drivers/hwmon/adm1025.c

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This source file includes following definitions.
adm1025_update_device
in_show
in_min_show
in_max_show
temp_show
temp_min_show
temp_max_show
in_min_store
in_max_store
temp_min_store
temp_max_store
alarms_show
alarm_show
cpu0_vid_show
vrm_show
vrm_store
adm1025_detect
adm1025_init_client
adm1025_probe
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * adm1025.c
   4  *
   5  * Copyright (C) 2000       Chen-Yuan Wu <gwu@esoft.com>
   6  * Copyright (C) 2003-2009  Jean Delvare <jdelvare@suse.de>
   7  *
   8  * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
   9  * voltages (including its own power source) and up to two temperatures
  10  * (its own plus up to one external one). Voltages are scaled internally
  11  * (which is not the common way) with ratios such that the nominal value
  12  * of each voltage correspond to a register value of 192 (which means a
  13  * resolution of about 0.5% of the nominal value). Temperature values are
  14  * reported with a 1 deg resolution and a 3 deg accuracy. Complete
  15  * datasheet can be obtained from Analog's website at:
  16  *   http://www.onsemi.com/PowerSolutions/product.do?id=ADM1025
  17  *
  18  * This driver also supports the ADM1025A, which differs from the ADM1025
  19  * only in that it has "open-drain VID inputs while the ADM1025 has
  20  * on-chip 100k pull-ups on the VID inputs". It doesn't make any
  21  * difference for us.
  22  *
  23  * This driver also supports the NE1619, a sensor chip made by Philips.
  24  * That chip is similar to the ADM1025A, with a few differences. The only
  25  * difference that matters to us is that the NE1619 has only two possible
  26  * addresses while the ADM1025A has a third one. Complete datasheet can be
  27  * obtained from Philips's website at:
  28  *   http://www.semiconductors.philips.com/pip/NE1619DS.html
  29  *
  30  * Since the ADM1025 was the first chipset supported by this driver, most
  31  * comments will refer to this chipset, but are actually general and
  32  * concern all supported chipsets, unless mentioned otherwise.
  33  */
  34 
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/slab.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/i2c.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/hwmon-sysfs.h>
  42 #include <linux/hwmon-vid.h>
  43 #include <linux/err.h>
  44 #include <linux/mutex.h>
  45 
  46 /*
  47  * Addresses to scan
  48  * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
  49  * NE1619 has two possible addresses: 0x2c and 0x2d.
  50  */
  51 
  52 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  53 
  54 enum chips { adm1025, ne1619 };
  55 
  56 /*
  57  * The ADM1025 registers
  58  */
  59 
  60 #define ADM1025_REG_MAN_ID              0x3E
  61 #define ADM1025_REG_CHIP_ID             0x3F
  62 #define ADM1025_REG_CONFIG              0x40
  63 #define ADM1025_REG_STATUS1             0x41
  64 #define ADM1025_REG_STATUS2             0x42
  65 #define ADM1025_REG_IN(nr)              (0x20 + (nr))
  66 #define ADM1025_REG_IN_MAX(nr)          (0x2B + (nr) * 2)
  67 #define ADM1025_REG_IN_MIN(nr)          (0x2C + (nr) * 2)
  68 #define ADM1025_REG_TEMP(nr)            (0x26 + (nr))
  69 #define ADM1025_REG_TEMP_HIGH(nr)       (0x37 + (nr) * 2)
  70 #define ADM1025_REG_TEMP_LOW(nr)        (0x38 + (nr) * 2)
  71 #define ADM1025_REG_VID                 0x47
  72 #define ADM1025_REG_VID4                0x49
  73 
  74 /*
  75  * Conversions and various macros
  76  * The ADM1025 uses signed 8-bit values for temperatures.
  77  */
  78 
  79 static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
  80 
  81 #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
  82 #define IN_TO_REG(val, scale)   ((val) <= 0 ? 0 : \
  83                                  (val) >= (scale) * 255 / 192 ? 255 : \
  84                                  ((val) * 192 + (scale) / 2) / (scale))
  85 
  86 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
  87 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
  88                                  (val) >= 126500 ? 127 : \
  89                                  (((val) < 0 ? (val) - 500 : \
  90                                    (val) + 500) / 1000))
  91 
  92 /*
  93  * Client data (each client gets its own)
  94  */
  95 
  96 struct adm1025_data {
  97         struct i2c_client *client;
  98         const struct attribute_group *groups[3];
  99         struct mutex update_lock;
 100         char valid; /* zero until following fields are valid */
 101         unsigned long last_updated; /* in jiffies */
 102 
 103         u8 in[6];               /* register value */
 104         u8 in_max[6];           /* register value */
 105         u8 in_min[6];           /* register value */
 106         s8 temp[2];             /* register value */
 107         s8 temp_min[2];         /* register value */
 108         s8 temp_max[2];         /* register value */
 109         u16 alarms;             /* register values, combined */
 110         u8 vid;                 /* register values, combined */
 111         u8 vrm;
 112 };
 113 
 114 static struct adm1025_data *adm1025_update_device(struct device *dev)
 115 {
 116         struct adm1025_data *data = dev_get_drvdata(dev);
 117         struct i2c_client *client = data->client;
 118 
 119         mutex_lock(&data->update_lock);
 120 
 121         if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
 122                 int i;
 123 
 124                 dev_dbg(&client->dev, "Updating data.\n");
 125                 for (i = 0; i < 6; i++) {
 126                         data->in[i] = i2c_smbus_read_byte_data(client,
 127                                       ADM1025_REG_IN(i));
 128                         data->in_min[i] = i2c_smbus_read_byte_data(client,
 129                                           ADM1025_REG_IN_MIN(i));
 130                         data->in_max[i] = i2c_smbus_read_byte_data(client,
 131                                           ADM1025_REG_IN_MAX(i));
 132                 }
 133                 for (i = 0; i < 2; i++) {
 134                         data->temp[i] = i2c_smbus_read_byte_data(client,
 135                                         ADM1025_REG_TEMP(i));
 136                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 137                                             ADM1025_REG_TEMP_LOW(i));
 138                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 139                                             ADM1025_REG_TEMP_HIGH(i));
 140                 }
 141                 data->alarms = i2c_smbus_read_byte_data(client,
 142                                ADM1025_REG_STATUS1)
 143                              | (i2c_smbus_read_byte_data(client,
 144                                 ADM1025_REG_STATUS2) << 8);
 145                 data->vid = (i2c_smbus_read_byte_data(client,
 146                              ADM1025_REG_VID) & 0x0f)
 147                           | ((i2c_smbus_read_byte_data(client,
 148                               ADM1025_REG_VID4) & 0x01) << 4);
 149 
 150                 data->last_updated = jiffies;
 151                 data->valid = 1;
 152         }
 153 
 154         mutex_unlock(&data->update_lock);
 155 
 156         return data;
 157 }
 158 
 159 /*
 160  * Sysfs stuff
 161  */
 162 
 163 static ssize_t
 164 in_show(struct device *dev, struct device_attribute *attr, char *buf)
 165 {
 166         int index = to_sensor_dev_attr(attr)->index;
 167         struct adm1025_data *data = adm1025_update_device(dev);
 168         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
 169                        in_scale[index]));
 170 }
 171 
 172 static ssize_t
 173 in_min_show(struct device *dev, struct device_attribute *attr, char *buf)
 174 {
 175         int index = to_sensor_dev_attr(attr)->index;
 176         struct adm1025_data *data = adm1025_update_device(dev);
 177         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
 178                        in_scale[index]));
 179 }
 180 
 181 static ssize_t
 182 in_max_show(struct device *dev, struct device_attribute *attr, char *buf)
 183 {
 184         int index = to_sensor_dev_attr(attr)->index;
 185         struct adm1025_data *data = adm1025_update_device(dev);
 186         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
 187                        in_scale[index]));
 188 }
 189 
 190 static ssize_t
 191 temp_show(struct device *dev, struct device_attribute *attr, char *buf)
 192 {
 193         int index = to_sensor_dev_attr(attr)->index;
 194         struct adm1025_data *data = adm1025_update_device(dev);
 195         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
 196 }
 197 
 198 static ssize_t
 199 temp_min_show(struct device *dev, struct device_attribute *attr, char *buf)
 200 {
 201         int index = to_sensor_dev_attr(attr)->index;
 202         struct adm1025_data *data = adm1025_update_device(dev);
 203         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index]));
 204 }
 205 
 206 static ssize_t
 207 temp_max_show(struct device *dev, struct device_attribute *attr, char *buf)
 208 {
 209         int index = to_sensor_dev_attr(attr)->index;
 210         struct adm1025_data *data = adm1025_update_device(dev);
 211         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
 212 }
 213 
 214 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
 215                             const char *buf, size_t count)
 216 {
 217         int index = to_sensor_dev_attr(attr)->index;
 218         struct adm1025_data *data = dev_get_drvdata(dev);
 219         struct i2c_client *client = data->client;
 220         long val;
 221         int err;
 222 
 223         err = kstrtol(buf, 10, &val);
 224         if (err)
 225                 return err;
 226 
 227         mutex_lock(&data->update_lock);
 228         data->in_min[index] = IN_TO_REG(val, in_scale[index]);
 229         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
 230                                   data->in_min[index]);
 231         mutex_unlock(&data->update_lock);
 232         return count;
 233 }
 234 
 235 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
 236                             const char *buf, size_t count)
 237 {
 238         int index = to_sensor_dev_attr(attr)->index;
 239         struct adm1025_data *data = dev_get_drvdata(dev);
 240         struct i2c_client *client = data->client;
 241         long val;
 242         int err;
 243 
 244         err = kstrtol(buf, 10, &val);
 245         if (err)
 246                 return err;
 247 
 248         mutex_lock(&data->update_lock);
 249         data->in_max[index] = IN_TO_REG(val, in_scale[index]);
 250         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
 251                                   data->in_max[index]);
 252         mutex_unlock(&data->update_lock);
 253         return count;
 254 }
 255 
 256 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
 257 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
 258 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
 259 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
 260 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
 261 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
 262 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
 263 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
 264 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
 265 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
 266 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
 267 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
 268 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
 269 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
 270 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
 271 static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
 272 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
 273 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
 274 
 275 static ssize_t temp_min_store(struct device *dev,
 276                               struct device_attribute *attr, const char *buf,
 277                               size_t count)
 278 {
 279         int index = to_sensor_dev_attr(attr)->index;
 280         struct adm1025_data *data = dev_get_drvdata(dev);
 281         struct i2c_client *client = data->client;
 282         long val;
 283         int err;
 284 
 285         err = kstrtol(buf, 10, &val);
 286         if (err)
 287                 return err;
 288 
 289         mutex_lock(&data->update_lock);
 290         data->temp_min[index] = TEMP_TO_REG(val);
 291         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
 292                                   data->temp_min[index]);
 293         mutex_unlock(&data->update_lock);
 294         return count;
 295 }
 296 
 297 static ssize_t temp_max_store(struct device *dev,
 298                               struct device_attribute *attr, const char *buf,
 299                               size_t count)
 300 {
 301         int index = to_sensor_dev_attr(attr)->index;
 302         struct adm1025_data *data = dev_get_drvdata(dev);
 303         struct i2c_client *client = data->client;
 304         long val;
 305         int err;
 306 
 307         err = kstrtol(buf, 10, &val);
 308         if (err)
 309                 return err;
 310 
 311         mutex_lock(&data->update_lock);
 312         data->temp_max[index] = TEMP_TO_REG(val);
 313         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
 314                                   data->temp_max[index]);
 315         mutex_unlock(&data->update_lock);
 316         return count;
 317 }
 318 
 319 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
 320 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
 321 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
 322 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
 323 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
 324 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
 325 
 326 static ssize_t
 327 alarms_show(struct device *dev, struct device_attribute *attr, char *buf)
 328 {
 329         struct adm1025_data *data = adm1025_update_device(dev);
 330         return sprintf(buf, "%u\n", data->alarms);
 331 }
 332 static DEVICE_ATTR_RO(alarms);
 333 
 334 static ssize_t
 335 alarm_show(struct device *dev, struct device_attribute *attr, char *buf)
 336 {
 337         int bitnr = to_sensor_dev_attr(attr)->index;
 338         struct adm1025_data *data = adm1025_update_device(dev);
 339         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 340 }
 341 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
 342 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
 343 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
 344 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
 345 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
 346 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
 347 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 5);
 348 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 4);
 349 static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14);
 350 
 351 static ssize_t
 352 cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
 353 {
 354         struct adm1025_data *data = adm1025_update_device(dev);
 355         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 356 }
 357 static DEVICE_ATTR_RO(cpu0_vid);
 358 
 359 static ssize_t
 360 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 361 {
 362         struct adm1025_data *data = dev_get_drvdata(dev);
 363         return sprintf(buf, "%u\n", data->vrm);
 364 }
 365 static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
 366                          const char *buf, size_t count)
 367 {
 368         struct adm1025_data *data = dev_get_drvdata(dev);
 369         unsigned long val;
 370         int err;
 371 
 372         err = kstrtoul(buf, 10, &val);
 373         if (err)
 374                 return err;
 375 
 376         if (val > 255)
 377                 return -EINVAL;
 378 
 379         data->vrm = val;
 380         return count;
 381 }
 382 static DEVICE_ATTR_RW(vrm);
 383 
 384 /*
 385  * Real code
 386  */
 387 
 388 static struct attribute *adm1025_attributes[] = {
 389         &sensor_dev_attr_in0_input.dev_attr.attr,
 390         &sensor_dev_attr_in1_input.dev_attr.attr,
 391         &sensor_dev_attr_in2_input.dev_attr.attr,
 392         &sensor_dev_attr_in3_input.dev_attr.attr,
 393         &sensor_dev_attr_in5_input.dev_attr.attr,
 394         &sensor_dev_attr_in0_min.dev_attr.attr,
 395         &sensor_dev_attr_in1_min.dev_attr.attr,
 396         &sensor_dev_attr_in2_min.dev_attr.attr,
 397         &sensor_dev_attr_in3_min.dev_attr.attr,
 398         &sensor_dev_attr_in5_min.dev_attr.attr,
 399         &sensor_dev_attr_in0_max.dev_attr.attr,
 400         &sensor_dev_attr_in1_max.dev_attr.attr,
 401         &sensor_dev_attr_in2_max.dev_attr.attr,
 402         &sensor_dev_attr_in3_max.dev_attr.attr,
 403         &sensor_dev_attr_in5_max.dev_attr.attr,
 404         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 405         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 406         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 407         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 408         &sensor_dev_attr_in5_alarm.dev_attr.attr,
 409         &sensor_dev_attr_temp1_input.dev_attr.attr,
 410         &sensor_dev_attr_temp2_input.dev_attr.attr,
 411         &sensor_dev_attr_temp1_min.dev_attr.attr,
 412         &sensor_dev_attr_temp2_min.dev_attr.attr,
 413         &sensor_dev_attr_temp1_max.dev_attr.attr,
 414         &sensor_dev_attr_temp2_max.dev_attr.attr,
 415         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 416         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 417         &sensor_dev_attr_temp1_fault.dev_attr.attr,
 418         &dev_attr_alarms.attr,
 419         &dev_attr_cpu0_vid.attr,
 420         &dev_attr_vrm.attr,
 421         NULL
 422 };
 423 
 424 static const struct attribute_group adm1025_group = {
 425         .attrs = adm1025_attributes,
 426 };
 427 
 428 static struct attribute *adm1025_attributes_in4[] = {
 429         &sensor_dev_attr_in4_input.dev_attr.attr,
 430         &sensor_dev_attr_in4_min.dev_attr.attr,
 431         &sensor_dev_attr_in4_max.dev_attr.attr,
 432         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 433         NULL
 434 };
 435 
 436 static const struct attribute_group adm1025_group_in4 = {
 437         .attrs = adm1025_attributes_in4,
 438 };
 439 
 440 /* Return 0 if detection is successful, -ENODEV otherwise */
 441 static int adm1025_detect(struct i2c_client *client,
 442                           struct i2c_board_info *info)
 443 {
 444         struct i2c_adapter *adapter = client->adapter;
 445         const char *name;
 446         u8 man_id, chip_id;
 447 
 448         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 449                 return -ENODEV;
 450 
 451         /* Check for unused bits */
 452         if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
 453          || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
 454          || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
 455                 dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
 456                         client->addr);
 457                 return -ENODEV;
 458         }
 459 
 460         /* Identification */
 461         chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
 462         if ((chip_id & 0xF0) != 0x20)
 463                 return -ENODEV;
 464 
 465         man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
 466         if (man_id == 0x41)
 467                 name = "adm1025";
 468         else if (man_id == 0xA1 && client->addr != 0x2E)
 469                 name = "ne1619";
 470         else
 471                 return -ENODEV;
 472 
 473         strlcpy(info->type, name, I2C_NAME_SIZE);
 474 
 475         return 0;
 476 }
 477 
 478 static void adm1025_init_client(struct i2c_client *client)
 479 {
 480         u8 reg;
 481         struct adm1025_data *data = i2c_get_clientdata(client);
 482         int i;
 483 
 484         data->vrm = vid_which_vrm();
 485 
 486         /*
 487          * Set high limits
 488          * Usually we avoid setting limits on driver init, but it happens
 489          * that the ADM1025 comes with stupid default limits (all registers
 490          * set to 0). In case the chip has not gone through any limit
 491          * setting yet, we better set the high limits to the max so that
 492          * no alarm triggers.
 493          */
 494         for (i = 0; i < 6; i++) {
 495                 reg = i2c_smbus_read_byte_data(client,
 496                                                ADM1025_REG_IN_MAX(i));
 497                 if (reg == 0)
 498                         i2c_smbus_write_byte_data(client,
 499                                                   ADM1025_REG_IN_MAX(i),
 500                                                   0xFF);
 501         }
 502         for (i = 0; i < 2; i++) {
 503                 reg = i2c_smbus_read_byte_data(client,
 504                                                ADM1025_REG_TEMP_HIGH(i));
 505                 if (reg == 0)
 506                         i2c_smbus_write_byte_data(client,
 507                                                   ADM1025_REG_TEMP_HIGH(i),
 508                                                   0x7F);
 509         }
 510 
 511         /*
 512          * Start the conversions
 513          */
 514         reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 515         if (!(reg & 0x01))
 516                 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
 517                                           (reg&0x7E)|0x01);
 518 }
 519 
 520 static int adm1025_probe(struct i2c_client *client,
 521                          const struct i2c_device_id *id)
 522 {
 523         struct device *dev = &client->dev;
 524         struct device *hwmon_dev;
 525         struct adm1025_data *data;
 526         u8 config;
 527 
 528         data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL);
 529         if (!data)
 530                 return -ENOMEM;
 531 
 532         i2c_set_clientdata(client, data);
 533         data->client = client;
 534         mutex_init(&data->update_lock);
 535 
 536         /* Initialize the ADM1025 chip */
 537         adm1025_init_client(client);
 538 
 539         /* sysfs hooks */
 540         data->groups[0] = &adm1025_group;
 541         /* Pin 11 is either in4 (+12V) or VID4 */
 542         config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 543         if (!(config & 0x20))
 544                 data->groups[1] = &adm1025_group_in4;
 545 
 546         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 547                                                            data, data->groups);
 548         return PTR_ERR_OR_ZERO(hwmon_dev);
 549 }
 550 
 551 static const struct i2c_device_id adm1025_id[] = {
 552         { "adm1025", adm1025 },
 553         { "ne1619", ne1619 },
 554         { }
 555 };
 556 MODULE_DEVICE_TABLE(i2c, adm1025_id);
 557 
 558 static struct i2c_driver adm1025_driver = {
 559         .class          = I2C_CLASS_HWMON,
 560         .driver = {
 561                 .name   = "adm1025",
 562         },
 563         .probe          = adm1025_probe,
 564         .id_table       = adm1025_id,
 565         .detect         = adm1025_detect,
 566         .address_list   = normal_i2c,
 567 };
 568 
 569 module_i2c_driver(adm1025_driver);
 570 
 571 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
 572 MODULE_DESCRIPTION("ADM1025 driver");
 573 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hwmon/adm1025.c

DEFINITIONS
