1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net> 4 * 5 * based on max1668.c 6 * Copyright (c) 2011 David George <david.george@ska.ac.za> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/init.h> 11 #include <linux/slab.h> 12 #include <linux/jiffies.h> 13 #include <linux/i2c.h> 14 #include <linux/hwmon.h> 15 #include <linux/hwmon-sysfs.h> 16 #include <linux/err.h> 17 #include <linux/mutex.h> 18 #include <linux/of_device.h> 19 #include <linux/of.h> 20 21 #include <linux/platform_data/max6697.h> 22 23 enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, 24 max6697, max6698, max6699 }; 25 26 /* Report local sensor as temp1 */ 27 28 static const u8 MAX6697_REG_TEMP[] = { 29 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; 30 static const u8 MAX6697_REG_TEMP_EXT[] = { 31 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; 32 static const u8 MAX6697_REG_MAX[] = { 33 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; 34 static const u8 MAX6697_REG_CRIT[] = { 35 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; 36 37 /* 38 * Map device tree / platform data register bit map to chip bit map. 39 * Applies to alert register and over-temperature register. 40 */ 41 #define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ 42 (((reg) & 0x01) << 6) | ((reg) & 0x80)) 43 44 #define MAX6697_REG_STAT(n) (0x44 + (n)) 45 46 #define MAX6697_REG_CONFIG 0x41 47 #define MAX6581_CONF_EXTENDED (1 << 1) 48 #define MAX6693_CONF_BETA (1 << 2) 49 #define MAX6697_CONF_RESISTANCE (1 << 3) 50 #define MAX6697_CONF_TIMEOUT (1 << 5) 51 #define MAX6697_REG_ALERT_MASK 0x42 52 #define MAX6697_REG_OVERT_MASK 0x43 53 54 #define MAX6581_REG_RESISTANCE 0x4a 55 #define MAX6581_REG_IDEALITY 0x4b 56 #define MAX6581_REG_IDEALITY_SELECT 0x4c 57 #define MAX6581_REG_OFFSET 0x4d 58 #define MAX6581_REG_OFFSET_SELECT 0x4e 59 60 #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ 61 62 struct max6697_chip_data { 63 int channels; 64 u32 have_ext; 65 u32 have_crit; 66 u32 have_fault; 67 u8 valid_conf; 68 const u8 *alarm_map; 69 }; 70 71 struct max6697_data { 72 struct i2c_client *client; 73 74 enum chips type; 75 const struct max6697_chip_data *chip; 76 77 int update_interval; /* in milli-seconds */ 78 int temp_offset; /* in degrees C */ 79 80 struct mutex update_lock; 81 unsigned long last_updated; /* In jiffies */ 82 bool valid; /* true if following fields are valid */ 83 84 /* 1x local and up to 7x remote */ 85 u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ 86 #define MAX6697_TEMP_INPUT 0 87 #define MAX6697_TEMP_EXT 1 88 #define MAX6697_TEMP_MAX 2 89 #define MAX6697_TEMP_CRIT 3 90 u32 alarms; 91 }; 92 93 /* Diode fault status bits on MAX6581 are right shifted by one bit */ 94 static const u8 max6581_alarm_map[] = { 95 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 96 16, 17, 18, 19, 20, 21, 22, 23 }; 97 98 static const struct max6697_chip_data max6697_chip_data[] = { 99 [max6581] = { 100 .channels = 8, 101 .have_crit = 0xff, 102 .have_ext = 0x7f, 103 .have_fault = 0xfe, 104 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, 105 .alarm_map = max6581_alarm_map, 106 }, 107 [max6602] = { 108 .channels = 5, 109 .have_crit = 0x12, 110 .have_ext = 0x02, 111 .have_fault = 0x1e, 112 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 113 }, 114 [max6622] = { 115 .channels = 5, 116 .have_crit = 0x12, 117 .have_ext = 0x02, 118 .have_fault = 0x1e, 119 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 120 }, 121 [max6636] = { 122 .channels = 7, 123 .have_crit = 0x72, 124 .have_ext = 0x02, 125 .have_fault = 0x7e, 126 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 127 }, 128 [max6689] = { 129 .channels = 7, 130 .have_crit = 0x72, 131 .have_ext = 0x02, 132 .have_fault = 0x7e, 133 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 134 }, 135 [max6693] = { 136 .channels = 7, 137 .have_crit = 0x72, 138 .have_ext = 0x02, 139 .have_fault = 0x7e, 140 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | 141 MAX6697_CONF_TIMEOUT, 142 }, 143 [max6694] = { 144 .channels = 5, 145 .have_crit = 0x12, 146 .have_ext = 0x02, 147 .have_fault = 0x1e, 148 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | 149 MAX6697_CONF_TIMEOUT, 150 }, 151 [max6697] = { 152 .channels = 7, 153 .have_crit = 0x72, 154 .have_ext = 0x02, 155 .have_fault = 0x7e, 156 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 157 }, 158 [max6698] = { 159 .channels = 7, 160 .have_crit = 0x72, 161 .have_ext = 0x02, 162 .have_fault = 0x0e, 163 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 164 }, 165 [max6699] = { 166 .channels = 5, 167 .have_crit = 0x12, 168 .have_ext = 0x02, 169 .have_fault = 0x1e, 170 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 171 }, 172 }; 173 174 static struct max6697_data *max6697_update_device(struct device *dev) 175 { 176 struct max6697_data *data = dev_get_drvdata(dev); 177 struct i2c_client *client = data->client; 178 struct max6697_data *ret = data; 179 int val; 180 int i; 181 u32 alarms; 182 183 mutex_lock(&data->update_lock); 184 185 if (data->valid && 186 !time_after(jiffies, data->last_updated 187 + msecs_to_jiffies(data->update_interval))) 188 goto abort; 189 190 for (i = 0; i < data->chip->channels; i++) { 191 if (data->chip->have_ext & (1 << i)) { 192 val = i2c_smbus_read_byte_data(client, 193 MAX6697_REG_TEMP_EXT[i]); 194 if (unlikely(val < 0)) { 195 ret = ERR_PTR(val); 196 goto abort; 197 } 198 data->temp[i][MAX6697_TEMP_EXT] = val; 199 } 200 201 val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); 202 if (unlikely(val < 0)) { 203 ret = ERR_PTR(val); 204 goto abort; 205 } 206 data->temp[i][MAX6697_TEMP_INPUT] = val; 207 208 val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); 209 if (unlikely(val < 0)) { 210 ret = ERR_PTR(val); 211 goto abort; 212 } 213 data->temp[i][MAX6697_TEMP_MAX] = val; 214 215 if (data->chip->have_crit & (1 << i)) { 216 val = i2c_smbus_read_byte_data(client, 217 MAX6697_REG_CRIT[i]); 218 if (unlikely(val < 0)) { 219 ret = ERR_PTR(val); 220 goto abort; 221 } 222 data->temp[i][MAX6697_TEMP_CRIT] = val; 223 } 224 } 225 226 alarms = 0; 227 for (i = 0; i < 3; i++) { 228 val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); 229 if (unlikely(val < 0)) { 230 ret = ERR_PTR(val); 231 goto abort; 232 } 233 alarms = (alarms << 8) | val; 234 } 235 data->alarms = alarms; 236 data->last_updated = jiffies; 237 data->valid = true; 238 abort: 239 mutex_unlock(&data->update_lock); 240 241 return ret; 242 } 243 244 static ssize_t temp_input_show(struct device *dev, 245 struct device_attribute *devattr, char *buf) 246 { 247 int index = to_sensor_dev_attr(devattr)->index; 248 struct max6697_data *data = max6697_update_device(dev); 249 int temp; 250 251 if (IS_ERR(data)) 252 return PTR_ERR(data); 253 254 temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; 255 temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; 256 257 return sprintf(buf, "%d\n", temp * 125); 258 } 259 260 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, 261 char *buf) 262 { 263 int nr = to_sensor_dev_attr_2(devattr)->nr; 264 int index = to_sensor_dev_attr_2(devattr)->index; 265 struct max6697_data *data = max6697_update_device(dev); 266 int temp; 267 268 if (IS_ERR(data)) 269 return PTR_ERR(data); 270 271 temp = data->temp[nr][index]; 272 temp -= data->temp_offset; 273 274 return sprintf(buf, "%d\n", temp * 1000); 275 } 276 277 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 278 char *buf) 279 { 280 int index = to_sensor_dev_attr(attr)->index; 281 struct max6697_data *data = max6697_update_device(dev); 282 283 if (IS_ERR(data)) 284 return PTR_ERR(data); 285 286 if (data->chip->alarm_map) 287 index = data->chip->alarm_map[index]; 288 289 return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); 290 } 291 292 static ssize_t temp_store(struct device *dev, 293 struct device_attribute *devattr, const char *buf, 294 size_t count) 295 { 296 int nr = to_sensor_dev_attr_2(devattr)->nr; 297 int index = to_sensor_dev_attr_2(devattr)->index; 298 struct max6697_data *data = dev_get_drvdata(dev); 299 long temp; 300 int ret; 301 302 ret = kstrtol(buf, 10, &temp); 303 if (ret < 0) 304 return ret; 305 306 mutex_lock(&data->update_lock); 307 temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; 308 temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); 309 data->temp[nr][index] = temp; 310 ret = i2c_smbus_write_byte_data(data->client, 311 index == 2 ? MAX6697_REG_MAX[nr] 312 : MAX6697_REG_CRIT[nr], 313 temp); 314 mutex_unlock(&data->update_lock); 315 316 return ret < 0 ? ret : count; 317 } 318 319 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); 320 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); 321 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); 322 323 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); 324 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); 325 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); 326 327 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); 328 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); 329 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); 330 331 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); 332 static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); 333 static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); 334 335 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); 336 static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); 337 static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); 338 339 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); 340 static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); 341 static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); 342 343 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); 344 static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); 345 static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); 346 347 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); 348 static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); 349 static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); 350 351 static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); 352 static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); 353 static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); 354 static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); 355 static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); 356 static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); 357 static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); 358 static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); 359 360 static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); 361 static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); 362 static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); 363 static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); 364 static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); 365 static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); 366 static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); 367 static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); 368 369 static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); 370 static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); 371 static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); 372 static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); 373 static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); 374 static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); 375 static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); 376 377 static DEVICE_ATTR(dummy, 0, NULL, NULL); 378 379 static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, 380 int index) 381 { 382 struct device *dev = container_of(kobj, struct device, kobj); 383 struct max6697_data *data = dev_get_drvdata(dev); 384 const struct max6697_chip_data *chip = data->chip; 385 int channel = index / 6; /* channel number */ 386 int nr = index % 6; /* attribute index within channel */ 387 388 if (channel >= chip->channels) 389 return 0; 390 391 if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) 392 return 0; 393 if (nr == 5 && !(chip->have_fault & (1 << channel))) 394 return 0; 395 396 return attr->mode; 397 } 398 399 /* 400 * max6697_is_visible uses the index into the following array to determine 401 * if attributes should be created or not. Any change in order or content 402 * must be matched in max6697_is_visible. 403 */ 404 static struct attribute *max6697_attributes[] = { 405 &sensor_dev_attr_temp1_input.dev_attr.attr, 406 &sensor_dev_attr_temp1_max.dev_attr.attr, 407 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 408 &sensor_dev_attr_temp1_crit.dev_attr.attr, 409 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 410 &dev_attr_dummy.attr, 411 412 &sensor_dev_attr_temp2_input.dev_attr.attr, 413 &sensor_dev_attr_temp2_max.dev_attr.attr, 414 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 415 &sensor_dev_attr_temp2_crit.dev_attr.attr, 416 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 417 &sensor_dev_attr_temp2_fault.dev_attr.attr, 418 419 &sensor_dev_attr_temp3_input.dev_attr.attr, 420 &sensor_dev_attr_temp3_max.dev_attr.attr, 421 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, 422 &sensor_dev_attr_temp3_crit.dev_attr.attr, 423 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, 424 &sensor_dev_attr_temp3_fault.dev_attr.attr, 425 426 &sensor_dev_attr_temp4_input.dev_attr.attr, 427 &sensor_dev_attr_temp4_max.dev_attr.attr, 428 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, 429 &sensor_dev_attr_temp4_crit.dev_attr.attr, 430 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, 431 &sensor_dev_attr_temp4_fault.dev_attr.attr, 432 433 &sensor_dev_attr_temp5_input.dev_attr.attr, 434 &sensor_dev_attr_temp5_max.dev_attr.attr, 435 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, 436 &sensor_dev_attr_temp5_crit.dev_attr.attr, 437 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, 438 &sensor_dev_attr_temp5_fault.dev_attr.attr, 439 440 &sensor_dev_attr_temp6_input.dev_attr.attr, 441 &sensor_dev_attr_temp6_max.dev_attr.attr, 442 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, 443 &sensor_dev_attr_temp6_crit.dev_attr.attr, 444 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, 445 &sensor_dev_attr_temp6_fault.dev_attr.attr, 446 447 &sensor_dev_attr_temp7_input.dev_attr.attr, 448 &sensor_dev_attr_temp7_max.dev_attr.attr, 449 &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, 450 &sensor_dev_attr_temp7_crit.dev_attr.attr, 451 &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, 452 &sensor_dev_attr_temp7_fault.dev_attr.attr, 453 454 &sensor_dev_attr_temp8_input.dev_attr.attr, 455 &sensor_dev_attr_temp8_max.dev_attr.attr, 456 &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, 457 &sensor_dev_attr_temp8_crit.dev_attr.attr, 458 &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, 459 &sensor_dev_attr_temp8_fault.dev_attr.attr, 460 NULL 461 }; 462 463 static const struct attribute_group max6697_group = { 464 .attrs = max6697_attributes, .is_visible = max6697_is_visible, 465 }; 466 __ATTRIBUTE_GROUPS(max6697); 467 468 static void max6697_get_config_of(struct device_node *node, 469 struct max6697_platform_data *pdata) 470 { 471 int len; 472 const __be32 *prop; 473 474 pdata->smbus_timeout_disable = 475 of_property_read_bool(node, "smbus-timeout-disable"); 476 pdata->extended_range_enable = 477 of_property_read_bool(node, "extended-range-enable"); 478 pdata->beta_compensation = 479 of_property_read_bool(node, "beta-compensation-enable"); 480 481 prop = of_get_property(node, "alert-mask", &len); 482 if (prop && len == sizeof(u32)) 483 pdata->alert_mask = be32_to_cpu(prop[0]); 484 prop = of_get_property(node, "over-temperature-mask", &len); 485 if (prop && len == sizeof(u32)) 486 pdata->over_temperature_mask = be32_to_cpu(prop[0]); 487 prop = of_get_property(node, "resistance-cancellation", &len); 488 if (prop) { 489 if (len == sizeof(u32)) 490 pdata->resistance_cancellation = be32_to_cpu(prop[0]); 491 else 492 pdata->resistance_cancellation = 0xfe; 493 } 494 prop = of_get_property(node, "transistor-ideality", &len); 495 if (prop && len == 2 * sizeof(u32)) { 496 pdata->ideality_mask = be32_to_cpu(prop[0]); 497 pdata->ideality_value = be32_to_cpu(prop[1]); 498 } 499 } 500 501 static int max6697_init_chip(struct max6697_data *data, 502 struct i2c_client *client) 503 { 504 struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); 505 struct max6697_platform_data p; 506 const struct max6697_chip_data *chip = data->chip; 507 int factor = chip->channels; 508 int ret, reg; 509 510 /* 511 * Don't touch configuration if neither platform data nor OF 512 * configuration was specified. If that is the case, use the 513 * current chip configuration. 514 */ 515 if (!pdata && !client->dev.of_node) { 516 reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); 517 if (reg < 0) 518 return reg; 519 if (data->type == max6581) { 520 if (reg & MAX6581_CONF_EXTENDED) 521 data->temp_offset = 64; 522 reg = i2c_smbus_read_byte_data(client, 523 MAX6581_REG_RESISTANCE); 524 if (reg < 0) 525 return reg; 526 factor += hweight8(reg); 527 } else { 528 if (reg & MAX6697_CONF_RESISTANCE) 529 factor++; 530 } 531 goto done; 532 } 533 534 if (client->dev.of_node) { 535 memset(&p, 0, sizeof(p)); 536 max6697_get_config_of(client->dev.of_node, &p); 537 pdata = &p; 538 } 539 540 reg = 0; 541 if (pdata->smbus_timeout_disable && 542 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { 543 reg |= MAX6697_CONF_TIMEOUT; 544 } 545 if (pdata->extended_range_enable && 546 (chip->valid_conf & MAX6581_CONF_EXTENDED)) { 547 reg |= MAX6581_CONF_EXTENDED; 548 data->temp_offset = 64; 549 } 550 if (pdata->resistance_cancellation && 551 (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { 552 reg |= MAX6697_CONF_RESISTANCE; 553 factor++; 554 } 555 if (pdata->beta_compensation && 556 (chip->valid_conf & MAX6693_CONF_BETA)) { 557 reg |= MAX6693_CONF_BETA; 558 } 559 560 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); 561 if (ret < 0) 562 return ret; 563 564 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, 565 MAX6697_MAP_BITS(pdata->alert_mask)); 566 if (ret < 0) 567 return ret; 568 569 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, 570 MAX6697_MAP_BITS(pdata->over_temperature_mask)); 571 if (ret < 0) 572 return ret; 573 574 if (data->type == max6581) { 575 factor += hweight8(pdata->resistance_cancellation >> 1); 576 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, 577 pdata->resistance_cancellation >> 1); 578 if (ret < 0) 579 return ret; 580 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, 581 pdata->ideality_value); 582 if (ret < 0) 583 return ret; 584 ret = i2c_smbus_write_byte_data(client, 585 MAX6581_REG_IDEALITY_SELECT, 586 pdata->ideality_mask >> 1); 587 if (ret < 0) 588 return ret; 589 } 590 done: 591 data->update_interval = factor * MAX6697_CONV_TIME; 592 return 0; 593 } 594 595 static int max6697_probe(struct i2c_client *client, 596 const struct i2c_device_id *id) 597 { 598 struct i2c_adapter *adapter = client->adapter; 599 struct device *dev = &client->dev; 600 struct max6697_data *data; 601 struct device *hwmon_dev; 602 int err; 603 604 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 605 return -ENODEV; 606 607 data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); 608 if (!data) 609 return -ENOMEM; 610 611 if (client->dev.of_node) 612 data->type = (enum chips)of_device_get_match_data(&client->dev); 613 else 614 data->type = id->driver_data; 615 data->chip = &max6697_chip_data[data->type]; 616 data->client = client; 617 mutex_init(&data->update_lock); 618 619 err = max6697_init_chip(data, client); 620 if (err) 621 return err; 622 623 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 624 data, 625 max6697_groups); 626 return PTR_ERR_OR_ZERO(hwmon_dev); 627 } 628 629 static const struct i2c_device_id max6697_id[] = { 630 { "max6581", max6581 }, 631 { "max6602", max6602 }, 632 { "max6622", max6622 }, 633 { "max6636", max6636 }, 634 { "max6689", max6689 }, 635 { "max6693", max6693 }, 636 { "max6694", max6694 }, 637 { "max6697", max6697 }, 638 { "max6698", max6698 }, 639 { "max6699", max6699 }, 640 { } 641 }; 642 MODULE_DEVICE_TABLE(i2c, max6697_id); 643 644 static const struct of_device_id __maybe_unused max6697_of_match[] = { 645 { 646 .compatible = "maxim,max6581", 647 .data = (void *)max6581 648 }, 649 { 650 .compatible = "maxim,max6602", 651 .data = (void *)max6602 652 }, 653 { 654 .compatible = "maxim,max6622", 655 .data = (void *)max6622 656 }, 657 { 658 .compatible = "maxim,max6636", 659 .data = (void *)max6636 660 }, 661 { 662 .compatible = "maxim,max6689", 663 .data = (void *)max6689 664 }, 665 { 666 .compatible = "maxim,max6693", 667 .data = (void *)max6693 668 }, 669 { 670 .compatible = "maxim,max6694", 671 .data = (void *)max6694 672 }, 673 { 674 .compatible = "maxim,max6697", 675 .data = (void *)max6697 676 }, 677 { 678 .compatible = "maxim,max6698", 679 .data = (void *)max6698 680 }, 681 { 682 .compatible = "maxim,max6699", 683 .data = (void *)max6699 684 }, 685 { }, 686 }; 687 MODULE_DEVICE_TABLE(of, max6697_of_match); 688 689 static struct i2c_driver max6697_driver = { 690 .class = I2C_CLASS_HWMON, 691 .driver = { 692 .name = "max6697", 693 .of_match_table = of_match_ptr(max6697_of_match), 694 }, 695 .probe = max6697_probe, 696 .id_table = max6697_id, 697 }; 698 699 module_i2c_driver(max6697_driver); 700 701 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 702 MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); 703 MODULE_LICENSE("GPL"); 704