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/of_device.h> 50 #include <linux/sysfs.h> 51 #include <linux/types.h> 52 53 /* 54 * Addresses to scan 55 * Address is fully defined internally and cannot be changed except for 56 * LM64 which has one pin dedicated to address selection. 57 * LM63 and LM96163 have address 0x4c. 58 * LM64 can have address 0x18 or 0x4e. 59 */ 60 61 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END }; 62 63 /* 64 * The LM63 registers 65 */ 66 67 #define LM63_REG_CONFIG1 0x03 68 #define LM63_REG_CONVRATE 0x04 69 #define LM63_REG_CONFIG2 0xBF 70 #define LM63_REG_CONFIG_FAN 0x4A 71 72 #define LM63_REG_TACH_COUNT_MSB 0x47 73 #define LM63_REG_TACH_COUNT_LSB 0x46 74 #define LM63_REG_TACH_LIMIT_MSB 0x49 75 #define LM63_REG_TACH_LIMIT_LSB 0x48 76 77 #define LM63_REG_PWM_VALUE 0x4C 78 #define LM63_REG_PWM_FREQ 0x4D 79 #define LM63_REG_LUT_TEMP_HYST 0x4F 80 #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr)) 81 #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr)) 82 83 #define LM63_REG_LOCAL_TEMP 0x00 84 #define LM63_REG_LOCAL_HIGH 0x05 85 86 #define LM63_REG_REMOTE_TEMP_MSB 0x01 87 #define LM63_REG_REMOTE_TEMP_LSB 0x10 88 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 89 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 90 #define LM63_REG_REMOTE_HIGH_MSB 0x07 91 #define LM63_REG_REMOTE_HIGH_LSB 0x13 92 #define LM63_REG_REMOTE_LOW_MSB 0x08 93 #define LM63_REG_REMOTE_LOW_LSB 0x14 94 #define LM63_REG_REMOTE_TCRIT 0x19 95 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 96 97 #define LM63_REG_ALERT_STATUS 0x02 98 #define LM63_REG_ALERT_MASK 0x16 99 100 #define LM63_REG_MAN_ID 0xFE 101 #define LM63_REG_CHIP_ID 0xFF 102 103 #define LM96163_REG_TRUTHERM 0x30 104 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31 105 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32 106 #define LM96163_REG_CONFIG_ENHANCED 0x45 107 108 #define LM63_MAX_CONVRATE 9 109 110 #define LM63_MAX_CONVRATE_HZ 32 111 #define LM96163_MAX_CONVRATE_HZ 26 112 113 /* 114 * Conversions and various macros 115 * For tachometer counts, the LM63 uses 16-bit values. 116 * For local temperature and high limit, remote critical limit and hysteresis 117 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 118 * For remote temperature, low and high limits, it uses signed 11-bit values 119 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 120 * For LM64 the actual remote diode temperature is 16 degree Celsius higher 121 * than the register reading. Remote temperature setpoints have to be 122 * adapted accordingly. 123 */ 124 125 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 126 5400000 / (reg)) 127 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 128 (5400000 / (val)) & 0xFFFC) 129 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 130 #define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 131 127000), 1000) 132 #define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 133 255000), 1000) 134 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 135 #define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 136 127875), 125) * 32) 137 #define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 138 255875), 125) * 32) 139 #define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \ 140 1000) 141 142 #define UPDATE_INTERVAL(max, rate) \ 143 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) 144 145 enum chips { lm63, lm64, lm96163 }; 146 147 /* 148 * Client data (each client gets its own) 149 */ 150 151 struct lm63_data { 152 struct i2c_client *client; 153 struct mutex update_lock; 154 const struct attribute_group *groups[5]; 155 char valid; /* zero until following fields are valid */ 156 char lut_valid; /* zero until lut fields are valid */ 157 unsigned long last_updated; /* in jiffies */ 158 unsigned long lut_last_updated; /* in jiffies */ 159 enum chips kind; 160 int temp2_offset; 161 162 int update_interval; /* in milliseconds */ 163 int max_convrate_hz; 164 int lut_size; /* 8 or 12 */ 165 166 /* registers values */ 167 u8 config, config_fan; 168 u16 fan[2]; /* 0: input 169 1: low limit */ 170 u8 pwm1_freq; 171 u8 pwm1[13]; /* 0: current output 172 1-12: lookup table */ 173 s8 temp8[15]; /* 0: local input 174 1: local high limit 175 2: remote critical limit 176 3-14: lookup table */ 177 s16 temp11[4]; /* 0: remote input 178 1: remote low limit 179 2: remote high limit 180 3: remote offset */ 181 u16 temp11u; /* remote input (unsigned) */ 182 u8 temp2_crit_hyst; 183 u8 lut_temp_hyst; 184 u8 alarms; 185 bool pwm_highres; 186 bool lut_temp_highres; 187 bool remote_unsigned; /* true if unsigned remote upper limits */ 188 bool trutherm; 189 }; 190 191 static inline int temp8_from_reg(struct lm63_data *data, int nr) 192 { 193 if (data->remote_unsigned) 194 return TEMP8_FROM_REG((u8)data->temp8[nr]); 195 return TEMP8_FROM_REG(data->temp8[nr]); 196 } 197 198 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 199 { 200 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 201 } 202 203 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 204 { 205 val -= data->temp2_offset; 206 if (data->lut_temp_highres) 207 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); 208 else 209 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); 210 } 211 212 /* 213 * Update the lookup table register cache. 214 * client->update_lock must be held when calling this function. 215 */ 216 static void lm63_update_lut(struct lm63_data *data) 217 { 218 struct i2c_client *client = data->client; 219 int i; 220 221 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 222 !data->lut_valid) { 223 for (i = 0; i < data->lut_size; i++) { 224 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 225 LM63_REG_LUT_PWM(i)); 226 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 227 LM63_REG_LUT_TEMP(i)); 228 } 229 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 230 LM63_REG_LUT_TEMP_HYST); 231 232 data->lut_last_updated = jiffies; 233 data->lut_valid = 1; 234 } 235 } 236 237 static struct lm63_data *lm63_update_device(struct device *dev) 238 { 239 struct lm63_data *data = dev_get_drvdata(dev); 240 struct i2c_client *client = data->client; 241 unsigned long next_update; 242 243 mutex_lock(&data->update_lock); 244 245 next_update = data->last_updated + 246 msecs_to_jiffies(data->update_interval); 247 if (time_after(jiffies, next_update) || !data->valid) { 248 if (data->config & 0x04) { /* tachometer enabled */ 249 /* order matters for fan1_input */ 250 data->fan[0] = i2c_smbus_read_byte_data(client, 251 LM63_REG_TACH_COUNT_LSB) & 0xFC; 252 data->fan[0] |= i2c_smbus_read_byte_data(client, 253 LM63_REG_TACH_COUNT_MSB) << 8; 254 data->fan[1] = (i2c_smbus_read_byte_data(client, 255 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 256 | (i2c_smbus_read_byte_data(client, 257 LM63_REG_TACH_LIMIT_MSB) << 8); 258 } 259 260 data->pwm1_freq = i2c_smbus_read_byte_data(client, 261 LM63_REG_PWM_FREQ); 262 if (data->pwm1_freq == 0) 263 data->pwm1_freq = 1; 264 data->pwm1[0] = i2c_smbus_read_byte_data(client, 265 LM63_REG_PWM_VALUE); 266 267 data->temp8[0] = i2c_smbus_read_byte_data(client, 268 LM63_REG_LOCAL_TEMP); 269 data->temp8[1] = i2c_smbus_read_byte_data(client, 270 LM63_REG_LOCAL_HIGH); 271 272 /* order matters for temp2_input */ 273 data->temp11[0] = i2c_smbus_read_byte_data(client, 274 LM63_REG_REMOTE_TEMP_MSB) << 8; 275 data->temp11[0] |= i2c_smbus_read_byte_data(client, 276 LM63_REG_REMOTE_TEMP_LSB); 277 data->temp11[1] = (i2c_smbus_read_byte_data(client, 278 LM63_REG_REMOTE_LOW_MSB) << 8) 279 | i2c_smbus_read_byte_data(client, 280 LM63_REG_REMOTE_LOW_LSB); 281 data->temp11[2] = (i2c_smbus_read_byte_data(client, 282 LM63_REG_REMOTE_HIGH_MSB) << 8) 283 | i2c_smbus_read_byte_data(client, 284 LM63_REG_REMOTE_HIGH_LSB); 285 data->temp11[3] = (i2c_smbus_read_byte_data(client, 286 LM63_REG_REMOTE_OFFSET_MSB) << 8) 287 | i2c_smbus_read_byte_data(client, 288 LM63_REG_REMOTE_OFFSET_LSB); 289 290 if (data->kind == lm96163) 291 data->temp11u = (i2c_smbus_read_byte_data(client, 292 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 293 | i2c_smbus_read_byte_data(client, 294 LM96163_REG_REMOTE_TEMP_U_LSB); 295 296 data->temp8[2] = i2c_smbus_read_byte_data(client, 297 LM63_REG_REMOTE_TCRIT); 298 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 299 LM63_REG_REMOTE_TCRIT_HYST); 300 301 data->alarms = i2c_smbus_read_byte_data(client, 302 LM63_REG_ALERT_STATUS) & 0x7F; 303 304 data->last_updated = jiffies; 305 data->valid = 1; 306 } 307 308 lm63_update_lut(data); 309 310 mutex_unlock(&data->update_lock); 311 312 return data; 313 } 314 315 /* 316 * Trip points in the lookup table should be in ascending order for both 317 * temperatures and PWM output values. 318 */ 319 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) 320 { 321 int i; 322 323 mutex_lock(&data->update_lock); 324 lm63_update_lut(data); 325 326 for (i = 1; i < data->lut_size; i++) { 327 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 328 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 329 dev_warn(dev, 330 "Lookup table doesn't look sane (check entries %d and %d)\n", 331 i, i + 1); 332 break; 333 } 334 } 335 mutex_unlock(&data->update_lock); 336 337 return i == data->lut_size ? 0 : 1; 338 } 339 340 /* 341 * Sysfs callback functions and files 342 */ 343 344 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 345 char *buf) 346 { 347 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 348 struct lm63_data *data = lm63_update_device(dev); 349 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); 350 } 351 352 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 353 const char *buf, size_t count) 354 { 355 struct lm63_data *data = dev_get_drvdata(dev); 356 struct i2c_client *client = data->client; 357 unsigned long val; 358 int err; 359 360 err = kstrtoul(buf, 10, &val); 361 if (err) 362 return err; 363 364 mutex_lock(&data->update_lock); 365 data->fan[1] = FAN_TO_REG(val); 366 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 367 data->fan[1] & 0xFF); 368 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 369 data->fan[1] >> 8); 370 mutex_unlock(&data->update_lock); 371 return count; 372 } 373 374 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 375 char *buf) 376 { 377 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 378 struct lm63_data *data = lm63_update_device(dev); 379 int nr = attr->index; 380 int pwm; 381 382 if (data->pwm_highres) 383 pwm = data->pwm1[nr]; 384 else 385 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 386 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 387 (2 * data->pwm1_freq); 388 389 return sprintf(buf, "%d\n", pwm); 390 } 391 392 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 393 const char *buf, size_t count) 394 { 395 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 396 struct lm63_data *data = dev_get_drvdata(dev); 397 struct i2c_client *client = data->client; 398 int nr = attr->index; 399 unsigned long val; 400 int err; 401 u8 reg; 402 403 if (!(data->config_fan & 0x20)) /* register is read-only */ 404 return -EPERM; 405 406 err = kstrtoul(buf, 10, &val); 407 if (err) 408 return err; 409 410 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 411 val = clamp_val(val, 0, 255); 412 413 mutex_lock(&data->update_lock); 414 data->pwm1[nr] = data->pwm_highres ? val : 415 (val * data->pwm1_freq * 2 + 127) / 255; 416 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 417 mutex_unlock(&data->update_lock); 418 return count; 419 } 420 421 static ssize_t pwm1_enable_show(struct device *dev, 422 struct device_attribute *dummy, char *buf) 423 { 424 struct lm63_data *data = lm63_update_device(dev); 425 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 426 } 427 428 static ssize_t pwm1_enable_store(struct device *dev, 429 struct device_attribute *dummy, 430 const char *buf, size_t count) 431 { 432 struct lm63_data *data = dev_get_drvdata(dev); 433 struct i2c_client *client = data->client; 434 unsigned long val; 435 int err; 436 437 err = kstrtoul(buf, 10, &val); 438 if (err) 439 return err; 440 if (val < 1 || val > 2) 441 return -EINVAL; 442 443 /* 444 * Only let the user switch to automatic mode if the lookup table 445 * looks sane. 446 */ 447 if (val == 2 && lm63_lut_looks_bad(dev, data)) 448 return -EPERM; 449 450 mutex_lock(&data->update_lock); 451 data->config_fan = i2c_smbus_read_byte_data(client, 452 LM63_REG_CONFIG_FAN); 453 if (val == 1) 454 data->config_fan |= 0x20; 455 else 456 data->config_fan &= ~0x20; 457 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 458 data->config_fan); 459 mutex_unlock(&data->update_lock); 460 return count; 461 } 462 463 /* 464 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 465 * For remote sensor registers temp2_offset has to be considered, 466 * for local sensor it must not. 467 * So we need separate 8bit accessors for local and remote sensor. 468 */ 469 static ssize_t show_local_temp8(struct device *dev, 470 struct device_attribute *devattr, 471 char *buf) 472 { 473 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 474 struct lm63_data *data = lm63_update_device(dev); 475 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 476 } 477 478 static ssize_t show_remote_temp8(struct device *dev, 479 struct device_attribute *devattr, 480 char *buf) 481 { 482 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 483 struct lm63_data *data = lm63_update_device(dev); 484 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 485 + data->temp2_offset); 486 } 487 488 static ssize_t show_lut_temp(struct device *dev, 489 struct device_attribute *devattr, 490 char *buf) 491 { 492 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 493 struct lm63_data *data = lm63_update_device(dev); 494 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 495 + data->temp2_offset); 496 } 497 498 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 499 const char *buf, size_t count) 500 { 501 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 502 struct lm63_data *data = dev_get_drvdata(dev); 503 struct i2c_client *client = data->client; 504 int nr = attr->index; 505 long val; 506 int err; 507 int temp; 508 u8 reg; 509 510 err = kstrtol(buf, 10, &val); 511 if (err) 512 return err; 513 514 mutex_lock(&data->update_lock); 515 switch (nr) { 516 case 2: 517 reg = LM63_REG_REMOTE_TCRIT; 518 if (data->remote_unsigned) 519 temp = TEMP8U_TO_REG(val - data->temp2_offset); 520 else 521 temp = TEMP8_TO_REG(val - data->temp2_offset); 522 break; 523 case 1: 524 reg = LM63_REG_LOCAL_HIGH; 525 temp = TEMP8_TO_REG(val); 526 break; 527 default: /* lookup table */ 528 reg = LM63_REG_LUT_TEMP(nr - 3); 529 temp = lut_temp_to_reg(data, val); 530 } 531 data->temp8[nr] = temp; 532 i2c_smbus_write_byte_data(client, reg, temp); 533 mutex_unlock(&data->update_lock); 534 return count; 535 } 536 537 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 538 char *buf) 539 { 540 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 541 struct lm63_data *data = lm63_update_device(dev); 542 int nr = attr->index; 543 int temp; 544 545 if (!nr) { 546 /* 547 * Use unsigned temperature unless its value is zero. 548 * If it is zero, use signed temperature. 549 */ 550 if (data->temp11u) 551 temp = TEMP11_FROM_REG(data->temp11u); 552 else 553 temp = TEMP11_FROM_REG(data->temp11[nr]); 554 } else { 555 if (data->remote_unsigned && nr == 2) 556 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 557 else 558 temp = TEMP11_FROM_REG(data->temp11[nr]); 559 } 560 return sprintf(buf, "%d\n", temp + data->temp2_offset); 561 } 562 563 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 564 const char *buf, size_t count) 565 { 566 static const u8 reg[6] = { 567 LM63_REG_REMOTE_LOW_MSB, 568 LM63_REG_REMOTE_LOW_LSB, 569 LM63_REG_REMOTE_HIGH_MSB, 570 LM63_REG_REMOTE_HIGH_LSB, 571 LM63_REG_REMOTE_OFFSET_MSB, 572 LM63_REG_REMOTE_OFFSET_LSB, 573 }; 574 575 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 576 struct lm63_data *data = dev_get_drvdata(dev); 577 struct i2c_client *client = data->client; 578 long val; 579 int err; 580 int nr = attr->index; 581 582 err = kstrtol(buf, 10, &val); 583 if (err) 584 return err; 585 586 mutex_lock(&data->update_lock); 587 if (data->remote_unsigned && nr == 2) 588 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 589 else 590 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 591 592 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 593 data->temp11[nr] >> 8); 594 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 595 data->temp11[nr] & 0xff); 596 mutex_unlock(&data->update_lock); 597 return count; 598 } 599 600 /* 601 * Hysteresis register holds a relative value, while we want to present 602 * an absolute to user-space 603 */ 604 static ssize_t temp2_crit_hyst_show(struct device *dev, 605 struct device_attribute *dummy, char *buf) 606 { 607 struct lm63_data *data = lm63_update_device(dev); 608 return sprintf(buf, "%d\n", temp8_from_reg(data, 2) 609 + data->temp2_offset 610 - TEMP8_FROM_REG(data->temp2_crit_hyst)); 611 } 612 613 static ssize_t show_lut_temp_hyst(struct device *dev, 614 struct device_attribute *devattr, char *buf) 615 { 616 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 617 struct lm63_data *data = lm63_update_device(dev); 618 619 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 620 + data->temp2_offset 621 - TEMP8_FROM_REG(data->lut_temp_hyst)); 622 } 623 624 /* 625 * And now the other way around, user-space provides an absolute 626 * hysteresis value and we have to store a relative one 627 */ 628 static ssize_t temp2_crit_hyst_store(struct device *dev, 629 struct device_attribute *dummy, 630 const char *buf, size_t count) 631 { 632 struct lm63_data *data = dev_get_drvdata(dev); 633 struct i2c_client *client = data->client; 634 long val; 635 int err; 636 long hyst; 637 638 err = kstrtol(buf, 10, &val); 639 if (err) 640 return err; 641 642 mutex_lock(&data->update_lock); 643 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 644 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 645 HYST_TO_REG(hyst)); 646 mutex_unlock(&data->update_lock); 647 return count; 648 } 649 650 /* 651 * Set conversion rate. 652 * client->update_lock must be held when calling this function. 653 */ 654 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) 655 { 656 struct i2c_client *client = data->client; 657 unsigned int update_interval; 658 int i; 659 660 /* Shift calculations to avoid rounding errors */ 661 interval <<= 6; 662 663 /* find the nearest update rate */ 664 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 665 / data->max_convrate_hz; 666 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 667 if (interval >= update_interval * 3 / 4) 668 break; 669 670 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 671 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 672 } 673 674 static ssize_t update_interval_show(struct device *dev, 675 struct device_attribute *attr, char *buf) 676 { 677 struct lm63_data *data = dev_get_drvdata(dev); 678 679 return sprintf(buf, "%u\n", data->update_interval); 680 } 681 682 static ssize_t update_interval_store(struct device *dev, 683 struct device_attribute *attr, 684 const char *buf, size_t count) 685 { 686 struct lm63_data *data = dev_get_drvdata(dev); 687 unsigned long val; 688 int err; 689 690 err = kstrtoul(buf, 10, &val); 691 if (err) 692 return err; 693 694 mutex_lock(&data->update_lock); 695 lm63_set_convrate(data, clamp_val(val, 0, 100000)); 696 mutex_unlock(&data->update_lock); 697 698 return count; 699 } 700 701 static ssize_t temp2_type_show(struct device *dev, 702 struct device_attribute *attr, char *buf) 703 { 704 struct lm63_data *data = dev_get_drvdata(dev); 705 706 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 707 } 708 709 static ssize_t temp2_type_store(struct device *dev, 710 struct device_attribute *attr, 711 const char *buf, size_t count) 712 { 713 struct lm63_data *data = dev_get_drvdata(dev); 714 struct i2c_client *client = data->client; 715 unsigned long val; 716 int ret; 717 u8 reg; 718 719 ret = kstrtoul(buf, 10, &val); 720 if (ret < 0) 721 return ret; 722 if (val != 1 && val != 2) 723 return -EINVAL; 724 725 mutex_lock(&data->update_lock); 726 data->trutherm = val == 1; 727 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 728 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 729 reg | (data->trutherm ? 0x02 : 0x00)); 730 data->valid = 0; 731 mutex_unlock(&data->update_lock); 732 733 return count; 734 } 735 736 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, 737 char *buf) 738 { 739 struct lm63_data *data = lm63_update_device(dev); 740 return sprintf(buf, "%u\n", data->alarms); 741 } 742 743 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 744 char *buf) 745 { 746 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 747 struct lm63_data *data = lm63_update_device(dev); 748 int bitnr = attr->index; 749 750 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 751 } 752 753 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 754 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 755 set_fan, 1); 756 757 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 758 static DEVICE_ATTR_RW(pwm1_enable); 759 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 760 show_pwm1, set_pwm1, 1); 761 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 762 show_lut_temp, set_temp8, 3); 763 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 764 show_lut_temp_hyst, NULL, 3); 765 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 766 show_pwm1, set_pwm1, 2); 767 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 768 show_lut_temp, set_temp8, 4); 769 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 770 show_lut_temp_hyst, NULL, 4); 771 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 772 show_pwm1, set_pwm1, 3); 773 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 774 show_lut_temp, set_temp8, 5); 775 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 776 show_lut_temp_hyst, NULL, 5); 777 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 778 show_pwm1, set_pwm1, 4); 779 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 780 show_lut_temp, set_temp8, 6); 781 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 782 show_lut_temp_hyst, NULL, 6); 783 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 784 show_pwm1, set_pwm1, 5); 785 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 786 show_lut_temp, set_temp8, 7); 787 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 788 show_lut_temp_hyst, NULL, 7); 789 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 790 show_pwm1, set_pwm1, 6); 791 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 792 show_lut_temp, set_temp8, 8); 793 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 794 show_lut_temp_hyst, NULL, 8); 795 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 796 show_pwm1, set_pwm1, 7); 797 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 798 show_lut_temp, set_temp8, 9); 799 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 800 show_lut_temp_hyst, NULL, 9); 801 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 802 show_pwm1, set_pwm1, 8); 803 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 804 show_lut_temp, set_temp8, 10); 805 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 806 show_lut_temp_hyst, NULL, 10); 807 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 808 show_pwm1, set_pwm1, 9); 809 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 810 show_lut_temp, set_temp8, 11); 811 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 812 show_lut_temp_hyst, NULL, 11); 813 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 814 show_pwm1, set_pwm1, 10); 815 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 816 show_lut_temp, set_temp8, 12); 817 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 818 show_lut_temp_hyst, NULL, 12); 819 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 820 show_pwm1, set_pwm1, 11); 821 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 822 show_lut_temp, set_temp8, 13); 823 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 824 show_lut_temp_hyst, NULL, 13); 825 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 826 show_pwm1, set_pwm1, 12); 827 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 828 show_lut_temp, set_temp8, 14); 829 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 830 show_lut_temp_hyst, NULL, 14); 831 832 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 833 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 834 set_temp8, 1); 835 836 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 837 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 838 set_temp11, 1); 839 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 840 set_temp11, 2); 841 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 842 set_temp11, 3); 843 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 844 set_temp8, 2); 845 static DEVICE_ATTR_RW(temp2_crit_hyst); 846 847 static DEVICE_ATTR_RW(temp2_type); 848 849 /* Individual alarm files */ 850 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 851 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 852 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 853 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 854 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 855 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 856 /* Raw alarm file for compatibility */ 857 static DEVICE_ATTR_RO(alarms); 858 859 static DEVICE_ATTR_RW(update_interval); 860 861 static struct attribute *lm63_attributes[] = { 862 &sensor_dev_attr_pwm1.dev_attr.attr, 863 &dev_attr_pwm1_enable.attr, 864 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 865 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 866 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 867 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 868 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 869 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 870 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 871 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 872 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 873 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 874 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 875 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 876 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 877 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 878 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 879 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 880 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 881 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 882 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 883 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 884 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 885 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 886 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 887 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 888 889 &sensor_dev_attr_temp1_input.dev_attr.attr, 890 &sensor_dev_attr_temp2_input.dev_attr.attr, 891 &sensor_dev_attr_temp2_min.dev_attr.attr, 892 &sensor_dev_attr_temp1_max.dev_attr.attr, 893 &sensor_dev_attr_temp2_max.dev_attr.attr, 894 &sensor_dev_attr_temp2_offset.dev_attr.attr, 895 &sensor_dev_attr_temp2_crit.dev_attr.attr, 896 &dev_attr_temp2_crit_hyst.attr, 897 898 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 899 &sensor_dev_attr_temp2_fault.dev_attr.attr, 900 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 901 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 902 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 903 &dev_attr_alarms.attr, 904 &dev_attr_update_interval.attr, 905 NULL 906 }; 907 908 static struct attribute *lm63_attributes_temp2_type[] = { 909 &dev_attr_temp2_type.attr, 910 NULL 911 }; 912 913 static const struct attribute_group lm63_group_temp2_type = { 914 .attrs = lm63_attributes_temp2_type, 915 }; 916 917 static struct attribute *lm63_attributes_extra_lut[] = { 918 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 919 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 920 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 921 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 922 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 923 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 924 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 925 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 926 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 927 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 928 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 929 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 930 NULL 931 }; 932 933 static const struct attribute_group lm63_group_extra_lut = { 934 .attrs = lm63_attributes_extra_lut, 935 }; 936 937 /* 938 * On LM63, temp2_crit can be set only once, which should be job 939 * of the bootloader. 940 * On LM64, temp2_crit can always be set. 941 * On LM96163, temp2_crit can be set if bit 1 of the configuration 942 * register is true. 943 */ 944 static umode_t lm63_attribute_mode(struct kobject *kobj, 945 struct attribute *attr, int index) 946 { 947 struct device *dev = container_of(kobj, struct device, kobj); 948 struct lm63_data *data = dev_get_drvdata(dev); 949 950 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 951 && (data->kind == lm64 || 952 (data->kind == lm96163 && (data->config & 0x02)))) 953 return attr->mode | S_IWUSR; 954 955 return attr->mode; 956 } 957 958 static const struct attribute_group lm63_group = { 959 .is_visible = lm63_attribute_mode, 960 .attrs = lm63_attributes, 961 }; 962 963 static struct attribute *lm63_attributes_fan1[] = { 964 &sensor_dev_attr_fan1_input.dev_attr.attr, 965 &sensor_dev_attr_fan1_min.dev_attr.attr, 966 967 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 968 NULL 969 }; 970 971 static const struct attribute_group lm63_group_fan1 = { 972 .attrs = lm63_attributes_fan1, 973 }; 974 975 /* 976 * Real code 977 */ 978 979 /* Return 0 if detection is successful, -ENODEV otherwise */ 980 static int lm63_detect(struct i2c_client *client, 981 struct i2c_board_info *info) 982 { 983 struct i2c_adapter *adapter = client->adapter; 984 u8 man_id, chip_id, reg_config1, reg_config2; 985 u8 reg_alert_status, reg_alert_mask; 986 int address = client->addr; 987 988 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 989 return -ENODEV; 990 991 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 992 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 993 994 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 995 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 996 reg_alert_status = i2c_smbus_read_byte_data(client, 997 LM63_REG_ALERT_STATUS); 998 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 999 1000 if (man_id != 0x01 /* National Semiconductor */ 1001 || (reg_config1 & 0x18) != 0x00 1002 || (reg_config2 & 0xF8) != 0x00 1003 || (reg_alert_status & 0x20) != 0x00 1004 || (reg_alert_mask & 0xA4) != 0xA4) { 1005 dev_dbg(&adapter->dev, 1006 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1007 man_id, chip_id); 1008 return -ENODEV; 1009 } 1010 1011 if (chip_id == 0x41 && address == 0x4c) 1012 strlcpy(info->type, "lm63", I2C_NAME_SIZE); 1013 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1014 strlcpy(info->type, "lm64", I2C_NAME_SIZE); 1015 else if (chip_id == 0x49 && address == 0x4c) 1016 strlcpy(info->type, "lm96163", I2C_NAME_SIZE); 1017 else 1018 return -ENODEV; 1019 1020 return 0; 1021 } 1022 1023 /* 1024 * Ideally we shouldn't have to initialize anything, since the BIOS 1025 * should have taken care of everything 1026 */ 1027 static void lm63_init_client(struct lm63_data *data) 1028 { 1029 struct i2c_client *client = data->client; 1030 struct device *dev = &client->dev; 1031 u8 convrate; 1032 1033 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1034 data->config_fan = i2c_smbus_read_byte_data(client, 1035 LM63_REG_CONFIG_FAN); 1036 1037 /* Start converting if needed */ 1038 if (data->config & 0x40) { /* standby */ 1039 dev_dbg(dev, "Switching to operational mode\n"); 1040 data->config &= 0xA7; 1041 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1042 data->config); 1043 } 1044 /* Tachometer is always enabled on LM64 */ 1045 if (data->kind == lm64) 1046 data->config |= 0x04; 1047 1048 /* We may need pwm1_freq before ever updating the client data */ 1049 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1050 if (data->pwm1_freq == 0) 1051 data->pwm1_freq = 1; 1052 1053 switch (data->kind) { 1054 case lm63: 1055 case lm64: 1056 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1057 data->lut_size = 8; 1058 break; 1059 case lm96163: 1060 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1061 data->lut_size = 12; 1062 data->trutherm 1063 = i2c_smbus_read_byte_data(client, 1064 LM96163_REG_TRUTHERM) & 0x02; 1065 break; 1066 } 1067 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1068 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1069 convrate = LM63_MAX_CONVRATE; 1070 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1071 convrate); 1072 1073 /* 1074 * For LM96163, check if high resolution PWM 1075 * and unsigned temperature format is enabled. 1076 */ 1077 if (data->kind == lm96163) { 1078 u8 config_enhanced 1079 = i2c_smbus_read_byte_data(client, 1080 LM96163_REG_CONFIG_ENHANCED); 1081 if (config_enhanced & 0x20) 1082 data->lut_temp_highres = true; 1083 if ((config_enhanced & 0x10) 1084 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1085 data->pwm_highres = true; 1086 if (config_enhanced & 0x08) 1087 data->remote_unsigned = true; 1088 } 1089 1090 /* Show some debug info about the LM63 configuration */ 1091 if (data->kind == lm63) 1092 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1093 (data->config & 0x04) ? "tachometer input" : 1094 "alert output"); 1095 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1096 (data->config_fan & 0x08) ? "1.4" : "360", 1097 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1098 dev_dbg(dev, "PWM output active %s, %s mode\n", 1099 (data->config_fan & 0x10) ? "low" : "high", 1100 (data->config_fan & 0x20) ? "manual" : "auto"); 1101 } 1102 1103 static int lm63_probe(struct i2c_client *client, 1104 const struct i2c_device_id *id) 1105 { 1106 struct device *dev = &client->dev; 1107 struct device *hwmon_dev; 1108 struct lm63_data *data; 1109 int groups = 0; 1110 1111 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1112 if (!data) 1113 return -ENOMEM; 1114 1115 data->client = client; 1116 mutex_init(&data->update_lock); 1117 1118 /* Set the device type */ 1119 if (client->dev.of_node) 1120 data->kind = (enum chips)of_device_get_match_data(&client->dev); 1121 else 1122 data->kind = id->driver_data; 1123 if (data->kind == lm64) 1124 data->temp2_offset = 16000; 1125 1126 /* Initialize chip */ 1127 lm63_init_client(data); 1128 1129 /* Register sysfs hooks */ 1130 data->groups[groups++] = &lm63_group; 1131 if (data->config & 0x04) /* tachometer enabled */ 1132 data->groups[groups++] = &lm63_group_fan1; 1133 1134 if (data->kind == lm96163) { 1135 data->groups[groups++] = &lm63_group_temp2_type; 1136 data->groups[groups++] = &lm63_group_extra_lut; 1137 } 1138 1139 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1140 data, data->groups); 1141 return PTR_ERR_OR_ZERO(hwmon_dev); 1142 } 1143 1144 /* 1145 * Driver data (common to all clients) 1146 */ 1147 1148 static const struct i2c_device_id lm63_id[] = { 1149 { "lm63", lm63 }, 1150 { "lm64", lm64 }, 1151 { "lm96163", lm96163 }, 1152 { } 1153 }; 1154 MODULE_DEVICE_TABLE(i2c, lm63_id); 1155 1156 static const struct of_device_id __maybe_unused lm63_of_match[] = { 1157 { 1158 .compatible = "national,lm63", 1159 .data = (void *)lm63 1160 }, 1161 { 1162 .compatible = "national,lm64", 1163 .data = (void *)lm64 1164 }, 1165 { 1166 .compatible = "national,lm96163", 1167 .data = (void *)lm96163 1168 }, 1169 { }, 1170 }; 1171 MODULE_DEVICE_TABLE(of, lm63_of_match); 1172 1173 static struct i2c_driver lm63_driver = { 1174 .class = I2C_CLASS_HWMON, 1175 .driver = { 1176 .name = "lm63", 1177 .of_match_table = of_match_ptr(lm63_of_match), 1178 }, 1179 .probe = lm63_probe, 1180 .id_table = lm63_id, 1181 .detect = lm63_detect, 1182 .address_list = normal_i2c, 1183 }; 1184 1185 module_i2c_driver(lm63_driver); 1186 1187 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1188 MODULE_DESCRIPTION("LM63 driver"); 1189 MODULE_LICENSE("GPL"); 1190