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