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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 | // SPDX-License-Identifier: GPL-2.0-only /* * emc1403.c - SMSC Thermal Driver * * Copyright (C) 2008 Intel Corp * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/sysfs.h> #include <linux/mutex.h> #include <linux/regmap.h> #define THERMAL_PID_REG 0xfd #define THERMAL_SMSC_ID_REG 0xfe #define THERMAL_REVISION_REG 0xff enum emc1403_chip { emc1402, emc1403, emc1404 }; struct thermal_data { struct regmap *regmap; struct mutex mutex; const struct attribute_group *groups[4]; }; static ssize_t temp_show(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); struct thermal_data *data = dev_get_drvdata(dev); unsigned int val; int retval; retval = regmap_read(data->regmap, sda->index, &val); if (retval < 0) return retval; return sprintf(buf, "%d000\n", val); } static ssize_t bit_show(struct device *dev, struct device_attribute *attr, char *buf) { struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr); struct thermal_data *data = dev_get_drvdata(dev); unsigned int val; int retval; retval = regmap_read(data->regmap, sda->nr, &val); if (retval < 0) return retval; return sprintf(buf, "%d\n", !!(val & sda->index)); } static ssize_t temp_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); struct thermal_data *data = dev_get_drvdata(dev); unsigned long val; int retval; if (kstrtoul(buf, 10, &val)) return -EINVAL; retval = regmap_write(data->regmap, sda->index, DIV_ROUND_CLOSEST(val, 1000)); if (retval < 0) return retval; return count; } static ssize_t bit_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr); struct thermal_data *data = dev_get_drvdata(dev); unsigned long val; int retval; if (kstrtoul(buf, 10, &val)) return -EINVAL; retval = regmap_update_bits(data->regmap, sda->nr, sda->index, val ? sda->index : 0); if (retval < 0) return retval; return count; } static ssize_t show_hyst_common(struct device *dev, struct device_attribute *attr, char *buf, bool is_min) { struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); struct thermal_data *data = dev_get_drvdata(dev); struct regmap *regmap = data->regmap; unsigned int limit; unsigned int hyst; int retval; retval = regmap_read(regmap, sda->index, &limit); if (retval < 0) return retval; retval = regmap_read(regmap, 0x21, &hyst); if (retval < 0) return retval; return sprintf(buf, "%d000\n", is_min ? limit + hyst : limit - hyst); } static ssize_t hyst_show(struct device *dev, struct device_attribute *attr, char *buf) { return show_hyst_common(dev, attr, buf, false); } static ssize_t min_hyst_show(struct device *dev, struct device_attribute *attr, char *buf) { return show_hyst_common(dev, attr, buf, true); } static ssize_t hyst_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct sensor_device_attribute *sda = to_sensor_dev_attr(attr); struct thermal_data *data = dev_get_drvdata(dev); struct regmap *regmap = data->regmap; unsigned int limit; int retval; int hyst; unsigned long val; if (kstrtoul(buf, 10, &val)) return -EINVAL; mutex_lock(&data->mutex); retval = regmap_read(regmap, sda->index, &limit); if (retval < 0) goto fail; hyst = limit * 1000 - val; hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255); retval = regmap_write(regmap, 0x21, hyst); if (retval == 0) retval = count; fail: mutex_unlock(&data->mutex); return retval; } /* * Sensors. We pass the actual i2c register to the methods. */ static SENSOR_DEVICE_ATTR_RW(temp1_min, temp, 0x06); static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, 0x05); static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, 0x20); static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0x00); static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, bit, 0x36, 0x01); static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, bit, 0x35, 0x01); static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, bit, 0x37, 0x01); static SENSOR_DEVICE_ATTR_RO(temp1_min_hyst, min_hyst, 0x06); static SENSOR_DEVICE_ATTR_RO(temp1_max_hyst, hyst, 0x05); static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, hyst, 0x20); static SENSOR_DEVICE_ATTR_RW(temp2_min, temp, 0x08); static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, 0x07); static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp, 0x19); static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 0x01); static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, bit, 0x1b, 0x02); static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, bit, 0x36, 0x02); static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, bit, 0x35, 0x02); static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, bit, 0x37, 0x02); static SENSOR_DEVICE_ATTR_RO(temp2_min_hyst, min_hyst, 0x08); static SENSOR_DEVICE_ATTR_RO(temp2_max_hyst, hyst, 0x07); static SENSOR_DEVICE_ATTR_RO(temp2_crit_hyst, hyst, 0x19); static SENSOR_DEVICE_ATTR_RW(temp3_min, temp, 0x16); static SENSOR_DEVICE_ATTR_RW(temp3_max, temp, 0x15); static SENSOR_DEVICE_ATTR_RW(temp3_crit, temp, 0x1A); static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 0x23); static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, bit, 0x1b, 0x04); static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, bit, 0x36, 0x04); static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, bit, 0x35, 0x04); static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, bit, 0x37, 0x04); static SENSOR_DEVICE_ATTR_RO(temp3_min_hyst, min_hyst, 0x16); static SENSOR_DEVICE_ATTR_RO(temp3_max_hyst, hyst, 0x15); static SENSOR_DEVICE_ATTR_RO(temp3_crit_hyst, hyst, 0x1A); static SENSOR_DEVICE_ATTR_RW(temp4_min, temp, 0x2D); static SENSOR_DEVICE_ATTR_RW(temp4_max, temp, 0x2C); static SENSOR_DEVICE_ATTR_RW(temp4_crit, temp, 0x30); static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 0x2A); static SENSOR_DEVICE_ATTR_2_RO(temp4_fault, bit, 0x1b, 0x08); static SENSOR_DEVICE_ATTR_2_RO(temp4_min_alarm, bit, 0x36, 0x08); static SENSOR_DEVICE_ATTR_2_RO(temp4_max_alarm, bit, 0x35, 0x08); static SENSOR_DEVICE_ATTR_2_RO(temp4_crit_alarm, bit, 0x37, 0x08); static SENSOR_DEVICE_ATTR_RO(temp4_min_hyst, min_hyst, 0x2D); static SENSOR_DEVICE_ATTR_RO(temp4_max_hyst, hyst, 0x2C); static SENSOR_DEVICE_ATTR_RO(temp4_crit_hyst, hyst, 0x30); static SENSOR_DEVICE_ATTR_2_RW(power_state, bit, 0x03, 0x40); static struct attribute *emc1402_attrs[] = { &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_min_hyst.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp2_min_hyst.dev_attr.attr, &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, &sensor_dev_attr_power_state.dev_attr.attr, NULL }; static const struct attribute_group emc1402_group = { .attrs = emc1402_attrs, }; static struct attribute *emc1403_attrs[] = { &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp3_min.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp3_crit.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp3_min_hyst.dev_attr.attr, &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, NULL }; static const struct attribute_group emc1403_group = { .attrs = emc1403_attrs, }; static struct attribute *emc1404_attrs[] = { &sensor_dev_attr_temp4_min.dev_attr.attr, &sensor_dev_attr_temp4_max.dev_attr.attr, &sensor_dev_attr_temp4_crit.dev_attr.attr, &sensor_dev_attr_temp4_input.dev_attr.attr, &sensor_dev_attr_temp4_fault.dev_attr.attr, &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp4_min_hyst.dev_attr.attr, &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, &sensor_dev_attr_temp4_crit_hyst.dev_attr.attr, NULL }; static const struct attribute_group emc1404_group = { .attrs = emc1404_attrs, }; /* * EMC14x2 uses a different register and different bits to report alarm and * fault status. For simplicity, provide a separate attribute group for this * chip series. * Since we can not re-use the same attribute names, create a separate attribute * array. */ static struct sensor_device_attribute_2 emc1402_alarms[] = { SENSOR_ATTR_2_RO(temp1_min_alarm, bit, 0x02, 0x20), SENSOR_ATTR_2_RO(temp1_max_alarm, bit, 0x02, 0x40), SENSOR_ATTR_2_RO(temp1_crit_alarm, bit, 0x02, 0x01), SENSOR_ATTR_2_RO(temp2_fault, bit, 0x02, 0x04), SENSOR_ATTR_2_RO(temp2_min_alarm, bit, 0x02, 0x08), SENSOR_ATTR_2_RO(temp2_max_alarm, bit, 0x02, 0x10), SENSOR_ATTR_2_RO(temp2_crit_alarm, bit, 0x02, 0x02), }; static struct attribute *emc1402_alarm_attrs[] = { &emc1402_alarms[0].dev_attr.attr, &emc1402_alarms[1].dev_attr.attr, &emc1402_alarms[2].dev_attr.attr, &emc1402_alarms[3].dev_attr.attr, &emc1402_alarms[4].dev_attr.attr, &emc1402_alarms[5].dev_attr.attr, &emc1402_alarms[6].dev_attr.attr, NULL, }; static const struct attribute_group emc1402_alarm_group = { .attrs = emc1402_alarm_attrs, }; static int emc1403_detect(struct i2c_client *client, struct i2c_board_info *info) { int id; /* Check if thermal chip is SMSC and EMC1403 or EMC1423 */ id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG); if (id != 0x5d) return -ENODEV; id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG); switch (id) { case 0x20: strscpy(info->type, "emc1402", I2C_NAME_SIZE); break; case 0x21: strscpy(info->type, "emc1403", I2C_NAME_SIZE); break; case 0x22: strscpy(info->type, "emc1422", I2C_NAME_SIZE); break; case 0x23: strscpy(info->type, "emc1423", I2C_NAME_SIZE); break; case 0x25: strscpy(info->type, "emc1404", I2C_NAME_SIZE); break; case 0x27: strscpy(info->type, "emc1424", I2C_NAME_SIZE); break; default: return -ENODEV; } id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG); if (id < 0x01 || id > 0x04) return -ENODEV; return 0; } static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg) { switch (reg) { case 0x00: /* internal diode high byte */ case 0x01: /* external diode 1 high byte */ case 0x02: /* status */ case 0x10: /* external diode 1 low byte */ case 0x1b: /* external diode fault */ case 0x23: /* external diode 2 high byte */ case 0x24: /* external diode 2 low byte */ case 0x29: /* internal diode low byte */ case 0x2a: /* externl diode 3 high byte */ case 0x2b: /* external diode 3 low byte */ case 0x35: /* high limit status */ case 0x36: /* low limit status */ case 0x37: /* therm limit status */ return true; default: return false; } } static const struct regmap_config emc1403_regmap_config = { .reg_bits = 8, .val_bits = 8, .cache_type = REGCACHE_RBTREE, .volatile_reg = emc1403_regmap_is_volatile, }; static const struct i2c_device_id emc1403_idtable[]; static int emc1403_probe(struct i2c_client *client) { struct thermal_data *data; struct device *hwmon_dev; const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client); data = devm_kzalloc(&client->dev, sizeof(struct thermal_data), GFP_KERNEL); if (data == NULL) return -ENOMEM; data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config); if (IS_ERR(data->regmap)) return PTR_ERR(data->regmap); mutex_init(&data->mutex); switch (id->driver_data) { case emc1404: data->groups[2] = &emc1404_group; fallthrough; case emc1403: data->groups[1] = &emc1403_group; fallthrough; case emc1402: data->groups[0] = &emc1402_group; } if (id->driver_data == emc1402) data->groups[1] = &emc1402_alarm_group; hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev, client->name, data, data->groups); if (IS_ERR(hwmon_dev)) return PTR_ERR(hwmon_dev); dev_info(&client->dev, "%s Thermal chip found\n", id->name); return 0; } static const unsigned short emc1403_address_list[] = { 0x18, 0x1c, 0x29, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END }; /* Last digit of chip name indicates number of channels */ static const struct i2c_device_id emc1403_idtable[] = { { "emc1402", emc1402 }, { "emc1403", emc1403 }, { "emc1404", emc1404 }, { "emc1412", emc1402 }, { "emc1413", emc1403 }, { "emc1414", emc1404 }, { "emc1422", emc1402 }, { "emc1423", emc1403 }, { "emc1424", emc1404 }, { } }; MODULE_DEVICE_TABLE(i2c, emc1403_idtable); static struct i2c_driver sensor_emc1403 = { .class = I2C_CLASS_HWMON, .driver = { .name = "emc1403", }, .detect = emc1403_detect, .probe_new = emc1403_probe, .id_table = emc1403_idtable, .address_list = emc1403_address_list, }; module_i2c_driver(sensor_emc1403); MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com"); MODULE_DESCRIPTION("emc1403 Thermal Driver"); MODULE_LICENSE("GPL v2"); |