1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor) 4 * 5 * Copyright (C) 2008, 2010 Pengutronix 6 * 7 * TODO: SPI, use power-down mode for suspend?, interrupt handling? 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/err.h> 14 #include <linux/mutex.h> 15 #include <linux/jiffies.h> 16 #include <linux/i2c.h> 17 #include <linux/hwmon.h> 18 #include <linux/hwmon-sysfs.h> 19 #include <linux/slab.h> 20 21 #define ADT7411_REG_STAT_1 0x00 22 #define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0) 23 #define ADT7411_STAT_1_INT_TEMP_LOW BIT(1) 24 #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2) 25 #define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3) 26 #define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4) 27 #define ADT7411_STAT_1_AIN2 BIT(5) 28 #define ADT7411_STAT_1_AIN3 BIT(6) 29 #define ADT7411_STAT_1_AIN4 BIT(7) 30 #define ADT7411_REG_STAT_2 0x01 31 #define ADT7411_STAT_2_AIN5 BIT(0) 32 #define ADT7411_STAT_2_AIN6 BIT(1) 33 #define ADT7411_STAT_2_AIN7 BIT(2) 34 #define ADT7411_STAT_2_AIN8 BIT(3) 35 #define ADT7411_STAT_2_VDD BIT(4) 36 #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03 37 #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04 38 #define ADT7411_REG_VDD_MSB 0x06 39 #define ADT7411_REG_INT_TEMP_MSB 0x07 40 #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08 41 42 #define ADT7411_REG_CFG1 0x18 43 #define ADT7411_CFG1_START_MONITOR BIT(0) 44 #define ADT7411_CFG1_RESERVED_BIT1 BIT(1) 45 #define ADT7411_CFG1_EXT_TDM BIT(2) 46 #define ADT7411_CFG1_RESERVED_BIT3 BIT(3) 47 48 #define ADT7411_REG_CFG2 0x19 49 #define ADT7411_CFG2_DISABLE_AVG BIT(5) 50 51 #define ADT7411_REG_CFG3 0x1a 52 #define ADT7411_CFG3_ADC_CLK_225 BIT(0) 53 #define ADT7411_CFG3_RESERVED_BIT1 BIT(1) 54 #define ADT7411_CFG3_RESERVED_BIT2 BIT(2) 55 #define ADT7411_CFG3_RESERVED_BIT3 BIT(3) 56 #define ADT7411_CFG3_REF_VDD BIT(4) 57 58 #define ADT7411_REG_VDD_HIGH 0x23 59 #define ADT7411_REG_VDD_LOW 0x24 60 #define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr)) 61 #define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr)) 62 #define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \ 63 ? 0x2b + 2 * ((nr)-2) \ 64 : 0x27) 65 #define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \ 66 ? 0x2c + 2 * ((nr)-2) \ 67 : 0x28) 68 69 #define ADT7411_REG_DEVICE_ID 0x4d 70 #define ADT7411_REG_MANUFACTURER_ID 0x4e 71 72 #define ADT7411_DEVICE_ID 0x2 73 #define ADT7411_MANUFACTURER_ID 0x41 74 75 static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END }; 76 77 static const u8 adt7411_in_alarm_reg[] = { 78 ADT7411_REG_STAT_2, 79 ADT7411_REG_STAT_1, 80 ADT7411_REG_STAT_1, 81 ADT7411_REG_STAT_1, 82 ADT7411_REG_STAT_1, 83 ADT7411_REG_STAT_2, 84 ADT7411_REG_STAT_2, 85 ADT7411_REG_STAT_2, 86 ADT7411_REG_STAT_2, 87 }; 88 89 static const u8 adt7411_in_alarm_bits[] = { 90 ADT7411_STAT_2_VDD, 91 ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1, 92 ADT7411_STAT_1_AIN2, 93 ADT7411_STAT_1_AIN3, 94 ADT7411_STAT_1_AIN4, 95 ADT7411_STAT_2_AIN5, 96 ADT7411_STAT_2_AIN6, 97 ADT7411_STAT_2_AIN7, 98 ADT7411_STAT_2_AIN8, 99 }; 100 101 struct adt7411_data { 102 struct mutex device_lock; /* for "atomic" device accesses */ 103 struct mutex update_lock; 104 unsigned long next_update; 105 long vref_cached; 106 struct i2c_client *client; 107 bool use_ext_temp; 108 }; 109 110 /* 111 * When reading a register containing (up to 4) lsb, all associated 112 * msb-registers get locked by the hardware. After _one_ of those msb is read, 113 * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb 114 * is protected here with a mutex, too. 115 */ 116 static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg, 117 u8 msb_reg, u8 lsb_shift) 118 { 119 struct adt7411_data *data = i2c_get_clientdata(client); 120 int val, tmp; 121 122 mutex_lock(&data->device_lock); 123 124 val = i2c_smbus_read_byte_data(client, lsb_reg); 125 if (val < 0) 126 goto exit_unlock; 127 128 tmp = (val >> lsb_shift) & 3; 129 val = i2c_smbus_read_byte_data(client, msb_reg); 130 131 if (val >= 0) 132 val = (val << 2) | tmp; 133 134 exit_unlock: 135 mutex_unlock(&data->device_lock); 136 137 return val; 138 } 139 140 static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit, 141 bool flag) 142 { 143 struct adt7411_data *data = i2c_get_clientdata(client); 144 int ret, val; 145 146 mutex_lock(&data->device_lock); 147 148 ret = i2c_smbus_read_byte_data(client, reg); 149 if (ret < 0) 150 goto exit_unlock; 151 152 if (flag) 153 val = ret | bit; 154 else 155 val = ret & ~bit; 156 157 ret = i2c_smbus_write_byte_data(client, reg, val); 158 159 exit_unlock: 160 mutex_unlock(&data->device_lock); 161 return ret; 162 } 163 164 static ssize_t adt7411_show_bit(struct device *dev, 165 struct device_attribute *attr, char *buf) 166 { 167 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr); 168 struct adt7411_data *data = dev_get_drvdata(dev); 169 struct i2c_client *client = data->client; 170 int ret = i2c_smbus_read_byte_data(client, attr2->index); 171 172 return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr)); 173 } 174 175 static ssize_t adt7411_set_bit(struct device *dev, 176 struct device_attribute *attr, const char *buf, 177 size_t count) 178 { 179 struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr); 180 struct adt7411_data *data = dev_get_drvdata(dev); 181 struct i2c_client *client = data->client; 182 int ret; 183 unsigned long flag; 184 185 ret = kstrtoul(buf, 0, &flag); 186 if (ret || flag > 1) 187 return -EINVAL; 188 189 ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag); 190 191 /* force update */ 192 mutex_lock(&data->update_lock); 193 data->next_update = jiffies; 194 mutex_unlock(&data->update_lock); 195 196 return ret < 0 ? ret : count; 197 } 198 199 #define ADT7411_BIT_ATTR(__name, __reg, __bit) \ 200 SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \ 201 adt7411_set_bit, __bit, __reg) 202 203 static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG); 204 static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225); 205 static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD); 206 207 static struct attribute *adt7411_attrs[] = { 208 &sensor_dev_attr_no_average.dev_attr.attr, 209 &sensor_dev_attr_fast_sampling.dev_attr.attr, 210 &sensor_dev_attr_adc_ref_vdd.dev_attr.attr, 211 NULL 212 }; 213 ATTRIBUTE_GROUPS(adt7411); 214 215 static int adt7411_read_in_alarm(struct device *dev, int channel, long *val) 216 { 217 struct adt7411_data *data = dev_get_drvdata(dev); 218 struct i2c_client *client = data->client; 219 int ret; 220 221 ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]); 222 if (ret < 0) 223 return ret; 224 *val = !!(ret & adt7411_in_alarm_bits[channel]); 225 return 0; 226 } 227 228 static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val) 229 { 230 struct adt7411_data *data = dev_get_drvdata(dev); 231 struct i2c_client *client = data->client; 232 int ret; 233 234 switch (attr) { 235 case hwmon_in_input: 236 ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB, 237 ADT7411_REG_VDD_MSB, 2); 238 if (ret < 0) 239 return ret; 240 *val = ret * 7000 / 1024; 241 return 0; 242 case hwmon_in_min: 243 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW); 244 if (ret < 0) 245 return ret; 246 *val = ret * 7000 / 256; 247 return 0; 248 case hwmon_in_max: 249 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH); 250 if (ret < 0) 251 return ret; 252 *val = ret * 7000 / 256; 253 return 0; 254 case hwmon_in_alarm: 255 return adt7411_read_in_alarm(dev, 0, val); 256 default: 257 return -EOPNOTSUPP; 258 } 259 } 260 261 static int adt7411_update_vref(struct device *dev) 262 { 263 struct adt7411_data *data = dev_get_drvdata(dev); 264 struct i2c_client *client = data->client; 265 int val; 266 267 if (time_after_eq(jiffies, data->next_update)) { 268 val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3); 269 if (val < 0) 270 return val; 271 272 if (val & ADT7411_CFG3_REF_VDD) { 273 val = adt7411_read_in_vdd(dev, hwmon_in_input, 274 &data->vref_cached); 275 if (val < 0) 276 return val; 277 } else { 278 data->vref_cached = 2250; 279 } 280 281 data->next_update = jiffies + HZ; 282 } 283 284 return 0; 285 } 286 287 static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel, 288 long *val) 289 { 290 struct adt7411_data *data = dev_get_drvdata(dev); 291 struct i2c_client *client = data->client; 292 293 int ret; 294 int reg, lsb_reg, lsb_shift; 295 int nr = channel - 1; 296 297 mutex_lock(&data->update_lock); 298 ret = adt7411_update_vref(dev); 299 if (ret < 0) 300 goto exit_unlock; 301 302 switch (attr) { 303 case hwmon_in_input: 304 lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2); 305 lsb_shift = 2 * (nr & 0x03); 306 ret = adt7411_read_10_bit(client, lsb_reg, 307 ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, 308 lsb_shift); 309 if (ret < 0) 310 goto exit_unlock; 311 *val = ret * data->vref_cached / 1024; 312 ret = 0; 313 break; 314 case hwmon_in_min: 315 case hwmon_in_max: 316 reg = (attr == hwmon_in_min) 317 ? ADT7411_REG_IN_LOW(channel) 318 : ADT7411_REG_IN_HIGH(channel); 319 ret = i2c_smbus_read_byte_data(client, reg); 320 if (ret < 0) 321 goto exit_unlock; 322 *val = ret * data->vref_cached / 256; 323 ret = 0; 324 break; 325 case hwmon_in_alarm: 326 ret = adt7411_read_in_alarm(dev, channel, val); 327 break; 328 default: 329 ret = -EOPNOTSUPP; 330 break; 331 } 332 exit_unlock: 333 mutex_unlock(&data->update_lock); 334 return ret; 335 } 336 337 static int adt7411_read_in(struct device *dev, u32 attr, int channel, 338 long *val) 339 { 340 if (channel == 0) 341 return adt7411_read_in_vdd(dev, attr, val); 342 else 343 return adt7411_read_in_chan(dev, attr, channel, val); 344 } 345 346 347 static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel, 348 long *val) 349 { 350 struct adt7411_data *data = dev_get_drvdata(dev); 351 struct i2c_client *client = data->client; 352 int ret, bit; 353 354 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1); 355 if (ret < 0) 356 return ret; 357 358 switch (attr) { 359 case hwmon_temp_min_alarm: 360 bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW 361 : ADT7411_STAT_1_INT_TEMP_LOW; 362 break; 363 case hwmon_temp_max_alarm: 364 bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 365 : ADT7411_STAT_1_INT_TEMP_HIGH; 366 break; 367 case hwmon_temp_fault: 368 bit = ADT7411_STAT_1_EXT_TEMP_FAULT; 369 break; 370 default: 371 return -EOPNOTSUPP; 372 } 373 374 *val = !!(ret & bit); 375 return 0; 376 } 377 378 static int adt7411_read_temp(struct device *dev, u32 attr, int channel, 379 long *val) 380 { 381 struct adt7411_data *data = dev_get_drvdata(dev); 382 struct i2c_client *client = data->client; 383 int ret, reg, regl, regh; 384 385 switch (attr) { 386 case hwmon_temp_input: 387 regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB : 388 ADT7411_REG_INT_TEMP_VDD_LSB; 389 regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB : 390 ADT7411_REG_INT_TEMP_MSB; 391 ret = adt7411_read_10_bit(client, regl, regh, 0); 392 if (ret < 0) 393 return ret; 394 ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */ 395 *val = ret * 250; 396 return 0; 397 case hwmon_temp_min: 398 case hwmon_temp_max: 399 reg = (attr == hwmon_temp_min) 400 ? ADT7411_REG_TEMP_LOW(channel) 401 : ADT7411_REG_TEMP_HIGH(channel); 402 ret = i2c_smbus_read_byte_data(client, reg); 403 if (ret < 0) 404 return ret; 405 ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */ 406 *val = ret * 1000; 407 return 0; 408 case hwmon_temp_min_alarm: 409 case hwmon_temp_max_alarm: 410 case hwmon_temp_fault: 411 return adt7411_read_temp_alarm(dev, attr, channel, val); 412 default: 413 return -EOPNOTSUPP; 414 } 415 } 416 417 static int adt7411_read(struct device *dev, enum hwmon_sensor_types type, 418 u32 attr, int channel, long *val) 419 { 420 switch (type) { 421 case hwmon_in: 422 return adt7411_read_in(dev, attr, channel, val); 423 case hwmon_temp: 424 return adt7411_read_temp(dev, attr, channel, val); 425 default: 426 return -EOPNOTSUPP; 427 } 428 } 429 430 static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val) 431 { 432 struct adt7411_data *data = dev_get_drvdata(dev); 433 struct i2c_client *client = data->client; 434 int reg; 435 436 val = clamp_val(val, 0, 255 * 7000 / 256); 437 val = DIV_ROUND_CLOSEST(val * 256, 7000); 438 439 switch (attr) { 440 case hwmon_in_min: 441 reg = ADT7411_REG_VDD_LOW; 442 break; 443 case hwmon_in_max: 444 reg = ADT7411_REG_VDD_HIGH; 445 break; 446 default: 447 return -EOPNOTSUPP; 448 } 449 450 return i2c_smbus_write_byte_data(client, reg, val); 451 } 452 453 static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel, 454 long val) 455 { 456 struct adt7411_data *data = dev_get_drvdata(dev); 457 struct i2c_client *client = data->client; 458 int ret, reg; 459 460 mutex_lock(&data->update_lock); 461 ret = adt7411_update_vref(dev); 462 if (ret < 0) 463 goto exit_unlock; 464 val = clamp_val(val, 0, 255 * data->vref_cached / 256); 465 val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached); 466 467 switch (attr) { 468 case hwmon_in_min: 469 reg = ADT7411_REG_IN_LOW(channel); 470 break; 471 case hwmon_in_max: 472 reg = ADT7411_REG_IN_HIGH(channel); 473 break; 474 default: 475 ret = -EOPNOTSUPP; 476 goto exit_unlock; 477 } 478 479 ret = i2c_smbus_write_byte_data(client, reg, val); 480 exit_unlock: 481 mutex_unlock(&data->update_lock); 482 return ret; 483 } 484 485 static int adt7411_write_in(struct device *dev, u32 attr, int channel, 486 long val) 487 { 488 if (channel == 0) 489 return adt7411_write_in_vdd(dev, attr, val); 490 else 491 return adt7411_write_in_chan(dev, attr, channel, val); 492 } 493 494 static int adt7411_write_temp(struct device *dev, u32 attr, int channel, 495 long val) 496 { 497 struct adt7411_data *data = dev_get_drvdata(dev); 498 struct i2c_client *client = data->client; 499 int reg; 500 501 val = clamp_val(val, -128000, 127000); 502 val = DIV_ROUND_CLOSEST(val, 1000); 503 504 switch (attr) { 505 case hwmon_temp_min: 506 reg = ADT7411_REG_TEMP_LOW(channel); 507 break; 508 case hwmon_temp_max: 509 reg = ADT7411_REG_TEMP_HIGH(channel); 510 break; 511 default: 512 return -EOPNOTSUPP; 513 } 514 515 return i2c_smbus_write_byte_data(client, reg, val); 516 } 517 518 static int adt7411_write(struct device *dev, enum hwmon_sensor_types type, 519 u32 attr, int channel, long val) 520 { 521 switch (type) { 522 case hwmon_in: 523 return adt7411_write_in(dev, attr, channel, val); 524 case hwmon_temp: 525 return adt7411_write_temp(dev, attr, channel, val); 526 default: 527 return -EOPNOTSUPP; 528 } 529 } 530 531 static umode_t adt7411_is_visible(const void *_data, 532 enum hwmon_sensor_types type, 533 u32 attr, int channel) 534 { 535 const struct adt7411_data *data = _data; 536 bool visible; 537 538 switch (type) { 539 case hwmon_in: 540 visible = channel == 0 || channel >= 3 || !data->use_ext_temp; 541 switch (attr) { 542 case hwmon_in_input: 543 case hwmon_in_alarm: 544 return visible ? S_IRUGO : 0; 545 case hwmon_in_min: 546 case hwmon_in_max: 547 return visible ? S_IRUGO | S_IWUSR : 0; 548 } 549 break; 550 case hwmon_temp: 551 visible = channel == 0 || data->use_ext_temp; 552 switch (attr) { 553 case hwmon_temp_input: 554 case hwmon_temp_min_alarm: 555 case hwmon_temp_max_alarm: 556 case hwmon_temp_fault: 557 return visible ? S_IRUGO : 0; 558 case hwmon_temp_min: 559 case hwmon_temp_max: 560 return visible ? S_IRUGO | S_IWUSR : 0; 561 } 562 break; 563 default: 564 break; 565 } 566 return 0; 567 } 568 569 static int adt7411_detect(struct i2c_client *client, 570 struct i2c_board_info *info) 571 { 572 int val; 573 574 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 575 return -ENODEV; 576 577 val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID); 578 if (val < 0 || val != ADT7411_MANUFACTURER_ID) { 579 dev_dbg(&client->dev, 580 "Wrong manufacturer ID. Got %d, expected %d\n", 581 val, ADT7411_MANUFACTURER_ID); 582 return -ENODEV; 583 } 584 585 val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID); 586 if (val < 0 || val != ADT7411_DEVICE_ID) { 587 dev_dbg(&client->dev, 588 "Wrong device ID. Got %d, expected %d\n", 589 val, ADT7411_DEVICE_ID); 590 return -ENODEV; 591 } 592 593 strlcpy(info->type, "adt7411", I2C_NAME_SIZE); 594 595 return 0; 596 } 597 598 static int adt7411_init_device(struct adt7411_data *data) 599 { 600 int ret; 601 u8 val; 602 603 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3); 604 if (ret < 0) 605 return ret; 606 607 /* 608 * We must only write zero to bit 1 and bit 2 and only one to bit 3 609 * according to the datasheet. 610 */ 611 val = ret; 612 val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2); 613 val |= ADT7411_CFG3_RESERVED_BIT3; 614 615 ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val); 616 if (ret < 0) 617 return ret; 618 619 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1); 620 if (ret < 0) 621 return ret; 622 623 data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM; 624 625 /* 626 * We must only write zero to bit 1 and only one to bit 3 according to 627 * the datasheet. 628 */ 629 val = ret; 630 val &= ~ADT7411_CFG1_RESERVED_BIT1; 631 val |= ADT7411_CFG1_RESERVED_BIT3; 632 633 /* enable monitoring */ 634 val |= ADT7411_CFG1_START_MONITOR; 635 636 return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val); 637 } 638 639 static const struct hwmon_channel_info *adt7411_info[] = { 640 HWMON_CHANNEL_INFO(in, 641 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 642 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 643 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 644 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 645 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 646 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 647 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 648 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 649 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), 650 HWMON_CHANNEL_INFO(temp, 651 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | 652 HWMON_T_MAX | HWMON_T_MAX_ALARM, 653 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | 654 HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT), 655 NULL 656 }; 657 658 static const struct hwmon_ops adt7411_hwmon_ops = { 659 .is_visible = adt7411_is_visible, 660 .read = adt7411_read, 661 .write = adt7411_write, 662 }; 663 664 static const struct hwmon_chip_info adt7411_chip_info = { 665 .ops = &adt7411_hwmon_ops, 666 .info = adt7411_info, 667 }; 668 669 static int adt7411_probe(struct i2c_client *client, 670 const struct i2c_device_id *id) 671 { 672 struct device *dev = &client->dev; 673 struct adt7411_data *data; 674 struct device *hwmon_dev; 675 int ret; 676 677 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 678 if (!data) 679 return -ENOMEM; 680 681 i2c_set_clientdata(client, data); 682 data->client = client; 683 mutex_init(&data->device_lock); 684 mutex_init(&data->update_lock); 685 686 ret = adt7411_init_device(data); 687 if (ret < 0) 688 return ret; 689 690 /* force update on first occasion */ 691 data->next_update = jiffies; 692 693 hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, 694 data, 695 &adt7411_chip_info, 696 adt7411_groups); 697 return PTR_ERR_OR_ZERO(hwmon_dev); 698 } 699 700 static const struct i2c_device_id adt7411_id[] = { 701 { "adt7411", 0 }, 702 { } 703 }; 704 MODULE_DEVICE_TABLE(i2c, adt7411_id); 705 706 static struct i2c_driver adt7411_driver = { 707 .driver = { 708 .name = "adt7411", 709 }, 710 .probe = adt7411_probe, 711 .id_table = adt7411_id, 712 .detect = adt7411_detect, 713 .address_list = normal_i2c, 714 .class = I2C_CLASS_HWMON, 715 }; 716 717 module_i2c_driver(adt7411_driver); 718 719 MODULE_AUTHOR("Sascha Hauer, Wolfram Sang <kernel@pengutronix.de>"); 720 MODULE_DESCRIPTION("ADT7411 driver"); 721 MODULE_LICENSE("GPL v2"); 722