drivers/hwmon/smsc47m192.c

   1 /*
   2     smsc47m192.c - Support for hardware monitoring block of
   3                    SMSC LPC47M192 and LPC47M997 Super I/O chips
   4
   5     Copyright (C) 2006  Hartmut Rick <linux@rick.claranet.de>
   6
   7     Derived from lm78.c and other chip drivers.
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17     GNU General Public License for more details.
  18
  19     You should have received a copy of the GNU General Public License
  20     along with this program; if not, write to the Free Software
  21     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/i2c.h>
  29 #include <linux/hwmon.h>
  30 #include <linux/hwmon-sysfs.h>
  31 #include <linux/hwmon-vid.h>
  32 #include <linux/err.h>
  33
  34 /* Addresses to scan */
  35 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  36
  37 /* Insmod parameters */
  38 I2C_CLIENT_INSMOD_1(smsc47m192);
  39
  40 /* SMSC47M192 registers */
  41 #define SMSC47M192_REG_IN(nr)           ((nr)<6 ? (0x20 + (nr)) : \
  42                                         (0x50 + (nr) - 6))
  43 #define SMSC47M192_REG_IN_MAX(nr)       ((nr)<6 ? (0x2b + (nr) * 2) : \
  44                                         (0x54 + (((nr) - 6) * 2)))
  45 #define SMSC47M192_REG_IN_MIN(nr)       ((nr)<6 ? (0x2c + (nr) * 2) : \
  46                                         (0x55 + (((nr) - 6) * 2)))
  47 static u8 SMSC47M192_REG_TEMP[3] =      { 0x27, 0x26, 0x52 };
  48 static u8 SMSC47M192_REG_TEMP_MAX[3] =  { 0x39, 0x37, 0x58 };
  49 static u8 SMSC47M192_REG_TEMP_MIN[3] =  { 0x3A, 0x38, 0x59 };
  50 #define SMSC47M192_REG_TEMP_OFFSET(nr)  ((nr)==2 ? 0x1e : 0x1f)
  51 #define SMSC47M192_REG_ALARM1           0x41
  52 #define SMSC47M192_REG_ALARM2           0x42
  53 #define SMSC47M192_REG_VID              0x47
  54 #define SMSC47M192_REG_VID4             0x49
  55 #define SMSC47M192_REG_CONFIG           0x40
  56 #define SMSC47M192_REG_SFR              0x4f
  57 #define SMSC47M192_REG_COMPANY_ID       0x3e
  58 #define SMSC47M192_REG_VERSION          0x3f
  59
  60 /* generalised scaling with integer rounding */
  61 static inline int SCALE(long val, int mul, int div)
  62 {
  63         if (val < 0)
  64                 return (val * mul - div / 2) / div;
  65         else
  66                 return (val * mul + div / 2) / div;
  67 }
  68
  69 /* Conversions */
  70
  71 /* smsc47m192 internally scales voltage measurements */
  72 static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };
  73
  74 static inline unsigned int IN_FROM_REG(u8 reg, int n)
  75 {
  76         return SCALE(reg, nom_mv[n], 192);
  77 }
  78
  79 static inline u8 IN_TO_REG(unsigned long val, int n)
  80 {
  81         return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
  82 }
  83
  84 /* TEMP: 0.001 degC units (-128C to +127C)
  85    REG: 1C/bit, two's complement */
  86 static inline s8 TEMP_TO_REG(int val)
  87 {
  88         return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
  89 }
  90
  91 static inline int TEMP_FROM_REG(s8 val)
  92 {
  93         return val * 1000;
  94 }
  95
  96 struct smsc47m192_data {
  97         struct i2c_client client;
  98         struct class_device *class_dev;
  99         struct semaphore update_lock;
 100         char valid;             /* !=0 if following fields are valid */
 101         unsigned long last_updated;     /* In jiffies */
 102
 103         u8 in[8];               /* Register value */
 104         u8 in_max[8];           /* Register value */
 105         u8 in_min[8];           /* Register value */
 106         s8 temp[3];             /* Register value */
 107         s8 temp_max[3];         /* Register value */
 108         s8 temp_min[3];         /* Register value */
 109         s8 temp_offset[3];      /* Register value */
 110         u16 alarms;             /* Register encoding, combined */
 111         u8 vid;                 /* Register encoding, combined */
 112         u8 vrm;
 113 };
 114
 115 static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
 116 static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
 117                 int kind);
 118 static int smsc47m192_detach_client(struct i2c_client *client);
 119 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
 120
 121 static struct i2c_driver smsc47m192_driver = {
 122         .driver = {
 123                 .name   = "smsc47m192",
 124         },
 125         .attach_adapter = smsc47m192_attach_adapter,
 126         .detach_client  = smsc47m192_detach_client,
 127 };
 128
 129 /* Voltages */
 130 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 131                 char *buf)
 132 {
 133         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 134         int nr = sensor_attr->index;
 135         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 136         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
 137 }
 138
 139 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 140                 char *buf)
 141 {
 142         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 143         int nr = sensor_attr->index;
 144         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 145         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
 146 }
 147
 148 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 149                 char *buf)
 150 {
 151         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 152         int nr = sensor_attr->index;
 153         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 154         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
 155 }
 156
 157 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 158                 const char *buf, size_t count)
 159 {
 160         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 161         int nr = sensor_attr->index;
 162         struct i2c_client *client = to_i2c_client(dev);
 163         struct smsc47m192_data *data = i2c_get_clientdata(client);
 164         unsigned long val = simple_strtoul(buf, NULL, 10);
 165
 166         down(&data->update_lock);
 167         data->in_min[nr] = IN_TO_REG(val, nr);
 168         i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
 169                                                         data->in_min[nr]);
 170         up(&data->update_lock);
 171         return count;
 172 }
 173
 174 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 175                 const char *buf, size_t count)
 176 {
 177         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 178         int nr = sensor_attr->index;
 179         struct i2c_client *client = to_i2c_client(dev);
 180         struct smsc47m192_data *data = i2c_get_clientdata(client);
 181         unsigned long val = simple_strtoul(buf, NULL, 10);
 182
 183         down(&data->update_lock);
 184         data->in_max[nr] = IN_TO_REG(val, nr);
 185         i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
 186                                                         data->in_max[nr]);
 187         up(&data->update_lock);
 188         return count;
 189 }
 190
 191 #define show_in_offset(offset)                                  \
 192 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 193                 show_in, NULL, offset);                         \
 194 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 195                 show_in_min, set_in_min, offset);               \
 196 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 197                 show_in_max, set_in_max, offset);
 198
 199 show_in_offset(0)
 200 show_in_offset(1)
 201 show_in_offset(2)
 202 show_in_offset(3)
 203 show_in_offset(4)
 204 show_in_offset(5)
 205 show_in_offset(6)
 206 show_in_offset(7)
 207
 208 /* Temperatures */
 209 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 210                 char *buf)
 211 {
 212         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 213         int nr = sensor_attr->index;
 214         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 215         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 216 }
 217
 218 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 219                 char *buf)
 220 {
 221         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 222         int nr = sensor_attr->index;
 223         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 224         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
 225 }
 226
 227 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 228                 char *buf)
 229 {
 230         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 231         int nr = sensor_attr->index;
 232         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 233         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
 234 }
 235
 236 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 237                 const char *buf, size_t count)
 238 {
 239         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 240         int nr = sensor_attr->index;
 241         struct i2c_client *client = to_i2c_client(dev);
 242         struct smsc47m192_data *data = i2c_get_clientdata(client);
 243         long val = simple_strtol(buf, NULL, 10);
 244
 245         down(&data->update_lock);
 246         data->temp_min[nr] = TEMP_TO_REG(val);
 247         i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
 248                                                 data->temp_min[nr]);
 249         up(&data->update_lock);
 250         return count;
 251 }
 252
 253 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 254                 const char *buf, size_t count)
 255 {
 256         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 257         int nr = sensor_attr->index;
 258         struct i2c_client *client = to_i2c_client(dev);
 259         struct smsc47m192_data *data = i2c_get_clientdata(client);
 260         long val = simple_strtol(buf, NULL, 10);
 261
 262         down(&data->update_lock);
 263         data->temp_max[nr] = TEMP_TO_REG(val);
 264         i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
 265                                                 data->temp_max[nr]);
 266         up(&data->update_lock);
 267         return count;
 268 }
 269
 270 static ssize_t show_temp_offset(struct device *dev, struct device_attribute
 271                 *attr, char *buf)
 272 {
 273         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 274         int nr = sensor_attr->index;
 275         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 276         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
 277 }
 278
 279 static ssize_t set_temp_offset(struct device *dev, struct device_attribute
 280                 *attr, const char *buf, size_t count)
 281 {
 282         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 283         int nr = sensor_attr->index;
 284         struct i2c_client *client = to_i2c_client(dev);
 285         struct smsc47m192_data *data = i2c_get_clientdata(client);
 286         u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
 287         long val = simple_strtol(buf, NULL, 10);
 288
 289         down(&data->update_lock);
 290         data->temp_offset[nr] = TEMP_TO_REG(val);
 291         if (nr>1)
 292                 i2c_smbus_write_byte_data(client,
 293                         SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
 294         else if (data->temp_offset[nr] != 0) {
 295                 /* offset[0] and offset[1] share the same register,
 296                         SFR bit 4 activates offset[0] */
 297                 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
 298                                         (sfr & 0xef) | (nr==0 ? 0x10 : 0));
 299                 data->temp_offset[1-nr] = 0;
 300                 i2c_smbus_write_byte_data(client,
 301                         SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
 302         } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
 303                 i2c_smbus_write_byte_data(client,
 304                                         SMSC47M192_REG_TEMP_OFFSET(nr), 0);
 305         up(&data->update_lock);
 306         return count;
 307 }
 308
 309 #define show_temp_index(index)                                          \
 310 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO,                 \
 311                 show_temp, NULL, index-1);                              \
 312 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR,         \
 313                 show_temp_min, set_temp_min, index-1);                  \
 314 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR,         \
 315                 show_temp_max, set_temp_max, index-1);                  \
 316 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR,      \
 317                 show_temp_offset, set_temp_offset, index-1);
 318
 319 show_temp_index(1)
 320 show_temp_index(2)
 321 show_temp_index(3)
 322
 323 /* VID */
 324 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
 325                 char *buf)
 326 {
 327         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 328         return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 329 }
 330 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 331
 332 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
 333                 char *buf)
 334 {
 335         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 336         return sprintf(buf, "%d\n", data->vrm);
 337 }
 338
 339 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 340                 const char *buf, size_t count)
 341 {
 342         struct i2c_client *client = to_i2c_client(dev);
 343         struct smsc47m192_data *data = i2c_get_clientdata(client);
 344         data->vrm = simple_strtoul(buf, NULL, 10);
 345         return count;
 346 }
 347 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
 348
 349 /* Alarms */
 350 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 351                 char *buf)
 352 {
 353         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 354         int nr = sensor_attr->index;
 355         struct smsc47m192_data *data = smsc47m192_update_device(dev);
 356         return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
 357 }
 358
 359 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
 360 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
 361 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
 362 static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 0x4000);
 363 static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 0x8000);
 364 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
 365 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
 366 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
 367 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
 368 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
 369 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
 370 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
 371 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
 372
 373 /* This function is called when:
 374     * smsc47m192_driver is inserted (when this module is loaded), for each
 375       available adapter
 376     * when a new adapter is inserted (and smsc47m192_driver is still present) */
 377 static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
 378 {
 379         if (!(adapter->class & I2C_CLASS_HWMON))
 380                 return 0;
 381         return i2c_probe(adapter, &addr_data, smsc47m192_detect);
 382 }
 383
 384 static void smsc47m192_init_client(struct i2c_client *client)
 385 {
 386         int i;
 387         u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
 388         u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
 389
 390         /* select cycle mode (pause 1 sec between updates) */
 391         i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
 392                                                 (sfr & 0xfd) | 0x02);
 393         if (!(config & 0x01)) {
 394                 /* initialize alarm limits */
 395                 for (i=0; i<8; i++) {
 396                         i2c_smbus_write_byte_data(client,
 397                                 SMSC47M192_REG_IN_MIN(i), 0);
 398                         i2c_smbus_write_byte_data(client,
 399                                 SMSC47M192_REG_IN_MAX(i), 0xff);
 400                 }
 401                 for (i=0; i<3; i++) {
 402                         i2c_smbus_write_byte_data(client,
 403                                 SMSC47M192_REG_TEMP_MIN[i], 0x80);
 404                         i2c_smbus_write_byte_data(client,
 405                                 SMSC47M192_REG_TEMP_MAX[i], 0x7f);
 406                 }
 407
 408                 /* start monitoring */
 409                 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
 410                                                 (config & 0xf7) | 0x01);
 411         }
 412 }
 413
 414 /* This function is called by i2c_probe */
 415 static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
 416                 int kind)
 417 {
 418         struct i2c_client *client;
 419         struct smsc47m192_data *data;
 420         int err = 0;
 421         int version, config;
 422
 423         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 424                 goto exit;
 425
 426         if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
 427                 err = -ENOMEM;
 428                 goto exit;
 429         }
 430
 431         client = &data->client;
 432         i2c_set_clientdata(client, data);
 433         client->addr = address;
 434         client->adapter = adapter;
 435         client->driver = &smsc47m192_driver;
 436
 437         if (kind == 0)
 438                 kind = smsc47m192;
 439
 440         /* Detection criteria from sensors_detect script */
 441         if (kind < 0) {
 442                 if (i2c_smbus_read_byte_data(client,
 443                                 SMSC47M192_REG_COMPANY_ID) == 0x55
 444                  && ((version = i2c_smbus_read_byte_data(client,
 445                                 SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
 446                  && (i2c_smbus_read_byte_data(client,
 447                                 SMSC47M192_REG_VID) & 0x70) == 0x00
 448                  && (i2c_smbus_read_byte_data(client,
 449                                 SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
 450                         dev_info(&adapter->dev,
 451                                  "found SMSC47M192 or SMSC47M997, "
 452                                  "version 2, stepping A%d\n", version & 0x0f);
 453                 } else {
 454                         dev_dbg(&adapter->dev,
 455                                 "SMSC47M192 detection failed at 0x%02x\n",
 456                                 address);
 457                         goto exit_free;
 458                 }
 459         }
 460
 461         /* Fill in the remaining client fields and put into the global list */
 462         strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
 463         data->vrm = vid_which_vrm();
 464         init_MUTEX(&data->update_lock);
 465
 466         /* Tell the I2C layer a new client has arrived */
 467         if ((err = i2c_attach_client(client)))
 468                 goto exit_free;
 469
 470         /* Initialize the SMSC47M192 chip */
 471         smsc47m192_init_client(client);
 472
 473         /* Register sysfs hooks */
 474         data->class_dev = hwmon_device_register(&client->dev);
 475         if (IS_ERR(data->class_dev)) {
 476                 err = PTR_ERR(data->class_dev);
 477                 goto exit_detach;
 478         }
 479
 480         device_create_file(&client->dev, &sensor_dev_attr_in0_input.dev_attr);
 481         device_create_file(&client->dev, &sensor_dev_attr_in0_min.dev_attr);
 482         device_create_file(&client->dev, &sensor_dev_attr_in0_max.dev_attr);
 483         device_create_file(&client->dev, &sensor_dev_attr_in0_alarm.dev_attr);
 484         device_create_file(&client->dev, &sensor_dev_attr_in1_input.dev_attr);
 485         device_create_file(&client->dev, &sensor_dev_attr_in1_min.dev_attr);
 486         device_create_file(&client->dev, &sensor_dev_attr_in1_max.dev_attr);
 487         device_create_file(&client->dev, &sensor_dev_attr_in1_alarm.dev_attr);
 488         device_create_file(&client->dev, &sensor_dev_attr_in2_input.dev_attr);
 489         device_create_file(&client->dev, &sensor_dev_attr_in2_min.dev_attr);
 490         device_create_file(&client->dev, &sensor_dev_attr_in2_max.dev_attr);
 491         device_create_file(&client->dev, &sensor_dev_attr_in2_alarm.dev_attr);
 492         device_create_file(&client->dev, &sensor_dev_attr_in3_input.dev_attr);
 493         device_create_file(&client->dev, &sensor_dev_attr_in3_min.dev_attr);
 494         device_create_file(&client->dev, &sensor_dev_attr_in3_max.dev_attr);
 495         device_create_file(&client->dev, &sensor_dev_attr_in3_alarm.dev_attr);
 496
 497         /* Pin 110 is either in4 (+12V) or VID4 */
 498         config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
 499         if (!(config & 0x20)) {
 500                 device_create_file(&client->dev,
 501                                    &sensor_dev_attr_in4_input.dev_attr);
 502                 device_create_file(&client->dev,
 503                                    &sensor_dev_attr_in4_min.dev_attr);
 504                 device_create_file(&client->dev,
 505                                    &sensor_dev_attr_in4_max.dev_attr);
 506                 device_create_file(&client->dev,
 507                                    &sensor_dev_attr_in4_alarm.dev_attr);
 508         }
 509         device_create_file(&client->dev, &sensor_dev_attr_in5_input.dev_attr);
 510         device_create_file(&client->dev, &sensor_dev_attr_in5_min.dev_attr);
 511         device_create_file(&client->dev, &sensor_dev_attr_in5_max.dev_attr);
 512         device_create_file(&client->dev, &sensor_dev_attr_in5_alarm.dev_attr);
 513         device_create_file(&client->dev, &sensor_dev_attr_in6_input.dev_attr);
 514         device_create_file(&client->dev, &sensor_dev_attr_in6_min.dev_attr);
 515         device_create_file(&client->dev, &sensor_dev_attr_in6_max.dev_attr);
 516         device_create_file(&client->dev, &sensor_dev_attr_in6_alarm.dev_attr);
 517         device_create_file(&client->dev, &sensor_dev_attr_in7_input.dev_attr);
 518         device_create_file(&client->dev, &sensor_dev_attr_in7_min.dev_attr);
 519         device_create_file(&client->dev, &sensor_dev_attr_in7_max.dev_attr);
 520         device_create_file(&client->dev, &sensor_dev_attr_in7_alarm.dev_attr);
 521         device_create_file(&client->dev, &sensor_dev_attr_temp1_input.dev_attr);
 522         device_create_file(&client->dev, &sensor_dev_attr_temp1_max.dev_attr);
 523         device_create_file(&client->dev, &sensor_dev_attr_temp1_min.dev_attr);
 524         device_create_file(&client->dev,
 525                            &sensor_dev_attr_temp1_offset.dev_attr);
 526         device_create_file(&client->dev, &sensor_dev_attr_temp1_alarm.dev_attr);
 527         device_create_file(&client->dev, &sensor_dev_attr_temp2_input.dev_attr);
 528         device_create_file(&client->dev, &sensor_dev_attr_temp2_max.dev_attr);
 529         device_create_file(&client->dev, &sensor_dev_attr_temp2_min.dev_attr);
 530         device_create_file(&client->dev,
 531                            &sensor_dev_attr_temp2_offset.dev_attr);
 532         device_create_file(&client->dev, &sensor_dev_attr_temp2_alarm.dev_attr);
 533         device_create_file(&client->dev,
 534                            &sensor_dev_attr_temp2_input_fault.dev_attr);
 535         device_create_file(&client->dev, &sensor_dev_attr_temp3_input.dev_attr);
 536         device_create_file(&client->dev, &sensor_dev_attr_temp3_max.dev_attr);
 537         device_create_file(&client->dev, &sensor_dev_attr_temp3_min.dev_attr);
 538         device_create_file(&client->dev,
 539                            &sensor_dev_attr_temp3_offset.dev_attr);
 540         device_create_file(&client->dev, &sensor_dev_attr_temp3_alarm.dev_attr);
 541         device_create_file(&client->dev,
 542                            &sensor_dev_attr_temp3_input_fault.dev_attr);
 543         device_create_file(&client->dev, &dev_attr_cpu0_vid);
 544         device_create_file(&client->dev, &dev_attr_vrm);
 545
 546         return 0;
 547
 548 exit_detach:
 549         i2c_detach_client(client);
 550 exit_free:
 551         kfree(data);
 552 exit:
 553         return err;
 554 }
 555
 556 static int smsc47m192_detach_client(struct i2c_client *client)
 557 {
 558         struct smsc47m192_data *data = i2c_get_clientdata(client);
 559         int err;
 560
 561         hwmon_device_unregister(data->class_dev);
 562
 563         if ((err = i2c_detach_client(client)))
 564                 return err;
 565
 566         kfree(data);
 567
 568         return 0;
 569 }
 570
 571 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
 572 {
 573         struct i2c_client *client = to_i2c_client(dev);
 574         struct smsc47m192_data *data = i2c_get_clientdata(client);
 575         int i, config;
 576
 577         down(&data->update_lock);
 578
 579         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 580          || !data->valid) {
 581                 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
 582
 583                 dev_dbg(&client->dev, "Starting smsc47m192 update\n");
 584
 585                 for (i = 0; i <= 7; i++) {
 586                         data->in[i] = i2c_smbus_read_byte_data(client,
 587                                                 SMSC47M192_REG_IN(i));
 588                         data->in_min[i] = i2c_smbus_read_byte_data(client,
 589                                                 SMSC47M192_REG_IN_MIN(i));
 590                         data->in_max[i] = i2c_smbus_read_byte_data(client,
 591                                                 SMSC47M192_REG_IN_MAX(i));
 592                 }
 593                 for (i = 0; i < 3; i++) {
 594                         data->temp[i] = i2c_smbus_read_byte_data(client,
 595                                                 SMSC47M192_REG_TEMP[i]);
 596                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 597                                                 SMSC47M192_REG_TEMP_MAX[i]);
 598                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 599                                                 SMSC47M192_REG_TEMP_MIN[i]);
 600                 }
 601                 for (i = 1; i < 3; i++)
 602                         data->temp_offset[i] = i2c_smbus_read_byte_data(client,
 603                                                 SMSC47M192_REG_TEMP_OFFSET(i));
 604                 /* first offset is temp_offset[0] if SFR bit 4 is set,
 605                                         temp_offset[1] otherwise */
 606                 if (sfr & 0x10) {
 607                         data->temp_offset[0] = data->temp_offset[1];
 608                         data->temp_offset[1] = 0;
 609                 } else
 610                         data->temp_offset[0] = 0;
 611
 612                 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
 613                             & 0x0f;
 614                 config = i2c_smbus_read_byte_data(client,
 615                                                   SMSC47M192_REG_CONFIG);
 616                 if (config & 0x20)
 617                         data->vid |= (i2c_smbus_read_byte_data(client,
 618                                         SMSC47M192_REG_VID4) & 0x01) << 4;
 619                 data->alarms = i2c_smbus_read_byte_data(client,
 620                                                 SMSC47M192_REG_ALARM1) |
 621                                (i2c_smbus_read_byte_data(client,
 622                                                 SMSC47M192_REG_ALARM2) << 8);
 623
 624                 data->last_updated = jiffies;
 625                 data->valid = 1;
 626         }
 627
 628         up(&data->update_lock);
 629
 630         return data;
 631 }
 632
 633 static int __init smsc47m192_init(void)
 634 {
 635         return i2c_add_driver(&smsc47m192_driver);
 636 }
 637
 638 static void __exit smsc47m192_exit(void)
 639 {
 640         i2c_del_driver(&smsc47m192_driver);
 641 }
 642
 643 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
 644 MODULE_DESCRIPTION("SMSC47M192 driver");
 645 MODULE_LICENSE("GPL");
 646
 647 module_init(smsc47m192_init);
 648 module_exit(smsc47m192_exit);