tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel / drivers / hwmon / smsc47m192.c
at v3.9-rc2 676 lines 21 kB view raw
1/* 2 * smsc47m192.c - Support for hardware monitoring block of 3 * SMSC LPC47M192 and compatible 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#include <linux/sysfs.h> 34#include <linux/mutex.h> 35 36/* Addresses to scan */ 37static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; 38 39/* SMSC47M192 registers */ 40#define SMSC47M192_REG_IN(nr) ((nr) < 6 ? (0x20 + (nr)) : \ 41 (0x50 + (nr) - 6)) 42#define SMSC47M192_REG_IN_MAX(nr) ((nr) < 6 ? (0x2b + (nr) * 2) : \ 43 (0x54 + (((nr) - 6) * 2))) 44#define SMSC47M192_REG_IN_MIN(nr) ((nr) < 6 ? (0x2c + (nr) * 2) : \ 45 (0x55 + (((nr) - 6) * 2))) 46static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; 47static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; 48static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; 49#define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr) == 2 ? 0x1e : 0x1f) 50#define SMSC47M192_REG_ALARM1 0x41 51#define SMSC47M192_REG_ALARM2 0x42 52#define SMSC47M192_REG_VID 0x47 53#define SMSC47M192_REG_VID4 0x49 54#define SMSC47M192_REG_CONFIG 0x40 55#define SMSC47M192_REG_SFR 0x4f 56#define SMSC47M192_REG_COMPANY_ID 0x3e 57#define SMSC47M192_REG_VERSION 0x3f 58 59/* generalised scaling with integer rounding */ 60static inline int SCALE(long val, int mul, int div) 61{ 62 if (val < 0) 63 return (val * mul - div / 2) / div; 64 else 65 return (val * mul + div / 2) / div; 66} 67 68/* Conversions */ 69 70/* smsc47m192 internally scales voltage measurements */ 71static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; 72 73static inline unsigned int IN_FROM_REG(u8 reg, int n) 74{ 75 return SCALE(reg, nom_mv[n], 192); 76} 77 78static inline u8 IN_TO_REG(unsigned long val, int n) 79{ 80 return clamp_val(SCALE(val, 192, nom_mv[n]), 0, 255); 81} 82 83/* 84 * TEMP: 0.001 degC units (-128C to +127C) 85 * REG: 1C/bit, two's complement 86 */ 87static inline s8 TEMP_TO_REG(int val) 88{ 89 return clamp_val(SCALE(val, 1, 1000), -128000, 127000); 90} 91 92static inline int TEMP_FROM_REG(s8 val) 93{ 94 return val * 1000; 95} 96 97struct smsc47m192_data { 98 struct device *hwmon_dev; 99 struct mutex 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 115static int smsc47m192_probe(struct i2c_client *client, 116 const struct i2c_device_id *id); 117static int smsc47m192_detect(struct i2c_client *client, 118 struct i2c_board_info *info); 119static int smsc47m192_remove(struct i2c_client *client); 120static struct smsc47m192_data *smsc47m192_update_device(struct device *dev); 121 122static const struct i2c_device_id smsc47m192_id[] = { 123 { "smsc47m192", 0 }, 124 { } 125}; 126MODULE_DEVICE_TABLE(i2c, smsc47m192_id); 127 128static struct i2c_driver smsc47m192_driver = { 129 .class = I2C_CLASS_HWMON, 130 .driver = { 131 .name = "smsc47m192", 132 }, 133 .probe = smsc47m192_probe, 134 .remove = smsc47m192_remove, 135 .id_table = smsc47m192_id, 136 .detect = smsc47m192_detect, 137 .address_list = normal_i2c, 138}; 139 140/* Voltages */ 141static ssize_t show_in(struct device *dev, struct device_attribute *attr, 142 char *buf) 143{ 144 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 145 int nr = sensor_attr->index; 146 struct smsc47m192_data *data = smsc47m192_update_device(dev); 147 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); 148} 149 150static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, 151 char *buf) 152{ 153 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 154 int nr = sensor_attr->index; 155 struct smsc47m192_data *data = smsc47m192_update_device(dev); 156 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); 157} 158 159static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, 160 char *buf) 161{ 162 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 163 int nr = sensor_attr->index; 164 struct smsc47m192_data *data = smsc47m192_update_device(dev); 165 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); 166} 167 168static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 169 const char *buf, size_t count) 170{ 171 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 172 int nr = sensor_attr->index; 173 struct i2c_client *client = to_i2c_client(dev); 174 struct smsc47m192_data *data = i2c_get_clientdata(client); 175 unsigned long val; 176 int err; 177 178 err = kstrtoul(buf, 10, &val); 179 if (err) 180 return err; 181 182 mutex_lock(&data->update_lock); 183 data->in_min[nr] = IN_TO_REG(val, nr); 184 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), 185 data->in_min[nr]); 186 mutex_unlock(&data->update_lock); 187 return count; 188} 189 190static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 191 const char *buf, size_t count) 192{ 193 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 194 int nr = sensor_attr->index; 195 struct i2c_client *client = to_i2c_client(dev); 196 struct smsc47m192_data *data = i2c_get_clientdata(client); 197 unsigned long val; 198 int err; 199 200 err = kstrtoul(buf, 10, &val); 201 if (err) 202 return err; 203 204 mutex_lock(&data->update_lock); 205 data->in_max[nr] = IN_TO_REG(val, nr); 206 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), 207 data->in_max[nr]); 208 mutex_unlock(&data->update_lock); 209 return count; 210} 211 212#define show_in_offset(offset) \ 213static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 214 show_in, NULL, offset); \ 215static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ 216 show_in_min, set_in_min, offset); \ 217static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ 218 show_in_max, set_in_max, offset); 219 220show_in_offset(0) 221show_in_offset(1) 222show_in_offset(2) 223show_in_offset(3) 224show_in_offset(4) 225show_in_offset(5) 226show_in_offset(6) 227show_in_offset(7) 228 229/* Temperatures */ 230static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 231 char *buf) 232{ 233 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 234 int nr = sensor_attr->index; 235 struct smsc47m192_data *data = smsc47m192_update_device(dev); 236 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); 237} 238 239static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, 240 char *buf) 241{ 242 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 243 int nr = sensor_attr->index; 244 struct smsc47m192_data *data = smsc47m192_update_device(dev); 245 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 246} 247 248static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, 249 char *buf) 250{ 251 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 252 int nr = sensor_attr->index; 253 struct smsc47m192_data *data = smsc47m192_update_device(dev); 254 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 255} 256 257static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 258 const char *buf, size_t count) 259{ 260 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 261 int nr = sensor_attr->index; 262 struct i2c_client *client = to_i2c_client(dev); 263 struct smsc47m192_data *data = i2c_get_clientdata(client); 264 long val; 265 int err; 266 267 err = kstrtol(buf, 10, &val); 268 if (err) 269 return err; 270 271 mutex_lock(&data->update_lock); 272 data->temp_min[nr] = TEMP_TO_REG(val); 273 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], 274 data->temp_min[nr]); 275 mutex_unlock(&data->update_lock); 276 return count; 277} 278 279static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 280 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 long val; 287 int err; 288 289 err = kstrtol(buf, 10, &val); 290 if (err) 291 return err; 292 293 mutex_lock(&data->update_lock); 294 data->temp_max[nr] = TEMP_TO_REG(val); 295 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], 296 data->temp_max[nr]); 297 mutex_unlock(&data->update_lock); 298 return count; 299} 300 301static ssize_t show_temp_offset(struct device *dev, struct device_attribute 302 *attr, char *buf) 303{ 304 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 305 int nr = sensor_attr->index; 306 struct smsc47m192_data *data = smsc47m192_update_device(dev); 307 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); 308} 309 310static ssize_t set_temp_offset(struct device *dev, struct device_attribute 311 *attr, const char *buf, size_t count) 312{ 313 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 314 int nr = sensor_attr->index; 315 struct i2c_client *client = to_i2c_client(dev); 316 struct smsc47m192_data *data = i2c_get_clientdata(client); 317 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 318 long val; 319 int err; 320 321 err = kstrtol(buf, 10, &val); 322 if (err) 323 return err; 324 325 mutex_lock(&data->update_lock); 326 data->temp_offset[nr] = TEMP_TO_REG(val); 327 if (nr > 1) 328 i2c_smbus_write_byte_data(client, 329 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 330 else if (data->temp_offset[nr] != 0) { 331 /* 332 * offset[0] and offset[1] share the same register, 333 * SFR bit 4 activates offset[0] 334 */ 335 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 336 (sfr & 0xef) | (nr == 0 ? 0x10 : 0)); 337 data->temp_offset[1-nr] = 0; 338 i2c_smbus_write_byte_data(client, 339 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); 340 } else if ((sfr & 0x10) == (nr == 0 ? 0x10 : 0)) 341 i2c_smbus_write_byte_data(client, 342 SMSC47M192_REG_TEMP_OFFSET(nr), 0); 343 mutex_unlock(&data->update_lock); 344 return count; 345} 346 347#define show_temp_index(index) \ 348static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \ 349 show_temp, NULL, index-1); \ 350static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \ 351 show_temp_min, set_temp_min, index-1); \ 352static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \ 353 show_temp_max, set_temp_max, index-1); \ 354static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \ 355 show_temp_offset, set_temp_offset, index-1); 356 357show_temp_index(1) 358show_temp_index(2) 359show_temp_index(3) 360 361/* VID */ 362static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 363 char *buf) 364{ 365 struct smsc47m192_data *data = smsc47m192_update_device(dev); 366 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 367} 368static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 369 370static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, 371 char *buf) 372{ 373 struct smsc47m192_data *data = dev_get_drvdata(dev); 374 return sprintf(buf, "%d\n", data->vrm); 375} 376 377static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 378 const char *buf, size_t count) 379{ 380 struct smsc47m192_data *data = dev_get_drvdata(dev); 381 unsigned long val; 382 int err; 383 384 err = kstrtoul(buf, 10, &val); 385 if (err) 386 return err; 387 388 data->vrm = val; 389 return count; 390} 391static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 392 393/* Alarms */ 394static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 395 char *buf) 396{ 397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); 398 int nr = sensor_attr->index; 399 struct smsc47m192_data *data = smsc47m192_update_device(dev); 400 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); 401} 402 403static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010); 404static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020); 405static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040); 406static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000); 407static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000); 408static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001); 409static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002); 410static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004); 411static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008); 412static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100); 413static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200); 414static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400); 415static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800); 416 417static struct attribute *smsc47m192_attributes[] = { 418 &sensor_dev_attr_in0_input.dev_attr.attr, 419 &sensor_dev_attr_in0_min.dev_attr.attr, 420 &sensor_dev_attr_in0_max.dev_attr.attr, 421 &sensor_dev_attr_in0_alarm.dev_attr.attr, 422 &sensor_dev_attr_in1_input.dev_attr.attr, 423 &sensor_dev_attr_in1_min.dev_attr.attr, 424 &sensor_dev_attr_in1_max.dev_attr.attr, 425 &sensor_dev_attr_in1_alarm.dev_attr.attr, 426 &sensor_dev_attr_in2_input.dev_attr.attr, 427 &sensor_dev_attr_in2_min.dev_attr.attr, 428 &sensor_dev_attr_in2_max.dev_attr.attr, 429 &sensor_dev_attr_in2_alarm.dev_attr.attr, 430 &sensor_dev_attr_in3_input.dev_attr.attr, 431 &sensor_dev_attr_in3_min.dev_attr.attr, 432 &sensor_dev_attr_in3_max.dev_attr.attr, 433 &sensor_dev_attr_in3_alarm.dev_attr.attr, 434 &sensor_dev_attr_in5_input.dev_attr.attr, 435 &sensor_dev_attr_in5_min.dev_attr.attr, 436 &sensor_dev_attr_in5_max.dev_attr.attr, 437 &sensor_dev_attr_in5_alarm.dev_attr.attr, 438 &sensor_dev_attr_in6_input.dev_attr.attr, 439 &sensor_dev_attr_in6_min.dev_attr.attr, 440 &sensor_dev_attr_in6_max.dev_attr.attr, 441 &sensor_dev_attr_in6_alarm.dev_attr.attr, 442 &sensor_dev_attr_in7_input.dev_attr.attr, 443 &sensor_dev_attr_in7_min.dev_attr.attr, 444 &sensor_dev_attr_in7_max.dev_attr.attr, 445 &sensor_dev_attr_in7_alarm.dev_attr.attr, 446 447 &sensor_dev_attr_temp1_input.dev_attr.attr, 448 &sensor_dev_attr_temp1_max.dev_attr.attr, 449 &sensor_dev_attr_temp1_min.dev_attr.attr, 450 &sensor_dev_attr_temp1_offset.dev_attr.attr, 451 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 452 &sensor_dev_attr_temp2_input.dev_attr.attr, 453 &sensor_dev_attr_temp2_max.dev_attr.attr, 454 &sensor_dev_attr_temp2_min.dev_attr.attr, 455 &sensor_dev_attr_temp2_offset.dev_attr.attr, 456 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 457 &sensor_dev_attr_temp2_fault.dev_attr.attr, 458 &sensor_dev_attr_temp3_input.dev_attr.attr, 459 &sensor_dev_attr_temp3_max.dev_attr.attr, 460 &sensor_dev_attr_temp3_min.dev_attr.attr, 461 &sensor_dev_attr_temp3_offset.dev_attr.attr, 462 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 463 &sensor_dev_attr_temp3_fault.dev_attr.attr, 464 465 &dev_attr_cpu0_vid.attr, 466 &dev_attr_vrm.attr, 467 NULL 468}; 469 470static const struct attribute_group smsc47m192_group = { 471 .attrs = smsc47m192_attributes, 472}; 473 474static struct attribute *smsc47m192_attributes_in4[] = { 475 &sensor_dev_attr_in4_input.dev_attr.attr, 476 &sensor_dev_attr_in4_min.dev_attr.attr, 477 &sensor_dev_attr_in4_max.dev_attr.attr, 478 &sensor_dev_attr_in4_alarm.dev_attr.attr, 479 NULL 480}; 481 482static const struct attribute_group smsc47m192_group_in4 = { 483 .attrs = smsc47m192_attributes_in4, 484}; 485 486static void smsc47m192_init_client(struct i2c_client *client) 487{ 488 int i; 489 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 490 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 491 492 /* select cycle mode (pause 1 sec between updates) */ 493 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, 494 (sfr & 0xfd) | 0x02); 495 if (!(config & 0x01)) { 496 /* initialize alarm limits */ 497 for (i = 0; i < 8; i++) { 498 i2c_smbus_write_byte_data(client, 499 SMSC47M192_REG_IN_MIN(i), 0); 500 i2c_smbus_write_byte_data(client, 501 SMSC47M192_REG_IN_MAX(i), 0xff); 502 } 503 for (i = 0; i < 3; i++) { 504 i2c_smbus_write_byte_data(client, 505 SMSC47M192_REG_TEMP_MIN[i], 0x80); 506 i2c_smbus_write_byte_data(client, 507 SMSC47M192_REG_TEMP_MAX[i], 0x7f); 508 } 509 510 /* start monitoring */ 511 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, 512 (config & 0xf7) | 0x01); 513 } 514} 515 516/* Return 0 if detection is successful, -ENODEV otherwise */ 517static int smsc47m192_detect(struct i2c_client *client, 518 struct i2c_board_info *info) 519{ 520 struct i2c_adapter *adapter = client->adapter; 521 int version; 522 523 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 524 return -ENODEV; 525 526 /* Detection criteria from sensors_detect script */ 527 version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION); 528 if (i2c_smbus_read_byte_data(client, 529 SMSC47M192_REG_COMPANY_ID) == 0x55 530 && (version & 0xf0) == 0x20 531 && (i2c_smbus_read_byte_data(client, 532 SMSC47M192_REG_VID) & 0x70) == 0x00 533 && (i2c_smbus_read_byte_data(client, 534 SMSC47M192_REG_VID4) & 0xfe) == 0x80) { 535 dev_info(&adapter->dev, 536 "found SMSC47M192 or compatible, " 537 "version 2, stepping A%d\n", version & 0x0f); 538 } else { 539 dev_dbg(&adapter->dev, 540 "SMSC47M192 detection failed at 0x%02x\n", 541 client->addr); 542 return -ENODEV; 543 } 544 545 strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE); 546 547 return 0; 548} 549 550static int smsc47m192_probe(struct i2c_client *client, 551 const struct i2c_device_id *id) 552{ 553 struct smsc47m192_data *data; 554 int config; 555 int err; 556 557 data = devm_kzalloc(&client->dev, sizeof(struct smsc47m192_data), 558 GFP_KERNEL); 559 if (!data) 560 return -ENOMEM; 561 562 i2c_set_clientdata(client, data); 563 data->vrm = vid_which_vrm(); 564 mutex_init(&data->update_lock); 565 566 /* Initialize the SMSC47M192 chip */ 567 smsc47m192_init_client(client); 568 569 /* Register sysfs hooks */ 570 err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group); 571 if (err) 572 return err; 573 574 /* Pin 110 is either in4 (+12V) or VID4 */ 575 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); 576 if (!(config & 0x20)) { 577 err = sysfs_create_group(&client->dev.kobj, 578 &smsc47m192_group_in4); 579 if (err) 580 goto exit_remove_files; 581 } 582 583 data->hwmon_dev = hwmon_device_register(&client->dev); 584 if (IS_ERR(data->hwmon_dev)) { 585 err = PTR_ERR(data->hwmon_dev); 586 goto exit_remove_files; 587 } 588 589 return 0; 590 591exit_remove_files: 592 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 593 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 594 return err; 595} 596 597static int smsc47m192_remove(struct i2c_client *client) 598{ 599 struct smsc47m192_data *data = i2c_get_clientdata(client); 600 601 hwmon_device_unregister(data->hwmon_dev); 602 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group); 603 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4); 604 605 return 0; 606} 607 608static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) 609{ 610 struct i2c_client *client = to_i2c_client(dev); 611 struct smsc47m192_data *data = i2c_get_clientdata(client); 612 int i, config; 613 614 mutex_lock(&data->update_lock); 615 616 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 617 || !data->valid) { 618 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); 619 620 dev_dbg(&client->dev, "Starting smsc47m192 update\n"); 621 622 for (i = 0; i <= 7; i++) { 623 data->in[i] = i2c_smbus_read_byte_data(client, 624 SMSC47M192_REG_IN(i)); 625 data->in_min[i] = i2c_smbus_read_byte_data(client, 626 SMSC47M192_REG_IN_MIN(i)); 627 data->in_max[i] = i2c_smbus_read_byte_data(client, 628 SMSC47M192_REG_IN_MAX(i)); 629 } 630 for (i = 0; i < 3; i++) { 631 data->temp[i] = i2c_smbus_read_byte_data(client, 632 SMSC47M192_REG_TEMP[i]); 633 data->temp_max[i] = i2c_smbus_read_byte_data(client, 634 SMSC47M192_REG_TEMP_MAX[i]); 635 data->temp_min[i] = i2c_smbus_read_byte_data(client, 636 SMSC47M192_REG_TEMP_MIN[i]); 637 } 638 for (i = 1; i < 3; i++) 639 data->temp_offset[i] = i2c_smbus_read_byte_data(client, 640 SMSC47M192_REG_TEMP_OFFSET(i)); 641 /* 642 * first offset is temp_offset[0] if SFR bit 4 is set, 643 * temp_offset[1] otherwise 644 */ 645 if (sfr & 0x10) { 646 data->temp_offset[0] = data->temp_offset[1]; 647 data->temp_offset[1] = 0; 648 } else 649 data->temp_offset[0] = 0; 650 651 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) 652 & 0x0f; 653 config = i2c_smbus_read_byte_data(client, 654 SMSC47M192_REG_CONFIG); 655 if (config & 0x20) 656 data->vid |= (i2c_smbus_read_byte_data(client, 657 SMSC47M192_REG_VID4) & 0x01) << 4; 658 data->alarms = i2c_smbus_read_byte_data(client, 659 SMSC47M192_REG_ALARM1) | 660 (i2c_smbus_read_byte_data(client, 661 SMSC47M192_REG_ALARM2) << 8); 662 663 data->last_updated = jiffies; 664 data->valid = 1; 665 } 666 667 mutex_unlock(&data->update_lock); 668 669 return data; 670} 671 672module_i2c_driver(smsc47m192_driver); 673 674MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); 675MODULE_DESCRIPTION("SMSC47M192 driver"); 676MODULE_LICENSE("GPL");