR_ERR(data->hwmon_dev);
            goto exit_remove_files;
      }

      return 0;

exit_remove_files:
      sysfs_remove_group(&new_client->dev.kobj, &gl518_group);
exit_detach:
      i2c_detach_client(new_client);
exit_free:
      kfree(data);
exit:
      return err;
}


/* Called when we have found a new GL518SM.
   Note that we preserve D4:NoFan2 and D2:beep_enable. */
static void gl518_init_client(struct i2c_client *client)
{
      /* Make sure we leave D7:Reset untouched */
      u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;

      /* Comparator mode (D3=0), standby mode (D6=0) */
      gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));

      /* Never interrupts */
      gl518_write_value(client, GL518_REG_MASK, 0x00);

      /* Clear status register (D5=1), start (D6=1) */
      gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
      gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
}

static int gl518_detach_client(struct i2c_client *client)
{
      struct gl518_data *data = i2c_get_clientdata(client);
      int err;

      hwmon_device_unregister(data->hwmon_dev);
      sysfs_remove_group(&client->dev.kobj, &gl518_group);

      if ((err = i2c_detach_client(client)))
            return err;

      kfree(data);
      return 0;
}

/* Registers 0x07 to 0x0c are word-sized, others are byte-sized 
   GL518 uses a high-byte first convention, which is exactly opposite to
   the usual practice. */
static int gl518_read_value(struct i2c_client *client, u8 reg)
{
      if ((reg >= 0x07) && (reg <= 0x0c))
            return swab16(i2c_smbus_read_word_data(client, reg));
      else
            return i2c_smbus_read_byte_data(client, reg);
}

/* Registers 0x07 to 0x0c are word-sized, others are byte-sized 
   GL518 uses a high-byte first convention, which is exactly opposite to
   the usual practice. */
static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
{
      if ((reg >= 0x07) && (reg <= 0x0c))
            return i2c_smbus_write_word_data(client, reg, swab16(value));
      else
            return i2c_smbus_write_byte_data(client, reg, value);
}

static struct gl518_data *gl518_update_device(struct device *dev)
{
      struct i2c_client *client = to_i2c_client(dev);
      struct gl518_data *data = i2c_get_clientdata(client);
      int val;

      mutex_lock(&data->update_lock);

      if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
          || !data->valid) {
            dev_dbg(&client->dev, "Starting gl518 update\n");

            data->alarms = gl518_read_value(client, GL518_REG_INT);
            data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);

            val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
            data->voltage_min[0] = val & 0xff;
            data->voltage_max[0] = (val >> 8) & 0xff;
            val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
            data->voltage_min[1] = val & 0xff;
            data->voltage_max[1] = (val >> 8) & 0xff;
            val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
            data->voltage_min[2] = val & 0xff;
            data->voltage_max[2] = (val >> 8) & 0xff;
            val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
            data->voltage_min[3] = val & 0xff;
            data->voltage_max[3] = (val >> 8) & 0xff;

            val = gl518_read_value(client, GL518_REG_FAN_COUNT);
            data->fan_in[0] = (val >> 8) & 0xff;
            data->fan_in[1] = val & 0xff;

            val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
            data->fan_min[0] = (val >> 8) & 0xff;
            data->fan_min[1] = val & 0xff;

            data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
            data->temp_max =
                gl518_read_value(client, GL518_REG_TEMP_MAX);
            data->temp_hyst =
                gl518_read_value(client, GL518_REG_TEMP_HYST);

            val = gl518_read_value(client, GL518_REG_MISC);
            data->fan_div[0] = (val >> 6) & 0x03;
            data->fan_div[1] = (val >> 4) & 0x03;
            data->fan_auto1  = (val >> 3) & 0x01;

            data->alarms &= data->alarm_mask;

            val = gl518_read_value(client, GL518_REG_CONF);
            data->beep_enable = (val >> 2) & 1;

            if (data->type != gl518sm_r00) {
                  data->voltage_in[0] =
                      gl518_read_value(client, GL518_REG_VDD);
                  data->voltage_in[1] =
                      gl518_read_value(client, GL518_REG_VIN1);
                  data->voltage_in[2] =
                      gl518_read_value(client, GL518_REG_VIN2);
            }
            data->voltage_in[3] =
                gl518_read_value(client, GL518_REG_VIN3);

            data->last_updated = jiffies;
            data->valid = 1;
      }

      mutex_unlock(&data->update_lock);

      return data;
}

static int __init sensors_gl518sm_init(void)
{
      return i2c_add_driver(&gl518_driver);
}

static void __exit sensors_gl518sm_exit(void)
{
      i2c_del_driver(&gl518_driver);
}

MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
      "Kyosti Malkki <kmalkki@cc.hut.fi> and "
      "Hong-Gunn Chew <hglinux@gunnet.org>");
MODULE_DESCRIPTION("GL518SM driver");
MODULE_LICENSE("GPL");

module_init(sensors_gl518sm_init);
module_exit(sensors_gl518sm_exit);

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