1 /* 2 * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor) 3 * 4 * Copyright (C) 2008, 2010 Pengutronix 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * TODO: SPI, use power-down mode for suspend?, interrupt handling? 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/err.h> 17 #include <linux/mutex.h> 18 #include <linux/jiffies.h> 19 #include <linux/i2c.h> 20 #include <linux/hwmon.h> 21 #include <linux/hwmon-sysfs.h> 22 #include <linux/slab.h> 23 24 #define ADT7411_REG_STAT_1 0x00 25 #define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0) 26 #define ADT7411_STAT_1_INT_TEMP_LOW BIT(1) 27 #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2) 28 #define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3) 29 #define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4) 30 #define ADT7411_STAT_1_AIN2 BIT(5) 31 #define ADT7411_STAT_1_AIN3 BIT(6) 32 #define ADT7411_STAT_1_AIN4 BIT(7) 33 #define ADT7411_REG_STAT_2 0x01 34 #define ADT7411_STAT_2_AIN5 BIT(0) 35 #define ADT7411_STAT_2_AIN6 BIT(1) 36 #define ADT7411_STAT_2_AIN7 BIT(2) 37 #define ADT7411_STAT_2_AIN8 BIT(3) 38 #define ADT7411_STAT_2_VDD BIT(4) 39 #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03 40 #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04 41 #define ADT7411_REG_VDD_MSB 0x06 42 #define ADT7411_REG_INT_TEMP_MSB 0x07 43 #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08 44 45 #define ADT7411_REG_CFG1 0x18 46 #define ADT7411_CFG1_START_MONITOR BIT(0) 47 #define ADT7411_CFG1_RESERVED_BIT1 BIT(1) 48 #define ADT7411_CFG1_EXT_TDM BIT(2) 49 #define ADT7411_CFG1_RESERVED_BIT3 BIT(3) 50 51 #define ADT7411_REG_CFG2 0x19 52 #define ADT7411_CFG2_DISABLE_AVG BIT(5) 53 54 #define ADT7411_REG_CFG3 0x1a 55 #define ADT7411_CFG3_ADC_CLK_225 BIT(0) 56 #define ADT7411_CFG3_RESERVED_BIT1 BIT(1) 57 #define ADT7411_CFG3_RESERVED_BIT2 BIT(2) 58 #define ADT7411_CFG3_RESERVED_BIT3 BIT(3) 59 #define ADT7411_CFG3_REF_VDD BIT(4) 60 61 #define ADT7411_REG_VDD_HIGH 0x23 62 #define ADT7411_REG_VDD_LOW 0x24 63 #define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr)) 64 #define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr)) 65 #define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \ 66 ? 0x2b + 2 * ((nr)-2) \ 67 : 0x27) 68 #define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \ 69 ? 0x2c + 2 * ((nr)-2) \ 70 : 0x28) 71 72 #define ADT7411_REG_DEVICE_ID 0x4d 73 #define ADT7411_REG_MANUFACTURER_ID 0x4e 74 75 #define ADT7411_DEVICE_ID 0x2 76 #define ADT7411_MANUFACTURER_ID 0x41 77 78 static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END }; 79 80 static const u8 adt7411_in_alarm_reg[] = { 81 ADT7411_REG_STAT_2, 82 ADT7411_REG_STAT_1, 83 ADT7411_REG_STAT_1, 84 ADT7411_REG_STAT_1, 85 ADT7411_REG_STAT_1, 86 ADT7411_REG_STAT_2, 87 ADT7411_REG_STAT_2, 88 ADT7411_REG_STAT_2, 89 ADT7411_REG_STAT_2, 90 }; 91 92 static const u8 adt7411_in_alarm_bits[] = { 93 ADT7411_STAT_2_VDD, 94 ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1, 95 ADT7411_STAT_1_AIN2, 96 ADT7411_STAT_1_AIN3, 97 ADT7411_STAT_1_AIN4, 98 ADT7411_STAT_2_AIN5, 99 ADT7411_STAT_2_AIN6, 100 ADT7411_STAT_2_AIN7, 101 ADT7411_STAT_2_AIN8, 102 }; 103 104 struct adt7411_data { 105 struct mutex device_lock; /* for "atomic" device accesses */ 106 struct mutex update_lock; 107 unsigned long next_update; 108 long vref_cached; 109 struct i2c_client *client; 110 bool use_ext_temp; 111 }; 112 113 /* 114 * When reading a register containing (up to 4) lsb, all associated 115 * msb-registers get locked by the hardware. After _one_ of those msb is read, 116 * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb 117 * is protected here with a mutex, too. 118 */ 119 static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg, 120 u8 msb_reg, u8 lsb_shift) 121 { 122 struct adt7411_data *data = i2c_get_clientdata(client); 123 int val, tmp; 124 125 mutex_lock(&data->device_lock); 126 127 val = i2c_smbus_read_byte_data(client, lsb_reg); 128 if (val < 0) 129 goto exit_unlock; 130 131 tmp = (val >> lsb_shift) & 3; 132 val = i2c_smbus_read_byte_data(client, msb_reg); 133 134 if (val >= 0) 135 val = (val << 2) | tmp; 136 137 exit_unlock: 138 mutex_unlock(&data->device_lock); 139 140 return val; 141 } 142 143 static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit, 144 bool flag) 145 { 146 struct adt7411_data *data = i2c_get_clientdata(client); 147 int ret, val; 148 149 mutex_lock(&data->device_lock); 150 151 ret = i2c_smbus_read_byte_data(client, reg); 152 if (ret < 0) 153 goto exit_unlock; 154 155 if (flag) 156 val = ret | bit; 157 else 158 val = ret & ~bit; 159 160 ret = i2c_smbus_write_byte_data(client, reg, val); 161 162 exit_unlock: 163 mutex_unlock(&data->device_lock); 164 return ret; 165 } 166 167 static ssize_t adt7411_show_bit(struct device *dev, 168 struct device_attribute *attr, char *buf) 169 { 170 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr); 171 struct adt7411_data *data = dev_get_drvdata(dev); 172 struct i2c_client *client = data->client; 173 int ret = i2c_smbus_read_byte_data(client, attr2->index); 174 175 return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr)); 176 } 177 178 static ssize_t adt7411_set_bit(struct device *dev, 179 struct device_attribute *attr, const char *buf, 180 size_t count) 181 { 182 struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr); 183 struct adt7411_data *data = dev_get_drvdata(dev); 184 struct i2c_client *client = data->client; 185 int ret; 186 unsigned long flag; 187 188 ret = kstrtoul(buf, 0, &flag); 189 if (ret || flag > 1) 190 return -EINVAL; 191 192 ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag); 193 194 /* force update */ 195 mutex_lock(&data->update_lock); 196 data->next_update = jiffies; 197 mutex_unlock(&data->update_lock); 198 199 return ret < 0 ? ret : count; 200 } 201 202 #define ADT7411_BIT_ATTR(__name, __reg, __bit) \ 203 SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \ 204 adt7411_set_bit, __bit, __reg) 205 206 static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG); 207 static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225); 208 static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD); 209 210 static struct attribute *adt7411_attrs[] = { 211 &sensor_dev_attr_no_average.dev_attr.attr, 212 &sensor_dev_attr_fast_sampling.dev_attr.attr, 213 &sensor_dev_attr_adc_ref_vdd.dev_attr.attr, 214 NULL 215 }; 216 ATTRIBUTE_GROUPS(adt7411); 217 218 static int adt7411_read_in_alarm(struct device *dev, int channel, long *val) 219 { 220 struct adt7411_data *data = dev_get_drvdata(dev); 221 struct i2c_client *client = data->client; 222 int ret; 223 224 ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]); 225 if (ret < 0) 226 return ret; 227 *val = !!(ret & adt7411_in_alarm_bits[channel]); 228 return 0; 229 } 230 231 static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val) 232 { 233 struct adt7411_data *data = dev_get_drvdata(dev); 234 struct i2c_client *client = data->client; 235 int ret; 236 237 switch (attr) { 238 case hwmon_in_input: 239 ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB, 240 ADT7411_REG_VDD_MSB, 2); 241 if (ret < 0) 242 return ret; 243 *val = ret * 7000 / 1024; 244 return 0; 245 case hwmon_in_min: 246 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW); 247 if (ret < 0) 248 return ret; 249 *val = ret * 7000 / 256; 250 return 0; 251 case hwmon_in_max: 252 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH); 253 if (ret < 0) 254 return ret; 255 *val = ret * 7000 / 256; 256 return 0; 257 case hwmon_in_alarm: 258 return adt7411_read_in_alarm(dev, 0, val); 259 default: 260 return -EOPNOTSUPP; 261 } 262 } 263 264 static int adt7411_update_vref(struct device *dev) 265 { 266 struct adt7411_data *data = dev_get_drvdata(dev); 267 struct i2c_client *client = data->client; 268 int val; 269 270 if (time_after_eq(jiffies, data->next_update)) { 271 val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3); 272 if (val < 0) 273 return val; 274 275 if (val & ADT7411_CFG3_REF_VDD) { 276 val = adt7411_read_in_vdd(dev, hwmon_in_input, 277 &data->vref_cached); 278 if (val < 0) 279 return val; 280 } else { 281 data->vref_cached = 2250; 282 } 283 284 data->next_update = jiffies + HZ; 285 } 286 287 return 0; 288 } 289 290 static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel, 291 long *val) 292 { 293 struct adt7411_data *data = dev_get_drvdata(dev); 294 struct i2c_client *client = data->client; 295 296 int ret; 297 int reg, lsb_reg, lsb_shift; 298 int nr = channel - 1; 299 300 mutex_lock(&data->update_lock); 301 ret = adt7411_update_vref(dev); 302 if (ret < 0) 303 goto exit_unlock; 304 305 switch (attr) { 306 case hwmon_in_input: 307 lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2); 308 lsb_shift = 2 * (nr & 0x03); 309 ret = adt7411_read_10_bit(client, lsb_reg, 310 ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, 311 lsb_shift); 312 if (ret < 0) 313 goto exit_unlock; 314 *val = ret * data->vref_cached / 1024; 315 ret = 0; 316 break; 317 case hwmon_in_min: 318 case hwmon_in_max: 319 reg = (attr == hwmon_in_min) 320 ? ADT7411_REG_IN_LOW(channel) 321 : ADT7411_REG_IN_HIGH(channel); 322 ret = i2c_smbus_read_byte_data(client, reg); 323 if (ret < 0) 324 goto exit_unlock; 325 *val = ret * data->vref_cached / 256; 326 ret = 0; 327 break; 328 case hwmon_in_alarm: 329 ret = adt7411_read_in_alarm(dev, channel, val); 330 break; 331 default: 332 ret = -EOPNOTSUPP; 333 break; 334 } 335 exit_unlock: 336 mutex_unlock(&data->update_lock); 337 return ret; 338 } 339 340 static int adt7411_read_in(struct device *dev, u32 attr, int channel, 341 long *val) 342 { 343 if (channel == 0) 344 return adt7411_read_in_vdd(dev, attr, val); 345 else 346 return adt7411_read_in_chan(dev, attr, channel, val); 347 } 348 349 350 static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel, 351 long *val) 352 { 353 struct adt7411_data *data = dev_get_drvdata(dev); 354 struct i2c_client *client = data->client; 355 int ret, bit; 356 357 ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1); 358 if (ret < 0) 359 return ret; 360 361 switch (attr) { 362 case hwmon_temp_min_alarm: 363 bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW 364 : ADT7411_STAT_1_INT_TEMP_LOW; 365 break; 366 case hwmon_temp_max_alarm: 367 bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 368 : ADT7411_STAT_1_INT_TEMP_HIGH; 369 break; 370 case hwmon_temp_fault: 371 bit = ADT7411_STAT_1_EXT_TEMP_FAULT; 372 break; 373 default: 374 return -EOPNOTSUPP; 375 } 376 377 *val = !!(ret & bit); 378 return 0; 379 } 380 381 static int adt7411_read_temp(struct device *dev, u32 attr, int channel, 382 long *val) 383 { 384 struct adt7411_data *data = dev_get_drvdata(dev); 385 struct i2c_client *client = data->client; 386 int ret, reg, regl, regh; 387 388 switch (attr) { 389 case hwmon_temp_input: 390 regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB : 391 ADT7411_REG_INT_TEMP_VDD_LSB; 392 regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB : 393 ADT7411_REG_INT_TEMP_MSB; 394 ret = adt7411_read_10_bit(client, regl, regh, 0); 395 if (ret < 0) 396 return ret; 397 ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */ 398 *val = ret * 250; 399 return 0; 400 case hwmon_temp_min: 401 case hwmon_temp_max: 402 reg = (attr == hwmon_temp_min) 403 ? ADT7411_REG_TEMP_LOW(channel) 404 : ADT7411_REG_TEMP_HIGH(channel); 405 ret = i2c_smbus_read_byte_data(client, reg); 406 if (ret < 0) 407 return ret; 408 ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */ 409 *val = ret * 1000; 410 return 0; 411 case hwmon_temp_min_alarm: 412 case hwmon_temp_max_alarm: 413 case hwmon_temp_fault: 414 return adt7411_read_temp_alarm(dev, attr, channel, val); 415 default: 416 return -EOPNOTSUPP; 417 } 418 } 419 420 static int adt7411_read(struct device *dev, enum hwmon_sensor_types type, 421 u32 attr, int channel, long *val) 422 { 423 switch (type) { 424 case hwmon_in: 425 return adt7411_read_in(dev, attr, channel, val); 426 case hwmon_temp: 427 return adt7411_read_temp(dev, attr, channel, val); 428 default: 429 return -EOPNOTSUPP; 430 } 431 } 432 433 static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val) 434 { 435 struct adt7411_data *data = dev_get_drvdata(dev); 436 struct i2c_client *client = data->client; 437 int reg; 438 439 val = clamp_val(val, 0, 255 * 7000 / 256); 440 val = DIV_ROUND_CLOSEST(val * 256, 7000); 441 442 switch (attr) { 443 case hwmon_in_min: 444 reg = ADT7411_REG_VDD_LOW; 445 break; 446 case hwmon_in_max: 447 reg = ADT7411_REG_VDD_HIGH; 448 break; 449 default: 450 return -EOPNOTSUPP; 451 } 452 453 return i2c_smbus_write_byte_data(client, reg, val); 454 } 455 456 static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel, 457 long val) 458 { 459 struct adt7411_data *data = dev_get_drvdata(dev); 460 struct i2c_client *client = data->client; 461 int ret, reg; 462 463 mutex_lock(&data->update_lock); 464 ret = adt7411_update_vref(dev); 465 if (ret < 0) 466 goto exit_unlock; 467 val = clamp_val(val, 0, 255 * data->vref_cached / 256); 468 val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached); 469 470 switch (attr) { 471 case hwmon_in_min: 472 reg = ADT7411_REG_IN_LOW(channel); 473 break; 474 case hwmon_in_max: 475 reg = ADT7411_REG_IN_HIGH(channel); 476 break; 477 default: 478 ret = -EOPNOTSUPP; 479 goto exit_unlock; 480 } 481 482 ret = i2c_smbus_write_byte_data(client, reg, val); 483 exit_unlock: 484 mutex_unlock(&data->update_lock); 485 return ret; 486 } 487 488 static int adt7411_write_in(struct device *dev, u32 attr, int channel, 489 long val) 490 { 491 if (channel == 0) 492 return adt7411_write_in_vdd(dev, attr, val); 493 else 494 return adt7411_write_in_chan(dev, attr, channel, val); 495 } 496 497 static int adt7411_write_temp(struct device *dev, u32 attr, int channel, 498 long val) 499 { 500 struct adt7411_data *data = dev_get_drvdata(dev); 501 struct i2c_client *client = data->client; 502 int reg; 503 504 val = clamp_val(val, -128000, 127000); 505 val = DIV_ROUND_CLOSEST(val, 1000); 506 507 switch (attr) { 508 case hwmon_temp_min: 509 reg = ADT7411_REG_TEMP_LOW(channel); 510 break; 511 case hwmon_temp_max: 512 reg = ADT7411_REG_TEMP_HIGH(channel); 513 break; 514 default: 515 return -EOPNOTSUPP; 516 } 517 518 return i2c_smbus_write_byte_data(client, reg, val); 519 } 520 521 static int adt7411_write(struct device *dev, enum hwmon_sensor_types type, 522 u32 attr, int channel, long val) 523 { 524 switch (type) { 525 case hwmon_in: 526 return adt7411_write_in(dev, attr, channel, val); 527 case hwmon_temp: 528 return adt7411_write_temp(dev, attr, channel, val); 529 default: 530 return -EOPNOTSUPP; 531 } 532 } 533 534 static umode_t adt7411_is_visible(const void *_data, 535 enum hwmon_sensor_types type, 536 u32 attr, int channel) 537 { 538 const struct adt7411_data *data = _data; 539 bool visible; 540 541 switch (type) { 542 case hwmon_in: 543 visible = channel == 0 || channel >= 3 || !data->use_ext_temp; 544 switch (attr) { 545 case hwmon_in_input: 546 case hwmon_in_alarm: 547 return visible ? S_IRUGO : 0; 548 case hwmon_in_min: 549 case hwmon_in_max: 550 return visible ? S_IRUGO | S_IWUSR : 0; 551 } 552 break; 553 case hwmon_temp: 554 visible = channel == 0 || data->use_ext_temp; 555 switch (attr) { 556 case hwmon_temp_input: 557 case hwmon_temp_min_alarm: 558 case hwmon_temp_max_alarm: 559 case hwmon_temp_fault: 560 return visible ? S_IRUGO : 0; 561 case hwmon_temp_min: 562 case hwmon_temp_max: 563 return visible ? S_IRUGO | S_IWUSR : 0; 564 } 565 break; 566 default: 567 break; 568 } 569 return 0; 570 } 571 572 static int adt7411_detect(struct i2c_client *client, 573 struct i2c_board_info *info) 574 { 575 int val; 576 577 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 578 return -ENODEV; 579 580 val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID); 581 if (val < 0 || val != ADT7411_MANUFACTURER_ID) { 582 dev_dbg(&client->dev, 583 "Wrong manufacturer ID. Got %d, expected %d\n", 584 val, ADT7411_MANUFACTURER_ID); 585 return -ENODEV; 586 } 587 588 val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID); 589 if (val < 0 || val != ADT7411_DEVICE_ID) { 590 dev_dbg(&client->dev, 591 "Wrong device ID. Got %d, expected %d\n", 592 val, ADT7411_DEVICE_ID); 593 return -ENODEV; 594 } 595 596 strlcpy(info->type, "adt7411", I2C_NAME_SIZE); 597 598 return 0; 599 } 600 601 static int adt7411_init_device(struct adt7411_data *data) 602 { 603 int ret; 604 u8 val; 605 606 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3); 607 if (ret < 0) 608 return ret; 609 610 /* 611 * We must only write zero to bit 1 and bit 2 and only one to bit 3 612 * according to the datasheet. 613 */ 614 val = ret; 615 val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2); 616 val |= ADT7411_CFG3_RESERVED_BIT3; 617 618 ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val); 619 if (ret < 0) 620 return ret; 621 622 ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1); 623 if (ret < 0) 624 return ret; 625 626 data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM; 627 628 /* 629 * We must only write zero to bit 1 and only one to bit 3 according to 630 * the datasheet. 631 */ 632 val = ret; 633 val &= ~ADT7411_CFG1_RESERVED_BIT1; 634 val |= ADT7411_CFG1_RESERVED_BIT3; 635 636 /* enable monitoring */ 637 val |= ADT7411_CFG1_START_MONITOR; 638 639 return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val); 640 } 641 642 static const struct hwmon_channel_info *adt7411_info[] = { 643 HWMON_CHANNEL_INFO(in, 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_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 651 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, 652 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), 653 HWMON_CHANNEL_INFO(temp, 654 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | 655 HWMON_T_MAX | HWMON_T_MAX_ALARM, 656 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | 657 HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT), 658 NULL 659 }; 660 661 static const struct hwmon_ops adt7411_hwmon_ops = { 662 .is_visible = adt7411_is_visible, 663 .read = adt7411_read, 664 .write = adt7411_write, 665 }; 666 667 static const struct hwmon_chip_info adt7411_chip_info = { 668 .ops = &adt7411_hwmon_ops, 669 .info = adt7411_info, 670 }; 671 672 static int adt7411_probe(struct i2c_client *client, 673 const struct i2c_device_id *id) 674 { 675 struct device *dev = &client->dev; 676 struct adt7411_data *data; 677 struct device *hwmon_dev; 678 int ret; 679 680 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 681 if (!data) 682 return -ENOMEM; 683 684 i2c_set_clientdata(client, data); 685 data->client = client; 686 mutex_init(&data->device_lock); 687 mutex_init(&data->update_lock); 688 689 ret = adt7411_init_device(data); 690 if (ret < 0) 691 return ret; 692 693 /* force update on first occasion */ 694 data->next_update = jiffies; 695 696 hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, 697 data, 698 &adt7411_chip_info, 699 adt7411_groups); 700 return PTR_ERR_OR_ZERO(hwmon_dev); 701 } 702 703 static const struct i2c_device_id adt7411_id[] = { 704 { "adt7411", 0 }, 705 { } 706 }; 707 MODULE_DEVICE_TABLE(i2c, adt7411_id); 708 709 static struct i2c_driver adt7411_driver = { 710 .driver = { 711 .name = "adt7411", 712 }, 713 .probe = adt7411_probe, 714 .id_table = adt7411_id, 715 .detect = adt7411_detect, 716 .address_list = normal_i2c, 717 .class = I2C_CLASS_HWMON, 718 }; 719 720 module_i2c_driver(adt7411_driver); 721 722 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and " 723 "Wolfram Sang <w.sang@pengutronix.de>"); 724 MODULE_DESCRIPTION("ADT7411 driver"); 725 MODULE_LICENSE("GPL v2"); 726