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_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ 42 (((reg) & 0x01) << 6) | ((reg) & 0x80)) 43 #define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7)) 44 45 #define MAX6697_REG_STAT(n) (0x44 + (n)) 46 47 #define MAX6697_REG_CONFIG 0x41 48 #define MAX6581_CONF_EXTENDED (1 << 1) 49 #define MAX6693_CONF_BETA (1 << 2) 50 #define MAX6697_CONF_RESISTANCE (1 << 3) 51 #define MAX6697_CONF_TIMEOUT (1 << 5) 52 #define MAX6697_REG_ALERT_MASK 0x42 53 #define MAX6697_REG_OVERT_MASK 0x43 54 55 #define MAX6581_REG_RESISTANCE 0x4a 56 #define MAX6581_REG_IDEALITY 0x4b 57 #define MAX6581_REG_IDEALITY_SELECT 0x4c 58 #define MAX6581_REG_OFFSET 0x4d 59 #define MAX6581_REG_OFFSET_SELECT 0x4e 60 61 #define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ 62 63 struct max6697_chip_data { 64 int channels; 65 u32 have_ext; 66 u32 have_crit; 67 u32 have_fault; 68 u8 valid_conf; 69 const u8 *alarm_map; 70 }; 71 72 struct max6697_data { 73 struct i2c_client *client; 74 75 enum chips type; 76 const struct max6697_chip_data *chip; 77 78 int update_interval; /* in milli-seconds */ 79 int temp_offset; /* in degrees C */ 80 81 struct mutex update_lock; 82 unsigned long last_updated; /* In jiffies */ 83 bool valid; /* true if following fields are valid */ 84 85 /* 1x local and up to 7x remote */ 86 u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ 87 #define MAX6697_TEMP_INPUT 0 88 #define MAX6697_TEMP_EXT 1 89 #define MAX6697_TEMP_MAX 2 90 #define MAX6697_TEMP_CRIT 3 91 u32 alarms; 92 }; 93 94 /* Diode fault status bits on MAX6581 are right shifted by one bit */ 95 static const u8 max6581_alarm_map[] = { 96 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 97 16, 17, 18, 19, 20, 21, 22, 23 }; 98 99 static const struct max6697_chip_data max6697_chip_data[] = { 100 [max6581] = { 101 .channels = 8, 102 .have_crit = 0xff, 103 .have_ext = 0x7f, 104 .have_fault = 0xfe, 105 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, 106 .alarm_map = max6581_alarm_map, 107 }, 108 [max6602] = { 109 .channels = 5, 110 .have_crit = 0x12, 111 .have_ext = 0x02, 112 .have_fault = 0x1e, 113 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 114 }, 115 [max6622] = { 116 .channels = 5, 117 .have_crit = 0x12, 118 .have_ext = 0x02, 119 .have_fault = 0x1e, 120 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 121 }, 122 [max6636] = { 123 .channels = 7, 124 .have_crit = 0x72, 125 .have_ext = 0x02, 126 .have_fault = 0x7e, 127 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 128 }, 129 [max6689] = { 130 .channels = 7, 131 .have_crit = 0x72, 132 .have_ext = 0x02, 133 .have_fault = 0x7e, 134 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 135 }, 136 [max6693] = { 137 .channels = 7, 138 .have_crit = 0x72, 139 .have_ext = 0x02, 140 .have_fault = 0x7e, 141 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | 142 MAX6697_CONF_TIMEOUT, 143 }, 144 [max6694] = { 145 .channels = 5, 146 .have_crit = 0x12, 147 .have_ext = 0x02, 148 .have_fault = 0x1e, 149 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | 150 MAX6697_CONF_TIMEOUT, 151 }, 152 [max6697] = { 153 .channels = 7, 154 .have_crit = 0x72, 155 .have_ext = 0x02, 156 .have_fault = 0x7e, 157 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 158 }, 159 [max6698] = { 160 .channels = 7, 161 .have_crit = 0x72, 162 .have_ext = 0x02, 163 .have_fault = 0x0e, 164 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 165 }, 166 [max6699] = { 167 .channels = 5, 168 .have_crit = 0x12, 169 .have_ext = 0x02, 170 .have_fault = 0x1e, 171 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 172 }, 173 }; 174 175 static struct max6697_data *max6697_update_device(struct device *dev) 176 { 177 struct max6697_data *data = dev_get_drvdata(dev); 178 struct i2c_client *client = data->client; 179 struct max6697_data *ret = data; 180 int val; 181 int i; 182 u32 alarms; 183 184 mutex_lock(&data->update_lock); 185 186 if (data->valid && 187 !time_after(jiffies, data->last_updated 188 + msecs_to_jiffies(data->update_interval))) 189 goto abort; 190 191 for (i = 0; i < data->chip->channels; i++) { 192 if (data->chip->have_ext & (1 << i)) { 193 val = i2c_smbus_read_byte_data(client, 194 MAX6697_REG_TEMP_EXT[i]); 195 if (unlikely(val < 0)) { 196 ret = ERR_PTR(val); 197 goto abort; 198 } 199 data->temp[i][MAX6697_TEMP_EXT] = val; 200 } 201 202 val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); 203 if (unlikely(val < 0)) { 204 ret = ERR_PTR(val); 205 goto abort; 206 } 207 data->temp[i][MAX6697_TEMP_INPUT] = val; 208 209 val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); 210 if (unlikely(val < 0)) { 211 ret = ERR_PTR(val); 212 goto abort; 213 } 214 data->temp[i][MAX6697_TEMP_MAX] = val; 215 216 if (data->chip->have_crit & (1 << i)) { 217 val = i2c_smbus_read_byte_data(client, 218 MAX6697_REG_CRIT[i]); 219 if (unlikely(val < 0)) { 220 ret = ERR_PTR(val); 221 goto abort; 222 } 223 data->temp[i][MAX6697_TEMP_CRIT] = val; 224 } 225 } 226 227 alarms = 0; 228 for (i = 0; i < 3; i++) { 229 val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); 230 if (unlikely(val < 0)) { 231 ret = ERR_PTR(val); 232 goto abort; 233 } 234 alarms = (alarms << 8) | val; 235 } 236 data->alarms = alarms; 237 data->last_updated = jiffies; 238 data->valid = true; 239 abort: 240 mutex_unlock(&data->update_lock); 241 242 return ret; 243 } 244 245 static ssize_t temp_input_show(struct device *dev, 246 struct device_attribute *devattr, char *buf) 247 { 248 int index = to_sensor_dev_attr(devattr)->index; 249 struct max6697_data *data = max6697_update_device(dev); 250 int temp; 251 252 if (IS_ERR(data)) 253 return PTR_ERR(data); 254 255 temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; 256 temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; 257 258 return sprintf(buf, "%d\n", temp * 125); 259 } 260 261 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, 262 char *buf) 263 { 264 int nr = to_sensor_dev_attr_2(devattr)->nr; 265 int index = to_sensor_dev_attr_2(devattr)->index; 266 struct max6697_data *data = max6697_update_device(dev); 267 int temp; 268 269 if (IS_ERR(data)) 270 return PTR_ERR(data); 271 272 temp = data->temp[nr][index]; 273 temp -= data->temp_offset; 274 275 return sprintf(buf, "%d\n", temp * 1000); 276 } 277 278 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 279 char *buf) 280 { 281 int index = to_sensor_dev_attr(attr)->index; 282 struct max6697_data *data = max6697_update_device(dev); 283 284 if (IS_ERR(data)) 285 return PTR_ERR(data); 286 287 if (data->chip->alarm_map) 288 index = data->chip->alarm_map[index]; 289 290 return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); 291 } 292 293 static ssize_t temp_store(struct device *dev, 294 struct device_attribute *devattr, const char *buf, 295 size_t count) 296 { 297 int nr = to_sensor_dev_attr_2(devattr)->nr; 298 int index = to_sensor_dev_attr_2(devattr)->index; 299 struct max6697_data *data = dev_get_drvdata(dev); 300 long temp; 301 int ret; 302 303 ret = kstrtol(buf, 10, &temp); 304 if (ret < 0) 305 return ret; 306 307 mutex_lock(&data->update_lock); 308 temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; 309 temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); 310 data->temp[nr][index] = temp; 311 ret = i2c_smbus_write_byte_data(data->client, 312 index == 2 ? MAX6697_REG_MAX[nr] 313 : MAX6697_REG_CRIT[nr], 314 temp); 315 mutex_unlock(&data->update_lock); 316 317 return ret < 0 ? ret : count; 318 } 319 320 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); 321 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); 322 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); 323 324 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); 325 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); 326 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); 327 328 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); 329 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); 330 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); 331 332 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); 333 static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); 334 static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); 335 336 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); 337 static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); 338 static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); 339 340 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); 341 static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); 342 static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); 343 344 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); 345 static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); 346 static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); 347 348 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); 349 static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); 350 static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); 351 352 static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); 353 static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); 354 static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); 355 static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); 356 static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); 357 static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); 358 static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); 359 static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); 360 361 static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); 362 static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); 363 static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); 364 static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); 365 static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); 366 static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); 367 static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); 368 static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); 369 370 static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); 371 static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); 372 static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); 373 static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); 374 static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); 375 static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); 376 static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); 377 378 static DEVICE_ATTR(dummy, 0, NULL, NULL); 379 380 static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, 381 int index) 382 { 383 struct device *dev = container_of(kobj, struct device, kobj); 384 struct max6697_data *data = dev_get_drvdata(dev); 385 const struct max6697_chip_data *chip = data->chip; 386 int channel = index / 6; /* channel number */ 387 int nr = index % 6; /* attribute index within channel */ 388 389 if (channel >= chip->channels) 390 return 0; 391 392 if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) 393 return 0; 394 if (nr == 5 && !(chip->have_fault & (1 << channel))) 395 return 0; 396 397 return attr->mode; 398 } 399 400 /* 401 * max6697_is_visible uses the index into the following array to determine 402 * if attributes should be created or not. Any change in order or content 403 * must be matched in max6697_is_visible. 404 */ 405 static struct attribute *max6697_attributes[] = { 406 &sensor_dev_attr_temp1_input.dev_attr.attr, 407 &sensor_dev_attr_temp1_max.dev_attr.attr, 408 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 409 &sensor_dev_attr_temp1_crit.dev_attr.attr, 410 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 411 &dev_attr_dummy.attr, 412 413 &sensor_dev_attr_temp2_input.dev_attr.attr, 414 &sensor_dev_attr_temp2_max.dev_attr.attr, 415 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 416 &sensor_dev_attr_temp2_crit.dev_attr.attr, 417 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 418 &sensor_dev_attr_temp2_fault.dev_attr.attr, 419 420 &sensor_dev_attr_temp3_input.dev_attr.attr, 421 &sensor_dev_attr_temp3_max.dev_attr.attr, 422 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, 423 &sensor_dev_attr_temp3_crit.dev_attr.attr, 424 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, 425 &sensor_dev_attr_temp3_fault.dev_attr.attr, 426 427 &sensor_dev_attr_temp4_input.dev_attr.attr, 428 &sensor_dev_attr_temp4_max.dev_attr.attr, 429 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, 430 &sensor_dev_attr_temp4_crit.dev_attr.attr, 431 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, 432 &sensor_dev_attr_temp4_fault.dev_attr.attr, 433 434 &sensor_dev_attr_temp5_input.dev_attr.attr, 435 &sensor_dev_attr_temp5_max.dev_attr.attr, 436 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, 437 &sensor_dev_attr_temp5_crit.dev_attr.attr, 438 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, 439 &sensor_dev_attr_temp5_fault.dev_attr.attr, 440 441 &sensor_dev_attr_temp6_input.dev_attr.attr, 442 &sensor_dev_attr_temp6_max.dev_attr.attr, 443 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, 444 &sensor_dev_attr_temp6_crit.dev_attr.attr, 445 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, 446 &sensor_dev_attr_temp6_fault.dev_attr.attr, 447 448 &sensor_dev_attr_temp7_input.dev_attr.attr, 449 &sensor_dev_attr_temp7_max.dev_attr.attr, 450 &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, 451 &sensor_dev_attr_temp7_crit.dev_attr.attr, 452 &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, 453 &sensor_dev_attr_temp7_fault.dev_attr.attr, 454 455 &sensor_dev_attr_temp8_input.dev_attr.attr, 456 &sensor_dev_attr_temp8_max.dev_attr.attr, 457 &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, 458 &sensor_dev_attr_temp8_crit.dev_attr.attr, 459 &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, 460 &sensor_dev_attr_temp8_fault.dev_attr.attr, 461 NULL 462 }; 463 464 static const struct attribute_group max6697_group = { 465 .attrs = max6697_attributes, .is_visible = max6697_is_visible, 466 }; 467 __ATTRIBUTE_GROUPS(max6697); 468 469 static void max6697_get_config_of(struct device_node *node, 470 struct max6697_platform_data *pdata) 471 { 472 int len; 473 const __be32 *prop; 474 475 pdata->smbus_timeout_disable = 476 of_property_read_bool(node, "smbus-timeout-disable"); 477 pdata->extended_range_enable = 478 of_property_read_bool(node, "extended-range-enable"); 479 pdata->beta_compensation = 480 of_property_read_bool(node, "beta-compensation-enable"); 481 482 prop = of_get_property(node, "alert-mask", &len); 483 if (prop && len == sizeof(u32)) 484 pdata->alert_mask = be32_to_cpu(prop[0]); 485 prop = of_get_property(node, "over-temperature-mask", &len); 486 if (prop && len == sizeof(u32)) 487 pdata->over_temperature_mask = be32_to_cpu(prop[0]); 488 prop = of_get_property(node, "resistance-cancellation", &len); 489 if (prop) { 490 if (len == sizeof(u32)) 491 pdata->resistance_cancellation = be32_to_cpu(prop[0]); 492 else 493 pdata->resistance_cancellation = 0xfe; 494 } 495 prop = of_get_property(node, "transistor-ideality", &len); 496 if (prop && len == 2 * sizeof(u32)) { 497 pdata->ideality_mask = be32_to_cpu(prop[0]); 498 pdata->ideality_value = be32_to_cpu(prop[1]); 499 } 500 } 501 502 static int max6697_init_chip(struct max6697_data *data, 503 struct i2c_client *client) 504 { 505 struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); 506 struct max6697_platform_data p; 507 const struct max6697_chip_data *chip = data->chip; 508 int factor = chip->channels; 509 int ret, reg; 510 511 /* 512 * Don't touch configuration if neither platform data nor OF 513 * configuration was specified. If that is the case, use the 514 * current chip configuration. 515 */ 516 if (!pdata && !client->dev.of_node) { 517 reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); 518 if (reg < 0) 519 return reg; 520 if (data->type == max6581) { 521 if (reg & MAX6581_CONF_EXTENDED) 522 data->temp_offset = 64; 523 reg = i2c_smbus_read_byte_data(client, 524 MAX6581_REG_RESISTANCE); 525 if (reg < 0) 526 return reg; 527 factor += hweight8(reg); 528 } else { 529 if (reg & MAX6697_CONF_RESISTANCE) 530 factor++; 531 } 532 goto done; 533 } 534 535 if (client->dev.of_node) { 536 memset(&p, 0, sizeof(p)); 537 max6697_get_config_of(client->dev.of_node, &p); 538 pdata = &p; 539 } 540 541 reg = 0; 542 if (pdata->smbus_timeout_disable && 543 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { 544 reg |= MAX6697_CONF_TIMEOUT; 545 } 546 if (pdata->extended_range_enable && 547 (chip->valid_conf & MAX6581_CONF_EXTENDED)) { 548 reg |= MAX6581_CONF_EXTENDED; 549 data->temp_offset = 64; 550 } 551 if (pdata->resistance_cancellation && 552 (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { 553 reg |= MAX6697_CONF_RESISTANCE; 554 factor++; 555 } 556 if (pdata->beta_compensation && 557 (chip->valid_conf & MAX6693_CONF_BETA)) { 558 reg |= MAX6693_CONF_BETA; 559 } 560 561 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); 562 if (ret < 0) 563 return ret; 564 565 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, 566 MAX6697_ALERT_MAP_BITS(pdata->alert_mask)); 567 if (ret < 0) 568 return ret; 569 570 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, 571 MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask)); 572 if (ret < 0) 573 return ret; 574 575 if (data->type == max6581) { 576 factor += hweight8(pdata->resistance_cancellation >> 1); 577 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, 578 pdata->resistance_cancellation >> 1); 579 if (ret < 0) 580 return ret; 581 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, 582 pdata->ideality_value); 583 if (ret < 0) 584 return ret; 585 ret = i2c_smbus_write_byte_data(client, 586 MAX6581_REG_IDEALITY_SELECT, 587 pdata->ideality_mask >> 1); 588 if (ret < 0) 589 return ret; 590 } 591 done: 592 data->update_interval = factor * MAX6697_CONV_TIME; 593 return 0; 594 } 595 596 static int max6697_probe(struct i2c_client *client, 597 const struct i2c_device_id *id) 598 { 599 struct i2c_adapter *adapter = client->adapter; 600 struct device *dev = &client->dev; 601 struct max6697_data *data; 602 struct device *hwmon_dev; 603 int err; 604 605 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 606 return -ENODEV; 607 608 data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); 609 if (!data) 610 return -ENOMEM; 611 612 if (client->dev.of_node) 613 data->type = (enum chips)of_device_get_match_data(&client->dev); 614 else 615 data->type = id->driver_data; 616 data->chip = &max6697_chip_data[data->type]; 617 data->client = client; 618 mutex_init(&data->update_lock); 619 620 err = max6697_init_chip(data, client); 621 if (err) 622 return err; 623 624 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 625 data, 626 max6697_groups); 627 return PTR_ERR_OR_ZERO(hwmon_dev); 628 } 629 630 static const struct i2c_device_id max6697_id[] = { 631 { "max6581", max6581 }, 632 { "max6602", max6602 }, 633 { "max6622", max6622 }, 634 { "max6636", max6636 }, 635 { "max6689", max6689 }, 636 { "max6693", max6693 }, 637 { "max6694", max6694 }, 638 { "max6697", max6697 }, 639 { "max6698", max6698 }, 640 { "max6699", max6699 }, 641 { } 642 }; 643 MODULE_DEVICE_TABLE(i2c, max6697_id); 644 645 static const struct of_device_id __maybe_unused max6697_of_match[] = { 646 { 647 .compatible = "maxim,max6581", 648 .data = (void *)max6581 649 }, 650 { 651 .compatible = "maxim,max6602", 652 .data = (void *)max6602 653 }, 654 { 655 .compatible = "maxim,max6622", 656 .data = (void *)max6622 657 }, 658 { 659 .compatible = "maxim,max6636", 660 .data = (void *)max6636 661 }, 662 { 663 .compatible = "maxim,max6689", 664 .data = (void *)max6689 665 }, 666 { 667 .compatible = "maxim,max6693", 668 .data = (void *)max6693 669 }, 670 { 671 .compatible = "maxim,max6694", 672 .data = (void *)max6694 673 }, 674 { 675 .compatible = "maxim,max6697", 676 .data = (void *)max6697 677 }, 678 { 679 .compatible = "maxim,max6698", 680 .data = (void *)max6698 681 }, 682 { 683 .compatible = "maxim,max6699", 684 .data = (void *)max6699 685 }, 686 { }, 687 }; 688 MODULE_DEVICE_TABLE(of, max6697_of_match); 689 690 static struct i2c_driver max6697_driver = { 691 .class = I2C_CLASS_HWMON, 692 .driver = { 693 .name = "max6697", 694 .of_match_table = of_match_ptr(max6697_of_match), 695 }, 696 .probe = max6697_probe, 697 .id_table = max6697_id, 698 }; 699 700 module_i2c_driver(max6697_driver); 701 702 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 703 MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); 704 MODULE_LICENSE("GPL"); 705