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.h> 19 20#include <linux/platform_data/max6697.h> 21 22enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694, 23 max6697, max6698, max6699 }; 24 25/* Report local sensor as temp1 */ 26 27static const u8 MAX6697_REG_TEMP[] = { 28 0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 }; 29static const u8 MAX6697_REG_TEMP_EXT[] = { 30 0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 }; 31static const u8 MAX6697_REG_MAX[] = { 32 0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 }; 33static const u8 MAX6697_REG_CRIT[] = { 34 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 }; 35 36/* 37 * Map device tree / platform data register bit map to chip bit map. 38 * Applies to alert register and over-temperature register. 39 */ 40#define MAX6697_ALERT_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \ 41 (((reg) & 0x01) << 6) | ((reg) & 0x80)) 42#define MAX6697_OVERT_MAP_BITS(reg) (((reg) >> 1) | (((reg) & 0x01) << 7)) 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#define MAX6581_OFFSET_MIN -31750 60#define MAX6581_OFFSET_MAX 31750 61 62#define MAX6697_CONV_TIME 156 /* ms per channel, worst case */ 63 64struct max6697_chip_data { 65 int channels; 66 u32 have_ext; 67 u32 have_crit; 68 u32 have_fault; 69 u8 valid_conf; 70 const u8 *alarm_map; 71}; 72 73struct max6697_data { 74 struct i2c_client *client; 75 76 enum chips type; 77 const struct max6697_chip_data *chip; 78 79 int update_interval; /* in milli-seconds */ 80 int temp_offset; /* in degrees C */ 81 82 struct mutex update_lock; 83 unsigned long last_updated; /* In jiffies */ 84 bool valid; /* true if following fields are valid */ 85 86 /* 1x local and up to 7x remote */ 87 u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */ 88#define MAX6697_TEMP_INPUT 0 89#define MAX6697_TEMP_EXT 1 90#define MAX6697_TEMP_MAX 2 91#define MAX6697_TEMP_CRIT 3 92 u32 alarms; 93}; 94 95/* Diode fault status bits on MAX6581 are right shifted by one bit */ 96static const u8 max6581_alarm_map[] = { 97 0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 98 16, 17, 18, 19, 20, 21, 22, 23 }; 99 100static const struct max6697_chip_data max6697_chip_data[] = { 101 [max6581] = { 102 .channels = 8, 103 .have_crit = 0xff, 104 .have_ext = 0x7f, 105 .have_fault = 0xfe, 106 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT, 107 .alarm_map = max6581_alarm_map, 108 }, 109 [max6602] = { 110 .channels = 5, 111 .have_crit = 0x12, 112 .have_ext = 0x02, 113 .have_fault = 0x1e, 114 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 115 }, 116 [max6622] = { 117 .channels = 5, 118 .have_crit = 0x12, 119 .have_ext = 0x02, 120 .have_fault = 0x1e, 121 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 122 }, 123 [max6636] = { 124 .channels = 7, 125 .have_crit = 0x72, 126 .have_ext = 0x02, 127 .have_fault = 0x7e, 128 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 129 }, 130 [max6689] = { 131 .channels = 7, 132 .have_crit = 0x72, 133 .have_ext = 0x02, 134 .have_fault = 0x7e, 135 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 136 }, 137 [max6693] = { 138 .channels = 7, 139 .have_crit = 0x72, 140 .have_ext = 0x02, 141 .have_fault = 0x7e, 142 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | 143 MAX6697_CONF_TIMEOUT, 144 }, 145 [max6694] = { 146 .channels = 5, 147 .have_crit = 0x12, 148 .have_ext = 0x02, 149 .have_fault = 0x1e, 150 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA | 151 MAX6697_CONF_TIMEOUT, 152 }, 153 [max6697] = { 154 .channels = 7, 155 .have_crit = 0x72, 156 .have_ext = 0x02, 157 .have_fault = 0x7e, 158 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 159 }, 160 [max6698] = { 161 .channels = 7, 162 .have_crit = 0x72, 163 .have_ext = 0x02, 164 .have_fault = 0x0e, 165 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 166 }, 167 [max6699] = { 168 .channels = 5, 169 .have_crit = 0x12, 170 .have_ext = 0x02, 171 .have_fault = 0x1e, 172 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT, 173 }, 174}; 175 176static inline int max6581_offset_to_millic(int val) 177{ 178 return sign_extend32(val, 7) * 250; 179} 180 181static struct max6697_data *max6697_update_device(struct device *dev) 182{ 183 struct max6697_data *data = dev_get_drvdata(dev); 184 struct i2c_client *client = data->client; 185 struct max6697_data *ret = data; 186 int val; 187 int i; 188 u32 alarms; 189 190 mutex_lock(&data->update_lock); 191 192 if (data->valid && 193 !time_after(jiffies, data->last_updated 194 + msecs_to_jiffies(data->update_interval))) 195 goto abort; 196 197 for (i = 0; i < data->chip->channels; i++) { 198 if (data->chip->have_ext & (1 << i)) { 199 val = i2c_smbus_read_byte_data(client, 200 MAX6697_REG_TEMP_EXT[i]); 201 if (unlikely(val < 0)) { 202 ret = ERR_PTR(val); 203 goto abort; 204 } 205 data->temp[i][MAX6697_TEMP_EXT] = val; 206 } 207 208 val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]); 209 if (unlikely(val < 0)) { 210 ret = ERR_PTR(val); 211 goto abort; 212 } 213 data->temp[i][MAX6697_TEMP_INPUT] = val; 214 215 val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]); 216 if (unlikely(val < 0)) { 217 ret = ERR_PTR(val); 218 goto abort; 219 } 220 data->temp[i][MAX6697_TEMP_MAX] = val; 221 222 if (data->chip->have_crit & (1 << i)) { 223 val = i2c_smbus_read_byte_data(client, 224 MAX6697_REG_CRIT[i]); 225 if (unlikely(val < 0)) { 226 ret = ERR_PTR(val); 227 goto abort; 228 } 229 data->temp[i][MAX6697_TEMP_CRIT] = val; 230 } 231 } 232 233 alarms = 0; 234 for (i = 0; i < 3; i++) { 235 val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i)); 236 if (unlikely(val < 0)) { 237 ret = ERR_PTR(val); 238 goto abort; 239 } 240 alarms = (alarms << 8) | val; 241 } 242 data->alarms = alarms; 243 data->last_updated = jiffies; 244 data->valid = true; 245abort: 246 mutex_unlock(&data->update_lock); 247 248 return ret; 249} 250 251static ssize_t temp_input_show(struct device *dev, 252 struct device_attribute *devattr, char *buf) 253{ 254 int index = to_sensor_dev_attr(devattr)->index; 255 struct max6697_data *data = max6697_update_device(dev); 256 int temp; 257 258 if (IS_ERR(data)) 259 return PTR_ERR(data); 260 261 temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3; 262 temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5; 263 264 return sprintf(buf, "%d\n", temp * 125); 265} 266 267static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, 268 char *buf) 269{ 270 int nr = to_sensor_dev_attr_2(devattr)->nr; 271 int index = to_sensor_dev_attr_2(devattr)->index; 272 struct max6697_data *data = max6697_update_device(dev); 273 int temp; 274 275 if (IS_ERR(data)) 276 return PTR_ERR(data); 277 278 temp = data->temp[nr][index]; 279 temp -= data->temp_offset; 280 281 return sprintf(buf, "%d\n", temp * 1000); 282} 283 284static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 285 char *buf) 286{ 287 int index = to_sensor_dev_attr(attr)->index; 288 struct max6697_data *data = max6697_update_device(dev); 289 290 if (IS_ERR(data)) 291 return PTR_ERR(data); 292 293 if (data->chip->alarm_map) 294 index = data->chip->alarm_map[index]; 295 296 return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1); 297} 298 299static ssize_t temp_store(struct device *dev, 300 struct device_attribute *devattr, const char *buf, 301 size_t count) 302{ 303 int nr = to_sensor_dev_attr_2(devattr)->nr; 304 int index = to_sensor_dev_attr_2(devattr)->index; 305 struct max6697_data *data = dev_get_drvdata(dev); 306 long temp; 307 int ret; 308 309 ret = kstrtol(buf, 10, &temp); 310 if (ret < 0) 311 return ret; 312 313 mutex_lock(&data->update_lock); 314 temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset; 315 temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127); 316 data->temp[nr][index] = temp; 317 ret = i2c_smbus_write_byte_data(data->client, 318 index == 2 ? MAX6697_REG_MAX[nr] 319 : MAX6697_REG_CRIT[nr], 320 temp); 321 mutex_unlock(&data->update_lock); 322 323 return ret < 0 ? ret : count; 324} 325 326static ssize_t offset_store(struct device *dev, struct device_attribute *devattr, const char *buf, 327 size_t count) 328{ 329 int val, ret, index, select; 330 struct max6697_data *data; 331 bool channel_enabled; 332 long temp; 333 334 index = to_sensor_dev_attr(devattr)->index; 335 data = dev_get_drvdata(dev); 336 ret = kstrtol(buf, 10, &temp); 337 if (ret < 0) 338 return ret; 339 340 mutex_lock(&data->update_lock); 341 select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT); 342 if (select < 0) { 343 ret = select; 344 goto abort; 345 } 346 channel_enabled = (select & (1 << (index - 1))); 347 temp = clamp_val(temp, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX); 348 val = DIV_ROUND_CLOSEST(temp, 250); 349 /* disable the offset for channel if the new offset is 0 */ 350 if (val == 0) { 351 if (channel_enabled) 352 ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT, 353 select & ~(1 << (index - 1))); 354 ret = ret < 0 ? ret : count; 355 goto abort; 356 } 357 if (!channel_enabled) { 358 ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET_SELECT, 359 select | (1 << (index - 1))); 360 if (ret < 0) 361 goto abort; 362 } 363 ret = i2c_smbus_write_byte_data(data->client, MAX6581_REG_OFFSET, val); 364 ret = ret < 0 ? ret : count; 365 366abort: 367 mutex_unlock(&data->update_lock); 368 return ret; 369} 370 371static ssize_t offset_show(struct device *dev, struct device_attribute *devattr, char *buf) 372{ 373 struct max6697_data *data; 374 int select, ret, index; 375 376 index = to_sensor_dev_attr(devattr)->index; 377 data = dev_get_drvdata(dev); 378 mutex_lock(&data->update_lock); 379 select = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET_SELECT); 380 if (select < 0) 381 ret = select; 382 else if (select & (1 << (index - 1))) 383 ret = i2c_smbus_read_byte_data(data->client, MAX6581_REG_OFFSET); 384 else 385 ret = 0; 386 mutex_unlock(&data->update_lock); 387 return ret < 0 ? ret : sprintf(buf, "%d\n", max6581_offset_to_millic(ret)); 388} 389 390static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0); 391static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0, MAX6697_TEMP_MAX); 392static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0, MAX6697_TEMP_CRIT); 393 394static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1); 395static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 1, MAX6697_TEMP_MAX); 396static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 1, MAX6697_TEMP_CRIT); 397 398static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2); 399static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 2, MAX6697_TEMP_MAX); 400static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 2, MAX6697_TEMP_CRIT); 401 402static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3); 403static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 3, MAX6697_TEMP_MAX); 404static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 3, MAX6697_TEMP_CRIT); 405 406static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4); 407static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 4, MAX6697_TEMP_MAX); 408static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 4, MAX6697_TEMP_CRIT); 409 410static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5); 411static SENSOR_DEVICE_ATTR_2_RW(temp6_max, temp, 5, MAX6697_TEMP_MAX); 412static SENSOR_DEVICE_ATTR_2_RW(temp6_crit, temp, 5, MAX6697_TEMP_CRIT); 413 414static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_input, 6); 415static SENSOR_DEVICE_ATTR_2_RW(temp7_max, temp, 6, MAX6697_TEMP_MAX); 416static SENSOR_DEVICE_ATTR_2_RW(temp7_crit, temp, 6, MAX6697_TEMP_CRIT); 417 418static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_input, 7); 419static SENSOR_DEVICE_ATTR_2_RW(temp8_max, temp, 7, MAX6697_TEMP_MAX); 420static SENSOR_DEVICE_ATTR_2_RW(temp8_crit, temp, 7, MAX6697_TEMP_CRIT); 421 422static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 22); 423static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 16); 424static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 17); 425static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, alarm, 18); 426static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, alarm, 19); 427static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, alarm, 20); 428static SENSOR_DEVICE_ATTR_RO(temp7_max_alarm, alarm, 21); 429static SENSOR_DEVICE_ATTR_RO(temp8_max_alarm, alarm, 23); 430 431static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14); 432static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 8); 433static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 9); 434static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, alarm, 10); 435static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, alarm, 11); 436static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, alarm, 12); 437static SENSOR_DEVICE_ATTR_RO(temp7_crit_alarm, alarm, 13); 438static SENSOR_DEVICE_ATTR_RO(temp8_crit_alarm, alarm, 15); 439 440static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 1); 441static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); 442static SENSOR_DEVICE_ATTR_RO(temp4_fault, alarm, 3); 443static SENSOR_DEVICE_ATTR_RO(temp5_fault, alarm, 4); 444static SENSOR_DEVICE_ATTR_RO(temp6_fault, alarm, 5); 445static SENSOR_DEVICE_ATTR_RO(temp7_fault, alarm, 6); 446static SENSOR_DEVICE_ATTR_RO(temp8_fault, alarm, 7); 447 448/* There is no offset for local temperature so starting from temp2 */ 449static SENSOR_DEVICE_ATTR_RW(temp2_offset, offset, 1); 450static SENSOR_DEVICE_ATTR_RW(temp3_offset, offset, 2); 451static SENSOR_DEVICE_ATTR_RW(temp4_offset, offset, 3); 452static SENSOR_DEVICE_ATTR_RW(temp5_offset, offset, 4); 453static SENSOR_DEVICE_ATTR_RW(temp6_offset, offset, 5); 454static SENSOR_DEVICE_ATTR_RW(temp7_offset, offset, 6); 455static SENSOR_DEVICE_ATTR_RW(temp8_offset, offset, 7); 456 457static DEVICE_ATTR(dummy, 0, NULL, NULL); 458 459static umode_t max6697_is_visible(struct kobject *kobj, struct attribute *attr, 460 int index) 461{ 462 struct device *dev = kobj_to_dev(kobj); 463 struct max6697_data *data = dev_get_drvdata(dev); 464 const struct max6697_chip_data *chip = data->chip; 465 int channel = index / 7; /* channel number */ 466 int nr = index % 7; /* attribute index within channel */ 467 468 if (channel >= chip->channels) 469 return 0; 470 471 if ((nr == 3 || nr == 4) && !(chip->have_crit & (1 << channel))) 472 return 0; 473 if (nr == 5 && !(chip->have_fault & (1 << channel))) 474 return 0; 475 /* offset reg is only supported on max6581 remote channels */ 476 if (nr == 6) 477 if (data->type != max6581 || channel == 0) 478 return 0; 479 480 return attr->mode; 481} 482 483/* 484 * max6697_is_visible uses the index into the following array to determine 485 * if attributes should be created or not. Any change in order or content 486 * must be matched in max6697_is_visible. 487 */ 488static struct attribute *max6697_attributes[] = { 489 &sensor_dev_attr_temp1_input.dev_attr.attr, 490 &sensor_dev_attr_temp1_max.dev_attr.attr, 491 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 492 &sensor_dev_attr_temp1_crit.dev_attr.attr, 493 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 494 &dev_attr_dummy.attr, 495 &dev_attr_dummy.attr, 496 497 &sensor_dev_attr_temp2_input.dev_attr.attr, 498 &sensor_dev_attr_temp2_max.dev_attr.attr, 499 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 500 &sensor_dev_attr_temp2_crit.dev_attr.attr, 501 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 502 &sensor_dev_attr_temp2_fault.dev_attr.attr, 503 &sensor_dev_attr_temp2_offset.dev_attr.attr, 504 505 &sensor_dev_attr_temp3_input.dev_attr.attr, 506 &sensor_dev_attr_temp3_max.dev_attr.attr, 507 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, 508 &sensor_dev_attr_temp3_crit.dev_attr.attr, 509 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, 510 &sensor_dev_attr_temp3_fault.dev_attr.attr, 511 &sensor_dev_attr_temp3_offset.dev_attr.attr, 512 513 &sensor_dev_attr_temp4_input.dev_attr.attr, 514 &sensor_dev_attr_temp4_max.dev_attr.attr, 515 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, 516 &sensor_dev_attr_temp4_crit.dev_attr.attr, 517 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, 518 &sensor_dev_attr_temp4_fault.dev_attr.attr, 519 &sensor_dev_attr_temp4_offset.dev_attr.attr, 520 521 &sensor_dev_attr_temp5_input.dev_attr.attr, 522 &sensor_dev_attr_temp5_max.dev_attr.attr, 523 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, 524 &sensor_dev_attr_temp5_crit.dev_attr.attr, 525 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, 526 &sensor_dev_attr_temp5_fault.dev_attr.attr, 527 &sensor_dev_attr_temp5_offset.dev_attr.attr, 528 529 &sensor_dev_attr_temp6_input.dev_attr.attr, 530 &sensor_dev_attr_temp6_max.dev_attr.attr, 531 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr, 532 &sensor_dev_attr_temp6_crit.dev_attr.attr, 533 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr, 534 &sensor_dev_attr_temp6_fault.dev_attr.attr, 535 &sensor_dev_attr_temp6_offset.dev_attr.attr, 536 537 &sensor_dev_attr_temp7_input.dev_attr.attr, 538 &sensor_dev_attr_temp7_max.dev_attr.attr, 539 &sensor_dev_attr_temp7_max_alarm.dev_attr.attr, 540 &sensor_dev_attr_temp7_crit.dev_attr.attr, 541 &sensor_dev_attr_temp7_crit_alarm.dev_attr.attr, 542 &sensor_dev_attr_temp7_fault.dev_attr.attr, 543 &sensor_dev_attr_temp7_offset.dev_attr.attr, 544 545 &sensor_dev_attr_temp8_input.dev_attr.attr, 546 &sensor_dev_attr_temp8_max.dev_attr.attr, 547 &sensor_dev_attr_temp8_max_alarm.dev_attr.attr, 548 &sensor_dev_attr_temp8_crit.dev_attr.attr, 549 &sensor_dev_attr_temp8_crit_alarm.dev_attr.attr, 550 &sensor_dev_attr_temp8_fault.dev_attr.attr, 551 &sensor_dev_attr_temp8_offset.dev_attr.attr, 552 NULL 553}; 554 555static const struct attribute_group max6697_group = { 556 .attrs = max6697_attributes, .is_visible = max6697_is_visible, 557}; 558__ATTRIBUTE_GROUPS(max6697); 559 560static void max6697_get_config_of(struct device_node *node, 561 struct max6697_platform_data *pdata) 562{ 563 int len; 564 const __be32 *prop; 565 566 pdata->smbus_timeout_disable = 567 of_property_read_bool(node, "smbus-timeout-disable"); 568 pdata->extended_range_enable = 569 of_property_read_bool(node, "extended-range-enable"); 570 pdata->beta_compensation = 571 of_property_read_bool(node, "beta-compensation-enable"); 572 573 prop = of_get_property(node, "alert-mask", &len); 574 if (prop && len == sizeof(u32)) 575 pdata->alert_mask = be32_to_cpu(prop[0]); 576 prop = of_get_property(node, "over-temperature-mask", &len); 577 if (prop && len == sizeof(u32)) 578 pdata->over_temperature_mask = be32_to_cpu(prop[0]); 579 prop = of_get_property(node, "resistance-cancellation", &len); 580 if (prop) { 581 if (len == sizeof(u32)) 582 pdata->resistance_cancellation = be32_to_cpu(prop[0]); 583 else 584 pdata->resistance_cancellation = 0xfe; 585 } 586 prop = of_get_property(node, "transistor-ideality", &len); 587 if (prop && len == 2 * sizeof(u32)) { 588 pdata->ideality_mask = be32_to_cpu(prop[0]); 589 pdata->ideality_value = be32_to_cpu(prop[1]); 590 } 591} 592 593static int max6697_init_chip(struct max6697_data *data, 594 struct i2c_client *client) 595{ 596 struct max6697_platform_data *pdata = dev_get_platdata(&client->dev); 597 struct max6697_platform_data p; 598 const struct max6697_chip_data *chip = data->chip; 599 int factor = chip->channels; 600 int ret, reg; 601 602 /* 603 * Don't touch configuration if neither platform data nor OF 604 * configuration was specified. If that is the case, use the 605 * current chip configuration. 606 */ 607 if (!pdata && !client->dev.of_node) { 608 reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG); 609 if (reg < 0) 610 return reg; 611 if (data->type == max6581) { 612 if (reg & MAX6581_CONF_EXTENDED) 613 data->temp_offset = 64; 614 reg = i2c_smbus_read_byte_data(client, 615 MAX6581_REG_RESISTANCE); 616 if (reg < 0) 617 return reg; 618 factor += hweight8(reg); 619 } else { 620 if (reg & MAX6697_CONF_RESISTANCE) 621 factor++; 622 } 623 goto done; 624 } 625 626 if (client->dev.of_node) { 627 memset(&p, 0, sizeof(p)); 628 max6697_get_config_of(client->dev.of_node, &p); 629 pdata = &p; 630 } 631 632 reg = 0; 633 if (pdata->smbus_timeout_disable && 634 (chip->valid_conf & MAX6697_CONF_TIMEOUT)) { 635 reg |= MAX6697_CONF_TIMEOUT; 636 } 637 if (pdata->extended_range_enable && 638 (chip->valid_conf & MAX6581_CONF_EXTENDED)) { 639 reg |= MAX6581_CONF_EXTENDED; 640 data->temp_offset = 64; 641 } 642 if (pdata->resistance_cancellation && 643 (chip->valid_conf & MAX6697_CONF_RESISTANCE)) { 644 reg |= MAX6697_CONF_RESISTANCE; 645 factor++; 646 } 647 if (pdata->beta_compensation && 648 (chip->valid_conf & MAX6693_CONF_BETA)) { 649 reg |= MAX6693_CONF_BETA; 650 } 651 652 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg); 653 if (ret < 0) 654 return ret; 655 656 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK, 657 MAX6697_ALERT_MAP_BITS(pdata->alert_mask)); 658 if (ret < 0) 659 return ret; 660 661 ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK, 662 MAX6697_OVERT_MAP_BITS(pdata->over_temperature_mask)); 663 if (ret < 0) 664 return ret; 665 666 if (data->type == max6581) { 667 factor += hweight8(pdata->resistance_cancellation >> 1); 668 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE, 669 pdata->resistance_cancellation >> 1); 670 if (ret < 0) 671 return ret; 672 ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY, 673 pdata->ideality_value); 674 if (ret < 0) 675 return ret; 676 ret = i2c_smbus_write_byte_data(client, 677 MAX6581_REG_IDEALITY_SELECT, 678 pdata->ideality_mask >> 1); 679 if (ret < 0) 680 return ret; 681 } 682done: 683 data->update_interval = factor * MAX6697_CONV_TIME; 684 return 0; 685} 686 687static const struct i2c_device_id max6697_id[]; 688 689static int max6697_probe(struct i2c_client *client) 690{ 691 struct i2c_adapter *adapter = client->adapter; 692 struct device *dev = &client->dev; 693 struct max6697_data *data; 694 struct device *hwmon_dev; 695 int err; 696 697 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 698 return -ENODEV; 699 700 data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL); 701 if (!data) 702 return -ENOMEM; 703 704 if (client->dev.of_node) 705 data->type = (uintptr_t)of_device_get_match_data(&client->dev); 706 else 707 data->type = i2c_match_id(max6697_id, client)->driver_data; 708 data->chip = &max6697_chip_data[data->type]; 709 data->client = client; 710 mutex_init(&data->update_lock); 711 712 err = max6697_init_chip(data, client); 713 if (err) 714 return err; 715 716 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 717 data, 718 max6697_groups); 719 return PTR_ERR_OR_ZERO(hwmon_dev); 720} 721 722static const struct i2c_device_id max6697_id[] = { 723 { "max6581", max6581 }, 724 { "max6602", max6602 }, 725 { "max6622", max6622 }, 726 { "max6636", max6636 }, 727 { "max6689", max6689 }, 728 { "max6693", max6693 }, 729 { "max6694", max6694 }, 730 { "max6697", max6697 }, 731 { "max6698", max6698 }, 732 { "max6699", max6699 }, 733 { } 734}; 735MODULE_DEVICE_TABLE(i2c, max6697_id); 736 737static const struct of_device_id __maybe_unused max6697_of_match[] = { 738 { 739 .compatible = "maxim,max6581", 740 .data = (void *)max6581 741 }, 742 { 743 .compatible = "maxim,max6602", 744 .data = (void *)max6602 745 }, 746 { 747 .compatible = "maxim,max6622", 748 .data = (void *)max6622 749 }, 750 { 751 .compatible = "maxim,max6636", 752 .data = (void *)max6636 753 }, 754 { 755 .compatible = "maxim,max6689", 756 .data = (void *)max6689 757 }, 758 { 759 .compatible = "maxim,max6693", 760 .data = (void *)max6693 761 }, 762 { 763 .compatible = "maxim,max6694", 764 .data = (void *)max6694 765 }, 766 { 767 .compatible = "maxim,max6697", 768 .data = (void *)max6697 769 }, 770 { 771 .compatible = "maxim,max6698", 772 .data = (void *)max6698 773 }, 774 { 775 .compatible = "maxim,max6699", 776 .data = (void *)max6699 777 }, 778 { }, 779}; 780MODULE_DEVICE_TABLE(of, max6697_of_match); 781 782static struct i2c_driver max6697_driver = { 783 .driver = { 784 .name = "max6697", 785 .of_match_table = of_match_ptr(max6697_of_match), 786 }, 787 .probe = max6697_probe, 788 .id_table = max6697_id, 789}; 790 791module_i2c_driver(max6697_driver); 792 793MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 794MODULE_DESCRIPTION("MAX6697 temperature sensor driver"); 795MODULE_LICENSE("GPL"); 796