1 /* 2 * nct7904.c - driver for Nuvoton NCT7904D. 3 * 4 * Copyright (c) 2015 Kontron 5 * Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18 #include <linux/module.h> 19 #include <linux/device.h> 20 #include <linux/init.h> 21 #include <linux/i2c.h> 22 #include <linux/mutex.h> 23 #include <linux/hwmon.h> 24 #include <linux/hwmon-sysfs.h> 25 26 #define VENDOR_ID_REG 0x7A /* Any bank */ 27 #define NUVOTON_ID 0x50 28 #define CHIP_ID_REG 0x7B /* Any bank */ 29 #define NCT7904_ID 0xC5 30 #define DEVICE_ID_REG 0x7C /* Any bank */ 31 32 #define BANK_SEL_REG 0xFF 33 #define BANK_0 0x00 34 #define BANK_1 0x01 35 #define BANK_2 0x02 36 #define BANK_3 0x03 37 #define BANK_4 0x04 38 #define BANK_MAX 0x04 39 40 #define FANIN_MAX 12 /* Counted from 1 */ 41 #define VSEN_MAX 21 /* VSEN1..14, 3VDD, VBAT, V3VSB, 42 LTD (not a voltage), VSEN17..19 */ 43 #define FANCTL_MAX 4 /* Counted from 1 */ 44 #define TCPU_MAX 8 /* Counted from 1 */ 45 #define TEMP_MAX 4 /* Counted from 1 */ 46 47 #define VT_ADC_CTRL0_REG 0x20 /* Bank 0 */ 48 #define VT_ADC_CTRL1_REG 0x21 /* Bank 0 */ 49 #define VT_ADC_CTRL2_REG 0x22 /* Bank 0 */ 50 #define FANIN_CTRL0_REG 0x24 51 #define FANIN_CTRL1_REG 0x25 52 #define DTS_T_CTRL0_REG 0x26 53 #define DTS_T_CTRL1_REG 0x27 54 #define VT_ADC_MD_REG 0x2E 55 56 #define VSEN1_HV_REG 0x40 /* Bank 0; 2 regs (HV/LV) per sensor */ 57 #define TEMP_CH1_HV_REG 0x42 /* Bank 0; same as VSEN2_HV */ 58 #define LTD_HV_REG 0x62 /* Bank 0; 2 regs in VSEN range */ 59 #define FANIN1_HV_REG 0x80 /* Bank 0; 2 regs (HV/LV) per sensor */ 60 #define T_CPU1_HV_REG 0xA0 /* Bank 0; 2 regs (HV/LV) per sensor */ 61 62 #define PRTS_REG 0x03 /* Bank 2 */ 63 #define FANCTL1_FMR_REG 0x00 /* Bank 3; 1 reg per channel */ 64 #define FANCTL1_OUT_REG 0x10 /* Bank 3; 1 reg per channel */ 65 66 static const unsigned short normal_i2c[] = { 67 0x2d, 0x2e, I2C_CLIENT_END 68 }; 69 70 struct nct7904_data { 71 struct i2c_client *client; 72 struct mutex bank_lock; 73 int bank_sel; 74 u32 fanin_mask; 75 u32 vsen_mask; 76 u32 tcpu_mask; 77 u8 fan_mode[FANCTL_MAX]; 78 }; 79 80 /* Access functions */ 81 static int nct7904_bank_lock(struct nct7904_data *data, unsigned bank) 82 { 83 int ret; 84 85 mutex_lock(&data->bank_lock); 86 if (data->bank_sel == bank) 87 return 0; 88 ret = i2c_smbus_write_byte_data(data->client, BANK_SEL_REG, bank); 89 if (ret == 0) 90 data->bank_sel = bank; 91 else 92 data->bank_sel = -1; 93 return ret; 94 } 95 96 static inline void nct7904_bank_release(struct nct7904_data *data) 97 { 98 mutex_unlock(&data->bank_lock); 99 } 100 101 /* Read 1-byte register. Returns unsigned reg or -ERRNO on error. */ 102 static int nct7904_read_reg(struct nct7904_data *data, 103 unsigned bank, unsigned reg) 104 { 105 struct i2c_client *client = data->client; 106 int ret; 107 108 ret = nct7904_bank_lock(data, bank); 109 if (ret == 0) 110 ret = i2c_smbus_read_byte_data(client, reg); 111 112 nct7904_bank_release(data); 113 return ret; 114 } 115 116 /* 117 * Read 2-byte register. Returns register in big-endian format or 118 * -ERRNO on error. 119 */ 120 static int nct7904_read_reg16(struct nct7904_data *data, 121 unsigned bank, unsigned reg) 122 { 123 struct i2c_client *client = data->client; 124 int ret, hi; 125 126 ret = nct7904_bank_lock(data, bank); 127 if (ret == 0) { 128 ret = i2c_smbus_read_byte_data(client, reg); 129 if (ret >= 0) { 130 hi = ret; 131 ret = i2c_smbus_read_byte_data(client, reg + 1); 132 if (ret >= 0) 133 ret |= hi << 8; 134 } 135 } 136 137 nct7904_bank_release(data); 138 return ret; 139 } 140 141 /* Write 1-byte register. Returns 0 or -ERRNO on error. */ 142 static int nct7904_write_reg(struct nct7904_data *data, 143 unsigned bank, unsigned reg, u8 val) 144 { 145 struct i2c_client *client = data->client; 146 int ret; 147 148 ret = nct7904_bank_lock(data, bank); 149 if (ret == 0) 150 ret = i2c_smbus_write_byte_data(client, reg, val); 151 152 nct7904_bank_release(data); 153 return ret; 154 } 155 156 /* FANIN ATTR */ 157 static ssize_t show_fan(struct device *dev, 158 struct device_attribute *devattr, char *buf) 159 { 160 int index = to_sensor_dev_attr(devattr)->index; 161 struct nct7904_data *data = dev_get_drvdata(dev); 162 int ret; 163 unsigned cnt, rpm; 164 165 ret = nct7904_read_reg16(data, BANK_0, FANIN1_HV_REG + index * 2); 166 if (ret < 0) 167 return ret; 168 cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f); 169 if (cnt == 0x1fff) 170 rpm = 0; 171 else 172 rpm = 1350000 / cnt; 173 return sprintf(buf, "%u\n", rpm); 174 } 175 176 static umode_t nct7904_fanin_is_visible(struct kobject *kobj, 177 struct attribute *a, int n) 178 { 179 struct device *dev = container_of(kobj, struct device, kobj); 180 struct nct7904_data *data = dev_get_drvdata(dev); 181 182 if (data->fanin_mask & (1 << n)) 183 return a->mode; 184 return 0; 185 } 186 187 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 188 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 189 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 190 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 191 static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan, NULL, 4); 192 static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan, NULL, 5); 193 static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan, NULL, 6); 194 static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan, NULL, 7); 195 static SENSOR_DEVICE_ATTR(fan9_input, S_IRUGO, show_fan, NULL, 8); 196 static SENSOR_DEVICE_ATTR(fan10_input, S_IRUGO, show_fan, NULL, 9); 197 static SENSOR_DEVICE_ATTR(fan11_input, S_IRUGO, show_fan, NULL, 10); 198 static SENSOR_DEVICE_ATTR(fan12_input, S_IRUGO, show_fan, NULL, 11); 199 200 static struct attribute *nct7904_fanin_attrs[] = { 201 &sensor_dev_attr_fan1_input.dev_attr.attr, 202 &sensor_dev_attr_fan2_input.dev_attr.attr, 203 &sensor_dev_attr_fan3_input.dev_attr.attr, 204 &sensor_dev_attr_fan4_input.dev_attr.attr, 205 &sensor_dev_attr_fan5_input.dev_attr.attr, 206 &sensor_dev_attr_fan6_input.dev_attr.attr, 207 &sensor_dev_attr_fan7_input.dev_attr.attr, 208 &sensor_dev_attr_fan8_input.dev_attr.attr, 209 &sensor_dev_attr_fan9_input.dev_attr.attr, 210 &sensor_dev_attr_fan10_input.dev_attr.attr, 211 &sensor_dev_attr_fan11_input.dev_attr.attr, 212 &sensor_dev_attr_fan12_input.dev_attr.attr, 213 NULL 214 }; 215 216 static const struct attribute_group nct7904_fanin_group = { 217 .attrs = nct7904_fanin_attrs, 218 .is_visible = nct7904_fanin_is_visible, 219 }; 220 221 /* VSEN ATTR */ 222 static ssize_t show_voltage(struct device *dev, 223 struct device_attribute *devattr, char *buf) 224 { 225 int index = to_sensor_dev_attr(devattr)->index; 226 struct nct7904_data *data = dev_get_drvdata(dev); 227 int ret; 228 int volt; 229 230 ret = nct7904_read_reg16(data, BANK_0, VSEN1_HV_REG + index * 2); 231 if (ret < 0) 232 return ret; 233 volt = ((ret & 0xff00) >> 5) | (ret & 0x7); 234 if (index < 14) 235 volt *= 2; /* 0.002V scale */ 236 else 237 volt *= 6; /* 0.006V scale */ 238 239 return sprintf(buf, "%d\n", volt); 240 } 241 242 static ssize_t show_ltemp(struct device *dev, 243 struct device_attribute *devattr, char *buf) 244 { 245 struct nct7904_data *data = dev_get_drvdata(dev); 246 int ret; 247 int temp; 248 249 ret = nct7904_read_reg16(data, BANK_0, LTD_HV_REG); 250 if (ret < 0) 251 return ret; 252 temp = ((ret & 0xff00) >> 5) | (ret & 0x7); 253 temp = sign_extend32(temp, 10) * 125; 254 255 return sprintf(buf, "%d\n", temp); 256 } 257 258 static umode_t nct7904_vsen_is_visible(struct kobject *kobj, 259 struct attribute *a, int n) 260 { 261 struct device *dev = container_of(kobj, struct device, kobj); 262 struct nct7904_data *data = dev_get_drvdata(dev); 263 264 if (data->vsen_mask & (1 << n)) 265 return a->mode; 266 return 0; 267 } 268 269 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_voltage, NULL, 0); 270 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_voltage, NULL, 1); 271 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_voltage, NULL, 2); 272 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_voltage, NULL, 3); 273 static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_voltage, NULL, 4); 274 static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_voltage, NULL, 5); 275 static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_voltage, NULL, 6); 276 static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_voltage, NULL, 7); 277 static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_voltage, NULL, 8); 278 static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_voltage, NULL, 9); 279 static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_voltage, NULL, 10); 280 static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_voltage, NULL, 11); 281 static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, show_voltage, NULL, 12); 282 static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, show_voltage, NULL, 13); 283 /* 284 * Next 3 voltage sensors have specific names in the Nuvoton doc 285 * (3VDD, VBAT, 3VSB) but we use vacant numbers for them. 286 */ 287 static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, show_voltage, NULL, 14); 288 static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, show_voltage, NULL, 15); 289 static SENSOR_DEVICE_ATTR(in20_input, S_IRUGO, show_voltage, NULL, 16); 290 /* This is not a voltage, but a local temperature sensor. */ 291 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_ltemp, NULL, 0); 292 static SENSOR_DEVICE_ATTR(in17_input, S_IRUGO, show_voltage, NULL, 18); 293 static SENSOR_DEVICE_ATTR(in18_input, S_IRUGO, show_voltage, NULL, 19); 294 static SENSOR_DEVICE_ATTR(in19_input, S_IRUGO, show_voltage, NULL, 20); 295 296 static struct attribute *nct7904_vsen_attrs[] = { 297 &sensor_dev_attr_in1_input.dev_attr.attr, 298 &sensor_dev_attr_in2_input.dev_attr.attr, 299 &sensor_dev_attr_in3_input.dev_attr.attr, 300 &sensor_dev_attr_in4_input.dev_attr.attr, 301 &sensor_dev_attr_in5_input.dev_attr.attr, 302 &sensor_dev_attr_in6_input.dev_attr.attr, 303 &sensor_dev_attr_in7_input.dev_attr.attr, 304 &sensor_dev_attr_in8_input.dev_attr.attr, 305 &sensor_dev_attr_in9_input.dev_attr.attr, 306 &sensor_dev_attr_in10_input.dev_attr.attr, 307 &sensor_dev_attr_in11_input.dev_attr.attr, 308 &sensor_dev_attr_in12_input.dev_attr.attr, 309 &sensor_dev_attr_in13_input.dev_attr.attr, 310 &sensor_dev_attr_in14_input.dev_attr.attr, 311 &sensor_dev_attr_in15_input.dev_attr.attr, 312 &sensor_dev_attr_in16_input.dev_attr.attr, 313 &sensor_dev_attr_in20_input.dev_attr.attr, 314 &sensor_dev_attr_temp1_input.dev_attr.attr, 315 &sensor_dev_attr_in17_input.dev_attr.attr, 316 &sensor_dev_attr_in18_input.dev_attr.attr, 317 &sensor_dev_attr_in19_input.dev_attr.attr, 318 NULL 319 }; 320 321 static const struct attribute_group nct7904_vsen_group = { 322 .attrs = nct7904_vsen_attrs, 323 .is_visible = nct7904_vsen_is_visible, 324 }; 325 326 /* CPU_TEMP ATTR */ 327 static ssize_t show_tcpu(struct device *dev, 328 struct device_attribute *devattr, char *buf) 329 { 330 int index = to_sensor_dev_attr(devattr)->index; 331 struct nct7904_data *data = dev_get_drvdata(dev); 332 int ret; 333 int temp; 334 335 ret = nct7904_read_reg16(data, BANK_0, T_CPU1_HV_REG + index * 2); 336 if (ret < 0) 337 return ret; 338 339 temp = ((ret & 0xff00) >> 5) | (ret & 0x7); 340 temp = sign_extend32(temp, 10) * 125; 341 return sprintf(buf, "%d\n", temp); 342 } 343 344 static umode_t nct7904_tcpu_is_visible(struct kobject *kobj, 345 struct attribute *a, int n) 346 { 347 struct device *dev = container_of(kobj, struct device, kobj); 348 struct nct7904_data *data = dev_get_drvdata(dev); 349 350 if (data->tcpu_mask & (1 << n)) 351 return a->mode; 352 return 0; 353 } 354 355 /* "temp1_input" reserved for local temp */ 356 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_tcpu, NULL, 0); 357 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_tcpu, NULL, 1); 358 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_tcpu, NULL, 2); 359 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_tcpu, NULL, 3); 360 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_tcpu, NULL, 4); 361 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_tcpu, NULL, 5); 362 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_tcpu, NULL, 6); 363 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_tcpu, NULL, 7); 364 365 static struct attribute *nct7904_tcpu_attrs[] = { 366 &sensor_dev_attr_temp2_input.dev_attr.attr, 367 &sensor_dev_attr_temp3_input.dev_attr.attr, 368 &sensor_dev_attr_temp4_input.dev_attr.attr, 369 &sensor_dev_attr_temp5_input.dev_attr.attr, 370 &sensor_dev_attr_temp6_input.dev_attr.attr, 371 &sensor_dev_attr_temp7_input.dev_attr.attr, 372 &sensor_dev_attr_temp8_input.dev_attr.attr, 373 &sensor_dev_attr_temp9_input.dev_attr.attr, 374 NULL 375 }; 376 377 static const struct attribute_group nct7904_tcpu_group = { 378 .attrs = nct7904_tcpu_attrs, 379 .is_visible = nct7904_tcpu_is_visible, 380 }; 381 382 /* PWM ATTR */ 383 static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr, 384 const char *buf, size_t count) 385 { 386 int index = to_sensor_dev_attr(devattr)->index; 387 struct nct7904_data *data = dev_get_drvdata(dev); 388 unsigned long val; 389 int ret; 390 391 if (kstrtoul(buf, 10, &val) < 0) 392 return -EINVAL; 393 if (val > 255) 394 return -EINVAL; 395 396 ret = nct7904_write_reg(data, BANK_3, FANCTL1_OUT_REG + index, val); 397 398 return ret ? ret : count; 399 } 400 401 static ssize_t show_pwm(struct device *dev, 402 struct device_attribute *devattr, char *buf) 403 { 404 int index = to_sensor_dev_attr(devattr)->index; 405 struct nct7904_data *data = dev_get_drvdata(dev); 406 int val; 407 408 val = nct7904_read_reg(data, BANK_3, FANCTL1_OUT_REG + index); 409 if (val < 0) 410 return val; 411 412 return sprintf(buf, "%d\n", val); 413 } 414 415 static ssize_t store_enable(struct device *dev, 416 struct device_attribute *devattr, 417 const char *buf, size_t count) 418 { 419 int index = to_sensor_dev_attr(devattr)->index; 420 struct nct7904_data *data = dev_get_drvdata(dev); 421 unsigned long val; 422 int ret; 423 424 if (kstrtoul(buf, 10, &val) < 0) 425 return -EINVAL; 426 if (val < 1 || val > 2 || (val == 2 && !data->fan_mode[index])) 427 return -EINVAL; 428 429 ret = nct7904_write_reg(data, BANK_3, FANCTL1_FMR_REG + index, 430 val == 2 ? data->fan_mode[index] : 0); 431 432 return ret ? ret : count; 433 } 434 435 /* Return 1 for manual mode or 2 for SmartFan mode */ 436 static ssize_t show_enable(struct device *dev, 437 struct device_attribute *devattr, char *buf) 438 { 439 int index = to_sensor_dev_attr(devattr)->index; 440 struct nct7904_data *data = dev_get_drvdata(dev); 441 int val; 442 443 val = nct7904_read_reg(data, BANK_3, FANCTL1_FMR_REG + index); 444 if (val < 0) 445 return val; 446 447 return sprintf(buf, "%d\n", val ? 2 : 1); 448 } 449 450 /* 2 attributes per channel: pwm and mode */ 451 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, 452 show_pwm, store_pwm, 0); 453 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 454 show_enable, store_enable, 0); 455 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, 456 show_pwm, store_pwm, 1); 457 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, 458 show_enable, store_enable, 1); 459 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, 460 show_pwm, store_pwm, 2); 461 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, 462 show_enable, store_enable, 2); 463 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, 464 show_pwm, store_pwm, 3); 465 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IRUGO | S_IWUSR, 466 show_enable, store_enable, 3); 467 468 static struct attribute *nct7904_fanctl_attrs[] = { 469 &sensor_dev_attr_pwm1.dev_attr.attr, 470 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 471 &sensor_dev_attr_pwm2.dev_attr.attr, 472 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 473 &sensor_dev_attr_pwm3.dev_attr.attr, 474 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 475 &sensor_dev_attr_pwm4.dev_attr.attr, 476 &sensor_dev_attr_pwm4_enable.dev_attr.attr, 477 NULL 478 }; 479 480 static const struct attribute_group nct7904_fanctl_group = { 481 .attrs = nct7904_fanctl_attrs, 482 }; 483 484 static const struct attribute_group *nct7904_groups[] = { 485 &nct7904_fanin_group, 486 &nct7904_vsen_group, 487 &nct7904_tcpu_group, 488 &nct7904_fanctl_group, 489 NULL 490 }; 491 492 /* Return 0 if detection is successful, -ENODEV otherwise */ 493 static int nct7904_detect(struct i2c_client *client, 494 struct i2c_board_info *info) 495 { 496 struct i2c_adapter *adapter = client->adapter; 497 498 if (!i2c_check_functionality(adapter, 499 I2C_FUNC_SMBUS_READ_BYTE | 500 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) 501 return -ENODEV; 502 503 /* Determine the chip type. */ 504 if (i2c_smbus_read_byte_data(client, VENDOR_ID_REG) != NUVOTON_ID || 505 i2c_smbus_read_byte_data(client, CHIP_ID_REG) != NCT7904_ID || 506 (i2c_smbus_read_byte_data(client, DEVICE_ID_REG) & 0xf0) != 0x50 || 507 (i2c_smbus_read_byte_data(client, BANK_SEL_REG) & 0xf8) != 0x00) 508 return -ENODEV; 509 510 strlcpy(info->type, "nct7904", I2C_NAME_SIZE); 511 512 return 0; 513 } 514 515 static int nct7904_probe(struct i2c_client *client, 516 const struct i2c_device_id *id) 517 { 518 struct nct7904_data *data; 519 struct device *hwmon_dev; 520 struct device *dev = &client->dev; 521 int ret, i; 522 u32 mask; 523 524 data = devm_kzalloc(dev, sizeof(struct nct7904_data), GFP_KERNEL); 525 if (!data) 526 return -ENOMEM; 527 528 data->client = client; 529 mutex_init(&data->bank_lock); 530 data->bank_sel = -1; 531 532 /* Setup sensor groups. */ 533 /* FANIN attributes */ 534 ret = nct7904_read_reg16(data, BANK_0, FANIN_CTRL0_REG); 535 if (ret < 0) 536 return ret; 537 data->fanin_mask = (ret >> 8) | ((ret & 0xff) << 8); 538 539 /* 540 * VSEN attributes 541 * 542 * Note: voltage sensors overlap with external temperature 543 * sensors. So, if we ever decide to support the latter 544 * we will have to adjust 'vsen_mask' accordingly. 545 */ 546 mask = 0; 547 ret = nct7904_read_reg16(data, BANK_0, VT_ADC_CTRL0_REG); 548 if (ret >= 0) 549 mask = (ret >> 8) | ((ret & 0xff) << 8); 550 ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG); 551 if (ret >= 0) 552 mask |= (ret << 16); 553 data->vsen_mask = mask; 554 555 /* CPU_TEMP attributes */ 556 ret = nct7904_read_reg16(data, BANK_0, DTS_T_CTRL0_REG); 557 if (ret < 0) 558 return ret; 559 data->tcpu_mask = ((ret >> 8) & 0xf) | ((ret & 0xf) << 4); 560 561 for (i = 0; i < FANCTL_MAX; i++) { 562 ret = nct7904_read_reg(data, BANK_3, FANCTL1_FMR_REG + i); 563 if (ret < 0) 564 return ret; 565 data->fan_mode[i] = ret; 566 } 567 568 hwmon_dev = 569 devm_hwmon_device_register_with_groups(dev, client->name, data, 570 nct7904_groups); 571 return PTR_ERR_OR_ZERO(hwmon_dev); 572 } 573 574 static const struct i2c_device_id nct7904_id[] = { 575 {"nct7904", 0}, 576 {} 577 }; 578 MODULE_DEVICE_TABLE(i2c, nct7904_id); 579 580 static struct i2c_driver nct7904_driver = { 581 .class = I2C_CLASS_HWMON, 582 .driver = { 583 .name = "nct7904", 584 }, 585 .probe = nct7904_probe, 586 .id_table = nct7904_id, 587 .detect = nct7904_detect, 588 .address_list = normal_i2c, 589 }; 590 591 module_i2c_driver(nct7904_driver); 592 593 MODULE_AUTHOR("Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>"); 594 MODULE_DESCRIPTION("Hwmon driver for NUVOTON NCT7904"); 595 MODULE_LICENSE("GPL"); 596