1 /* 2 * lm85.c - Part of lm_sensors, Linux kernel modules for hardware 3 * monitoring 4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> 5 * Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com> 6 * Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de> 7 * Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com> 8 * Copyright (C) 2007--2014 Jean Delvare <jdelvare@suse.de> 9 * 10 * Chip details at <http://www.national.com/ds/LM/LM85.pdf> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/of_device.h> 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/jiffies.h> 32 #include <linux/i2c.h> 33 #include <linux/hwmon.h> 34 #include <linux/hwmon-vid.h> 35 #include <linux/hwmon-sysfs.h> 36 #include <linux/err.h> 37 #include <linux/mutex.h> 38 #include <linux/util_macros.h> 39 40 /* Addresses to scan */ 41 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 42 43 enum chips { 44 lm85, lm96000, 45 adm1027, adt7463, adt7468, 46 emc6d100, emc6d102, emc6d103, emc6d103s 47 }; 48 49 /* The LM85 registers */ 50 51 #define LM85_REG_IN(nr) (0x20 + (nr)) 52 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2) 53 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2) 54 55 #define LM85_REG_TEMP(nr) (0x25 + (nr)) 56 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2) 57 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2) 58 59 /* Fan speeds are LSB, MSB (2 bytes) */ 60 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2) 61 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2) 62 63 #define LM85_REG_PWM(nr) (0x30 + (nr)) 64 65 #define LM85_REG_COMPANY 0x3e 66 #define LM85_REG_VERSTEP 0x3f 67 68 #define ADT7468_REG_CFG5 0x7c 69 #define ADT7468_OFF64 (1 << 0) 70 #define ADT7468_HFPWM (1 << 1) 71 #define IS_ADT7468_OFF64(data) \ 72 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64)) 73 #define IS_ADT7468_HFPWM(data) \ 74 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_HFPWM)) 75 76 /* These are the recognized values for the above regs */ 77 #define LM85_COMPANY_NATIONAL 0x01 78 #define LM85_COMPANY_ANALOG_DEV 0x41 79 #define LM85_COMPANY_SMSC 0x5c 80 #define LM85_VERSTEP_LM85C 0x60 81 #define LM85_VERSTEP_LM85B 0x62 82 #define LM85_VERSTEP_LM96000_1 0x68 83 #define LM85_VERSTEP_LM96000_2 0x69 84 #define LM85_VERSTEP_ADM1027 0x60 85 #define LM85_VERSTEP_ADT7463 0x62 86 #define LM85_VERSTEP_ADT7463C 0x6A 87 #define LM85_VERSTEP_ADT7468_1 0x71 88 #define LM85_VERSTEP_ADT7468_2 0x72 89 #define LM85_VERSTEP_EMC6D100_A0 0x60 90 #define LM85_VERSTEP_EMC6D100_A1 0x61 91 #define LM85_VERSTEP_EMC6D102 0x65 92 #define LM85_VERSTEP_EMC6D103_A0 0x68 93 #define LM85_VERSTEP_EMC6D103_A1 0x69 94 #define LM85_VERSTEP_EMC6D103S 0x6A /* Also known as EMC6D103:A2 */ 95 96 #define LM85_REG_CONFIG 0x40 97 98 #define LM85_REG_ALARM1 0x41 99 #define LM85_REG_ALARM2 0x42 100 101 #define LM85_REG_VID 0x43 102 103 /* Automated FAN control */ 104 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr)) 105 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr)) 106 #define LM85_REG_AFAN_SPIKE1 0x62 107 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr)) 108 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr)) 109 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr)) 110 #define LM85_REG_AFAN_HYST1 0x6d 111 #define LM85_REG_AFAN_HYST2 0x6e 112 113 #define ADM1027_REG_EXTEND_ADC1 0x76 114 #define ADM1027_REG_EXTEND_ADC2 0x77 115 116 #define EMC6D100_REG_ALARM3 0x7d 117 /* IN5, IN6 and IN7 */ 118 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5)) 119 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2) 120 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2) 121 #define EMC6D102_REG_EXTEND_ADC1 0x85 122 #define EMC6D102_REG_EXTEND_ADC2 0x86 123 #define EMC6D102_REG_EXTEND_ADC3 0x87 124 #define EMC6D102_REG_EXTEND_ADC4 0x88 125 126 /* 127 * Conversions. Rounding and limit checking is only done on the TO_REG 128 * variants. Note that you should be a bit careful with which arguments 129 * these macros are called: arguments may be evaluated more than once. 130 */ 131 132 /* IN are scaled according to built-in resistors */ 133 static const int lm85_scaling[] = { /* .001 Volts */ 134 2500, 2250, 3300, 5000, 12000, 135 3300, 1500, 1800 /*EMC6D100*/ 136 }; 137 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from)) 138 139 #define INS_TO_REG(n, val) \ 140 SCALE(clamp_val(val, 0, 255 * lm85_scaling[n] / 192), \ 141 lm85_scaling[n], 192) 142 143 #define INSEXT_FROM_REG(n, val, ext) \ 144 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n]) 145 146 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n]) 147 148 /* FAN speed is measured using 90kHz clock */ 149 static inline u16 FAN_TO_REG(unsigned long val) 150 { 151 if (!val) 152 return 0xffff; 153 return clamp_val(5400000 / val, 1, 0xfffe); 154 } 155 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \ 156 5400000 / (val)) 157 158 /* Temperature is reported in .001 degC increments */ 159 #define TEMP_TO_REG(val) \ 160 DIV_ROUND_CLOSEST(clamp_val((val), -127000, 127000), 1000) 161 #define TEMPEXT_FROM_REG(val, ext) \ 162 SCALE(((val) << 4) + (ext), 16, 1000) 163 #define TEMP_FROM_REG(val) ((val) * 1000) 164 165 #define PWM_TO_REG(val) clamp_val(val, 0, 255) 166 #define PWM_FROM_REG(val) (val) 167 168 /* 169 * ZONEs have the following parameters: 170 * Limit (low) temp, 1. degC 171 * Hysteresis (below limit), 1. degC (0-15) 172 * Range of speed control, .1 degC (2-80) 173 * Critical (high) temp, 1. degC 174 * 175 * FAN PWMs have the following parameters: 176 * Reference Zone, 1, 2, 3, etc. 177 * Spinup time, .05 sec 178 * PWM value at limit/low temp, 1 count 179 * PWM Frequency, 1. Hz 180 * PWM is Min or OFF below limit, flag 181 * Invert PWM output, flag 182 * 183 * Some chips filter the temp, others the fan. 184 * Filter constant (or disabled) .1 seconds 185 */ 186 187 /* These are the zone temperature range encodings in .001 degree C */ 188 static const int lm85_range_map[] = { 189 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000, 190 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000 191 }; 192 193 static int RANGE_TO_REG(long range) 194 { 195 return find_closest(range, lm85_range_map, ARRAY_SIZE(lm85_range_map)); 196 } 197 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f] 198 199 /* These are the PWM frequency encodings */ 200 static const int lm85_freq_map[] = { /* 1 Hz */ 201 10, 15, 23, 30, 38, 47, 61, 94 202 }; 203 204 static const int lm96000_freq_map[] = { /* 1 Hz */ 205 10, 15, 23, 30, 38, 47, 61, 94, 206 22500, 24000, 25700, 25700, 27700, 27700, 30000, 30000 207 }; 208 209 static const int adm1027_freq_map[] = { /* 1 Hz */ 210 11, 15, 22, 29, 35, 44, 59, 88 211 }; 212 213 static int FREQ_TO_REG(const int *map, 214 unsigned int map_size, unsigned long freq) 215 { 216 return find_closest(freq, map, map_size); 217 } 218 219 static int FREQ_FROM_REG(const int *map, unsigned int map_size, u8 reg) 220 { 221 return map[reg % map_size]; 222 } 223 224 /* 225 * Since we can't use strings, I'm abusing these numbers 226 * to stand in for the following meanings: 227 * 1 -- PWM responds to Zone 1 228 * 2 -- PWM responds to Zone 2 229 * 3 -- PWM responds to Zone 3 230 * 23 -- PWM responds to the higher temp of Zone 2 or 3 231 * 123 -- PWM responds to highest of Zone 1, 2, or 3 232 * 0 -- PWM is always at 0% (ie, off) 233 * -1 -- PWM is always at 100% 234 * -2 -- PWM responds to manual control 235 */ 236 237 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 }; 238 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5] 239 240 static int ZONE_TO_REG(int zone) 241 { 242 int i; 243 244 for (i = 0; i <= 7; ++i) 245 if (zone == lm85_zone_map[i]) 246 break; 247 if (i > 7) /* Not found. */ 248 i = 3; /* Always 100% */ 249 return i << 5; 250 } 251 252 #define HYST_TO_REG(val) clamp_val(((val) + 500) / 1000, 0, 15) 253 #define HYST_FROM_REG(val) ((val) * 1000) 254 255 /* 256 * Chip sampling rates 257 * 258 * Some sensors are not updated more frequently than once per second 259 * so it doesn't make sense to read them more often than that. 260 * We cache the results and return the saved data if the driver 261 * is called again before a second has elapsed. 262 * 263 * Also, there is significant configuration data for this chip 264 * given the automatic PWM fan control that is possible. There 265 * are about 47 bytes of config data to only 22 bytes of actual 266 * readings. So, we keep the config data up to date in the cache 267 * when it is written and only sample it once every 1 *minute* 268 */ 269 #define LM85_DATA_INTERVAL (HZ + HZ / 2) 270 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ) 271 272 /* 273 * LM85 can automatically adjust fan speeds based on temperature 274 * This structure encapsulates an entire Zone config. There are 275 * three zones (one for each temperature input) on the lm85 276 */ 277 struct lm85_zone { 278 s8 limit; /* Low temp limit */ 279 u8 hyst; /* Low limit hysteresis. (0-15) */ 280 u8 range; /* Temp range, encoded */ 281 s8 critical; /* "All fans ON" temp limit */ 282 u8 max_desired; /* 283 * Actual "max" temperature specified. Preserved 284 * to prevent "drift" as other autofan control 285 * values change. 286 */ 287 }; 288 289 struct lm85_autofan { 290 u8 config; /* Register value */ 291 u8 min_pwm; /* Minimum PWM value, encoded */ 292 u8 min_off; /* Min PWM or OFF below "limit", flag */ 293 }; 294 295 /* 296 * For each registered chip, we need to keep some data in memory. 297 * The structure is dynamically allocated. 298 */ 299 struct lm85_data { 300 struct i2c_client *client; 301 const struct attribute_group *groups[6]; 302 const int *freq_map; 303 unsigned int freq_map_size; 304 305 enum chips type; 306 307 bool has_vid5; /* true if VID5 is configured for ADT7463 or ADT7468 */ 308 309 struct mutex update_lock; 310 int valid; /* !=0 if following fields are valid */ 311 unsigned long last_reading; /* In jiffies */ 312 unsigned long last_config; /* In jiffies */ 313 314 u8 in[8]; /* Register value */ 315 u8 in_max[8]; /* Register value */ 316 u8 in_min[8]; /* Register value */ 317 s8 temp[3]; /* Register value */ 318 s8 temp_min[3]; /* Register value */ 319 s8 temp_max[3]; /* Register value */ 320 u16 fan[4]; /* Register value */ 321 u16 fan_min[4]; /* Register value */ 322 u8 pwm[3]; /* Register value */ 323 u8 pwm_freq[3]; /* Register encoding */ 324 u8 temp_ext[3]; /* Decoded values */ 325 u8 in_ext[8]; /* Decoded values */ 326 u8 vid; /* Register value */ 327 u8 vrm; /* VRM version */ 328 u32 alarms; /* Register encoding, combined */ 329 u8 cfg5; /* Config Register 5 on ADT7468 */ 330 struct lm85_autofan autofan[3]; 331 struct lm85_zone zone[3]; 332 }; 333 334 static int lm85_read_value(struct i2c_client *client, u8 reg) 335 { 336 int res; 337 338 /* What size location is it? */ 339 switch (reg) { 340 case LM85_REG_FAN(0): /* Read WORD data */ 341 case LM85_REG_FAN(1): 342 case LM85_REG_FAN(2): 343 case LM85_REG_FAN(3): 344 case LM85_REG_FAN_MIN(0): 345 case LM85_REG_FAN_MIN(1): 346 case LM85_REG_FAN_MIN(2): 347 case LM85_REG_FAN_MIN(3): 348 case LM85_REG_ALARM1: /* Read both bytes at once */ 349 res = i2c_smbus_read_byte_data(client, reg) & 0xff; 350 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8; 351 break; 352 default: /* Read BYTE data */ 353 res = i2c_smbus_read_byte_data(client, reg); 354 break; 355 } 356 357 return res; 358 } 359 360 static void lm85_write_value(struct i2c_client *client, u8 reg, int value) 361 { 362 switch (reg) { 363 case LM85_REG_FAN(0): /* Write WORD data */ 364 case LM85_REG_FAN(1): 365 case LM85_REG_FAN(2): 366 case LM85_REG_FAN(3): 367 case LM85_REG_FAN_MIN(0): 368 case LM85_REG_FAN_MIN(1): 369 case LM85_REG_FAN_MIN(2): 370 case LM85_REG_FAN_MIN(3): 371 /* NOTE: ALARM is read only, so not included here */ 372 i2c_smbus_write_byte_data(client, reg, value & 0xff); 373 i2c_smbus_write_byte_data(client, reg + 1, value >> 8); 374 break; 375 default: /* Write BYTE data */ 376 i2c_smbus_write_byte_data(client, reg, value); 377 break; 378 } 379 } 380 381 static struct lm85_data *lm85_update_device(struct device *dev) 382 { 383 struct lm85_data *data = dev_get_drvdata(dev); 384 struct i2c_client *client = data->client; 385 int i; 386 387 mutex_lock(&data->update_lock); 388 389 if (!data->valid || 390 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) { 391 /* Things that change quickly */ 392 dev_dbg(&client->dev, "Reading sensor values\n"); 393 394 /* 395 * Have to read extended bits first to "freeze" the 396 * more significant bits that are read later. 397 * There are 2 additional resolution bits per channel and we 398 * have room for 4, so we shift them to the left. 399 */ 400 if (data->type == adm1027 || data->type == adt7463 || 401 data->type == adt7468) { 402 int ext1 = lm85_read_value(client, 403 ADM1027_REG_EXTEND_ADC1); 404 int ext2 = lm85_read_value(client, 405 ADM1027_REG_EXTEND_ADC2); 406 int val = (ext1 << 8) + ext2; 407 408 for (i = 0; i <= 4; i++) 409 data->in_ext[i] = 410 ((val >> (i * 2)) & 0x03) << 2; 411 412 for (i = 0; i <= 2; i++) 413 data->temp_ext[i] = 414 (val >> ((i + 4) * 2)) & 0x0c; 415 } 416 417 data->vid = lm85_read_value(client, LM85_REG_VID); 418 419 for (i = 0; i <= 3; ++i) { 420 data->in[i] = 421 lm85_read_value(client, LM85_REG_IN(i)); 422 data->fan[i] = 423 lm85_read_value(client, LM85_REG_FAN(i)); 424 } 425 426 if (!data->has_vid5) 427 data->in[4] = lm85_read_value(client, LM85_REG_IN(4)); 428 429 if (data->type == adt7468) 430 data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5); 431 432 for (i = 0; i <= 2; ++i) { 433 data->temp[i] = 434 lm85_read_value(client, LM85_REG_TEMP(i)); 435 data->pwm[i] = 436 lm85_read_value(client, LM85_REG_PWM(i)); 437 438 if (IS_ADT7468_OFF64(data)) 439 data->temp[i] -= 64; 440 } 441 442 data->alarms = lm85_read_value(client, LM85_REG_ALARM1); 443 444 if (data->type == emc6d100) { 445 /* Three more voltage sensors */ 446 for (i = 5; i <= 7; ++i) { 447 data->in[i] = lm85_read_value(client, 448 EMC6D100_REG_IN(i)); 449 } 450 /* More alarm bits */ 451 data->alarms |= lm85_read_value(client, 452 EMC6D100_REG_ALARM3) << 16; 453 } else if (data->type == emc6d102 || data->type == emc6d103 || 454 data->type == emc6d103s) { 455 /* 456 * Have to read LSB bits after the MSB ones because 457 * the reading of the MSB bits has frozen the 458 * LSBs (backward from the ADM1027). 459 */ 460 int ext1 = lm85_read_value(client, 461 EMC6D102_REG_EXTEND_ADC1); 462 int ext2 = lm85_read_value(client, 463 EMC6D102_REG_EXTEND_ADC2); 464 int ext3 = lm85_read_value(client, 465 EMC6D102_REG_EXTEND_ADC3); 466 int ext4 = lm85_read_value(client, 467 EMC6D102_REG_EXTEND_ADC4); 468 data->in_ext[0] = ext3 & 0x0f; 469 data->in_ext[1] = ext4 & 0x0f; 470 data->in_ext[2] = ext4 >> 4; 471 data->in_ext[3] = ext3 >> 4; 472 data->in_ext[4] = ext2 >> 4; 473 474 data->temp_ext[0] = ext1 & 0x0f; 475 data->temp_ext[1] = ext2 & 0x0f; 476 data->temp_ext[2] = ext1 >> 4; 477 } 478 479 data->last_reading = jiffies; 480 } /* last_reading */ 481 482 if (!data->valid || 483 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) { 484 /* Things that don't change often */ 485 dev_dbg(&client->dev, "Reading config values\n"); 486 487 for (i = 0; i <= 3; ++i) { 488 data->in_min[i] = 489 lm85_read_value(client, LM85_REG_IN_MIN(i)); 490 data->in_max[i] = 491 lm85_read_value(client, LM85_REG_IN_MAX(i)); 492 data->fan_min[i] = 493 lm85_read_value(client, LM85_REG_FAN_MIN(i)); 494 } 495 496 if (!data->has_vid5) { 497 data->in_min[4] = lm85_read_value(client, 498 LM85_REG_IN_MIN(4)); 499 data->in_max[4] = lm85_read_value(client, 500 LM85_REG_IN_MAX(4)); 501 } 502 503 if (data->type == emc6d100) { 504 for (i = 5; i <= 7; ++i) { 505 data->in_min[i] = lm85_read_value(client, 506 EMC6D100_REG_IN_MIN(i)); 507 data->in_max[i] = lm85_read_value(client, 508 EMC6D100_REG_IN_MAX(i)); 509 } 510 } 511 512 for (i = 0; i <= 2; ++i) { 513 int val; 514 515 data->temp_min[i] = 516 lm85_read_value(client, LM85_REG_TEMP_MIN(i)); 517 data->temp_max[i] = 518 lm85_read_value(client, LM85_REG_TEMP_MAX(i)); 519 520 data->autofan[i].config = 521 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i)); 522 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i)); 523 data->pwm_freq[i] = val % data->freq_map_size; 524 data->zone[i].range = val >> 4; 525 data->autofan[i].min_pwm = 526 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i)); 527 data->zone[i].limit = 528 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i)); 529 data->zone[i].critical = 530 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i)); 531 532 if (IS_ADT7468_OFF64(data)) { 533 data->temp_min[i] -= 64; 534 data->temp_max[i] -= 64; 535 data->zone[i].limit -= 64; 536 data->zone[i].critical -= 64; 537 } 538 } 539 540 if (data->type != emc6d103s) { 541 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1); 542 data->autofan[0].min_off = (i & 0x20) != 0; 543 data->autofan[1].min_off = (i & 0x40) != 0; 544 data->autofan[2].min_off = (i & 0x80) != 0; 545 546 i = lm85_read_value(client, LM85_REG_AFAN_HYST1); 547 data->zone[0].hyst = i >> 4; 548 data->zone[1].hyst = i & 0x0f; 549 550 i = lm85_read_value(client, LM85_REG_AFAN_HYST2); 551 data->zone[2].hyst = i >> 4; 552 } 553 554 data->last_config = jiffies; 555 } /* last_config */ 556 557 data->valid = 1; 558 559 mutex_unlock(&data->update_lock); 560 561 return data; 562 } 563 564 /* 4 Fans */ 565 static ssize_t fan_show(struct device *dev, struct device_attribute *attr, 566 char *buf) 567 { 568 int nr = to_sensor_dev_attr(attr)->index; 569 struct lm85_data *data = lm85_update_device(dev); 570 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr])); 571 } 572 573 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, 574 char *buf) 575 { 576 int nr = to_sensor_dev_attr(attr)->index; 577 struct lm85_data *data = lm85_update_device(dev); 578 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr])); 579 } 580 581 static ssize_t fan_min_store(struct device *dev, 582 struct device_attribute *attr, const char *buf, 583 size_t count) 584 { 585 int nr = to_sensor_dev_attr(attr)->index; 586 struct lm85_data *data = dev_get_drvdata(dev); 587 struct i2c_client *client = data->client; 588 unsigned long val; 589 int err; 590 591 err = kstrtoul(buf, 10, &val); 592 if (err) 593 return err; 594 595 mutex_lock(&data->update_lock); 596 data->fan_min[nr] = FAN_TO_REG(val); 597 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]); 598 mutex_unlock(&data->update_lock); 599 return count; 600 } 601 602 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 603 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 604 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 605 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 606 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); 607 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2); 608 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3); 609 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3); 610 611 /* vid, vrm, alarms */ 612 613 static ssize_t cpu0_vid_show(struct device *dev, 614 struct device_attribute *attr, char *buf) 615 { 616 struct lm85_data *data = lm85_update_device(dev); 617 int vid; 618 619 if (data->has_vid5) { 620 /* 6-pin VID (VRM 10) */ 621 vid = vid_from_reg(data->vid & 0x3f, data->vrm); 622 } else { 623 /* 5-pin VID (VRM 9) */ 624 vid = vid_from_reg(data->vid & 0x1f, data->vrm); 625 } 626 627 return sprintf(buf, "%d\n", vid); 628 } 629 630 static DEVICE_ATTR_RO(cpu0_vid); 631 632 static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, 633 char *buf) 634 { 635 struct lm85_data *data = dev_get_drvdata(dev); 636 return sprintf(buf, "%ld\n", (long) data->vrm); 637 } 638 639 static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, 640 const char *buf, size_t count) 641 { 642 struct lm85_data *data = dev_get_drvdata(dev); 643 unsigned long val; 644 int err; 645 646 err = kstrtoul(buf, 10, &val); 647 if (err) 648 return err; 649 650 if (val > 255) 651 return -EINVAL; 652 653 data->vrm = val; 654 return count; 655 } 656 657 static DEVICE_ATTR_RW(vrm); 658 659 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, 660 char *buf) 661 { 662 struct lm85_data *data = lm85_update_device(dev); 663 return sprintf(buf, "%u\n", data->alarms); 664 } 665 666 static DEVICE_ATTR_RO(alarms); 667 668 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 669 char *buf) 670 { 671 int nr = to_sensor_dev_attr(attr)->index; 672 struct lm85_data *data = lm85_update_device(dev); 673 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); 674 } 675 676 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 677 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 678 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 679 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 680 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 681 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 18); 682 static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 16); 683 static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm, 17); 684 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 685 static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14); 686 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5); 687 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 6); 688 static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 15); 689 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 10); 690 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 11); 691 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, 12); 692 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, 13); 693 694 /* pwm */ 695 696 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr, 697 char *buf) 698 { 699 int nr = to_sensor_dev_attr(attr)->index; 700 struct lm85_data *data = lm85_update_device(dev); 701 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); 702 } 703 704 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr, 705 const char *buf, size_t count) 706 { 707 int nr = to_sensor_dev_attr(attr)->index; 708 struct lm85_data *data = dev_get_drvdata(dev); 709 struct i2c_client *client = data->client; 710 unsigned long val; 711 int err; 712 713 err = kstrtoul(buf, 10, &val); 714 if (err) 715 return err; 716 717 mutex_lock(&data->update_lock); 718 data->pwm[nr] = PWM_TO_REG(val); 719 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]); 720 mutex_unlock(&data->update_lock); 721 return count; 722 } 723 724 static ssize_t pwm_enable_show(struct device *dev, 725 struct device_attribute *attr, char *buf) 726 { 727 int nr = to_sensor_dev_attr(attr)->index; 728 struct lm85_data *data = lm85_update_device(dev); 729 int pwm_zone, enable; 730 731 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config); 732 switch (pwm_zone) { 733 case -1: /* PWM is always at 100% */ 734 enable = 0; 735 break; 736 case 0: /* PWM is always at 0% */ 737 case -2: /* PWM responds to manual control */ 738 enable = 1; 739 break; 740 default: /* PWM in automatic mode */ 741 enable = 2; 742 } 743 return sprintf(buf, "%d\n", enable); 744 } 745 746 static ssize_t pwm_enable_store(struct device *dev, 747 struct device_attribute *attr, 748 const char *buf, size_t count) 749 { 750 int nr = to_sensor_dev_attr(attr)->index; 751 struct lm85_data *data = dev_get_drvdata(dev); 752 struct i2c_client *client = data->client; 753 u8 config; 754 unsigned long val; 755 int err; 756 757 err = kstrtoul(buf, 10, &val); 758 if (err) 759 return err; 760 761 switch (val) { 762 case 0: 763 config = 3; 764 break; 765 case 1: 766 config = 7; 767 break; 768 case 2: 769 /* 770 * Here we have to choose arbitrarily one of the 5 possible 771 * configurations; I go for the safest 772 */ 773 config = 6; 774 break; 775 default: 776 return -EINVAL; 777 } 778 779 mutex_lock(&data->update_lock); 780 data->autofan[nr].config = lm85_read_value(client, 781 LM85_REG_AFAN_CONFIG(nr)); 782 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0) 783 | (config << 5); 784 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr), 785 data->autofan[nr].config); 786 mutex_unlock(&data->update_lock); 787 return count; 788 } 789 790 static ssize_t pwm_freq_show(struct device *dev, 791 struct device_attribute *attr, char *buf) 792 { 793 int nr = to_sensor_dev_attr(attr)->index; 794 struct lm85_data *data = lm85_update_device(dev); 795 int freq; 796 797 if (IS_ADT7468_HFPWM(data)) 798 freq = 22500; 799 else 800 freq = FREQ_FROM_REG(data->freq_map, data->freq_map_size, 801 data->pwm_freq[nr]); 802 803 return sprintf(buf, "%d\n", freq); 804 } 805 806 static ssize_t pwm_freq_store(struct device *dev, 807 struct device_attribute *attr, const char *buf, 808 size_t count) 809 { 810 int nr = to_sensor_dev_attr(attr)->index; 811 struct lm85_data *data = dev_get_drvdata(dev); 812 struct i2c_client *client = data->client; 813 unsigned long val; 814 int err; 815 816 err = kstrtoul(buf, 10, &val); 817 if (err) 818 return err; 819 820 mutex_lock(&data->update_lock); 821 /* 822 * The ADT7468 has a special high-frequency PWM output mode, 823 * where all PWM outputs are driven by a 22.5 kHz clock. 824 * This might confuse the user, but there's not much we can do. 825 */ 826 if (data->type == adt7468 && val >= 11300) { /* High freq. mode */ 827 data->cfg5 &= ~ADT7468_HFPWM; 828 lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5); 829 } else { /* Low freq. mode */ 830 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, 831 data->freq_map_size, val); 832 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 833 (data->zone[nr].range << 4) 834 | data->pwm_freq[nr]); 835 if (data->type == adt7468) { 836 data->cfg5 |= ADT7468_HFPWM; 837 lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5); 838 } 839 } 840 mutex_unlock(&data->update_lock); 841 return count; 842 } 843 844 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); 845 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0); 846 static SENSOR_DEVICE_ATTR_RW(pwm1_freq, pwm_freq, 0); 847 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); 848 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1); 849 static SENSOR_DEVICE_ATTR_RW(pwm2_freq, pwm_freq, 1); 850 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2); 851 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2); 852 static SENSOR_DEVICE_ATTR_RW(pwm3_freq, pwm_freq, 2); 853 854 /* Voltages */ 855 856 static ssize_t in_show(struct device *dev, struct device_attribute *attr, 857 char *buf) 858 { 859 int nr = to_sensor_dev_attr(attr)->index; 860 struct lm85_data *data = lm85_update_device(dev); 861 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr], 862 data->in_ext[nr])); 863 } 864 865 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, 866 char *buf) 867 { 868 int nr = to_sensor_dev_attr(attr)->index; 869 struct lm85_data *data = lm85_update_device(dev); 870 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr])); 871 } 872 873 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, 874 const char *buf, size_t count) 875 { 876 int nr = to_sensor_dev_attr(attr)->index; 877 struct lm85_data *data = dev_get_drvdata(dev); 878 struct i2c_client *client = data->client; 879 long val; 880 int err; 881 882 err = kstrtol(buf, 10, &val); 883 if (err) 884 return err; 885 886 mutex_lock(&data->update_lock); 887 data->in_min[nr] = INS_TO_REG(nr, val); 888 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]); 889 mutex_unlock(&data->update_lock); 890 return count; 891 } 892 893 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, 894 char *buf) 895 { 896 int nr = to_sensor_dev_attr(attr)->index; 897 struct lm85_data *data = lm85_update_device(dev); 898 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr])); 899 } 900 901 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, 902 const char *buf, size_t count) 903 { 904 int nr = to_sensor_dev_attr(attr)->index; 905 struct lm85_data *data = dev_get_drvdata(dev); 906 struct i2c_client *client = data->client; 907 long val; 908 int err; 909 910 err = kstrtol(buf, 10, &val); 911 if (err) 912 return err; 913 914 mutex_lock(&data->update_lock); 915 data->in_max[nr] = INS_TO_REG(nr, val); 916 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]); 917 mutex_unlock(&data->update_lock); 918 return count; 919 } 920 921 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 922 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 923 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 924 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 925 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 926 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 927 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 928 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 929 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 930 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 931 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 932 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 933 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 934 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 935 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 936 static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); 937 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); 938 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); 939 static SENSOR_DEVICE_ATTR_RO(in6_input, in, 6); 940 static SENSOR_DEVICE_ATTR_RW(in6_min, in_min, 6); 941 static SENSOR_DEVICE_ATTR_RW(in6_max, in_max, 6); 942 static SENSOR_DEVICE_ATTR_RO(in7_input, in, 7); 943 static SENSOR_DEVICE_ATTR_RW(in7_min, in_min, 7); 944 static SENSOR_DEVICE_ATTR_RW(in7_max, in_max, 7); 945 946 /* Temps */ 947 948 static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 949 char *buf) 950 { 951 int nr = to_sensor_dev_attr(attr)->index; 952 struct lm85_data *data = lm85_update_device(dev); 953 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr], 954 data->temp_ext[nr])); 955 } 956 957 static ssize_t temp_min_show(struct device *dev, 958 struct device_attribute *attr, char *buf) 959 { 960 int nr = to_sensor_dev_attr(attr)->index; 961 struct lm85_data *data = lm85_update_device(dev); 962 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); 963 } 964 965 static ssize_t temp_min_store(struct device *dev, 966 struct device_attribute *attr, const char *buf, 967 size_t count) 968 { 969 int nr = to_sensor_dev_attr(attr)->index; 970 struct lm85_data *data = dev_get_drvdata(dev); 971 struct i2c_client *client = data->client; 972 long val; 973 int err; 974 975 err = kstrtol(buf, 10, &val); 976 if (err) 977 return err; 978 979 if (IS_ADT7468_OFF64(data)) 980 val += 64; 981 982 mutex_lock(&data->update_lock); 983 data->temp_min[nr] = TEMP_TO_REG(val); 984 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]); 985 mutex_unlock(&data->update_lock); 986 return count; 987 } 988 989 static ssize_t temp_max_show(struct device *dev, 990 struct device_attribute *attr, char *buf) 991 { 992 int nr = to_sensor_dev_attr(attr)->index; 993 struct lm85_data *data = lm85_update_device(dev); 994 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); 995 } 996 997 static ssize_t temp_max_store(struct device *dev, 998 struct device_attribute *attr, const char *buf, 999 size_t count) 1000 { 1001 int nr = to_sensor_dev_attr(attr)->index; 1002 struct lm85_data *data = dev_get_drvdata(dev); 1003 struct i2c_client *client = data->client; 1004 long val; 1005 int err; 1006 1007 err = kstrtol(buf, 10, &val); 1008 if (err) 1009 return err; 1010 1011 if (IS_ADT7468_OFF64(data)) 1012 val += 64; 1013 1014 mutex_lock(&data->update_lock); 1015 data->temp_max[nr] = TEMP_TO_REG(val); 1016 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]); 1017 mutex_unlock(&data->update_lock); 1018 return count; 1019 } 1020 1021 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); 1022 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); 1023 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); 1024 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 1025 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); 1026 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 1027 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 1028 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); 1029 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 1030 1031 /* Automatic PWM control */ 1032 1033 static ssize_t pwm_auto_channels_show(struct device *dev, 1034 struct device_attribute *attr, 1035 char *buf) 1036 { 1037 int nr = to_sensor_dev_attr(attr)->index; 1038 struct lm85_data *data = lm85_update_device(dev); 1039 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config)); 1040 } 1041 1042 static ssize_t pwm_auto_channels_store(struct device *dev, 1043 struct device_attribute *attr, 1044 const char *buf, size_t count) 1045 { 1046 int nr = to_sensor_dev_attr(attr)->index; 1047 struct lm85_data *data = dev_get_drvdata(dev); 1048 struct i2c_client *client = data->client; 1049 long val; 1050 int err; 1051 1052 err = kstrtol(buf, 10, &val); 1053 if (err) 1054 return err; 1055 1056 mutex_lock(&data->update_lock); 1057 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0)) 1058 | ZONE_TO_REG(val); 1059 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr), 1060 data->autofan[nr].config); 1061 mutex_unlock(&data->update_lock); 1062 return count; 1063 } 1064 1065 static ssize_t pwm_auto_pwm_min_show(struct device *dev, 1066 struct device_attribute *attr, char *buf) 1067 { 1068 int nr = to_sensor_dev_attr(attr)->index; 1069 struct lm85_data *data = lm85_update_device(dev); 1070 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm)); 1071 } 1072 1073 static ssize_t pwm_auto_pwm_min_store(struct device *dev, 1074 struct device_attribute *attr, 1075 const char *buf, size_t count) 1076 { 1077 int nr = to_sensor_dev_attr(attr)->index; 1078 struct lm85_data *data = dev_get_drvdata(dev); 1079 struct i2c_client *client = data->client; 1080 unsigned long val; 1081 int err; 1082 1083 err = kstrtoul(buf, 10, &val); 1084 if (err) 1085 return err; 1086 1087 mutex_lock(&data->update_lock); 1088 data->autofan[nr].min_pwm = PWM_TO_REG(val); 1089 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr), 1090 data->autofan[nr].min_pwm); 1091 mutex_unlock(&data->update_lock); 1092 return count; 1093 } 1094 1095 static ssize_t pwm_auto_pwm_minctl_show(struct device *dev, 1096 struct device_attribute *attr, 1097 char *buf) 1098 { 1099 int nr = to_sensor_dev_attr(attr)->index; 1100 struct lm85_data *data = lm85_update_device(dev); 1101 return sprintf(buf, "%d\n", data->autofan[nr].min_off); 1102 } 1103 1104 static ssize_t pwm_auto_pwm_minctl_store(struct device *dev, 1105 struct device_attribute *attr, 1106 const char *buf, size_t count) 1107 { 1108 int nr = to_sensor_dev_attr(attr)->index; 1109 struct lm85_data *data = dev_get_drvdata(dev); 1110 struct i2c_client *client = data->client; 1111 u8 tmp; 1112 long val; 1113 int err; 1114 1115 err = kstrtol(buf, 10, &val); 1116 if (err) 1117 return err; 1118 1119 mutex_lock(&data->update_lock); 1120 data->autofan[nr].min_off = val; 1121 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1); 1122 tmp &= ~(0x20 << nr); 1123 if (data->autofan[nr].min_off) 1124 tmp |= 0x20 << nr; 1125 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp); 1126 mutex_unlock(&data->update_lock); 1127 return count; 1128 } 1129 1130 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels, pwm_auto_channels, 0); 1131 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_pwm_min, pwm_auto_pwm_min, 0); 1132 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_pwm_minctl, pwm_auto_pwm_minctl, 0); 1133 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels, pwm_auto_channels, 1); 1134 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_pwm_min, pwm_auto_pwm_min, 1); 1135 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_pwm_minctl, pwm_auto_pwm_minctl, 1); 1136 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels, pwm_auto_channels, 2); 1137 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_pwm_min, pwm_auto_pwm_min, 2); 1138 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_pwm_minctl, pwm_auto_pwm_minctl, 2); 1139 1140 /* Temperature settings for automatic PWM control */ 1141 1142 static ssize_t temp_auto_temp_off_show(struct device *dev, 1143 struct device_attribute *attr, 1144 char *buf) 1145 { 1146 int nr = to_sensor_dev_attr(attr)->index; 1147 struct lm85_data *data = lm85_update_device(dev); 1148 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) - 1149 HYST_FROM_REG(data->zone[nr].hyst)); 1150 } 1151 1152 static ssize_t temp_auto_temp_off_store(struct device *dev, 1153 struct device_attribute *attr, 1154 const char *buf, size_t count) 1155 { 1156 int nr = to_sensor_dev_attr(attr)->index; 1157 struct lm85_data *data = dev_get_drvdata(dev); 1158 struct i2c_client *client = data->client; 1159 int min; 1160 long val; 1161 int err; 1162 1163 err = kstrtol(buf, 10, &val); 1164 if (err) 1165 return err; 1166 1167 mutex_lock(&data->update_lock); 1168 min = TEMP_FROM_REG(data->zone[nr].limit); 1169 data->zone[nr].hyst = HYST_TO_REG(min - val); 1170 if (nr == 0 || nr == 1) { 1171 lm85_write_value(client, LM85_REG_AFAN_HYST1, 1172 (data->zone[0].hyst << 4) 1173 | data->zone[1].hyst); 1174 } else { 1175 lm85_write_value(client, LM85_REG_AFAN_HYST2, 1176 (data->zone[2].hyst << 4)); 1177 } 1178 mutex_unlock(&data->update_lock); 1179 return count; 1180 } 1181 1182 static ssize_t temp_auto_temp_min_show(struct device *dev, 1183 struct device_attribute *attr, 1184 char *buf) 1185 { 1186 int nr = to_sensor_dev_attr(attr)->index; 1187 struct lm85_data *data = lm85_update_device(dev); 1188 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit)); 1189 } 1190 1191 static ssize_t temp_auto_temp_min_store(struct device *dev, 1192 struct device_attribute *attr, 1193 const char *buf, size_t count) 1194 { 1195 int nr = to_sensor_dev_attr(attr)->index; 1196 struct lm85_data *data = dev_get_drvdata(dev); 1197 struct i2c_client *client = data->client; 1198 long val; 1199 int err; 1200 1201 err = kstrtol(buf, 10, &val); 1202 if (err) 1203 return err; 1204 1205 mutex_lock(&data->update_lock); 1206 data->zone[nr].limit = TEMP_TO_REG(val); 1207 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr), 1208 data->zone[nr].limit); 1209 1210 /* Update temp_auto_max and temp_auto_range */ 1211 data->zone[nr].range = RANGE_TO_REG( 1212 TEMP_FROM_REG(data->zone[nr].max_desired) - 1213 TEMP_FROM_REG(data->zone[nr].limit)); 1214 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 1215 ((data->zone[nr].range & 0x0f) << 4) 1216 | data->pwm_freq[nr]); 1217 1218 mutex_unlock(&data->update_lock); 1219 return count; 1220 } 1221 1222 static ssize_t temp_auto_temp_max_show(struct device *dev, 1223 struct device_attribute *attr, 1224 char *buf) 1225 { 1226 int nr = to_sensor_dev_attr(attr)->index; 1227 struct lm85_data *data = lm85_update_device(dev); 1228 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) + 1229 RANGE_FROM_REG(data->zone[nr].range)); 1230 } 1231 1232 static ssize_t temp_auto_temp_max_store(struct device *dev, 1233 struct device_attribute *attr, 1234 const char *buf, size_t count) 1235 { 1236 int nr = to_sensor_dev_attr(attr)->index; 1237 struct lm85_data *data = dev_get_drvdata(dev); 1238 struct i2c_client *client = data->client; 1239 int min; 1240 long val; 1241 int err; 1242 1243 err = kstrtol(buf, 10, &val); 1244 if (err) 1245 return err; 1246 1247 mutex_lock(&data->update_lock); 1248 min = TEMP_FROM_REG(data->zone[nr].limit); 1249 data->zone[nr].max_desired = TEMP_TO_REG(val); 1250 data->zone[nr].range = RANGE_TO_REG( 1251 val - min); 1252 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr), 1253 ((data->zone[nr].range & 0x0f) << 4) 1254 | data->pwm_freq[nr]); 1255 mutex_unlock(&data->update_lock); 1256 return count; 1257 } 1258 1259 static ssize_t temp_auto_temp_crit_show(struct device *dev, 1260 struct device_attribute *attr, 1261 char *buf) 1262 { 1263 int nr = to_sensor_dev_attr(attr)->index; 1264 struct lm85_data *data = lm85_update_device(dev); 1265 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical)); 1266 } 1267 1268 static ssize_t temp_auto_temp_crit_store(struct device *dev, 1269 struct device_attribute *attr, 1270 const char *buf, size_t count) 1271 { 1272 int nr = to_sensor_dev_attr(attr)->index; 1273 struct lm85_data *data = dev_get_drvdata(dev); 1274 struct i2c_client *client = data->client; 1275 long val; 1276 int err; 1277 1278 err = kstrtol(buf, 10, &val); 1279 if (err) 1280 return err; 1281 1282 mutex_lock(&data->update_lock); 1283 data->zone[nr].critical = TEMP_TO_REG(val); 1284 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr), 1285 data->zone[nr].critical); 1286 mutex_unlock(&data->update_lock); 1287 return count; 1288 } 1289 1290 static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_off, temp_auto_temp_off, 0); 1291 static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_min, temp_auto_temp_min, 0); 1292 static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_max, temp_auto_temp_max, 0); 1293 static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_crit, temp_auto_temp_crit, 0); 1294 static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_off, temp_auto_temp_off, 1); 1295 static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_min, temp_auto_temp_min, 1); 1296 static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_max, temp_auto_temp_max, 1); 1297 static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_crit, temp_auto_temp_crit, 1); 1298 static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_off, temp_auto_temp_off, 2); 1299 static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_min, temp_auto_temp_min, 2); 1300 static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_max, temp_auto_temp_max, 2); 1301 static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_crit, temp_auto_temp_crit, 2); 1302 1303 static struct attribute *lm85_attributes[] = { 1304 &sensor_dev_attr_fan1_input.dev_attr.attr, 1305 &sensor_dev_attr_fan2_input.dev_attr.attr, 1306 &sensor_dev_attr_fan3_input.dev_attr.attr, 1307 &sensor_dev_attr_fan4_input.dev_attr.attr, 1308 &sensor_dev_attr_fan1_min.dev_attr.attr, 1309 &sensor_dev_attr_fan2_min.dev_attr.attr, 1310 &sensor_dev_attr_fan3_min.dev_attr.attr, 1311 &sensor_dev_attr_fan4_min.dev_attr.attr, 1312 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1313 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1314 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1315 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1316 1317 &sensor_dev_attr_pwm1.dev_attr.attr, 1318 &sensor_dev_attr_pwm2.dev_attr.attr, 1319 &sensor_dev_attr_pwm3.dev_attr.attr, 1320 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1321 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1322 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1323 &sensor_dev_attr_pwm1_freq.dev_attr.attr, 1324 &sensor_dev_attr_pwm2_freq.dev_attr.attr, 1325 &sensor_dev_attr_pwm3_freq.dev_attr.attr, 1326 1327 &sensor_dev_attr_in0_input.dev_attr.attr, 1328 &sensor_dev_attr_in1_input.dev_attr.attr, 1329 &sensor_dev_attr_in2_input.dev_attr.attr, 1330 &sensor_dev_attr_in3_input.dev_attr.attr, 1331 &sensor_dev_attr_in0_min.dev_attr.attr, 1332 &sensor_dev_attr_in1_min.dev_attr.attr, 1333 &sensor_dev_attr_in2_min.dev_attr.attr, 1334 &sensor_dev_attr_in3_min.dev_attr.attr, 1335 &sensor_dev_attr_in0_max.dev_attr.attr, 1336 &sensor_dev_attr_in1_max.dev_attr.attr, 1337 &sensor_dev_attr_in2_max.dev_attr.attr, 1338 &sensor_dev_attr_in3_max.dev_attr.attr, 1339 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1340 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1341 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1342 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1343 1344 &sensor_dev_attr_temp1_input.dev_attr.attr, 1345 &sensor_dev_attr_temp2_input.dev_attr.attr, 1346 &sensor_dev_attr_temp3_input.dev_attr.attr, 1347 &sensor_dev_attr_temp1_min.dev_attr.attr, 1348 &sensor_dev_attr_temp2_min.dev_attr.attr, 1349 &sensor_dev_attr_temp3_min.dev_attr.attr, 1350 &sensor_dev_attr_temp1_max.dev_attr.attr, 1351 &sensor_dev_attr_temp2_max.dev_attr.attr, 1352 &sensor_dev_attr_temp3_max.dev_attr.attr, 1353 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1354 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1355 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1356 &sensor_dev_attr_temp1_fault.dev_attr.attr, 1357 &sensor_dev_attr_temp3_fault.dev_attr.attr, 1358 1359 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr, 1360 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr, 1361 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr, 1362 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr, 1363 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr, 1364 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr, 1365 1366 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr, 1367 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr, 1368 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr, 1369 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr, 1370 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr, 1371 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr, 1372 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr, 1373 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr, 1374 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr, 1375 1376 &dev_attr_vrm.attr, 1377 &dev_attr_cpu0_vid.attr, 1378 &dev_attr_alarms.attr, 1379 NULL 1380 }; 1381 1382 static const struct attribute_group lm85_group = { 1383 .attrs = lm85_attributes, 1384 }; 1385 1386 static struct attribute *lm85_attributes_minctl[] = { 1387 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr, 1388 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr, 1389 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr, 1390 NULL 1391 }; 1392 1393 static const struct attribute_group lm85_group_minctl = { 1394 .attrs = lm85_attributes_minctl, 1395 }; 1396 1397 static struct attribute *lm85_attributes_temp_off[] = { 1398 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr, 1399 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr, 1400 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr, 1401 NULL 1402 }; 1403 1404 static const struct attribute_group lm85_group_temp_off = { 1405 .attrs = lm85_attributes_temp_off, 1406 }; 1407 1408 static struct attribute *lm85_attributes_in4[] = { 1409 &sensor_dev_attr_in4_input.dev_attr.attr, 1410 &sensor_dev_attr_in4_min.dev_attr.attr, 1411 &sensor_dev_attr_in4_max.dev_attr.attr, 1412 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1413 NULL 1414 }; 1415 1416 static const struct attribute_group lm85_group_in4 = { 1417 .attrs = lm85_attributes_in4, 1418 }; 1419 1420 static struct attribute *lm85_attributes_in567[] = { 1421 &sensor_dev_attr_in5_input.dev_attr.attr, 1422 &sensor_dev_attr_in6_input.dev_attr.attr, 1423 &sensor_dev_attr_in7_input.dev_attr.attr, 1424 &sensor_dev_attr_in5_min.dev_attr.attr, 1425 &sensor_dev_attr_in6_min.dev_attr.attr, 1426 &sensor_dev_attr_in7_min.dev_attr.attr, 1427 &sensor_dev_attr_in5_max.dev_attr.attr, 1428 &sensor_dev_attr_in6_max.dev_attr.attr, 1429 &sensor_dev_attr_in7_max.dev_attr.attr, 1430 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1431 &sensor_dev_attr_in6_alarm.dev_attr.attr, 1432 &sensor_dev_attr_in7_alarm.dev_attr.attr, 1433 NULL 1434 }; 1435 1436 static const struct attribute_group lm85_group_in567 = { 1437 .attrs = lm85_attributes_in567, 1438 }; 1439 1440 static void lm85_init_client(struct i2c_client *client) 1441 { 1442 int value; 1443 1444 /* Start monitoring if needed */ 1445 value = lm85_read_value(client, LM85_REG_CONFIG); 1446 if (!(value & 0x01)) { 1447 dev_info(&client->dev, "Starting monitoring\n"); 1448 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01); 1449 } 1450 1451 /* Warn about unusual configuration bits */ 1452 if (value & 0x02) 1453 dev_warn(&client->dev, "Device configuration is locked\n"); 1454 if (!(value & 0x04)) 1455 dev_warn(&client->dev, "Device is not ready\n"); 1456 } 1457 1458 static int lm85_is_fake(struct i2c_client *client) 1459 { 1460 /* 1461 * Differenciate between real LM96000 and Winbond WPCD377I. The latter 1462 * emulate the former except that it has no hardware monitoring function 1463 * so the readings are always 0. 1464 */ 1465 int i; 1466 u8 in_temp, fan; 1467 1468 for (i = 0; i < 8; i++) { 1469 in_temp = i2c_smbus_read_byte_data(client, 0x20 + i); 1470 fan = i2c_smbus_read_byte_data(client, 0x28 + i); 1471 if (in_temp != 0x00 || fan != 0xff) 1472 return 0; 1473 } 1474 1475 return 1; 1476 } 1477 1478 /* Return 0 if detection is successful, -ENODEV otherwise */ 1479 static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info) 1480 { 1481 struct i2c_adapter *adapter = client->adapter; 1482 int address = client->addr; 1483 const char *type_name = NULL; 1484 int company, verstep; 1485 1486 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { 1487 /* We need to be able to do byte I/O */ 1488 return -ENODEV; 1489 } 1490 1491 /* Determine the chip type */ 1492 company = lm85_read_value(client, LM85_REG_COMPANY); 1493 verstep = lm85_read_value(client, LM85_REG_VERSTEP); 1494 1495 dev_dbg(&adapter->dev, 1496 "Detecting device at 0x%02x with COMPANY: 0x%02x and VERSTEP: 0x%02x\n", 1497 address, company, verstep); 1498 1499 if (company == LM85_COMPANY_NATIONAL) { 1500 switch (verstep) { 1501 case LM85_VERSTEP_LM85C: 1502 type_name = "lm85c"; 1503 break; 1504 case LM85_VERSTEP_LM85B: 1505 type_name = "lm85b"; 1506 break; 1507 case LM85_VERSTEP_LM96000_1: 1508 case LM85_VERSTEP_LM96000_2: 1509 /* Check for Winbond WPCD377I */ 1510 if (lm85_is_fake(client)) { 1511 dev_dbg(&adapter->dev, 1512 "Found Winbond WPCD377I, ignoring\n"); 1513 return -ENODEV; 1514 } 1515 type_name = "lm96000"; 1516 break; 1517 } 1518 } else if (company == LM85_COMPANY_ANALOG_DEV) { 1519 switch (verstep) { 1520 case LM85_VERSTEP_ADM1027: 1521 type_name = "adm1027"; 1522 break; 1523 case LM85_VERSTEP_ADT7463: 1524 case LM85_VERSTEP_ADT7463C: 1525 type_name = "adt7463"; 1526 break; 1527 case LM85_VERSTEP_ADT7468_1: 1528 case LM85_VERSTEP_ADT7468_2: 1529 type_name = "adt7468"; 1530 break; 1531 } 1532 } else if (company == LM85_COMPANY_SMSC) { 1533 switch (verstep) { 1534 case LM85_VERSTEP_EMC6D100_A0: 1535 case LM85_VERSTEP_EMC6D100_A1: 1536 /* Note: we can't tell a '100 from a '101 */ 1537 type_name = "emc6d100"; 1538 break; 1539 case LM85_VERSTEP_EMC6D102: 1540 type_name = "emc6d102"; 1541 break; 1542 case LM85_VERSTEP_EMC6D103_A0: 1543 case LM85_VERSTEP_EMC6D103_A1: 1544 type_name = "emc6d103"; 1545 break; 1546 case LM85_VERSTEP_EMC6D103S: 1547 type_name = "emc6d103s"; 1548 break; 1549 } 1550 } 1551 1552 if (!type_name) 1553 return -ENODEV; 1554 1555 strlcpy(info->type, type_name, I2C_NAME_SIZE); 1556 1557 return 0; 1558 } 1559 1560 static int lm85_probe(struct i2c_client *client, const struct i2c_device_id *id) 1561 { 1562 struct device *dev = &client->dev; 1563 struct device *hwmon_dev; 1564 struct lm85_data *data; 1565 int idx = 0; 1566 1567 data = devm_kzalloc(dev, sizeof(struct lm85_data), GFP_KERNEL); 1568 if (!data) 1569 return -ENOMEM; 1570 1571 data->client = client; 1572 if (client->dev.of_node) 1573 data->type = (enum chips)of_device_get_match_data(&client->dev); 1574 else 1575 data->type = id->driver_data; 1576 mutex_init(&data->update_lock); 1577 1578 /* Fill in the chip specific driver values */ 1579 switch (data->type) { 1580 case adm1027: 1581 case adt7463: 1582 case adt7468: 1583 case emc6d100: 1584 case emc6d102: 1585 case emc6d103: 1586 case emc6d103s: 1587 data->freq_map = adm1027_freq_map; 1588 data->freq_map_size = ARRAY_SIZE(adm1027_freq_map); 1589 break; 1590 case lm96000: 1591 data->freq_map = lm96000_freq_map; 1592 data->freq_map_size = ARRAY_SIZE(lm96000_freq_map); 1593 break; 1594 default: 1595 data->freq_map = lm85_freq_map; 1596 data->freq_map_size = ARRAY_SIZE(lm85_freq_map); 1597 } 1598 1599 /* Set the VRM version */ 1600 data->vrm = vid_which_vrm(); 1601 1602 /* Initialize the LM85 chip */ 1603 lm85_init_client(client); 1604 1605 /* sysfs hooks */ 1606 data->groups[idx++] = &lm85_group; 1607 1608 /* minctl and temp_off exist on all chips except emc6d103s */ 1609 if (data->type != emc6d103s) { 1610 data->groups[idx++] = &lm85_group_minctl; 1611 data->groups[idx++] = &lm85_group_temp_off; 1612 } 1613 1614 /* 1615 * The ADT7463/68 have an optional VRM 10 mode where pin 21 is used 1616 * as a sixth digital VID input rather than an analog input. 1617 */ 1618 if (data->type == adt7463 || data->type == adt7468) { 1619 u8 vid = lm85_read_value(client, LM85_REG_VID); 1620 if (vid & 0x80) 1621 data->has_vid5 = true; 1622 } 1623 1624 if (!data->has_vid5) 1625 data->groups[idx++] = &lm85_group_in4; 1626 1627 /* The EMC6D100 has 3 additional voltage inputs */ 1628 if (data->type == emc6d100) 1629 data->groups[idx++] = &lm85_group_in567; 1630 1631 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1632 data, data->groups); 1633 return PTR_ERR_OR_ZERO(hwmon_dev); 1634 } 1635 1636 static const struct i2c_device_id lm85_id[] = { 1637 { "adm1027", adm1027 }, 1638 { "adt7463", adt7463 }, 1639 { "adt7468", adt7468 }, 1640 { "lm85", lm85 }, 1641 { "lm85b", lm85 }, 1642 { "lm85c", lm85 }, 1643 { "lm96000", lm96000 }, 1644 { "emc6d100", emc6d100 }, 1645 { "emc6d101", emc6d100 }, 1646 { "emc6d102", emc6d102 }, 1647 { "emc6d103", emc6d103 }, 1648 { "emc6d103s", emc6d103s }, 1649 { } 1650 }; 1651 MODULE_DEVICE_TABLE(i2c, lm85_id); 1652 1653 static const struct of_device_id __maybe_unused lm85_of_match[] = { 1654 { 1655 .compatible = "adi,adm1027", 1656 .data = (void *)adm1027 1657 }, 1658 { 1659 .compatible = "adi,adt7463", 1660 .data = (void *)adt7463 1661 }, 1662 { 1663 .compatible = "adi,adt7468", 1664 .data = (void *)adt7468 1665 }, 1666 { 1667 .compatible = "national,lm85", 1668 .data = (void *)lm85 1669 }, 1670 { 1671 .compatible = "national,lm85b", 1672 .data = (void *)lm85 1673 }, 1674 { 1675 .compatible = "national,lm85c", 1676 .data = (void *)lm85 1677 }, 1678 { 1679 .compatible = "ti,lm96000", 1680 .data = (void *)lm96000 1681 }, 1682 { 1683 .compatible = "smsc,emc6d100", 1684 .data = (void *)emc6d100 1685 }, 1686 { 1687 .compatible = "smsc,emc6d101", 1688 .data = (void *)emc6d100 1689 }, 1690 { 1691 .compatible = "smsc,emc6d102", 1692 .data = (void *)emc6d102 1693 }, 1694 { 1695 .compatible = "smsc,emc6d103", 1696 .data = (void *)emc6d103 1697 }, 1698 { 1699 .compatible = "smsc,emc6d103s", 1700 .data = (void *)emc6d103s 1701 }, 1702 { }, 1703 }; 1704 MODULE_DEVICE_TABLE(of, lm85_of_match); 1705 1706 static struct i2c_driver lm85_driver = { 1707 .class = I2C_CLASS_HWMON, 1708 .driver = { 1709 .name = "lm85", 1710 .of_match_table = of_match_ptr(lm85_of_match), 1711 }, 1712 .probe = lm85_probe, 1713 .id_table = lm85_id, 1714 .detect = lm85_detect, 1715 .address_list = normal_i2c, 1716 }; 1717 1718 module_i2c_driver(lm85_driver); 1719 1720 MODULE_LICENSE("GPL"); 1721 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, " 1722 "Margit Schubert-While <margitsw@t-online.de>, " 1723 "Justin Thiessen <jthiessen@penguincomputing.com>"); 1724 MODULE_DESCRIPTION("LM85-B, LM85-C driver"); 1725