1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * lm63.c - driver for the National Semiconductor LM63 temperature sensor 4 * with integrated fan control 5 * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de> 6 * Based on the lm90 driver. 7 * 8 * The LM63 is a sensor chip made by National Semiconductor. It measures 9 * two temperatures (its own and one external one) and the speed of one 10 * fan, those speed it can additionally control. Complete datasheet can be 11 * obtained from National's website at: 12 * http://www.national.com/pf/LM/LM63.html 13 * 14 * The LM63 is basically an LM86 with fan speed monitoring and control 15 * capabilities added. It misses some of the LM86 features though: 16 * - No low limit for local temperature. 17 * - No critical limit for local temperature. 18 * - Critical limit for remote temperature can be changed only once. We 19 * will consider that the critical limit is read-only. 20 * 21 * The datasheet isn't very clear about what the tachometer reading is. 22 * I had a explanation from National Semiconductor though. The two lower 23 * bits of the read value have to be masked out. The value is still 16 bit 24 * in width. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/jiffies.h> 31 #include <linux/i2c.h> 32 #include <linux/hwmon-sysfs.h> 33 #include <linux/hwmon.h> 34 #include <linux/err.h> 35 #include <linux/mutex.h> 36 #include <linux/of.h> 37 #include <linux/sysfs.h> 38 #include <linux/thermal.h> 39 #include <linux/types.h> 40 41 /* 42 * Addresses to scan 43 * Address is fully defined internally and cannot be changed except for 44 * LM64 which has one pin dedicated to address selection. 45 * LM63, LM96163, and CTF2301 have address 0x4c. 46 * LM64 can have address 0x18 or 0x4e. 47 */ 48 49 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END }; 50 51 /* 52 * The LM63 registers 53 */ 54 55 #define LM63_REG_CONFIG1 0x03 56 #define LM63_REG_CONVRATE 0x04 57 #define LM63_REG_CONFIG2 0xBF 58 #define LM63_REG_CONFIG_FAN 0x4A 59 60 #define LM63_REG_TACH_COUNT_MSB 0x47 61 #define LM63_REG_TACH_COUNT_LSB 0x46 62 #define LM63_REG_TACH_LIMIT_MSB 0x49 63 #define LM63_REG_TACH_LIMIT_LSB 0x48 64 65 #define LM63_REG_PWM_VALUE 0x4C 66 #define LM63_REG_PWM_FREQ 0x4D 67 #define LM63_REG_LUT_TEMP_HYST 0x4F 68 #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr)) 69 #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr)) 70 71 #define LM63_REG_LOCAL_TEMP 0x00 72 #define LM63_REG_LOCAL_HIGH 0x05 73 74 #define CTF2301_REG_LOCAL_TEMP_LSB 0x15 75 #define CTF2301_REG_LOCAL_HIGH_LSB 0x06 76 77 #define LM63_REG_REMOTE_TEMP_MSB 0x01 78 #define LM63_REG_REMOTE_TEMP_LSB 0x10 79 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 80 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 81 #define LM63_REG_REMOTE_HIGH_MSB 0x07 82 #define LM63_REG_REMOTE_HIGH_LSB 0x13 83 #define LM63_REG_REMOTE_LOW_MSB 0x08 84 #define LM63_REG_REMOTE_LOW_LSB 0x14 85 #define LM63_REG_REMOTE_TCRIT 0x19 86 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 87 88 #define LM63_REG_ALERT_STATUS 0x02 89 #define LM63_REG_ALERT_MASK 0x16 90 91 #define LM63_REG_MAN_ID 0xFE 92 #define LM63_REG_CHIP_ID 0xFF 93 94 #define LM96163_REG_TRUTHERM 0x30 95 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31 96 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32 97 #define LM96163_REG_CONFIG_ENHANCED 0x45 98 99 #define LM63_PWM_BASE_FAST_HZ 180000 100 #define LM63_PWM_BASE_SLOW_HZ 700 101 #define LM63_MAX_PWM 255 102 103 #define LM63_MAX_CONVRATE 9 104 105 #define LM63_MAX_CONVRATE_HZ 32 106 #define LM96163_MAX_CONVRATE_HZ 26 107 108 /* 109 * Conversions and various macros 110 * For tachometer counts, the LM63 uses 16-bit values. 111 * For local temperature and high limit, remote critical limit and hysteresis 112 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 113 * For remote temperature, low and high limits, it uses signed 11-bit values 114 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 115 * For LM64 the actual remote diode temperature is 16 degree Celsius higher 116 * than the register reading. Remote temperature setpoints have to be 117 * adapted accordingly. 118 */ 119 120 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 121 5400000 / (reg)) 122 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 123 (5400000 / (val)) & 0xFFFC) 124 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 125 #define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 126 127000), 1000) 127 #define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 128 255000), 1000) 129 #define TEMP12_FROM_REG(reg) DIV_ROUND_CLOSEST((s16)(reg) * 1000, 256) 130 #define TEMP12_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 131 127937) * 16, 1000) * 16) 132 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 133 #define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 134 127875), 125) * 32) 135 #define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 136 255875), 125) * 32) 137 #define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \ 138 1000) 139 140 #define UPDATE_INTERVAL(max, rate) \ 141 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) 142 143 enum chips { ctf2301, lm63, lm64, lm96163 }; 144 145 static const unsigned int ctf2301_update_intervals[] = { 146 20000, 10000, 4902, 2463, 1000, 615, 307, 154, 107 147 }; 148 149 /* 150 * Client data (each client gets its own) 151 */ 152 153 struct lm63_data { 154 struct i2c_client *client; 155 struct mutex update_lock; 156 const struct attribute_group *groups[5]; 157 bool valid; /* false until following fields are valid */ 158 char lut_valid; /* zero until lut fields are valid */ 159 unsigned long last_updated; /* in jiffies */ 160 unsigned long lut_last_updated; /* in jiffies */ 161 enum chips kind; 162 int temp2_offset; 163 164 int update_interval; /* in milliseconds */ 165 int max_convrate_hz; 166 int lut_size; /* 8 or 12 */ 167 168 /* registers values */ 169 u8 config, config_fan; 170 u16 fan[2]; /* 0: input 171 1: low limit */ 172 u8 pwm1_freq; 173 u8 pwm1[13]; /* 0: current output 174 1-12: lookup table */ 175 s8 temp8[15]; /* 0: local input 176 1: local high limit 177 2: remote critical limit 178 3-14: lookup table */ 179 s16 temp1_input; /* local input for chips with extended resolution */ 180 s16 temp1_max; /* local limit for chips with extended resolution */ 181 s16 temp11[4]; /* 0: remote input 182 1: remote low limit 183 2: remote high limit 184 3: remote offset */ 185 u16 temp11u; /* remote input (unsigned) */ 186 u8 temp2_crit_hyst; 187 u8 lut_temp_hyst; 188 u8 alarms; 189 bool pwm_highres; 190 bool lut_temp_highres; 191 bool remote_unsigned; /* true if unsigned remote upper limits */ 192 bool trutherm; 193 }; 194 195 static inline int temp8_from_reg(struct lm63_data *data, int nr) 196 { 197 if (data->remote_unsigned) 198 return TEMP8_FROM_REG((u8)data->temp8[nr]); 199 return TEMP8_FROM_REG(data->temp8[nr]); 200 } 201 202 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 203 { 204 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 205 } 206 207 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 208 { 209 val -= data->temp2_offset; 210 if (data->lut_temp_highres) 211 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); 212 else 213 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); 214 } 215 216 /* 217 * Update the lookup table register cache. 218 * client->update_lock must be held when calling this function. 219 */ 220 static void lm63_update_lut(struct lm63_data *data) 221 { 222 struct i2c_client *client = data->client; 223 int i; 224 225 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 226 !data->lut_valid) { 227 for (i = 0; i < data->lut_size; i++) { 228 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 229 LM63_REG_LUT_PWM(i)); 230 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 231 LM63_REG_LUT_TEMP(i)); 232 } 233 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 234 LM63_REG_LUT_TEMP_HYST); 235 236 data->lut_last_updated = jiffies; 237 data->lut_valid = 1; 238 } 239 } 240 241 static struct lm63_data *lm63_update_device(struct device *dev) 242 { 243 struct lm63_data *data = dev_get_drvdata(dev); 244 struct i2c_client *client = data->client; 245 unsigned long next_update; 246 int msb, lsb; 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, LM63_REG_PWM_FREQ) & 0x1f; 266 if (data->pwm1_freq == 0) 267 data->pwm1_freq = 1; 268 data->pwm1[0] = i2c_smbus_read_byte_data(client, 269 LM63_REG_PWM_VALUE); 270 271 if (data->kind == ctf2301) { 272 msb = i2c_smbus_read_byte_data(client, 273 LM63_REG_LOCAL_TEMP); 274 lsb = i2c_smbus_read_byte_data(client, 275 CTF2301_REG_LOCAL_TEMP_LSB); 276 if (msb >= 0 && lsb >= 0) 277 data->temp1_input = ((u16)(u8)msb << 8) | lsb; 278 279 msb = i2c_smbus_read_byte_data(client, 280 LM63_REG_LOCAL_HIGH); 281 lsb = i2c_smbus_read_byte_data(client, 282 CTF2301_REG_LOCAL_HIGH_LSB); 283 if (msb >= 0 && lsb >= 0) 284 data->temp1_max = ((u16)(u8)msb << 8) | lsb; 285 } else { 286 data->temp8[0] = i2c_smbus_read_byte_data(client, 287 LM63_REG_LOCAL_TEMP); 288 data->temp8[1] = i2c_smbus_read_byte_data(client, 289 LM63_REG_LOCAL_HIGH); 290 } 291 292 /* order matters for temp2_input */ 293 data->temp11[0] = i2c_smbus_read_byte_data(client, 294 LM63_REG_REMOTE_TEMP_MSB) << 8; 295 data->temp11[0] |= i2c_smbus_read_byte_data(client, 296 LM63_REG_REMOTE_TEMP_LSB); 297 data->temp11[1] = (i2c_smbus_read_byte_data(client, 298 LM63_REG_REMOTE_LOW_MSB) << 8) 299 | i2c_smbus_read_byte_data(client, 300 LM63_REG_REMOTE_LOW_LSB); 301 data->temp11[2] = (i2c_smbus_read_byte_data(client, 302 LM63_REG_REMOTE_HIGH_MSB) << 8) 303 | i2c_smbus_read_byte_data(client, 304 LM63_REG_REMOTE_HIGH_LSB); 305 data->temp11[3] = (i2c_smbus_read_byte_data(client, 306 LM63_REG_REMOTE_OFFSET_MSB) << 8) 307 | i2c_smbus_read_byte_data(client, 308 LM63_REG_REMOTE_OFFSET_LSB); 309 310 if (data->kind == lm96163 || data->kind == ctf2301) 311 data->temp11u = (i2c_smbus_read_byte_data(client, 312 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 313 | i2c_smbus_read_byte_data(client, 314 LM96163_REG_REMOTE_TEMP_U_LSB); 315 316 data->temp8[2] = i2c_smbus_read_byte_data(client, 317 LM63_REG_REMOTE_TCRIT); 318 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 319 LM63_REG_REMOTE_TCRIT_HYST); 320 321 data->alarms = i2c_smbus_read_byte_data(client, 322 LM63_REG_ALERT_STATUS) & 0x7F; 323 324 data->last_updated = jiffies; 325 data->valid = true; 326 } 327 328 lm63_update_lut(data); 329 330 mutex_unlock(&data->update_lock); 331 332 return data; 333 } 334 335 /* 336 * Trip points in the lookup table should be in ascending order for both 337 * temperatures and PWM output values. 338 */ 339 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) 340 { 341 int i; 342 343 mutex_lock(&data->update_lock); 344 lm63_update_lut(data); 345 346 for (i = 1; i < data->lut_size; i++) { 347 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 348 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 349 dev_warn(dev, 350 "Lookup table doesn't look sane (check entries %d and %d)\n", 351 i, i + 1); 352 break; 353 } 354 } 355 mutex_unlock(&data->update_lock); 356 357 return i == data->lut_size ? 0 : 1; 358 } 359 360 /* 361 * Sysfs callback functions and files 362 */ 363 364 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 365 char *buf) 366 { 367 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 368 struct lm63_data *data = lm63_update_device(dev); 369 int fan; 370 371 mutex_lock(&data->update_lock); 372 fan = FAN_FROM_REG(data->fan[attr->index]); 373 mutex_unlock(&data->update_lock); 374 375 return sprintf(buf, "%d\n", fan); 376 } 377 378 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 379 const char *buf, size_t count) 380 { 381 struct lm63_data *data = dev_get_drvdata(dev); 382 struct i2c_client *client = data->client; 383 unsigned long val; 384 int err; 385 386 err = kstrtoul(buf, 10, &val); 387 if (err) 388 return err; 389 390 mutex_lock(&data->update_lock); 391 data->fan[1] = FAN_TO_REG(val); 392 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 393 data->fan[1] & 0xFF); 394 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 395 data->fan[1] >> 8); 396 mutex_unlock(&data->update_lock); 397 return count; 398 } 399 400 static int lm63_pwm_from_reg(struct lm63_data *data, u8 reg) 401 { 402 if (data->pwm_highres) 403 return reg; 404 405 return reg >= 2 * data->pwm1_freq ? 406 LM63_MAX_PWM : 407 (reg * LM63_MAX_PWM + data->pwm1_freq) / (2 * data->pwm1_freq); 408 } 409 410 static u8 lm63_pwm_to_reg(struct lm63_data *data, unsigned long val) 411 { 412 val = clamp_val(val, 0, LM63_MAX_PWM); 413 414 if (data->pwm_highres) 415 return val; 416 417 return (val * data->pwm1_freq * 2 + LM63_MAX_PWM / 2) / LM63_MAX_PWM; 418 } 419 420 static void lm63_update_pwm_highres(struct lm63_data *data, 421 int config_enhanced) 422 { 423 data->pwm_highres = !(data->config_fan & 0x08) && 424 data->pwm1_freq == 8 && 425 (config_enhanced & 0x10); 426 } 427 428 static int lm63_write_pwm(struct lm63_data *data, int nr, unsigned long val) 429 { 430 struct i2c_client *client = data->client; 431 u8 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 432 u8 regval = lm63_pwm_to_reg(data, val); 433 int ret; 434 435 ret = i2c_smbus_write_byte_data(client, reg, regval); 436 if (ret) 437 return ret; 438 data->pwm1[nr] = regval; 439 440 return 0; 441 } 442 443 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 444 char *buf) 445 { 446 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 447 struct lm63_data *data = lm63_update_device(dev); 448 int nr = attr->index; 449 int pwm; 450 451 mutex_lock(&data->update_lock); 452 pwm = lm63_pwm_from_reg(data, data->pwm1[nr]); 453 mutex_unlock(&data->update_lock); 454 455 return sprintf(buf, "%d\n", pwm); 456 } 457 458 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 459 const char *buf, size_t count) 460 { 461 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 462 struct lm63_data *data = dev_get_drvdata(dev); 463 int nr = attr->index; 464 unsigned long val; 465 int err; 466 467 if (!(data->config_fan & 0x20)) /* register is read-only */ 468 return -EPERM; 469 470 err = kstrtoul(buf, 10, &val); 471 if (err) 472 return err; 473 474 mutex_lock(&data->update_lock); 475 err = lm63_write_pwm(data, nr, val); 476 mutex_unlock(&data->update_lock); 477 478 return err ? err : count; 479 } 480 481 static ssize_t pwm1_enable_show(struct device *dev, 482 struct device_attribute *dummy, char *buf) 483 { 484 struct lm63_data *data = lm63_update_device(dev); 485 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 486 } 487 488 static ssize_t pwm1_enable_store(struct device *dev, 489 struct device_attribute *dummy, 490 const char *buf, size_t count) 491 { 492 struct lm63_data *data = dev_get_drvdata(dev); 493 struct i2c_client *client = data->client; 494 unsigned long val; 495 int err; 496 497 err = kstrtoul(buf, 10, &val); 498 if (err) 499 return err; 500 if (val < 1 || val > 2) 501 return -EINVAL; 502 503 /* 504 * Only let the user switch to automatic mode if the lookup table 505 * looks sane. 506 */ 507 if (val == 2 && lm63_lut_looks_bad(dev, data)) 508 return -EPERM; 509 510 mutex_lock(&data->update_lock); 511 data->config_fan = i2c_smbus_read_byte_data(client, 512 LM63_REG_CONFIG_FAN); 513 if (val == 1) 514 data->config_fan |= 0x20; 515 else 516 data->config_fan &= ~0x20; 517 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 518 data->config_fan); 519 mutex_unlock(&data->update_lock); 520 return count; 521 } 522 523 static ssize_t pwm1_freq_show(struct device *dev, 524 struct device_attribute *dummy, char *buf) 525 { 526 struct lm63_data *data = lm63_update_device(dev); 527 unsigned int base, freq; 528 529 mutex_lock(&data->update_lock); 530 base = (data->config_fan & 0x08) ? 531 LM63_PWM_BASE_SLOW_HZ : LM63_PWM_BASE_FAST_HZ; 532 freq = data->pwm1_freq; 533 mutex_unlock(&data->update_lock); 534 535 return sprintf(buf, "%u\n", base / freq); 536 } 537 538 /* 539 * Pick the closest CONFIG_FAN.SCS + PFR for the requested frequency. 540 * PWM_FREQ writes need the LUT unlocked, same as set_pwm1(). LUT PWM 541 * bytes are register-relative; rewrite them after a frequency change 542 * if duty cycles must be preserved. 543 */ 544 static ssize_t pwm1_freq_store(struct device *dev, 545 struct device_attribute *dummy, 546 const char *buf, size_t count) 547 { 548 struct lm63_data *data = dev_get_drvdata(dev); 549 struct i2c_client *client = data->client; 550 unsigned long val, pfr_fast, pfr_slow, err_fast, err_slow, pfr; 551 u8 config_fan; 552 bool slow_clock; 553 int config_enhanced = 0; 554 int ret; 555 556 ret = kstrtoul(buf, 10, &val); 557 if (ret) 558 return ret; 559 if (val == 0) 560 return -EINVAL; 561 562 pfr_fast = clamp_val(DIV_ROUND_CLOSEST((unsigned long)LM63_PWM_BASE_FAST_HZ, val), 563 1UL, 31UL); 564 pfr_slow = clamp_val(DIV_ROUND_CLOSEST((unsigned long)LM63_PWM_BASE_SLOW_HZ, val), 565 1UL, 31UL); 566 err_fast = abs_diff(LM63_PWM_BASE_FAST_HZ / pfr_fast, val); 567 err_slow = abs_diff(LM63_PWM_BASE_SLOW_HZ / pfr_slow, val); 568 569 if (err_slow < err_fast) { 570 slow_clock = true; 571 pfr = pfr_slow; 572 } else { 573 slow_clock = false; 574 pfr = pfr_fast; 575 } 576 577 mutex_lock(&data->update_lock); 578 ret = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG_FAN); 579 if (ret < 0) 580 goto unlock; 581 config_fan = ret; 582 data->config_fan = config_fan; 583 584 if (!(config_fan & 0x20)) { /* register is read-only */ 585 ret = -EPERM; 586 goto unlock; 587 } 588 589 if (data->kind == lm96163 || data->kind == ctf2301) { 590 ret = i2c_smbus_read_byte_data(client, 591 LM96163_REG_CONFIG_ENHANCED); 592 if (ret < 0) 593 goto unlock; 594 config_enhanced = ret; 595 lm63_update_pwm_highres(data, config_enhanced); 596 597 if (data->kind == ctf2301) { 598 if (!slow_clock && pfr == 8) 599 config_enhanced |= 0x10; 600 else 601 config_enhanced &= ~0x10; 602 ret = i2c_smbus_write_byte_data(client, 603 LM96163_REG_CONFIG_ENHANCED, 604 config_enhanced); 605 if (ret) 606 goto unlock; 607 lm63_update_pwm_highres(data, config_enhanced); 608 } 609 } 610 611 if (slow_clock) 612 config_fan |= 0x08; 613 else 614 config_fan &= ~0x08; 615 ret = i2c_smbus_write_byte_data(client, LM63_REG_PWM_FREQ, pfr); 616 if (ret) 617 goto unlock; 618 data->pwm1_freq = pfr; 619 lm63_update_pwm_highres(data, config_enhanced); 620 ret = i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 621 config_fan); 622 if (ret) 623 goto unlock; 624 625 data->config_fan = config_fan; 626 lm63_update_pwm_highres(data, config_enhanced); 627 unlock: 628 mutex_unlock(&data->update_lock); 629 630 return ret ? ret : count; 631 } 632 633 /* 634 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 635 * For remote sensor registers temp2_offset has to be considered, 636 * for local sensor it must not. 637 * So we need separate 8bit accessors for local and remote sensor. 638 */ 639 static ssize_t show_local_temp8(struct device *dev, 640 struct device_attribute *devattr, 641 char *buf) 642 { 643 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 644 struct lm63_data *data = lm63_update_device(dev); 645 int temp; 646 647 mutex_lock(&data->update_lock); 648 if (data->kind == ctf2301) 649 temp = TEMP12_FROM_REG(attr->index ? data->temp1_max : 650 data->temp1_input); 651 else 652 temp = TEMP8_FROM_REG(data->temp8[attr->index]); 653 mutex_unlock(&data->update_lock); 654 655 return sprintf(buf, "%d\n", temp); 656 } 657 658 static ssize_t show_remote_temp8(struct device *dev, 659 struct device_attribute *devattr, 660 char *buf) 661 { 662 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 663 struct lm63_data *data = lm63_update_device(dev); 664 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 665 + data->temp2_offset); 666 } 667 668 static ssize_t show_lut_temp(struct device *dev, 669 struct device_attribute *devattr, 670 char *buf) 671 { 672 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 673 struct lm63_data *data = lm63_update_device(dev); 674 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 675 + data->temp2_offset); 676 } 677 678 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 679 const char *buf, size_t count) 680 { 681 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 682 struct lm63_data *data = dev_get_drvdata(dev); 683 struct i2c_client *client = data->client; 684 int nr = attr->index; 685 long val; 686 int err; 687 int temp; 688 u8 reg; 689 690 err = kstrtol(buf, 10, &val); 691 if (err) 692 return err; 693 694 mutex_lock(&data->update_lock); 695 if (data->kind == ctf2301 && nr == 1) { 696 temp = TEMP12_TO_REG(val); 697 err = i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, 698 temp >> 8); 699 if (!err) 700 err = i2c_smbus_write_byte_data(client, 701 CTF2301_REG_LOCAL_HIGH_LSB, 702 temp & 0xf0); 703 if (!err) 704 data->temp1_max = temp; 705 mutex_unlock(&data->update_lock); 706 707 return err ? err : count; 708 } 709 710 switch (nr) { 711 case 2: 712 reg = LM63_REG_REMOTE_TCRIT; 713 if (data->remote_unsigned) 714 temp = TEMP8U_TO_REG(val - data->temp2_offset); 715 else 716 temp = TEMP8_TO_REG(val - data->temp2_offset); 717 break; 718 case 1: 719 reg = LM63_REG_LOCAL_HIGH; 720 temp = TEMP8_TO_REG(val); 721 break; 722 default: /* lookup table */ 723 reg = LM63_REG_LUT_TEMP(nr - 3); 724 temp = lut_temp_to_reg(data, val); 725 } 726 err = i2c_smbus_write_byte_data(client, reg, temp); 727 if (!err) 728 data->temp8[nr] = temp; 729 mutex_unlock(&data->update_lock); 730 731 return err ? err : count; 732 } 733 734 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 735 char *buf) 736 { 737 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 738 struct lm63_data *data = lm63_update_device(dev); 739 int nr = attr->index; 740 int temp; 741 742 mutex_lock(&data->update_lock); 743 if (!nr) { 744 /* 745 * Use unsigned temperature unless its value is zero. 746 * If it is zero, use signed temperature. 747 */ 748 if (data->temp11u) 749 temp = TEMP11_FROM_REG(data->temp11u); 750 else 751 temp = TEMP11_FROM_REG(data->temp11[nr]); 752 } else { 753 if (data->remote_unsigned && nr == 2) 754 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 755 else 756 temp = TEMP11_FROM_REG(data->temp11[nr]); 757 } 758 temp += data->temp2_offset; 759 mutex_unlock(&data->update_lock); 760 761 return sprintf(buf, "%d\n", temp); 762 } 763 764 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 765 const char *buf, size_t count) 766 { 767 static const u8 reg[6] = { 768 LM63_REG_REMOTE_LOW_MSB, 769 LM63_REG_REMOTE_LOW_LSB, 770 LM63_REG_REMOTE_HIGH_MSB, 771 LM63_REG_REMOTE_HIGH_LSB, 772 LM63_REG_REMOTE_OFFSET_MSB, 773 LM63_REG_REMOTE_OFFSET_LSB, 774 }; 775 776 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 777 struct lm63_data *data = dev_get_drvdata(dev); 778 struct i2c_client *client = data->client; 779 long val; 780 int err; 781 int nr = attr->index; 782 783 err = kstrtol(buf, 10, &val); 784 if (err) 785 return err; 786 787 mutex_lock(&data->update_lock); 788 if (data->remote_unsigned && nr == 2) 789 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 790 else 791 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 792 793 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 794 data->temp11[nr] >> 8); 795 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 796 data->temp11[nr] & 0xff); 797 mutex_unlock(&data->update_lock); 798 return count; 799 } 800 801 /* 802 * Hysteresis register holds a relative value, while we want to present 803 * an absolute to user-space 804 */ 805 static ssize_t temp2_crit_hyst_show(struct device *dev, 806 struct device_attribute *dummy, char *buf) 807 { 808 struct lm63_data *data = lm63_update_device(dev); 809 int temp; 810 811 mutex_lock(&data->update_lock); 812 temp = temp8_from_reg(data, 2) + data->temp2_offset 813 - TEMP8_FROM_REG(data->temp2_crit_hyst); 814 mutex_unlock(&data->update_lock); 815 816 return sprintf(buf, "%d\n", temp); 817 } 818 819 static ssize_t show_lut_temp_hyst(struct device *dev, 820 struct device_attribute *devattr, char *buf) 821 { 822 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 823 struct lm63_data *data = lm63_update_device(dev); 824 int temp; 825 826 mutex_lock(&data->update_lock); 827 temp = lut_temp_from_reg(data, attr->index) + data->temp2_offset 828 - TEMP8_FROM_REG(data->lut_temp_hyst); 829 mutex_unlock(&data->update_lock); 830 831 return sprintf(buf, "%d\n", temp); 832 } 833 834 /* 835 * The LM63 has a single hysteresis register shared by all LUT entries. 836 * Expose it as a chip-wide hysteresis amount in millidegrees; the 837 * per-point pwm1_auto_pointN_temp_hyst attributes remain read-only and 838 * show the resulting absolute trip-down temperature for each entry. 839 */ 840 static ssize_t pwm1_auto_point_temp_hyst_show(struct device *dev, 841 struct device_attribute *dummy, 842 char *buf) 843 { 844 struct lm63_data *data = lm63_update_device(dev); 845 u8 hyst; 846 847 mutex_lock(&data->update_lock); 848 hyst = data->lut_temp_hyst; 849 mutex_unlock(&data->update_lock); 850 851 return sprintf(buf, "%d\n", TEMP8_FROM_REG(hyst)); 852 } 853 854 static ssize_t pwm1_auto_point_temp_hyst_store(struct device *dev, 855 struct device_attribute *dummy, 856 const char *buf, size_t count) 857 { 858 struct lm63_data *data = dev_get_drvdata(dev); 859 struct i2c_client *client = data->client; 860 unsigned long val; 861 int err; 862 863 err = kstrtoul(buf, 10, &val); 864 if (err) 865 return err; 866 867 mutex_lock(&data->update_lock); 868 data->lut_temp_hyst = HYST_TO_REG(val); 869 i2c_smbus_write_byte_data(client, LM63_REG_LUT_TEMP_HYST, 870 data->lut_temp_hyst); 871 mutex_unlock(&data->update_lock); 872 return count; 873 } 874 875 /* 876 * And now the other way around, user-space provides an absolute 877 * hysteresis value and we have to store a relative one 878 */ 879 static ssize_t temp2_crit_hyst_store(struct device *dev, 880 struct device_attribute *dummy, 881 const char *buf, size_t count) 882 { 883 struct lm63_data *data = lm63_update_device(dev); 884 struct i2c_client *client = data->client; 885 long val; 886 int err; 887 long hyst; 888 889 err = kstrtol(buf, 10, &val); 890 if (err) 891 return err; 892 893 mutex_lock(&data->update_lock); 894 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 895 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 896 HYST_TO_REG(hyst)); 897 mutex_unlock(&data->update_lock); 898 return count; 899 } 900 901 /* 902 * Set conversion rate. 903 * client->update_lock must be held when calling this function. 904 */ 905 static unsigned int lm63_update_interval(struct lm63_data *data, u8 rate) 906 { 907 if (data->kind == ctf2301) 908 return ctf2301_update_intervals[min_t(unsigned int, rate, 909 ARRAY_SIZE(ctf2301_update_intervals) - 1)]; 910 911 return UPDATE_INTERVAL(data->max_convrate_hz, rate); 912 } 913 914 static int lm63_set_convrate(struct lm63_data *data, unsigned int interval) 915 { 916 struct i2c_client *client = data->client; 917 unsigned int update_interval, error, best_error = ~0U; 918 unsigned int best = 0; 919 unsigned int i; 920 int ret; 921 922 if (data->kind == ctf2301) { 923 for (i = 0; i < ARRAY_SIZE(ctf2301_update_intervals); i++) { 924 error = abs_diff(interval, ctf2301_update_intervals[i]); 925 if (error < best_error) { 926 best_error = error; 927 best = i; 928 } 929 } 930 931 ret = i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, 932 best); 933 if (ret) 934 return ret; 935 data->update_interval = ctf2301_update_intervals[best]; 936 937 return 0; 938 } 939 940 /* Shift calculations to avoid rounding errors */ 941 interval <<= 6; 942 943 /* find the nearest update rate */ 944 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 945 / data->max_convrate_hz; 946 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 947 if (interval >= update_interval * 3 / 4) 948 break; 949 950 ret = i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 951 if (ret) 952 return ret; 953 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 954 955 return 0; 956 } 957 958 static ssize_t update_interval_show(struct device *dev, 959 struct device_attribute *attr, char *buf) 960 { 961 struct lm63_data *data = dev_get_drvdata(dev); 962 963 return sprintf(buf, "%u\n", data->update_interval); 964 } 965 966 static ssize_t update_interval_store(struct device *dev, 967 struct device_attribute *attr, 968 const char *buf, size_t count) 969 { 970 struct lm63_data *data = dev_get_drvdata(dev); 971 unsigned long val; 972 int err; 973 974 err = kstrtoul(buf, 10, &val); 975 if (err) 976 return err; 977 978 mutex_lock(&data->update_lock); 979 err = lm63_set_convrate(data, clamp_val(val, 0, 100000)); 980 mutex_unlock(&data->update_lock); 981 982 return err ? err : count; 983 } 984 985 static ssize_t temp2_type_show(struct device *dev, 986 struct device_attribute *attr, char *buf) 987 { 988 struct lm63_data *data = dev_get_drvdata(dev); 989 990 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 991 } 992 993 static ssize_t temp2_type_store(struct device *dev, 994 struct device_attribute *attr, 995 const char *buf, size_t count) 996 { 997 struct lm63_data *data = dev_get_drvdata(dev); 998 struct i2c_client *client = data->client; 999 unsigned long val; 1000 int ret; 1001 u8 reg; 1002 1003 ret = kstrtoul(buf, 10, &val); 1004 if (ret < 0) 1005 return ret; 1006 if (val != 1 && val != 2) 1007 return -EINVAL; 1008 1009 mutex_lock(&data->update_lock); 1010 data->trutherm = val == 1; 1011 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 1012 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 1013 reg | (data->trutherm ? 0x02 : 0x00)); 1014 data->valid = false; 1015 mutex_unlock(&data->update_lock); 1016 1017 return count; 1018 } 1019 1020 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, 1021 char *buf) 1022 { 1023 struct lm63_data *data = lm63_update_device(dev); 1024 return sprintf(buf, "%u\n", data->alarms); 1025 } 1026 1027 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 1028 char *buf) 1029 { 1030 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 1031 struct lm63_data *data = lm63_update_device(dev); 1032 int bitnr = attr->index; 1033 1034 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 1035 } 1036 1037 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 1038 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 1039 set_fan, 1); 1040 1041 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 1042 static DEVICE_ATTR_RW(pwm1_enable); 1043 static DEVICE_ATTR_RW(pwm1_freq); 1044 static DEVICE_ATTR_RW(pwm1_auto_point_temp_hyst); 1045 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 1046 show_pwm1, set_pwm1, 1); 1047 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 1048 show_lut_temp, set_temp8, 3); 1049 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 1050 show_lut_temp_hyst, NULL, 3); 1051 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 1052 show_pwm1, set_pwm1, 2); 1053 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 1054 show_lut_temp, set_temp8, 4); 1055 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 1056 show_lut_temp_hyst, NULL, 4); 1057 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 1058 show_pwm1, set_pwm1, 3); 1059 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 1060 show_lut_temp, set_temp8, 5); 1061 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 1062 show_lut_temp_hyst, NULL, 5); 1063 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 1064 show_pwm1, set_pwm1, 4); 1065 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 1066 show_lut_temp, set_temp8, 6); 1067 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 1068 show_lut_temp_hyst, NULL, 6); 1069 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 1070 show_pwm1, set_pwm1, 5); 1071 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 1072 show_lut_temp, set_temp8, 7); 1073 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 1074 show_lut_temp_hyst, NULL, 7); 1075 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 1076 show_pwm1, set_pwm1, 6); 1077 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 1078 show_lut_temp, set_temp8, 8); 1079 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 1080 show_lut_temp_hyst, NULL, 8); 1081 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 1082 show_pwm1, set_pwm1, 7); 1083 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 1084 show_lut_temp, set_temp8, 9); 1085 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 1086 show_lut_temp_hyst, NULL, 9); 1087 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 1088 show_pwm1, set_pwm1, 8); 1089 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 1090 show_lut_temp, set_temp8, 10); 1091 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 1092 show_lut_temp_hyst, NULL, 10); 1093 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 1094 show_pwm1, set_pwm1, 9); 1095 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 1096 show_lut_temp, set_temp8, 11); 1097 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 1098 show_lut_temp_hyst, NULL, 11); 1099 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 1100 show_pwm1, set_pwm1, 10); 1101 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 1102 show_lut_temp, set_temp8, 12); 1103 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 1104 show_lut_temp_hyst, NULL, 12); 1105 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 1106 show_pwm1, set_pwm1, 11); 1107 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 1108 show_lut_temp, set_temp8, 13); 1109 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 1110 show_lut_temp_hyst, NULL, 13); 1111 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 1112 show_pwm1, set_pwm1, 12); 1113 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 1114 show_lut_temp, set_temp8, 14); 1115 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 1116 show_lut_temp_hyst, NULL, 14); 1117 1118 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 1119 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 1120 set_temp8, 1); 1121 1122 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 1123 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 1124 set_temp11, 1); 1125 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 1126 set_temp11, 2); 1127 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 1128 set_temp11, 3); 1129 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 1130 set_temp8, 2); 1131 static DEVICE_ATTR_RW(temp2_crit_hyst); 1132 1133 static DEVICE_ATTR_RW(temp2_type); 1134 1135 /* Individual alarm files */ 1136 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 1137 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 1138 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 1139 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 1140 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 1141 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 1142 /* Raw alarm file for compatibility */ 1143 static DEVICE_ATTR_RO(alarms); 1144 1145 static DEVICE_ATTR_RW(update_interval); 1146 1147 static int lm63_get_max_state(struct thermal_cooling_device *cdev, 1148 unsigned long *state) 1149 { 1150 *state = LM63_MAX_PWM; 1151 1152 return 0; 1153 } 1154 1155 static int lm63_get_cur_state(struct thermal_cooling_device *cdev, 1156 unsigned long *state) 1157 { 1158 struct lm63_data *data = cdev->devdata; 1159 int ret; 1160 1161 mutex_lock(&data->update_lock); 1162 ret = i2c_smbus_read_byte_data(data->client, LM63_REG_PWM_VALUE); 1163 if (ret < 0) 1164 goto unlock; 1165 1166 data->pwm1[0] = ret; 1167 *state = lm63_pwm_from_reg(data, data->pwm1[0]); 1168 unlock: 1169 mutex_unlock(&data->update_lock); 1170 1171 return ret < 0 ? ret : 0; 1172 } 1173 1174 static int lm63_set_cur_state(struct thermal_cooling_device *cdev, 1175 unsigned long state) 1176 { 1177 struct lm63_data *data = cdev->devdata; 1178 int config_fan; 1179 int ret; 1180 1181 if (state > LM63_MAX_PWM) 1182 return -EINVAL; 1183 1184 mutex_lock(&data->update_lock); 1185 config_fan = i2c_smbus_read_byte_data(data->client, 1186 LM63_REG_CONFIG_FAN); 1187 if (config_fan < 0) { 1188 ret = config_fan; 1189 goto unlock; 1190 } 1191 data->config_fan = config_fan; 1192 1193 if (!(config_fan & 0x20)) { 1194 config_fan |= 0x20; 1195 ret = i2c_smbus_write_byte_data(data->client, 1196 LM63_REG_CONFIG_FAN, 1197 config_fan); 1198 if (ret) 1199 goto unlock; 1200 data->config_fan = config_fan; 1201 } 1202 1203 ret = lm63_write_pwm(data, 0, state); 1204 unlock: 1205 mutex_unlock(&data->update_lock); 1206 1207 return ret; 1208 } 1209 1210 static const struct thermal_cooling_device_ops lm63_cooling_ops = { 1211 .get_max_state = lm63_get_max_state, 1212 .get_cur_state = lm63_get_cur_state, 1213 .set_cur_state = lm63_set_cur_state, 1214 }; 1215 1216 static struct attribute *lm63_attributes[] = { 1217 &sensor_dev_attr_pwm1.dev_attr.attr, 1218 &dev_attr_pwm1_enable.attr, 1219 &dev_attr_pwm1_freq.attr, 1220 &dev_attr_pwm1_auto_point_temp_hyst.attr, 1221 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1222 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1223 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1224 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1225 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1226 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 1227 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1228 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1229 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 1230 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1231 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1232 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 1233 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 1234 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 1235 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 1236 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 1237 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 1238 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 1239 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 1240 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 1241 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 1242 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 1243 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 1244 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 1245 1246 &sensor_dev_attr_temp1_input.dev_attr.attr, 1247 &sensor_dev_attr_temp2_input.dev_attr.attr, 1248 &sensor_dev_attr_temp2_min.dev_attr.attr, 1249 &sensor_dev_attr_temp1_max.dev_attr.attr, 1250 &sensor_dev_attr_temp2_max.dev_attr.attr, 1251 &sensor_dev_attr_temp2_offset.dev_attr.attr, 1252 &sensor_dev_attr_temp2_crit.dev_attr.attr, 1253 &dev_attr_temp2_crit_hyst.attr, 1254 1255 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 1256 &sensor_dev_attr_temp2_fault.dev_attr.attr, 1257 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 1258 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 1259 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 1260 &dev_attr_alarms.attr, 1261 &dev_attr_update_interval.attr, 1262 NULL 1263 }; 1264 1265 static struct attribute *lm63_attributes_temp2_type[] = { 1266 &dev_attr_temp2_type.attr, 1267 NULL 1268 }; 1269 1270 static const struct attribute_group lm63_group_temp2_type = { 1271 .attrs = lm63_attributes_temp2_type, 1272 }; 1273 1274 static struct attribute *lm63_attributes_extra_lut[] = { 1275 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 1276 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 1277 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 1278 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 1279 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 1280 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 1281 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 1282 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 1283 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 1284 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 1285 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 1286 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 1287 NULL 1288 }; 1289 1290 static const struct attribute_group lm63_group_extra_lut = { 1291 .attrs = lm63_attributes_extra_lut, 1292 }; 1293 1294 /* 1295 * On LM63, temp2_crit can be set only once, which should be job 1296 * of the bootloader. 1297 * On LM64, temp2_crit can always be set. 1298 * On LM96163 and CTF2301, temp2_crit can be set if bit 1 of the 1299 * configuration register is true. 1300 */ 1301 static umode_t lm63_attribute_mode(struct kobject *kobj, 1302 struct attribute *attr, int index) 1303 { 1304 struct device *dev = kobj_to_dev(kobj); 1305 struct lm63_data *data = dev_get_drvdata(dev); 1306 1307 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 1308 && (data->kind == lm64 || 1309 ((data->kind == lm96163 || data->kind == ctf2301) && 1310 (data->config & 0x02)))) 1311 return attr->mode | S_IWUSR; 1312 1313 return attr->mode; 1314 } 1315 1316 static const struct attribute_group lm63_group = { 1317 .is_visible = lm63_attribute_mode, 1318 .attrs = lm63_attributes, 1319 }; 1320 1321 static struct attribute *lm63_attributes_fan1[] = { 1322 &sensor_dev_attr_fan1_input.dev_attr.attr, 1323 &sensor_dev_attr_fan1_min.dev_attr.attr, 1324 1325 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 1326 NULL 1327 }; 1328 1329 static const struct attribute_group lm63_group_fan1 = { 1330 .attrs = lm63_attributes_fan1, 1331 }; 1332 1333 /* 1334 * Real code 1335 */ 1336 1337 /* Return 0 if detection is successful, -ENODEV otherwise */ 1338 static int lm63_detect(struct i2c_client *client, 1339 struct i2c_board_info *info) 1340 { 1341 struct i2c_adapter *adapter = client->adapter; 1342 u8 man_id, chip_id, reg_config1, reg_config2; 1343 u8 reg_alert_status, reg_alert_mask; 1344 int address = client->addr; 1345 1346 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1347 return -ENODEV; 1348 1349 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 1350 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 1351 1352 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1353 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 1354 reg_alert_status = i2c_smbus_read_byte_data(client, 1355 LM63_REG_ALERT_STATUS); 1356 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1357 1358 if (man_id != 0x01 /* National Semiconductor */ 1359 || (reg_config1 & 0x18) != 0x00 1360 || (reg_config2 & 0xF8) != 0x00 1361 || (reg_alert_status & 0x20) != 0x00 1362 || (reg_alert_mask & 0xA4) != 0xA4) { 1363 dev_dbg(&adapter->dev, 1364 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1365 man_id, chip_id); 1366 return -ENODEV; 1367 } 1368 1369 if (chip_id == 0x41 && address == 0x4c) 1370 strscpy(info->type, "lm63", I2C_NAME_SIZE); 1371 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1372 strscpy(info->type, "lm64", I2C_NAME_SIZE); 1373 else if (chip_id == 0x49 && address == 0x4c) 1374 strscpy(info->type, "lm96163", I2C_NAME_SIZE); 1375 else 1376 return -ENODEV; 1377 1378 return 0; 1379 } 1380 1381 /* 1382 * Ideally we shouldn't have to initialize anything, since the BIOS 1383 * should have taken care of everything 1384 */ 1385 static int lm63_init_client(struct lm63_data *data) 1386 { 1387 struct i2c_client *client = data->client; 1388 struct device *dev = &client->dev; 1389 u8 convrate; 1390 int ret; 1391 1392 ret = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1393 if (ret < 0) 1394 return ret; 1395 data->config = ret; 1396 ret = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG_FAN); 1397 if (ret < 0) 1398 return ret; 1399 data->config_fan = ret; 1400 1401 /* Start converting if needed */ 1402 if (data->config & 0x40) { /* standby */ 1403 dev_dbg(dev, "Switching to operational mode\n"); 1404 data->config &= 0xA7; 1405 ret = i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1406 data->config); 1407 if (ret) 1408 return ret; 1409 } 1410 /* Tachometer is always enabled on LM64 */ 1411 if (data->kind == lm64) 1412 data->config |= 0x04; 1413 if (data->kind == ctf2301 && !client->irq && !(data->config & 0x04)) { 1414 dev_dbg(dev, "Configuring ALERT/TACH pin for tachometer input\n"); 1415 data->config |= 0x04; 1416 ret = i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1417 data->config); 1418 if (ret) 1419 return ret; 1420 } 1421 1422 /* We may need pwm1_freq before ever updating the client data */ 1423 ret = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1424 if (ret < 0) 1425 return ret; 1426 data->pwm1_freq = ret & 0x1f; 1427 if (data->pwm1_freq == 0) 1428 data->pwm1_freq = 1; 1429 1430 switch (data->kind) { 1431 case lm63: 1432 case lm64: 1433 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1434 data->lut_size = 8; 1435 break; 1436 case lm96163: 1437 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1438 data->lut_size = 12; 1439 ret = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM); 1440 if (ret < 0) 1441 return ret; 1442 data->trutherm = ret & 0x02; 1443 break; 1444 case ctf2301: 1445 data->lut_size = 12; 1446 break; 1447 } 1448 ret = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1449 if (ret < 0) 1450 return ret; 1451 convrate = ret; 1452 if (data->kind == ctf2301 && 1453 convrate >= ARRAY_SIZE(ctf2301_update_intervals)) 1454 convrate = ARRAY_SIZE(ctf2301_update_intervals) - 1; 1455 else if (unlikely(convrate > LM63_MAX_CONVRATE)) 1456 convrate = LM63_MAX_CONVRATE; 1457 data->update_interval = lm63_update_interval(data, convrate); 1458 1459 /* 1460 * For LM96163 and CTF2301, check if high resolution PWM 1461 * and unsigned temperature format is enabled. 1462 */ 1463 if (data->kind == lm96163 || data->kind == ctf2301) { 1464 u8 config_enhanced; 1465 1466 ret = i2c_smbus_read_byte_data(client, 1467 LM96163_REG_CONFIG_ENHANCED); 1468 if (ret < 0) 1469 return ret; 1470 config_enhanced = ret; 1471 if (config_enhanced & 0x20) 1472 data->lut_temp_highres = true; 1473 if ((config_enhanced & 0x10) 1474 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1475 data->pwm_highres = true; 1476 if (config_enhanced & 0x08) 1477 data->remote_unsigned = true; 1478 } 1479 1480 /* Show some debug info about the LM63 configuration */ 1481 if (data->kind == lm63) 1482 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1483 (data->config & 0x04) ? "tachometer input" : 1484 "alert output"); 1485 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1486 (data->config_fan & 0x08) ? "1.4" : "360", 1487 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1488 dev_dbg(dev, "PWM output active %s, %s mode\n", 1489 (data->config_fan & 0x10) ? "low" : "high", 1490 (data->config_fan & 0x20) ? "manual" : "auto"); 1491 1492 return 0; 1493 } 1494 1495 static const struct i2c_device_id lm63_id[]; 1496 1497 static int lm63_probe(struct i2c_client *client) 1498 { 1499 struct device *dev = &client->dev; 1500 struct thermal_cooling_device *cdev; 1501 struct device *hwmon_dev; 1502 struct lm63_data *data; 1503 int groups = 0; 1504 int ret; 1505 1506 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1507 if (!data) 1508 return -ENOMEM; 1509 1510 data->client = client; 1511 mutex_init(&data->update_lock); 1512 1513 /* Set the device type */ 1514 data->kind = (uintptr_t)i2c_get_match_data(client); 1515 if (data->kind == lm64) 1516 data->temp2_offset = 16000; 1517 1518 /* Initialize chip */ 1519 ret = lm63_init_client(data); 1520 if (ret) 1521 return dev_err_probe(dev, ret, "failed to initialize device\n"); 1522 1523 /* Register sysfs hooks */ 1524 data->groups[groups++] = &lm63_group; 1525 if (data->config & 0x04) /* tachometer enabled */ 1526 data->groups[groups++] = &lm63_group_fan1; 1527 1528 if (data->kind == lm96163) { 1529 data->groups[groups++] = &lm63_group_temp2_type; 1530 data->groups[groups++] = &lm63_group_extra_lut; 1531 } else if (data->kind == ctf2301) { 1532 data->groups[groups++] = &lm63_group_extra_lut; 1533 } 1534 1535 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1536 data, data->groups); 1537 if (IS_ERR(hwmon_dev)) 1538 return PTR_ERR(hwmon_dev); 1539 1540 if (IS_ENABLED(CONFIG_THERMAL_OF) && 1541 of_property_present(dev->of_node, "#cooling-cells")) { 1542 cdev = devm_thermal_of_cooling_device_register(dev, 0, 1543 client->name, 1544 data, 1545 &lm63_cooling_ops); 1546 if (IS_ERR(cdev)) 1547 return PTR_ERR(cdev); 1548 } 1549 1550 return 0; 1551 } 1552 1553 /* 1554 * Driver data (common to all clients) 1555 */ 1556 1557 static const struct i2c_device_id lm63_id[] = { 1558 { .name = "lm63", .driver_data = lm63 }, 1559 { .name = "lm64", .driver_data = lm64 }, 1560 { .name = "lm96163", .driver_data = lm96163 }, 1561 { .name = "ctf2301", .driver_data = ctf2301 }, 1562 { } 1563 }; 1564 MODULE_DEVICE_TABLE(i2c, lm63_id); 1565 1566 static const struct of_device_id __maybe_unused lm63_of_match[] = { 1567 { 1568 .compatible = "national,lm63", 1569 .data = (void *)lm63 1570 }, 1571 { 1572 .compatible = "national,lm64", 1573 .data = (void *)lm64 1574 }, 1575 { 1576 .compatible = "national,lm96163", 1577 .data = (void *)lm96163 1578 }, 1579 { 1580 .compatible = "sensylink,ctf2301", 1581 .data = (void *)ctf2301 1582 }, 1583 { }, 1584 }; 1585 MODULE_DEVICE_TABLE(of, lm63_of_match); 1586 1587 static struct i2c_driver lm63_driver = { 1588 .class = I2C_CLASS_HWMON, 1589 .driver = { 1590 .name = "lm63", 1591 .of_match_table = of_match_ptr(lm63_of_match), 1592 }, 1593 .probe = lm63_probe, 1594 .id_table = lm63_id, 1595 .detect = lm63_detect, 1596 .address_list = normal_i2c, 1597 }; 1598 1599 module_i2c_driver(lm63_driver); 1600 1601 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1602 MODULE_DESCRIPTION("LM63 driver"); 1603 MODULE_LICENSE("GPL"); 1604