1 /* 2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor 3 * with integrated fan control 4 * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de> 5 * Based on the lm90 driver. 6 * 7 * The LM63 is a sensor chip made by National Semiconductor. It measures 8 * two temperatures (its own and one external one) and the speed of one 9 * fan, those speed it can additionally control. Complete datasheet can be 10 * obtained from National's website at: 11 * http://www.national.com/pf/LM/LM63.html 12 * 13 * The LM63 is basically an LM86 with fan speed monitoring and control 14 * capabilities added. It misses some of the LM86 features though: 15 * - No low limit for local temperature. 16 * - No critical limit for local temperature. 17 * - Critical limit for remote temperature can be changed only once. We 18 * will consider that the critical limit is read-only. 19 * 20 * The datasheet isn't very clear about what the tachometer reading is. 21 * I had a explanation from National Semiconductor though. The two lower 22 * bits of the read value have to be masked out. The value is still 16 bit 23 * in width. 24 * 25 * This program is free software; you can redistribute it and/or modify 26 * it under the terms of the GNU General Public License as published by 27 * the Free Software Foundation; either version 2 of the License, or 28 * (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, 31 * but WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 33 * GNU General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, write to the Free Software 37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 38 */ 39 40 #include <linux/module.h> 41 #include <linux/init.h> 42 #include <linux/slab.h> 43 #include <linux/jiffies.h> 44 #include <linux/i2c.h> 45 #include <linux/hwmon-sysfs.h> 46 #include <linux/hwmon.h> 47 #include <linux/err.h> 48 #include <linux/mutex.h> 49 #include <linux/sysfs.h> 50 #include <linux/types.h> 51 52 /* 53 * Addresses to scan 54 * Address is fully defined internally and cannot be changed except for 55 * LM64 which has one pin dedicated to address selection. 56 * LM63 and LM96163 have address 0x4c. 57 * LM64 can have address 0x18 or 0x4e. 58 */ 59 60 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END }; 61 62 /* 63 * The LM63 registers 64 */ 65 66 #define LM63_REG_CONFIG1 0x03 67 #define LM63_REG_CONVRATE 0x04 68 #define LM63_REG_CONFIG2 0xBF 69 #define LM63_REG_CONFIG_FAN 0x4A 70 71 #define LM63_REG_TACH_COUNT_MSB 0x47 72 #define LM63_REG_TACH_COUNT_LSB 0x46 73 #define LM63_REG_TACH_LIMIT_MSB 0x49 74 #define LM63_REG_TACH_LIMIT_LSB 0x48 75 76 #define LM63_REG_PWM_VALUE 0x4C 77 #define LM63_REG_PWM_FREQ 0x4D 78 #define LM63_REG_LUT_TEMP_HYST 0x4F 79 #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr)) 80 #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr)) 81 82 #define LM63_REG_LOCAL_TEMP 0x00 83 #define LM63_REG_LOCAL_HIGH 0x05 84 85 #define LM63_REG_REMOTE_TEMP_MSB 0x01 86 #define LM63_REG_REMOTE_TEMP_LSB 0x10 87 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 88 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 89 #define LM63_REG_REMOTE_HIGH_MSB 0x07 90 #define LM63_REG_REMOTE_HIGH_LSB 0x13 91 #define LM63_REG_REMOTE_LOW_MSB 0x08 92 #define LM63_REG_REMOTE_LOW_LSB 0x14 93 #define LM63_REG_REMOTE_TCRIT 0x19 94 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 95 96 #define LM63_REG_ALERT_STATUS 0x02 97 #define LM63_REG_ALERT_MASK 0x16 98 99 #define LM63_REG_MAN_ID 0xFE 100 #define LM63_REG_CHIP_ID 0xFF 101 102 #define LM96163_REG_TRUTHERM 0x30 103 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31 104 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32 105 #define LM96163_REG_CONFIG_ENHANCED 0x45 106 107 #define LM63_MAX_CONVRATE 9 108 109 #define LM63_MAX_CONVRATE_HZ 32 110 #define LM96163_MAX_CONVRATE_HZ 26 111 112 /* 113 * Conversions and various macros 114 * For tachometer counts, the LM63 uses 16-bit values. 115 * For local temperature and high limit, remote critical limit and hysteresis 116 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 117 * For remote temperature, low and high limits, it uses signed 11-bit values 118 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 119 * For LM64 the actual remote diode temperature is 16 degree Celsius higher 120 * than the register reading. Remote temperature setpoints have to be 121 * adapted accordingly. 122 */ 123 124 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 125 5400000 / (reg)) 126 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 127 (5400000 / (val)) & 0xFFFC) 128 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 129 #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ 130 (val) >= 127000 ? 127 : \ 131 (val) < 0 ? ((val) - 500) / 1000 : \ 132 ((val) + 500) / 1000) 133 #define TEMP8U_TO_REG(val) ((val) <= 0 ? 0 : \ 134 (val) >= 255000 ? 255 : \ 135 ((val) + 500) / 1000) 136 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 137 #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ 138 (val) >= 127875 ? 0x7FE0 : \ 139 (val) < 0 ? ((val) - 62) / 125 * 32 : \ 140 ((val) + 62) / 125 * 32) 141 #define TEMP11U_TO_REG(val) ((val) <= 0 ? 0 : \ 142 (val) >= 255875 ? 0xFFE0 : \ 143 ((val) + 62) / 125 * 32) 144 #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ 145 (val) >= 127000 ? 127 : \ 146 ((val) + 500) / 1000) 147 148 #define UPDATE_INTERVAL(max, rate) \ 149 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) 150 151 enum chips { lm63, lm64, lm96163 }; 152 153 /* 154 * Client data (each client gets its own) 155 */ 156 157 struct lm63_data { 158 struct i2c_client *client; 159 struct mutex update_lock; 160 const struct attribute_group *groups[5]; 161 char valid; /* zero until following fields are valid */ 162 char lut_valid; /* zero until lut fields are valid */ 163 unsigned long last_updated; /* in jiffies */ 164 unsigned long lut_last_updated; /* in jiffies */ 165 enum chips kind; 166 int temp2_offset; 167 168 int update_interval; /* in milliseconds */ 169 int max_convrate_hz; 170 int lut_size; /* 8 or 12 */ 171 172 /* registers values */ 173 u8 config, config_fan; 174 u16 fan[2]; /* 0: input 175 1: low limit */ 176 u8 pwm1_freq; 177 u8 pwm1[13]; /* 0: current output 178 1-12: lookup table */ 179 s8 temp8[15]; /* 0: local input 180 1: local high limit 181 2: remote critical limit 182 3-14: lookup table */ 183 s16 temp11[4]; /* 0: remote input 184 1: remote low limit 185 2: remote high limit 186 3: remote offset */ 187 u16 temp11u; /* remote input (unsigned) */ 188 u8 temp2_crit_hyst; 189 u8 lut_temp_hyst; 190 u8 alarms; 191 bool pwm_highres; 192 bool lut_temp_highres; 193 bool remote_unsigned; /* true if unsigned remote upper limits */ 194 bool trutherm; 195 }; 196 197 static inline int temp8_from_reg(struct lm63_data *data, int nr) 198 { 199 if (data->remote_unsigned) 200 return TEMP8_FROM_REG((u8)data->temp8[nr]); 201 return TEMP8_FROM_REG(data->temp8[nr]); 202 } 203 204 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 205 { 206 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 207 } 208 209 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 210 { 211 val -= data->temp2_offset; 212 if (data->lut_temp_highres) 213 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); 214 else 215 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); 216 } 217 218 /* 219 * Update the lookup table register cache. 220 * client->update_lock must be held when calling this function. 221 */ 222 static void lm63_update_lut(struct lm63_data *data) 223 { 224 struct i2c_client *client = data->client; 225 int i; 226 227 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 228 !data->lut_valid) { 229 for (i = 0; i < data->lut_size; i++) { 230 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 231 LM63_REG_LUT_PWM(i)); 232 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 233 LM63_REG_LUT_TEMP(i)); 234 } 235 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 236 LM63_REG_LUT_TEMP_HYST); 237 238 data->lut_last_updated = jiffies; 239 data->lut_valid = 1; 240 } 241 } 242 243 static struct lm63_data *lm63_update_device(struct device *dev) 244 { 245 struct lm63_data *data = dev_get_drvdata(dev); 246 struct i2c_client *client = data->client; 247 unsigned long next_update; 248 249 mutex_lock(&data->update_lock); 250 251 next_update = data->last_updated + 252 msecs_to_jiffies(data->update_interval); 253 if (time_after(jiffies, next_update) || !data->valid) { 254 if (data->config & 0x04) { /* tachometer enabled */ 255 /* order matters for fan1_input */ 256 data->fan[0] = i2c_smbus_read_byte_data(client, 257 LM63_REG_TACH_COUNT_LSB) & 0xFC; 258 data->fan[0] |= i2c_smbus_read_byte_data(client, 259 LM63_REG_TACH_COUNT_MSB) << 8; 260 data->fan[1] = (i2c_smbus_read_byte_data(client, 261 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 262 | (i2c_smbus_read_byte_data(client, 263 LM63_REG_TACH_LIMIT_MSB) << 8); 264 } 265 266 data->pwm1_freq = i2c_smbus_read_byte_data(client, 267 LM63_REG_PWM_FREQ); 268 if (data->pwm1_freq == 0) 269 data->pwm1_freq = 1; 270 data->pwm1[0] = i2c_smbus_read_byte_data(client, 271 LM63_REG_PWM_VALUE); 272 273 data->temp8[0] = i2c_smbus_read_byte_data(client, 274 LM63_REG_LOCAL_TEMP); 275 data->temp8[1] = i2c_smbus_read_byte_data(client, 276 LM63_REG_LOCAL_HIGH); 277 278 /* order matters for temp2_input */ 279 data->temp11[0] = i2c_smbus_read_byte_data(client, 280 LM63_REG_REMOTE_TEMP_MSB) << 8; 281 data->temp11[0] |= i2c_smbus_read_byte_data(client, 282 LM63_REG_REMOTE_TEMP_LSB); 283 data->temp11[1] = (i2c_smbus_read_byte_data(client, 284 LM63_REG_REMOTE_LOW_MSB) << 8) 285 | i2c_smbus_read_byte_data(client, 286 LM63_REG_REMOTE_LOW_LSB); 287 data->temp11[2] = (i2c_smbus_read_byte_data(client, 288 LM63_REG_REMOTE_HIGH_MSB) << 8) 289 | i2c_smbus_read_byte_data(client, 290 LM63_REG_REMOTE_HIGH_LSB); 291 data->temp11[3] = (i2c_smbus_read_byte_data(client, 292 LM63_REG_REMOTE_OFFSET_MSB) << 8) 293 | i2c_smbus_read_byte_data(client, 294 LM63_REG_REMOTE_OFFSET_LSB); 295 296 if (data->kind == lm96163) 297 data->temp11u = (i2c_smbus_read_byte_data(client, 298 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 299 | i2c_smbus_read_byte_data(client, 300 LM96163_REG_REMOTE_TEMP_U_LSB); 301 302 data->temp8[2] = i2c_smbus_read_byte_data(client, 303 LM63_REG_REMOTE_TCRIT); 304 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 305 LM63_REG_REMOTE_TCRIT_HYST); 306 307 data->alarms = i2c_smbus_read_byte_data(client, 308 LM63_REG_ALERT_STATUS) & 0x7F; 309 310 data->last_updated = jiffies; 311 data->valid = 1; 312 } 313 314 lm63_update_lut(data); 315 316 mutex_unlock(&data->update_lock); 317 318 return data; 319 } 320 321 /* 322 * Trip points in the lookup table should be in ascending order for both 323 * temperatures and PWM output values. 324 */ 325 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) 326 { 327 int i; 328 329 mutex_lock(&data->update_lock); 330 lm63_update_lut(data); 331 332 for (i = 1; i < data->lut_size; i++) { 333 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 334 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 335 dev_warn(dev, 336 "Lookup table doesn't look sane (check entries %d and %d)\n", 337 i, i + 1); 338 break; 339 } 340 } 341 mutex_unlock(&data->update_lock); 342 343 return i == data->lut_size ? 0 : 1; 344 } 345 346 /* 347 * Sysfs callback functions and files 348 */ 349 350 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 351 char *buf) 352 { 353 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 354 struct lm63_data *data = lm63_update_device(dev); 355 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); 356 } 357 358 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 359 const char *buf, size_t count) 360 { 361 struct lm63_data *data = dev_get_drvdata(dev); 362 struct i2c_client *client = data->client; 363 unsigned long val; 364 int err; 365 366 err = kstrtoul(buf, 10, &val); 367 if (err) 368 return err; 369 370 mutex_lock(&data->update_lock); 371 data->fan[1] = FAN_TO_REG(val); 372 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 373 data->fan[1] & 0xFF); 374 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 375 data->fan[1] >> 8); 376 mutex_unlock(&data->update_lock); 377 return count; 378 } 379 380 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 381 char *buf) 382 { 383 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 384 struct lm63_data *data = lm63_update_device(dev); 385 int nr = attr->index; 386 int pwm; 387 388 if (data->pwm_highres) 389 pwm = data->pwm1[nr]; 390 else 391 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 392 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 393 (2 * data->pwm1_freq); 394 395 return sprintf(buf, "%d\n", pwm); 396 } 397 398 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 399 const char *buf, size_t count) 400 { 401 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 402 struct lm63_data *data = dev_get_drvdata(dev); 403 struct i2c_client *client = data->client; 404 int nr = attr->index; 405 unsigned long val; 406 int err; 407 u8 reg; 408 409 if (!(data->config_fan & 0x20)) /* register is read-only */ 410 return -EPERM; 411 412 err = kstrtoul(buf, 10, &val); 413 if (err) 414 return err; 415 416 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 417 val = clamp_val(val, 0, 255); 418 419 mutex_lock(&data->update_lock); 420 data->pwm1[nr] = data->pwm_highres ? val : 421 (val * data->pwm1_freq * 2 + 127) / 255; 422 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 423 mutex_unlock(&data->update_lock); 424 return count; 425 } 426 427 static ssize_t show_pwm1_enable(struct device *dev, 428 struct device_attribute *dummy, char *buf) 429 { 430 struct lm63_data *data = lm63_update_device(dev); 431 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 432 } 433 434 static ssize_t set_pwm1_enable(struct device *dev, 435 struct device_attribute *dummy, 436 const char *buf, size_t count) 437 { 438 struct lm63_data *data = dev_get_drvdata(dev); 439 struct i2c_client *client = data->client; 440 unsigned long val; 441 int err; 442 443 err = kstrtoul(buf, 10, &val); 444 if (err) 445 return err; 446 if (val < 1 || val > 2) 447 return -EINVAL; 448 449 /* 450 * Only let the user switch to automatic mode if the lookup table 451 * looks sane. 452 */ 453 if (val == 2 && lm63_lut_looks_bad(dev, data)) 454 return -EPERM; 455 456 mutex_lock(&data->update_lock); 457 data->config_fan = i2c_smbus_read_byte_data(client, 458 LM63_REG_CONFIG_FAN); 459 if (val == 1) 460 data->config_fan |= 0x20; 461 else 462 data->config_fan &= ~0x20; 463 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 464 data->config_fan); 465 mutex_unlock(&data->update_lock); 466 return count; 467 } 468 469 /* 470 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 471 * For remote sensor registers temp2_offset has to be considered, 472 * for local sensor it must not. 473 * So we need separate 8bit accessors for local and remote sensor. 474 */ 475 static ssize_t show_local_temp8(struct device *dev, 476 struct device_attribute *devattr, 477 char *buf) 478 { 479 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 480 struct lm63_data *data = lm63_update_device(dev); 481 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 482 } 483 484 static ssize_t show_remote_temp8(struct device *dev, 485 struct device_attribute *devattr, 486 char *buf) 487 { 488 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 489 struct lm63_data *data = lm63_update_device(dev); 490 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 491 + data->temp2_offset); 492 } 493 494 static ssize_t show_lut_temp(struct device *dev, 495 struct device_attribute *devattr, 496 char *buf) 497 { 498 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 499 struct lm63_data *data = lm63_update_device(dev); 500 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 501 + data->temp2_offset); 502 } 503 504 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 505 const char *buf, size_t count) 506 { 507 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 508 struct lm63_data *data = dev_get_drvdata(dev); 509 struct i2c_client *client = data->client; 510 int nr = attr->index; 511 long val; 512 int err; 513 int temp; 514 u8 reg; 515 516 err = kstrtol(buf, 10, &val); 517 if (err) 518 return err; 519 520 mutex_lock(&data->update_lock); 521 switch (nr) { 522 case 2: 523 reg = LM63_REG_REMOTE_TCRIT; 524 if (data->remote_unsigned) 525 temp = TEMP8U_TO_REG(val - data->temp2_offset); 526 else 527 temp = TEMP8_TO_REG(val - data->temp2_offset); 528 break; 529 case 1: 530 reg = LM63_REG_LOCAL_HIGH; 531 temp = TEMP8_TO_REG(val); 532 break; 533 default: /* lookup table */ 534 reg = LM63_REG_LUT_TEMP(nr - 3); 535 temp = lut_temp_to_reg(data, val); 536 } 537 data->temp8[nr] = temp; 538 i2c_smbus_write_byte_data(client, reg, temp); 539 mutex_unlock(&data->update_lock); 540 return count; 541 } 542 543 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 544 char *buf) 545 { 546 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 547 struct lm63_data *data = lm63_update_device(dev); 548 int nr = attr->index; 549 int temp; 550 551 if (!nr) { 552 /* 553 * Use unsigned temperature unless its value is zero. 554 * If it is zero, use signed temperature. 555 */ 556 if (data->temp11u) 557 temp = TEMP11_FROM_REG(data->temp11u); 558 else 559 temp = TEMP11_FROM_REG(data->temp11[nr]); 560 } else { 561 if (data->remote_unsigned && nr == 2) 562 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 563 else 564 temp = TEMP11_FROM_REG(data->temp11[nr]); 565 } 566 return sprintf(buf, "%d\n", temp + data->temp2_offset); 567 } 568 569 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 570 const char *buf, size_t count) 571 { 572 static const u8 reg[6] = { 573 LM63_REG_REMOTE_LOW_MSB, 574 LM63_REG_REMOTE_LOW_LSB, 575 LM63_REG_REMOTE_HIGH_MSB, 576 LM63_REG_REMOTE_HIGH_LSB, 577 LM63_REG_REMOTE_OFFSET_MSB, 578 LM63_REG_REMOTE_OFFSET_LSB, 579 }; 580 581 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 582 struct lm63_data *data = dev_get_drvdata(dev); 583 struct i2c_client *client = data->client; 584 long val; 585 int err; 586 int nr = attr->index; 587 588 err = kstrtol(buf, 10, &val); 589 if (err) 590 return err; 591 592 mutex_lock(&data->update_lock); 593 if (data->remote_unsigned && nr == 2) 594 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 595 else 596 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 597 598 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 599 data->temp11[nr] >> 8); 600 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 601 data->temp11[nr] & 0xff); 602 mutex_unlock(&data->update_lock); 603 return count; 604 } 605 606 /* 607 * Hysteresis register holds a relative value, while we want to present 608 * an absolute to user-space 609 */ 610 static ssize_t show_temp2_crit_hyst(struct device *dev, 611 struct device_attribute *dummy, char *buf) 612 { 613 struct lm63_data *data = lm63_update_device(dev); 614 return sprintf(buf, "%d\n", temp8_from_reg(data, 2) 615 + data->temp2_offset 616 - TEMP8_FROM_REG(data->temp2_crit_hyst)); 617 } 618 619 static ssize_t show_lut_temp_hyst(struct device *dev, 620 struct device_attribute *devattr, char *buf) 621 { 622 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 623 struct lm63_data *data = lm63_update_device(dev); 624 625 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 626 + data->temp2_offset 627 - TEMP8_FROM_REG(data->lut_temp_hyst)); 628 } 629 630 /* 631 * And now the other way around, user-space provides an absolute 632 * hysteresis value and we have to store a relative one 633 */ 634 static ssize_t set_temp2_crit_hyst(struct device *dev, 635 struct device_attribute *dummy, 636 const char *buf, size_t count) 637 { 638 struct lm63_data *data = dev_get_drvdata(dev); 639 struct i2c_client *client = data->client; 640 long val; 641 int err; 642 long hyst; 643 644 err = kstrtol(buf, 10, &val); 645 if (err) 646 return err; 647 648 mutex_lock(&data->update_lock); 649 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 650 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 651 HYST_TO_REG(hyst)); 652 mutex_unlock(&data->update_lock); 653 return count; 654 } 655 656 /* 657 * Set conversion rate. 658 * client->update_lock must be held when calling this function. 659 */ 660 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) 661 { 662 struct i2c_client *client = data->client; 663 unsigned int update_interval; 664 int i; 665 666 /* Shift calculations to avoid rounding errors */ 667 interval <<= 6; 668 669 /* find the nearest update rate */ 670 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 671 / data->max_convrate_hz; 672 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 673 if (interval >= update_interval * 3 / 4) 674 break; 675 676 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 677 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 678 } 679 680 static ssize_t show_update_interval(struct device *dev, 681 struct device_attribute *attr, char *buf) 682 { 683 struct lm63_data *data = dev_get_drvdata(dev); 684 685 return sprintf(buf, "%u\n", data->update_interval); 686 } 687 688 static ssize_t set_update_interval(struct device *dev, 689 struct device_attribute *attr, 690 const char *buf, size_t count) 691 { 692 struct lm63_data *data = dev_get_drvdata(dev); 693 unsigned long val; 694 int err; 695 696 err = kstrtoul(buf, 10, &val); 697 if (err) 698 return err; 699 700 mutex_lock(&data->update_lock); 701 lm63_set_convrate(data, clamp_val(val, 0, 100000)); 702 mutex_unlock(&data->update_lock); 703 704 return count; 705 } 706 707 static ssize_t show_type(struct device *dev, struct device_attribute *attr, 708 char *buf) 709 { 710 struct lm63_data *data = dev_get_drvdata(dev); 711 712 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 713 } 714 715 static ssize_t set_type(struct device *dev, struct device_attribute *attr, 716 const char *buf, size_t count) 717 { 718 struct lm63_data *data = dev_get_drvdata(dev); 719 struct i2c_client *client = data->client; 720 unsigned long val; 721 int ret; 722 u8 reg; 723 724 ret = kstrtoul(buf, 10, &val); 725 if (ret < 0) 726 return ret; 727 if (val != 1 && val != 2) 728 return -EINVAL; 729 730 mutex_lock(&data->update_lock); 731 data->trutherm = val == 1; 732 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 733 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 734 reg | (data->trutherm ? 0x02 : 0x00)); 735 data->valid = 0; 736 mutex_unlock(&data->update_lock); 737 738 return count; 739 } 740 741 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, 742 char *buf) 743 { 744 struct lm63_data *data = lm63_update_device(dev); 745 return sprintf(buf, "%u\n", data->alarms); 746 } 747 748 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 749 char *buf) 750 { 751 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 752 struct lm63_data *data = lm63_update_device(dev); 753 int bitnr = attr->index; 754 755 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 756 } 757 758 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 759 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 760 set_fan, 1); 761 762 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 763 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 764 show_pwm1_enable, set_pwm1_enable); 765 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 766 show_pwm1, set_pwm1, 1); 767 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 768 show_lut_temp, set_temp8, 3); 769 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 770 show_lut_temp_hyst, NULL, 3); 771 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 772 show_pwm1, set_pwm1, 2); 773 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 774 show_lut_temp, set_temp8, 4); 775 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 776 show_lut_temp_hyst, NULL, 4); 777 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 778 show_pwm1, set_pwm1, 3); 779 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 780 show_lut_temp, set_temp8, 5); 781 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 782 show_lut_temp_hyst, NULL, 5); 783 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 784 show_pwm1, set_pwm1, 4); 785 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 786 show_lut_temp, set_temp8, 6); 787 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 788 show_lut_temp_hyst, NULL, 6); 789 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 790 show_pwm1, set_pwm1, 5); 791 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 792 show_lut_temp, set_temp8, 7); 793 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 794 show_lut_temp_hyst, NULL, 7); 795 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 796 show_pwm1, set_pwm1, 6); 797 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 798 show_lut_temp, set_temp8, 8); 799 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 800 show_lut_temp_hyst, NULL, 8); 801 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 802 show_pwm1, set_pwm1, 7); 803 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 804 show_lut_temp, set_temp8, 9); 805 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 806 show_lut_temp_hyst, NULL, 9); 807 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 808 show_pwm1, set_pwm1, 8); 809 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 810 show_lut_temp, set_temp8, 10); 811 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 812 show_lut_temp_hyst, NULL, 10); 813 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 814 show_pwm1, set_pwm1, 9); 815 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 816 show_lut_temp, set_temp8, 11); 817 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 818 show_lut_temp_hyst, NULL, 11); 819 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 820 show_pwm1, set_pwm1, 10); 821 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 822 show_lut_temp, set_temp8, 12); 823 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 824 show_lut_temp_hyst, NULL, 12); 825 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 826 show_pwm1, set_pwm1, 11); 827 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 828 show_lut_temp, set_temp8, 13); 829 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 830 show_lut_temp_hyst, NULL, 13); 831 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 832 show_pwm1, set_pwm1, 12); 833 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 834 show_lut_temp, set_temp8, 14); 835 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 836 show_lut_temp_hyst, NULL, 14); 837 838 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 839 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 840 set_temp8, 1); 841 842 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 843 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 844 set_temp11, 1); 845 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 846 set_temp11, 2); 847 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 848 set_temp11, 3); 849 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 850 set_temp8, 2); 851 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, 852 set_temp2_crit_hyst); 853 854 static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type); 855 856 /* Individual alarm files */ 857 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 858 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 859 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 860 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 861 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 862 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 863 /* Raw alarm file for compatibility */ 864 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 865 866 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, 867 set_update_interval); 868 869 static struct attribute *lm63_attributes[] = { 870 &sensor_dev_attr_pwm1.dev_attr.attr, 871 &dev_attr_pwm1_enable.attr, 872 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 873 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 874 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 875 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 876 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 877 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 878 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 879 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 880 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 881 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 882 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 883 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 884 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 885 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 886 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 887 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 888 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 889 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 890 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 891 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 892 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 893 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 894 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 895 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 896 897 &sensor_dev_attr_temp1_input.dev_attr.attr, 898 &sensor_dev_attr_temp2_input.dev_attr.attr, 899 &sensor_dev_attr_temp2_min.dev_attr.attr, 900 &sensor_dev_attr_temp1_max.dev_attr.attr, 901 &sensor_dev_attr_temp2_max.dev_attr.attr, 902 &sensor_dev_attr_temp2_offset.dev_attr.attr, 903 &sensor_dev_attr_temp2_crit.dev_attr.attr, 904 &dev_attr_temp2_crit_hyst.attr, 905 906 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 907 &sensor_dev_attr_temp2_fault.dev_attr.attr, 908 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 909 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 910 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 911 &dev_attr_alarms.attr, 912 &dev_attr_update_interval.attr, 913 NULL 914 }; 915 916 static struct attribute *lm63_attributes_temp2_type[] = { 917 &dev_attr_temp2_type.attr, 918 NULL 919 }; 920 921 static const struct attribute_group lm63_group_temp2_type = { 922 .attrs = lm63_attributes_temp2_type, 923 }; 924 925 static struct attribute *lm63_attributes_extra_lut[] = { 926 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 927 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 928 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 929 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 930 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 931 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 932 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 933 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 934 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 935 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 936 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 937 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 938 NULL 939 }; 940 941 static const struct attribute_group lm63_group_extra_lut = { 942 .attrs = lm63_attributes_extra_lut, 943 }; 944 945 /* 946 * On LM63, temp2_crit can be set only once, which should be job 947 * of the bootloader. 948 * On LM64, temp2_crit can always be set. 949 * On LM96163, temp2_crit can be set if bit 1 of the configuration 950 * register is true. 951 */ 952 static umode_t lm63_attribute_mode(struct kobject *kobj, 953 struct attribute *attr, int index) 954 { 955 struct device *dev = container_of(kobj, struct device, kobj); 956 struct lm63_data *data = dev_get_drvdata(dev); 957 958 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 959 && (data->kind == lm64 || 960 (data->kind == lm96163 && (data->config & 0x02)))) 961 return attr->mode | S_IWUSR; 962 963 return attr->mode; 964 } 965 966 static const struct attribute_group lm63_group = { 967 .is_visible = lm63_attribute_mode, 968 .attrs = lm63_attributes, 969 }; 970 971 static struct attribute *lm63_attributes_fan1[] = { 972 &sensor_dev_attr_fan1_input.dev_attr.attr, 973 &sensor_dev_attr_fan1_min.dev_attr.attr, 974 975 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 976 NULL 977 }; 978 979 static const struct attribute_group lm63_group_fan1 = { 980 .attrs = lm63_attributes_fan1, 981 }; 982 983 /* 984 * Real code 985 */ 986 987 /* Return 0 if detection is successful, -ENODEV otherwise */ 988 static int lm63_detect(struct i2c_client *client, 989 struct i2c_board_info *info) 990 { 991 struct i2c_adapter *adapter = client->adapter; 992 u8 man_id, chip_id, reg_config1, reg_config2; 993 u8 reg_alert_status, reg_alert_mask; 994 int address = client->addr; 995 996 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 997 return -ENODEV; 998 999 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 1000 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 1001 1002 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1003 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 1004 reg_alert_status = i2c_smbus_read_byte_data(client, 1005 LM63_REG_ALERT_STATUS); 1006 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1007 1008 if (man_id != 0x01 /* National Semiconductor */ 1009 || (reg_config1 & 0x18) != 0x00 1010 || (reg_config2 & 0xF8) != 0x00 1011 || (reg_alert_status & 0x20) != 0x00 1012 || (reg_alert_mask & 0xA4) != 0xA4) { 1013 dev_dbg(&adapter->dev, 1014 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1015 man_id, chip_id); 1016 return -ENODEV; 1017 } 1018 1019 if (chip_id == 0x41 && address == 0x4c) 1020 strlcpy(info->type, "lm63", I2C_NAME_SIZE); 1021 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1022 strlcpy(info->type, "lm64", I2C_NAME_SIZE); 1023 else if (chip_id == 0x49 && address == 0x4c) 1024 strlcpy(info->type, "lm96163", I2C_NAME_SIZE); 1025 else 1026 return -ENODEV; 1027 1028 return 0; 1029 } 1030 1031 /* 1032 * Ideally we shouldn't have to initialize anything, since the BIOS 1033 * should have taken care of everything 1034 */ 1035 static void lm63_init_client(struct lm63_data *data) 1036 { 1037 struct i2c_client *client = data->client; 1038 struct device *dev = &client->dev; 1039 u8 convrate; 1040 1041 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1042 data->config_fan = i2c_smbus_read_byte_data(client, 1043 LM63_REG_CONFIG_FAN); 1044 1045 /* Start converting if needed */ 1046 if (data->config & 0x40) { /* standby */ 1047 dev_dbg(dev, "Switching to operational mode\n"); 1048 data->config &= 0xA7; 1049 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1050 data->config); 1051 } 1052 /* Tachometer is always enabled on LM64 */ 1053 if (data->kind == lm64) 1054 data->config |= 0x04; 1055 1056 /* We may need pwm1_freq before ever updating the client data */ 1057 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1058 if (data->pwm1_freq == 0) 1059 data->pwm1_freq = 1; 1060 1061 switch (data->kind) { 1062 case lm63: 1063 case lm64: 1064 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1065 data->lut_size = 8; 1066 break; 1067 case lm96163: 1068 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1069 data->lut_size = 12; 1070 data->trutherm 1071 = i2c_smbus_read_byte_data(client, 1072 LM96163_REG_TRUTHERM) & 0x02; 1073 break; 1074 } 1075 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1076 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1077 convrate = LM63_MAX_CONVRATE; 1078 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1079 convrate); 1080 1081 /* 1082 * For LM96163, check if high resolution PWM 1083 * and unsigned temperature format is enabled. 1084 */ 1085 if (data->kind == lm96163) { 1086 u8 config_enhanced 1087 = i2c_smbus_read_byte_data(client, 1088 LM96163_REG_CONFIG_ENHANCED); 1089 if (config_enhanced & 0x20) 1090 data->lut_temp_highres = true; 1091 if ((config_enhanced & 0x10) 1092 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1093 data->pwm_highres = true; 1094 if (config_enhanced & 0x08) 1095 data->remote_unsigned = true; 1096 } 1097 1098 /* Show some debug info about the LM63 configuration */ 1099 if (data->kind == lm63) 1100 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1101 (data->config & 0x04) ? "tachometer input" : 1102 "alert output"); 1103 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1104 (data->config_fan & 0x08) ? "1.4" : "360", 1105 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1106 dev_dbg(dev, "PWM output active %s, %s mode\n", 1107 (data->config_fan & 0x10) ? "low" : "high", 1108 (data->config_fan & 0x20) ? "manual" : "auto"); 1109 } 1110 1111 static int lm63_probe(struct i2c_client *client, 1112 const struct i2c_device_id *id) 1113 { 1114 struct device *dev = &client->dev; 1115 struct device *hwmon_dev; 1116 struct lm63_data *data; 1117 int groups = 0; 1118 1119 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1120 if (!data) 1121 return -ENOMEM; 1122 1123 data->client = client; 1124 mutex_init(&data->update_lock); 1125 1126 /* Set the device type */ 1127 data->kind = id->driver_data; 1128 if (data->kind == lm64) 1129 data->temp2_offset = 16000; 1130 1131 /* Initialize chip */ 1132 lm63_init_client(data); 1133 1134 /* Register sysfs hooks */ 1135 data->groups[groups++] = &lm63_group; 1136 if (data->config & 0x04) /* tachometer enabled */ 1137 data->groups[groups++] = &lm63_group_fan1; 1138 1139 if (data->kind == lm96163) { 1140 data->groups[groups++] = &lm63_group_temp2_type; 1141 data->groups[groups++] = &lm63_group_extra_lut; 1142 } 1143 1144 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1145 data, data->groups); 1146 return PTR_ERR_OR_ZERO(hwmon_dev); 1147 } 1148 1149 /* 1150 * Driver data (common to all clients) 1151 */ 1152 1153 static const struct i2c_device_id lm63_id[] = { 1154 { "lm63", lm63 }, 1155 { "lm64", lm64 }, 1156 { "lm96163", lm96163 }, 1157 { } 1158 }; 1159 MODULE_DEVICE_TABLE(i2c, lm63_id); 1160 1161 static struct i2c_driver lm63_driver = { 1162 .class = I2C_CLASS_HWMON, 1163 .driver = { 1164 .name = "lm63", 1165 }, 1166 .probe = lm63_probe, 1167 .id_table = lm63_id, 1168 .detect = lm63_detect, 1169 .address_list = normal_i2c, 1170 }; 1171 1172 module_i2c_driver(lm63_driver); 1173 1174 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1175 MODULE_DESCRIPTION("LM63 driver"); 1176 MODULE_LICENSE("GPL"); 1177