| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * emc1403.c - SMSC Thermal Driver |
| 4 | * |
| 5 | * Copyright (C) 2008 Intel Corp |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/i2c.h> |
| 16 | #include <linux/hwmon.h> |
| 17 | #include <linux/hwmon-sysfs.h> |
| 18 | #include <linux/err.h> |
| 19 | #include <linux/sysfs.h> |
| 20 | #include <linux/mutex.h> |
| 21 | #include <linux/regmap.h> |
| 22 | #include <linux/util_macros.h> |
| 23 | |
| 24 | #define THERMAL_PID_REG 0xfd |
| 25 | #define THERMAL_SMSC_ID_REG 0xfe |
| 26 | #define THERMAL_REVISION_REG 0xff |
| 27 | |
| 28 | enum emc1403_chip { emc1402, emc1403, emc1404 }; |
| 29 | |
| 30 | struct thermal_data { |
| 31 | enum emc1403_chip chip; |
| 32 | struct regmap *regmap; |
| 33 | struct mutex mutex; |
| 34 | }; |
| 35 | |
| 36 | static ssize_t power_state_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 37 | { |
| 38 | struct thermal_data *data = dev_get_drvdata(dev); |
| 39 | unsigned int val; |
| 40 | int retval; |
| 41 | |
| 42 | retval = regmap_read(data->regmap, 0x03, &val); |
| 43 | if (retval < 0) |
| 44 | return retval; |
| 45 | return sprintf(buf, "%d\n", !!(val & BIT(6))); |
| 46 | } |
| 47 | |
| 48 | static ssize_t power_state_store(struct device *dev, struct device_attribute *attr, |
| 49 | const char *buf, size_t count) |
| 50 | { |
| 51 | struct thermal_data *data = dev_get_drvdata(dev); |
| 52 | unsigned long val; |
| 53 | int retval; |
| 54 | |
| 55 | if (kstrtoul(buf, 10, &val)) |
| 56 | return -EINVAL; |
| 57 | |
| 58 | retval = regmap_update_bits(data->regmap, 0x03, BIT(6), |
| 59 | val ? BIT(6) : 0); |
| 60 | if (retval < 0) |
| 61 | return retval; |
| 62 | return count; |
| 63 | } |
| 64 | |
| 65 | static DEVICE_ATTR_RW(power_state); |
| 66 | |
| 67 | static struct attribute *emc1403_attrs[] = { |
| 68 | &dev_attr_power_state.attr, |
| 69 | NULL |
| 70 | }; |
| 71 | ATTRIBUTE_GROUPS(emc1403); |
| 72 | |
| 73 | static int emc1403_detect(struct i2c_client *client, |
| 74 | struct i2c_board_info *info) |
| 75 | { |
| 76 | int id; |
| 77 | /* Check if thermal chip is SMSC and EMC1403 or EMC1423 */ |
| 78 | |
| 79 | id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG); |
| 80 | if (id != 0x5d) |
| 81 | return -ENODEV; |
| 82 | |
| 83 | id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG); |
| 84 | switch (id) { |
| 85 | case 0x20: |
| 86 | strscpy(info->type, "emc1402", I2C_NAME_SIZE); |
| 87 | break; |
| 88 | case 0x21: |
| 89 | strscpy(info->type, "emc1403", I2C_NAME_SIZE); |
| 90 | break; |
| 91 | case 0x22: |
| 92 | strscpy(info->type, "emc1422", I2C_NAME_SIZE); |
| 93 | break; |
| 94 | case 0x23: |
| 95 | strscpy(info->type, "emc1423", I2C_NAME_SIZE); |
| 96 | break; |
| 97 | case 0x25: |
| 98 | strscpy(info->type, "emc1404", I2C_NAME_SIZE); |
| 99 | break; |
| 100 | case 0x27: |
| 101 | strscpy(info->type, "emc1424", I2C_NAME_SIZE); |
| 102 | break; |
| 103 | case 0x60: |
| 104 | strscpy(info->type, "emc1442", I2C_NAME_SIZE); |
| 105 | break; |
| 106 | default: |
| 107 | return -ENODEV; |
| 108 | } |
| 109 | |
| 110 | id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG); |
| 111 | if (id < 0x01 || id > 0x04) |
| 112 | return -ENODEV; |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg) |
| 118 | { |
| 119 | switch (reg) { |
| 120 | case 0x00: /* internal diode high byte */ |
| 121 | case 0x01: /* external diode 1 high byte */ |
| 122 | case 0x02: /* status */ |
| 123 | case 0x10: /* external diode 1 low byte */ |
| 124 | case 0x1b: /* external diode fault */ |
| 125 | case 0x23: /* external diode 2 high byte */ |
| 126 | case 0x24: /* external diode 2 low byte */ |
| 127 | case 0x29: /* internal diode low byte */ |
| 128 | case 0x2a: /* externl diode 3 high byte */ |
| 129 | case 0x2b: /* external diode 3 low byte */ |
| 130 | case 0x35: /* high limit status */ |
| 131 | case 0x36: /* low limit status */ |
| 132 | case 0x37: /* therm limit status */ |
| 133 | return true; |
| 134 | default: |
| 135 | return false; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | static const struct regmap_config emc1403_regmap_config = { |
| 140 | .reg_bits = 8, |
| 141 | .val_bits = 8, |
| 142 | .cache_type = REGCACHE_MAPLE, |
| 143 | .volatile_reg = emc1403_regmap_is_volatile, |
| 144 | }; |
| 145 | |
| 146 | enum emc1403_reg_map {temp_min, temp_max, temp_crit, temp_input}; |
| 147 | |
| 148 | static u8 ema1403_temp_map[] = { |
| 149 | [hwmon_temp_min] = temp_min, |
| 150 | [hwmon_temp_max] = temp_max, |
| 151 | [hwmon_temp_crit] = temp_crit, |
| 152 | [hwmon_temp_input] = temp_input, |
| 153 | }; |
| 154 | |
| 155 | static u8 emc1403_temp_regs[][4] = { |
| 156 | [0] = { |
| 157 | [temp_min] = 0x06, |
| 158 | [temp_max] = 0x05, |
| 159 | [temp_crit] = 0x20, |
| 160 | [temp_input] = 0x00, |
| 161 | }, |
| 162 | [1] = { |
| 163 | [temp_min] = 0x08, |
| 164 | [temp_max] = 0x07, |
| 165 | [temp_crit] = 0x19, |
| 166 | [temp_input] = 0x01, |
| 167 | }, |
| 168 | [2] = { |
| 169 | [temp_min] = 0x16, |
| 170 | [temp_max] = 0x15, |
| 171 | [temp_crit] = 0x1a, |
| 172 | [temp_input] = 0x23, |
| 173 | }, |
| 174 | [3] = { |
| 175 | [temp_min] = 0x2d, |
| 176 | [temp_max] = 0x2c, |
| 177 | [temp_crit] = 0x30, |
| 178 | [temp_input] = 0x2a, |
| 179 | }, |
| 180 | }; |
| 181 | |
| 182 | static s8 emc1403_temp_regs_low[][4] = { |
| 183 | [0] = { |
| 184 | [temp_min] = -1, |
| 185 | [temp_max] = -1, |
| 186 | [temp_crit] = -1, |
| 187 | [temp_input] = 0x29, |
| 188 | }, |
| 189 | [1] = { |
| 190 | [temp_min] = 0x14, |
| 191 | [temp_max] = 0x13, |
| 192 | [temp_crit] = -1, |
| 193 | [temp_input] = 0x10, |
| 194 | }, |
| 195 | [2] = { |
| 196 | [temp_min] = 0x18, |
| 197 | [temp_max] = 0x17, |
| 198 | [temp_crit] = -1, |
| 199 | [temp_input] = 0x24, |
| 200 | }, |
| 201 | [3] = { |
| 202 | [temp_min] = 0x2f, |
| 203 | [temp_max] = 0x2e, |
| 204 | [temp_crit] = -1, |
| 205 | [temp_input] = 0x2b, |
| 206 | }, |
| 207 | }; |
| 208 | |
| 209 | static int __emc1403_get_temp(struct thermal_data *data, int channel, |
| 210 | enum emc1403_reg_map map, long *val) |
| 211 | { |
| 212 | unsigned int regval; |
| 213 | int ret; |
| 214 | s8 reg; |
| 215 | |
| 216 | ret = regmap_read(data->regmap, emc1403_temp_regs[channel][map], ®val); |
| 217 | if (ret < 0) |
| 218 | return ret; |
| 219 | *val = regval * 1000; |
| 220 | |
| 221 | reg = emc1403_temp_regs_low[channel][map]; |
| 222 | if (reg >= 0) { |
| 223 | ret = regmap_read(data->regmap, reg, ®val); |
| 224 | if (ret < 0) |
| 225 | return ret; |
| 226 | *val += (regval >> 5) * 125; |
| 227 | } |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | static int emc1403_get_temp(struct thermal_data *data, int channel, |
| 232 | enum emc1403_reg_map map, long *val) |
| 233 | { |
| 234 | int ret; |
| 235 | |
| 236 | mutex_lock(&data->mutex); |
| 237 | ret = __emc1403_get_temp(data, channel, map, val); |
| 238 | mutex_unlock(&data->mutex); |
| 239 | |
| 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | static int emc1403_get_hyst(struct thermal_data *data, int channel, |
| 244 | enum emc1403_reg_map map, long *val) |
| 245 | { |
| 246 | int hyst, ret; |
| 247 | long limit; |
| 248 | |
| 249 | mutex_lock(&data->mutex); |
| 250 | ret = __emc1403_get_temp(data, channel, map, &limit); |
| 251 | if (ret < 0) |
| 252 | goto unlock; |
| 253 | ret = regmap_read(data->regmap, 0x21, &hyst); |
| 254 | if (ret < 0) |
| 255 | goto unlock; |
| 256 | if (map == temp_min) |
| 257 | *val = limit + hyst * 1000; |
| 258 | else |
| 259 | *val = limit - hyst * 1000; |
| 260 | unlock: |
| 261 | mutex_unlock(&data->mutex); |
| 262 | return ret; |
| 263 | } |
| 264 | |
| 265 | static int emc1403_temp_read(struct thermal_data *data, u32 attr, int channel, long *val) |
| 266 | { |
| 267 | unsigned int regval; |
| 268 | int ret; |
| 269 | |
| 270 | switch (attr) { |
| 271 | case hwmon_temp_min: |
| 272 | case hwmon_temp_max: |
| 273 | case hwmon_temp_crit: |
| 274 | case hwmon_temp_input: |
| 275 | ret = emc1403_get_temp(data, channel, ema1403_temp_map[attr], val); |
| 276 | break; |
| 277 | case hwmon_temp_min_hyst: |
| 278 | ret = emc1403_get_hyst(data, channel, temp_min, val); |
| 279 | break; |
| 280 | case hwmon_temp_max_hyst: |
| 281 | ret = emc1403_get_hyst(data, channel, temp_max, val); |
| 282 | break; |
| 283 | case hwmon_temp_crit_hyst: |
| 284 | ret = emc1403_get_hyst(data, channel, temp_crit, val); |
| 285 | break; |
| 286 | case hwmon_temp_min_alarm: |
| 287 | if (data->chip == emc1402) { |
| 288 | ret = regmap_read(data->regmap, 0x02, ®val); |
| 289 | if (ret < 0) |
| 290 | break; |
| 291 | *val = !!(regval & BIT(5 - 2 * channel)); |
| 292 | } else { |
| 293 | ret = regmap_read(data->regmap, 0x36, ®val); |
| 294 | if (ret < 0) |
| 295 | break; |
| 296 | *val = !!(regval & BIT(channel)); |
| 297 | } |
| 298 | break; |
| 299 | case hwmon_temp_max_alarm: |
| 300 | if (data->chip == emc1402) { |
| 301 | ret = regmap_read(data->regmap, 0x02, ®val); |
| 302 | if (ret < 0) |
| 303 | break; |
| 304 | *val = !!(regval & BIT(6 - 2 * channel)); |
| 305 | } else { |
| 306 | ret = regmap_read(data->regmap, 0x35, ®val); |
| 307 | if (ret < 0) |
| 308 | break; |
| 309 | *val = !!(regval & BIT(channel)); |
| 310 | } |
| 311 | break; |
| 312 | case hwmon_temp_crit_alarm: |
| 313 | if (data->chip == emc1402) { |
| 314 | ret = regmap_read(data->regmap, 0x02, ®val); |
| 315 | if (ret < 0) |
| 316 | break; |
| 317 | *val = !!(regval & BIT(channel)); |
| 318 | } else { |
| 319 | ret = regmap_read(data->regmap, 0x37, ®val); |
| 320 | if (ret < 0) |
| 321 | break; |
| 322 | *val = !!(regval & BIT(channel)); |
| 323 | } |
| 324 | break; |
| 325 | case hwmon_temp_fault: |
| 326 | ret = regmap_read(data->regmap, 0x1b, ®val); |
| 327 | if (ret < 0) |
| 328 | break; |
| 329 | *val = !!(regval & BIT(channel)); |
| 330 | break; |
| 331 | default: |
| 332 | return -EOPNOTSUPP; |
| 333 | } |
| 334 | return ret; |
| 335 | } |
| 336 | |
| 337 | static int emc1403_get_convrate(struct thermal_data *data, long *val) |
| 338 | { |
| 339 | unsigned int convrate; |
| 340 | int ret; |
| 341 | |
| 342 | ret = regmap_read(data->regmap, 0x04, &convrate); |
| 343 | if (ret < 0) |
| 344 | return ret; |
| 345 | if (convrate > 10) |
| 346 | convrate = 4; |
| 347 | |
| 348 | *val = 16000 >> convrate; |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int emc1403_chip_read(struct thermal_data *data, u32 attr, long *val) |
| 353 | { |
| 354 | switch (attr) { |
| 355 | case hwmon_chip_update_interval: |
| 356 | return emc1403_get_convrate(data, val); |
| 357 | default: |
| 358 | return -EOPNOTSUPP; |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | static int emc1403_read(struct device *dev, enum hwmon_sensor_types type, |
| 363 | u32 attr, int channel, long *val) |
| 364 | { |
| 365 | struct thermal_data *data = dev_get_drvdata(dev); |
| 366 | |
| 367 | switch (type) { |
| 368 | case hwmon_temp: |
| 369 | return emc1403_temp_read(data, attr, channel, val); |
| 370 | case hwmon_chip: |
| 371 | return emc1403_chip_read(data, attr, val); |
| 372 | default: |
| 373 | return -EOPNOTSUPP; |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | static int emc1403_set_hyst(struct thermal_data *data, long val) |
| 378 | { |
| 379 | int hyst, ret; |
| 380 | long limit; |
| 381 | |
| 382 | val = clamp_val(val, 0, 255000); |
| 383 | |
| 384 | mutex_lock(&data->mutex); |
| 385 | ret = __emc1403_get_temp(data, 0, temp_crit, &limit); |
| 386 | if (ret < 0) |
| 387 | goto unlock; |
| 388 | |
| 389 | hyst = limit - val; |
| 390 | hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255); |
| 391 | ret = regmap_write(data->regmap, 0x21, hyst); |
| 392 | unlock: |
| 393 | mutex_unlock(&data->mutex); |
| 394 | return ret; |
| 395 | } |
| 396 | |
| 397 | static int emc1403_set_temp(struct thermal_data *data, int channel, |
| 398 | enum emc1403_reg_map map, long val) |
| 399 | { |
| 400 | unsigned int regval; |
| 401 | int ret; |
| 402 | u8 regh; |
| 403 | s8 regl; |
| 404 | |
| 405 | regh = emc1403_temp_regs[channel][map]; |
| 406 | regl = emc1403_temp_regs_low[channel][map]; |
| 407 | |
| 408 | mutex_lock(&data->mutex); |
| 409 | if (regl >= 0) { |
| 410 | val = clamp_val(val, 0, 255875); |
| 411 | regval = DIV_ROUND_CLOSEST(val, 125); |
| 412 | ret = regmap_write(data->regmap, regh, regval >> 3); |
| 413 | if (ret < 0) |
| 414 | goto unlock; |
| 415 | ret = regmap_write(data->regmap, regl, (regval & 0x07) << 5); |
| 416 | } else { |
| 417 | val = clamp_val(val, 0, 255000); |
| 418 | regval = DIV_ROUND_CLOSEST(val, 1000); |
| 419 | ret = regmap_write(data->regmap, regh, regval); |
| 420 | } |
| 421 | unlock: |
| 422 | mutex_unlock(&data->mutex); |
| 423 | return ret; |
| 424 | } |
| 425 | |
| 426 | static int emc1403_temp_write(struct thermal_data *data, u32 attr, int channel, long val) |
| 427 | { |
| 428 | switch (attr) { |
| 429 | case hwmon_temp_min: |
| 430 | case hwmon_temp_max: |
| 431 | case hwmon_temp_crit: |
| 432 | return emc1403_set_temp(data, channel, ema1403_temp_map[attr], val); |
| 433 | case hwmon_temp_crit_hyst: |
| 434 | return emc1403_set_hyst(data, val); |
| 435 | default: |
| 436 | return -EOPNOTSUPP; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /* Lookup table for temperature conversion times in msec */ |
| 441 | static const u16 ina3221_conv_time[] = { |
| 442 | 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31, 16 |
| 443 | }; |
| 444 | |
| 445 | static int emc1403_set_convrate(struct thermal_data *data, unsigned int interval) |
| 446 | { |
| 447 | int convrate; |
| 448 | |
| 449 | convrate = find_closest_descending(interval, ina3221_conv_time, |
| 450 | ARRAY_SIZE(ina3221_conv_time)); |
| 451 | return regmap_write(data->regmap, 0x04, convrate); |
| 452 | } |
| 453 | |
| 454 | static int emc1403_chip_write(struct thermal_data *data, u32 attr, long val) |
| 455 | { |
| 456 | switch (attr) { |
| 457 | case hwmon_chip_update_interval: |
| 458 | return emc1403_set_convrate(data, clamp_val(val, 0, 100000)); |
| 459 | default: |
| 460 | return -EOPNOTSUPP; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | static int emc1403_write(struct device *dev, enum hwmon_sensor_types type, |
| 465 | u32 attr, int channel, long val) |
| 466 | { |
| 467 | struct thermal_data *data = dev_get_drvdata(dev); |
| 468 | |
| 469 | switch (type) { |
| 470 | case hwmon_temp: |
| 471 | return emc1403_temp_write(data, attr, channel, val); |
| 472 | case hwmon_chip: |
| 473 | return emc1403_chip_write(data, attr, val); |
| 474 | default: |
| 475 | return -EOPNOTSUPP; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | static umode_t emc1403_temp_is_visible(const void *_data, u32 attr, int channel) |
| 480 | { |
| 481 | const struct thermal_data *data = _data; |
| 482 | |
| 483 | if (data->chip == emc1402 && channel > 1) |
| 484 | return 0; |
| 485 | if (data->chip == emc1403 && channel > 2) |
| 486 | return 0; |
| 487 | |
| 488 | switch (attr) { |
| 489 | case hwmon_temp_input: |
| 490 | case hwmon_temp_min_alarm: |
| 491 | case hwmon_temp_max_alarm: |
| 492 | case hwmon_temp_crit_alarm: |
| 493 | case hwmon_temp_fault: |
| 494 | case hwmon_temp_min_hyst: |
| 495 | case hwmon_temp_max_hyst: |
| 496 | return 0444; |
| 497 | case hwmon_temp_min: |
| 498 | case hwmon_temp_max: |
| 499 | case hwmon_temp_crit: |
| 500 | return 0644; |
| 501 | case hwmon_temp_crit_hyst: |
| 502 | if (channel == 0) |
| 503 | return 0644; |
| 504 | return 0444; |
| 505 | default: |
| 506 | return 0; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | static umode_t emc1403_chip_is_visible(const void *_data, u32 attr) |
| 511 | { |
| 512 | switch (attr) { |
| 513 | case hwmon_chip_update_interval: |
| 514 | return 0644; |
| 515 | default: |
| 516 | return 0; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | static umode_t emc1403_is_visible(const void *data, enum hwmon_sensor_types type, |
| 521 | u32 attr, int channel) |
| 522 | { |
| 523 | switch (type) { |
| 524 | case hwmon_temp: |
| 525 | return emc1403_temp_is_visible(data, attr, channel); |
| 526 | case hwmon_chip: |
| 527 | return emc1403_chip_is_visible(data, attr); |
| 528 | default: |
| 529 | return 0; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | static const struct hwmon_channel_info * const emc1403_info[] = { |
| 534 | HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL), |
| 535 | HWMON_CHANNEL_INFO(temp, |
| 536 | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | |
| 537 | HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST | |
| 538 | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | |
| 539 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM, |
| 540 | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | |
| 541 | HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST | |
| 542 | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | |
| 543 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT, |
| 544 | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | |
| 545 | HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST | |
| 546 | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | |
| 547 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT, |
| 548 | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | |
| 549 | HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST | |
| 550 | HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | |
| 551 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT |
| 552 | ), |
| 553 | NULL |
| 554 | }; |
| 555 | |
| 556 | static const struct hwmon_ops emc1403_hwmon_ops = { |
| 557 | .is_visible = emc1403_is_visible, |
| 558 | .read = emc1403_read, |
| 559 | .write = emc1403_write, |
| 560 | }; |
| 561 | |
| 562 | static const struct hwmon_chip_info emc1403_chip_info = { |
| 563 | .ops = &emc1403_hwmon_ops, |
| 564 | .info = emc1403_info, |
| 565 | }; |
| 566 | |
| 567 | /* Last digit of chip name indicates number of channels */ |
| 568 | static const struct i2c_device_id emc1403_idtable[] = { |
| 569 | { "emc1402", emc1402 }, |
| 570 | { "emc1403", emc1403 }, |
| 571 | { "emc1404", emc1404 }, |
| 572 | { "emc1412", emc1402 }, |
| 573 | { "emc1413", emc1403 }, |
| 574 | { "emc1414", emc1404 }, |
| 575 | { "emc1422", emc1402 }, |
| 576 | { "emc1423", emc1403 }, |
| 577 | { "emc1424", emc1404 }, |
| 578 | { "emc1442", emc1402 }, |
| 579 | { } |
| 580 | }; |
| 581 | MODULE_DEVICE_TABLE(i2c, emc1403_idtable); |
| 582 | |
| 583 | static int emc1403_probe(struct i2c_client *client) |
| 584 | { |
| 585 | struct thermal_data *data; |
| 586 | struct device *hwmon_dev; |
| 587 | const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client); |
| 588 | |
| 589 | data = devm_kzalloc(&client->dev, sizeof(struct thermal_data), |
| 590 | GFP_KERNEL); |
| 591 | if (!data) |
| 592 | return -ENOMEM; |
| 593 | |
| 594 | data->chip = id->driver_data; |
| 595 | data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config); |
| 596 | if (IS_ERR(data->regmap)) |
| 597 | return PTR_ERR(data->regmap); |
| 598 | |
| 599 | mutex_init(&data->mutex); |
| 600 | |
| 601 | hwmon_dev = devm_hwmon_device_register_with_info(&client->dev, |
| 602 | client->name, data, |
| 603 | &emc1403_chip_info, |
| 604 | emc1403_groups); |
| 605 | return PTR_ERR_OR_ZERO(hwmon_dev); |
| 606 | } |
| 607 | |
| 608 | static const unsigned short emc1403_address_list[] = { |
| 609 | 0x18, 0x1c, 0x29, 0x3c, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END |
| 610 | }; |
| 611 | |
| 612 | static struct i2c_driver sensor_emc1403 = { |
| 613 | .class = I2C_CLASS_HWMON, |
| 614 | .driver = { |
| 615 | .name = "emc1403", |
| 616 | }, |
| 617 | .detect = emc1403_detect, |
| 618 | .probe = emc1403_probe, |
| 619 | .id_table = emc1403_idtable, |
| 620 | .address_list = emc1403_address_list, |
| 621 | }; |
| 622 | |
| 623 | module_i2c_driver(sensor_emc1403); |
| 624 | |
| 625 | MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com"); |
| 626 | MODULE_DESCRIPTION("emc1403 Thermal Driver"); |
| 627 | MODULE_LICENSE("GPL v2"); |