1 /* 2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor 3 * with integrated fan control 4 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org> 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 device *hwmon_dev; 159 struct mutex update_lock; 160 char valid; /* zero until following fields are valid */ 161 char lut_valid; /* zero until lut fields are valid */ 162 unsigned long last_updated; /* in jiffies */ 163 unsigned long lut_last_updated; /* in jiffies */ 164 enum chips kind; 165 int temp2_offset; 166 167 int update_interval; /* in milliseconds */ 168 int max_convrate_hz; 169 int lut_size; /* 8 or 12 */ 170 171 /* registers values */ 172 u8 config, config_fan; 173 u16 fan[2]; /* 0: input 174 1: low limit */ 175 u8 pwm1_freq; 176 u8 pwm1[13]; /* 0: current output 177 1-12: lookup table */ 178 s8 temp8[15]; /* 0: local input 179 1: local high limit 180 2: remote critical limit 181 3-14: lookup table */ 182 s16 temp11[4]; /* 0: remote input 183 1: remote low limit 184 2: remote high limit 185 3: remote offset */ 186 u16 temp11u; /* remote input (unsigned) */ 187 u8 temp2_crit_hyst; 188 u8 lut_temp_hyst; 189 u8 alarms; 190 bool pwm_highres; 191 bool lut_temp_highres; 192 bool remote_unsigned; /* true if unsigned remote upper limits */ 193 bool trutherm; 194 }; 195 196 static inline int temp8_from_reg(struct lm63_data *data, int nr) 197 { 198 if (data->remote_unsigned) 199 return TEMP8_FROM_REG((u8)data->temp8[nr]); 200 return TEMP8_FROM_REG(data->temp8[nr]); 201 } 202 203 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 204 { 205 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 206 } 207 208 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 209 { 210 val -= data->temp2_offset; 211 if (data->lut_temp_highres) 212 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); 213 else 214 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); 215 } 216 217 /* 218 * Update the lookup table register cache. 219 * client->update_lock must be held when calling this function. 220 */ 221 static void lm63_update_lut(struct i2c_client *client) 222 { 223 struct lm63_data *data = i2c_get_clientdata(client); 224 int i; 225 226 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 227 !data->lut_valid) { 228 for (i = 0; i < data->lut_size; i++) { 229 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 230 LM63_REG_LUT_PWM(i)); 231 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 232 LM63_REG_LUT_TEMP(i)); 233 } 234 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 235 LM63_REG_LUT_TEMP_HYST); 236 237 data->lut_last_updated = jiffies; 238 data->lut_valid = 1; 239 } 240 } 241 242 static struct lm63_data *lm63_update_device(struct device *dev) 243 { 244 struct i2c_client *client = to_i2c_client(dev); 245 struct lm63_data *data = i2c_get_clientdata(client); 246 unsigned long next_update; 247 248 mutex_lock(&data->update_lock); 249 250 next_update = data->last_updated + 251 msecs_to_jiffies(data->update_interval); 252 if (time_after(jiffies, next_update) || !data->valid) { 253 if (data->config & 0x04) { /* tachometer enabled */ 254 /* order matters for fan1_input */ 255 data->fan[0] = i2c_smbus_read_byte_data(client, 256 LM63_REG_TACH_COUNT_LSB) & 0xFC; 257 data->fan[0] |= i2c_smbus_read_byte_data(client, 258 LM63_REG_TACH_COUNT_MSB) << 8; 259 data->fan[1] = (i2c_smbus_read_byte_data(client, 260 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 261 | (i2c_smbus_read_byte_data(client, 262 LM63_REG_TACH_LIMIT_MSB) << 8); 263 } 264 265 data->pwm1_freq = i2c_smbus_read_byte_data(client, 266 LM63_REG_PWM_FREQ); 267 if (data->pwm1_freq == 0) 268 data->pwm1_freq = 1; 269 data->pwm1[0] = i2c_smbus_read_byte_data(client, 270 LM63_REG_PWM_VALUE); 271 272 data->temp8[0] = i2c_smbus_read_byte_data(client, 273 LM63_REG_LOCAL_TEMP); 274 data->temp8[1] = i2c_smbus_read_byte_data(client, 275 LM63_REG_LOCAL_HIGH); 276 277 /* order matters for temp2_input */ 278 data->temp11[0] = i2c_smbus_read_byte_data(client, 279 LM63_REG_REMOTE_TEMP_MSB) << 8; 280 data->temp11[0] |= i2c_smbus_read_byte_data(client, 281 LM63_REG_REMOTE_TEMP_LSB); 282 data->temp11[1] = (i2c_smbus_read_byte_data(client, 283 LM63_REG_REMOTE_LOW_MSB) << 8) 284 | i2c_smbus_read_byte_data(client, 285 LM63_REG_REMOTE_LOW_LSB); 286 data->temp11[2] = (i2c_smbus_read_byte_data(client, 287 LM63_REG_REMOTE_HIGH_MSB) << 8) 288 | i2c_smbus_read_byte_data(client, 289 LM63_REG_REMOTE_HIGH_LSB); 290 data->temp11[3] = (i2c_smbus_read_byte_data(client, 291 LM63_REG_REMOTE_OFFSET_MSB) << 8) 292 | i2c_smbus_read_byte_data(client, 293 LM63_REG_REMOTE_OFFSET_LSB); 294 295 if (data->kind == lm96163) 296 data->temp11u = (i2c_smbus_read_byte_data(client, 297 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 298 | i2c_smbus_read_byte_data(client, 299 LM96163_REG_REMOTE_TEMP_U_LSB); 300 301 data->temp8[2] = i2c_smbus_read_byte_data(client, 302 LM63_REG_REMOTE_TCRIT); 303 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 304 LM63_REG_REMOTE_TCRIT_HYST); 305 306 data->alarms = i2c_smbus_read_byte_data(client, 307 LM63_REG_ALERT_STATUS) & 0x7F; 308 309 data->last_updated = jiffies; 310 data->valid = 1; 311 } 312 313 lm63_update_lut(client); 314 315 mutex_unlock(&data->update_lock); 316 317 return data; 318 } 319 320 /* 321 * Trip points in the lookup table should be in ascending order for both 322 * temperatures and PWM output values. 323 */ 324 static int lm63_lut_looks_bad(struct i2c_client *client) 325 { 326 struct lm63_data *data = i2c_get_clientdata(client); 327 int i; 328 329 mutex_lock(&data->update_lock); 330 lm63_update_lut(client); 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(&client->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 i2c_client *client = to_i2c_client(dev); 362 struct lm63_data *data = i2c_get_clientdata(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 i2c_client *client = to_i2c_client(dev); 403 struct lm63_data *data = i2c_get_clientdata(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 i2c_client *client = to_i2c_client(dev); 439 struct lm63_data *data = i2c_get_clientdata(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(client)) 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 i2c_client *client = to_i2c_client(dev); 509 struct lm63_data *data = i2c_get_clientdata(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 i2c_client *client = to_i2c_client(dev); 583 struct lm63_data *data = i2c_get_clientdata(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 i2c_client *client = to_i2c_client(dev); 639 struct lm63_data *data = i2c_get_clientdata(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 i2c_client *client, struct lm63_data *data, 661 unsigned int interval) 662 { 663 int i; 664 unsigned int update_interval; 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 i2c_client *client = to_i2c_client(dev); 693 struct lm63_data *data = i2c_get_clientdata(client); 694 unsigned long val; 695 int err; 696 697 err = kstrtoul(buf, 10, &val); 698 if (err) 699 return err; 700 701 mutex_lock(&data->update_lock); 702 lm63_set_convrate(client, data, clamp_val(val, 0, 100000)); 703 mutex_unlock(&data->update_lock); 704 705 return count; 706 } 707 708 static ssize_t show_type(struct device *dev, struct device_attribute *attr, 709 char *buf) 710 { 711 struct i2c_client *client = to_i2c_client(dev); 712 struct lm63_data *data = i2c_get_clientdata(client); 713 714 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 715 } 716 717 static ssize_t set_type(struct device *dev, struct device_attribute *attr, 718 const char *buf, size_t count) 719 { 720 struct i2c_client *client = to_i2c_client(dev); 721 struct lm63_data *data = i2c_get_clientdata(client); 722 unsigned long val; 723 int ret; 724 u8 reg; 725 726 ret = kstrtoul(buf, 10, &val); 727 if (ret < 0) 728 return ret; 729 if (val != 1 && val != 2) 730 return -EINVAL; 731 732 mutex_lock(&data->update_lock); 733 data->trutherm = val == 1; 734 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 735 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 736 reg | (data->trutherm ? 0x02 : 0x00)); 737 data->valid = 0; 738 mutex_unlock(&data->update_lock); 739 740 return count; 741 } 742 743 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, 744 char *buf) 745 { 746 struct lm63_data *data = lm63_update_device(dev); 747 return sprintf(buf, "%u\n", data->alarms); 748 } 749 750 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 751 char *buf) 752 { 753 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 754 struct lm63_data *data = lm63_update_device(dev); 755 int bitnr = attr->index; 756 757 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 758 } 759 760 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 761 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 762 set_fan, 1); 763 764 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 765 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 766 show_pwm1_enable, set_pwm1_enable); 767 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 768 show_pwm1, set_pwm1, 1); 769 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 770 show_lut_temp, set_temp8, 3); 771 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 772 show_lut_temp_hyst, NULL, 3); 773 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 774 show_pwm1, set_pwm1, 2); 775 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 776 show_lut_temp, set_temp8, 4); 777 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 778 show_lut_temp_hyst, NULL, 4); 779 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 780 show_pwm1, set_pwm1, 3); 781 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 782 show_lut_temp, set_temp8, 5); 783 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 784 show_lut_temp_hyst, NULL, 5); 785 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 786 show_pwm1, set_pwm1, 4); 787 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 788 show_lut_temp, set_temp8, 6); 789 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 790 show_lut_temp_hyst, NULL, 6); 791 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 792 show_pwm1, set_pwm1, 5); 793 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 794 show_lut_temp, set_temp8, 7); 795 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 796 show_lut_temp_hyst, NULL, 7); 797 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 798 show_pwm1, set_pwm1, 6); 799 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 800 show_lut_temp, set_temp8, 8); 801 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 802 show_lut_temp_hyst, NULL, 8); 803 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 804 show_pwm1, set_pwm1, 7); 805 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 806 show_lut_temp, set_temp8, 9); 807 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 808 show_lut_temp_hyst, NULL, 9); 809 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 810 show_pwm1, set_pwm1, 8); 811 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 812 show_lut_temp, set_temp8, 10); 813 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 814 show_lut_temp_hyst, NULL, 10); 815 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 816 show_pwm1, set_pwm1, 9); 817 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 818 show_lut_temp, set_temp8, 11); 819 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 820 show_lut_temp_hyst, NULL, 11); 821 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 822 show_pwm1, set_pwm1, 10); 823 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 824 show_lut_temp, set_temp8, 12); 825 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 826 show_lut_temp_hyst, NULL, 12); 827 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 828 show_pwm1, set_pwm1, 11); 829 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 830 show_lut_temp, set_temp8, 13); 831 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 832 show_lut_temp_hyst, NULL, 13); 833 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 834 show_pwm1, set_pwm1, 12); 835 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 836 show_lut_temp, set_temp8, 14); 837 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 838 show_lut_temp_hyst, NULL, 14); 839 840 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 841 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 842 set_temp8, 1); 843 844 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 845 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 846 set_temp11, 1); 847 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 848 set_temp11, 2); 849 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 850 set_temp11, 3); 851 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 852 set_temp8, 2); 853 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, 854 set_temp2_crit_hyst); 855 856 static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type); 857 858 /* Individual alarm files */ 859 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 860 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 861 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 862 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 863 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 864 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 865 /* Raw alarm file for compatibility */ 866 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 867 868 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval, 869 set_update_interval); 870 871 static struct attribute *lm63_attributes[] = { 872 &sensor_dev_attr_pwm1.dev_attr.attr, 873 &dev_attr_pwm1_enable.attr, 874 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 875 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 876 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 877 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 878 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 879 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 880 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 881 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 882 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 883 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 884 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 885 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 886 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 887 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 888 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 889 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 890 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 891 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 892 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 893 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 894 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 895 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 896 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 897 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 898 899 &sensor_dev_attr_temp1_input.dev_attr.attr, 900 &sensor_dev_attr_temp2_input.dev_attr.attr, 901 &sensor_dev_attr_temp2_min.dev_attr.attr, 902 &sensor_dev_attr_temp1_max.dev_attr.attr, 903 &sensor_dev_attr_temp2_max.dev_attr.attr, 904 &sensor_dev_attr_temp2_offset.dev_attr.attr, 905 &sensor_dev_attr_temp2_crit.dev_attr.attr, 906 &dev_attr_temp2_crit_hyst.attr, 907 908 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 909 &sensor_dev_attr_temp2_fault.dev_attr.attr, 910 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 911 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 912 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 913 &dev_attr_alarms.attr, 914 &dev_attr_update_interval.attr, 915 NULL 916 }; 917 918 static struct attribute *lm63_attributes_extra_lut[] = { 919 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 920 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 921 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 922 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 923 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 924 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 925 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 926 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 927 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 928 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 929 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 930 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 931 NULL 932 }; 933 934 static const struct attribute_group lm63_group_extra_lut = { 935 .attrs = lm63_attributes_extra_lut, 936 }; 937 938 /* 939 * On LM63, temp2_crit can be set only once, which should be job 940 * of the bootloader. 941 * On LM64, temp2_crit can always be set. 942 * On LM96163, temp2_crit can be set if bit 1 of the configuration 943 * register is true. 944 */ 945 static umode_t lm63_attribute_mode(struct kobject *kobj, 946 struct attribute *attr, int index) 947 { 948 struct device *dev = container_of(kobj, struct device, kobj); 949 struct i2c_client *client = to_i2c_client(dev); 950 struct lm63_data *data = i2c_get_clientdata(client); 951 952 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 953 && (data->kind == lm64 || 954 (data->kind == lm96163 && (data->config & 0x02)))) 955 return attr->mode | S_IWUSR; 956 957 return attr->mode; 958 } 959 960 static const struct attribute_group lm63_group = { 961 .is_visible = lm63_attribute_mode, 962 .attrs = lm63_attributes, 963 }; 964 965 static struct attribute *lm63_attributes_fan1[] = { 966 &sensor_dev_attr_fan1_input.dev_attr.attr, 967 &sensor_dev_attr_fan1_min.dev_attr.attr, 968 969 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 970 NULL 971 }; 972 973 static const struct attribute_group lm63_group_fan1 = { 974 .attrs = lm63_attributes_fan1, 975 }; 976 977 /* 978 * Real code 979 */ 980 981 /* Return 0 if detection is successful, -ENODEV otherwise */ 982 static int lm63_detect(struct i2c_client *client, 983 struct i2c_board_info *info) 984 { 985 struct i2c_adapter *adapter = client->adapter; 986 u8 man_id, chip_id, reg_config1, reg_config2; 987 u8 reg_alert_status, reg_alert_mask; 988 int address = client->addr; 989 990 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 991 return -ENODEV; 992 993 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 994 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 995 996 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 997 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 998 reg_alert_status = i2c_smbus_read_byte_data(client, 999 LM63_REG_ALERT_STATUS); 1000 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1001 1002 if (man_id != 0x01 /* National Semiconductor */ 1003 || (reg_config1 & 0x18) != 0x00 1004 || (reg_config2 & 0xF8) != 0x00 1005 || (reg_alert_status & 0x20) != 0x00 1006 || (reg_alert_mask & 0xA4) != 0xA4) { 1007 dev_dbg(&adapter->dev, 1008 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1009 man_id, chip_id); 1010 return -ENODEV; 1011 } 1012 1013 if (chip_id == 0x41 && address == 0x4c) 1014 strlcpy(info->type, "lm63", I2C_NAME_SIZE); 1015 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1016 strlcpy(info->type, "lm64", I2C_NAME_SIZE); 1017 else if (chip_id == 0x49 && address == 0x4c) 1018 strlcpy(info->type, "lm96163", I2C_NAME_SIZE); 1019 else 1020 return -ENODEV; 1021 1022 return 0; 1023 } 1024 1025 /* 1026 * Ideally we shouldn't have to initialize anything, since the BIOS 1027 * should have taken care of everything 1028 */ 1029 static void lm63_init_client(struct i2c_client *client) 1030 { 1031 struct lm63_data *data = i2c_get_clientdata(client); 1032 u8 convrate; 1033 1034 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1035 data->config_fan = i2c_smbus_read_byte_data(client, 1036 LM63_REG_CONFIG_FAN); 1037 1038 /* Start converting if needed */ 1039 if (data->config & 0x40) { /* standby */ 1040 dev_dbg(&client->dev, "Switching to operational mode\n"); 1041 data->config &= 0xA7; 1042 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1043 data->config); 1044 } 1045 /* Tachometer is always enabled on LM64 */ 1046 if (data->kind == lm64) 1047 data->config |= 0x04; 1048 1049 /* We may need pwm1_freq before ever updating the client data */ 1050 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1051 if (data->pwm1_freq == 0) 1052 data->pwm1_freq = 1; 1053 1054 switch (data->kind) { 1055 case lm63: 1056 case lm64: 1057 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1058 data->lut_size = 8; 1059 break; 1060 case lm96163: 1061 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1062 data->lut_size = 12; 1063 data->trutherm 1064 = i2c_smbus_read_byte_data(client, 1065 LM96163_REG_TRUTHERM) & 0x02; 1066 break; 1067 } 1068 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1069 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1070 convrate = LM63_MAX_CONVRATE; 1071 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1072 convrate); 1073 1074 /* 1075 * For LM96163, check if high resolution PWM 1076 * and unsigned temperature format is enabled. 1077 */ 1078 if (data->kind == lm96163) { 1079 u8 config_enhanced 1080 = i2c_smbus_read_byte_data(client, 1081 LM96163_REG_CONFIG_ENHANCED); 1082 if (config_enhanced & 0x20) 1083 data->lut_temp_highres = true; 1084 if ((config_enhanced & 0x10) 1085 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1086 data->pwm_highres = true; 1087 if (config_enhanced & 0x08) 1088 data->remote_unsigned = true; 1089 } 1090 1091 /* Show some debug info about the LM63 configuration */ 1092 if (data->kind == lm63) 1093 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", 1094 (data->config & 0x04) ? "tachometer input" : 1095 "alert output"); 1096 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", 1097 (data->config_fan & 0x08) ? "1.4" : "360", 1098 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1099 dev_dbg(&client->dev, "PWM output active %s, %s mode\n", 1100 (data->config_fan & 0x10) ? "low" : "high", 1101 (data->config_fan & 0x20) ? "manual" : "auto"); 1102 } 1103 1104 static int lm63_probe(struct i2c_client *client, 1105 const struct i2c_device_id *id) 1106 { 1107 struct lm63_data *data; 1108 int err; 1109 1110 data = devm_kzalloc(&client->dev, sizeof(struct lm63_data), GFP_KERNEL); 1111 if (!data) 1112 return -ENOMEM; 1113 1114 i2c_set_clientdata(client, data); 1115 data->valid = 0; 1116 mutex_init(&data->update_lock); 1117 1118 /* Set the device type */ 1119 data->kind = id->driver_data; 1120 if (data->kind == lm64) 1121 data->temp2_offset = 16000; 1122 1123 /* Initialize chip */ 1124 lm63_init_client(client); 1125 1126 /* Register sysfs hooks */ 1127 err = sysfs_create_group(&client->dev.kobj, &lm63_group); 1128 if (err) 1129 return err; 1130 if (data->config & 0x04) { /* tachometer enabled */ 1131 err = sysfs_create_group(&client->dev.kobj, &lm63_group_fan1); 1132 if (err) 1133 goto exit_remove_files; 1134 } 1135 if (data->kind == lm96163) { 1136 err = device_create_file(&client->dev, &dev_attr_temp2_type); 1137 if (err) 1138 goto exit_remove_files; 1139 1140 err = sysfs_create_group(&client->dev.kobj, 1141 &lm63_group_extra_lut); 1142 if (err) 1143 goto exit_remove_files; 1144 } 1145 1146 data->hwmon_dev = hwmon_device_register(&client->dev); 1147 if (IS_ERR(data->hwmon_dev)) { 1148 err = PTR_ERR(data->hwmon_dev); 1149 goto exit_remove_files; 1150 } 1151 1152 return 0; 1153 1154 exit_remove_files: 1155 sysfs_remove_group(&client->dev.kobj, &lm63_group); 1156 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); 1157 if (data->kind == lm96163) { 1158 device_remove_file(&client->dev, &dev_attr_temp2_type); 1159 sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut); 1160 } 1161 return err; 1162 } 1163 1164 static int lm63_remove(struct i2c_client *client) 1165 { 1166 struct lm63_data *data = i2c_get_clientdata(client); 1167 1168 hwmon_device_unregister(data->hwmon_dev); 1169 sysfs_remove_group(&client->dev.kobj, &lm63_group); 1170 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); 1171 if (data->kind == lm96163) { 1172 device_remove_file(&client->dev, &dev_attr_temp2_type); 1173 sysfs_remove_group(&client->dev.kobj, &lm63_group_extra_lut); 1174 } 1175 1176 return 0; 1177 } 1178 1179 /* 1180 * Driver data (common to all clients) 1181 */ 1182 1183 static const struct i2c_device_id lm63_id[] = { 1184 { "lm63", lm63 }, 1185 { "lm64", lm64 }, 1186 { "lm96163", lm96163 }, 1187 { } 1188 }; 1189 MODULE_DEVICE_TABLE(i2c, lm63_id); 1190 1191 static struct i2c_driver lm63_driver = { 1192 .class = I2C_CLASS_HWMON, 1193 .driver = { 1194 .name = "lm63", 1195 }, 1196 .probe = lm63_probe, 1197 .remove = lm63_remove, 1198 .id_table = lm63_id, 1199 .detect = lm63_detect, 1200 .address_list = normal_i2c, 1201 }; 1202 1203 module_i2c_driver(lm63_driver); 1204 1205 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 1206 MODULE_DESCRIPTION("LM63 driver"); 1207 MODULE_LICENSE("GPL"); 1208