1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for the Texas Instruments / Burr Brown INA209 4 * Bidirectional Current/Power Monitor 5 * 6 * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net> 7 * 8 * Derived from Ira W. Snyder's original driver submission 9 * Copyright (C) 2008 Paul Hays <Paul.Hays@cattail.ca> 10 * Copyright (C) 2008-2009 Ira W. Snyder <iws@ovro.caltech.edu> 11 * 12 * Aligned with ina2xx driver 13 * Copyright (C) 2012 Lothar Felten <l-felten@ti.com> 14 * Thanks to Jan Volkering 15 * 16 * Datasheet: 17 * https://www.ti.com/lit/gpn/ina209 18 */ 19 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/init.h> 23 #include <linux/err.h> 24 #include <linux/slab.h> 25 #include <linux/bug.h> 26 #include <linux/i2c.h> 27 #include <linux/hwmon.h> 28 #include <linux/hwmon-sysfs.h> 29 30 #include <linux/platform_data/ina2xx.h> 31 32 /* register definitions */ 33 #define INA209_CONFIGURATION 0x00 34 #define INA209_STATUS 0x01 35 #define INA209_STATUS_MASK 0x02 36 #define INA209_SHUNT_VOLTAGE 0x03 37 #define INA209_BUS_VOLTAGE 0x04 38 #define INA209_POWER 0x05 39 #define INA209_CURRENT 0x06 40 #define INA209_SHUNT_VOLTAGE_POS_PEAK 0x07 41 #define INA209_SHUNT_VOLTAGE_NEG_PEAK 0x08 42 #define INA209_BUS_VOLTAGE_MAX_PEAK 0x09 43 #define INA209_BUS_VOLTAGE_MIN_PEAK 0x0a 44 #define INA209_POWER_PEAK 0x0b 45 #define INA209_SHUNT_VOLTAGE_POS_WARN 0x0c 46 #define INA209_SHUNT_VOLTAGE_NEG_WARN 0x0d 47 #define INA209_POWER_WARN 0x0e 48 #define INA209_BUS_VOLTAGE_OVER_WARN 0x0f 49 #define INA209_BUS_VOLTAGE_UNDER_WARN 0x10 50 #define INA209_POWER_OVER_LIMIT 0x11 51 #define INA209_BUS_VOLTAGE_OVER_LIMIT 0x12 52 #define INA209_BUS_VOLTAGE_UNDER_LIMIT 0x13 53 #define INA209_CRITICAL_DAC_POS 0x14 54 #define INA209_CRITICAL_DAC_NEG 0x15 55 #define INA209_CALIBRATION 0x16 56 57 #define INA209_REGISTERS 0x17 58 59 #define INA209_CONFIG_DEFAULT 0x3c47 /* PGA=8, full range */ 60 #define INA209_SHUNT_DEFAULT 10000 /* uOhm */ 61 62 struct ina209_data { 63 struct i2c_client *client; 64 65 struct mutex update_lock; 66 bool valid; 67 unsigned long last_updated; /* in jiffies */ 68 69 u16 regs[INA209_REGISTERS]; /* All chip registers */ 70 71 u16 config_orig; /* Original configuration */ 72 u16 calibration_orig; /* Original calibration */ 73 u16 update_interval; 74 }; 75 76 static struct ina209_data *ina209_update_device(struct device *dev) 77 { 78 struct ina209_data *data = dev_get_drvdata(dev); 79 struct i2c_client *client = data->client; 80 struct ina209_data *ret = data; 81 s32 val; 82 int i; 83 84 mutex_lock(&data->update_lock); 85 86 if (!data->valid || 87 time_after(jiffies, data->last_updated + data->update_interval)) { 88 for (i = 0; i < ARRAY_SIZE(data->regs); i++) { 89 val = i2c_smbus_read_word_swapped(client, i); 90 if (val < 0) { 91 ret = ERR_PTR(val); 92 goto abort; 93 } 94 data->regs[i] = val; 95 } 96 data->last_updated = jiffies; 97 data->valid = true; 98 } 99 abort: 100 mutex_unlock(&data->update_lock); 101 return ret; 102 } 103 104 /* 105 * Read a value from a device register and convert it to the 106 * appropriate sysfs units 107 */ 108 static long ina209_from_reg(const u8 reg, const u16 val) 109 { 110 switch (reg) { 111 case INA209_SHUNT_VOLTAGE: 112 case INA209_SHUNT_VOLTAGE_POS_PEAK: 113 case INA209_SHUNT_VOLTAGE_NEG_PEAK: 114 case INA209_SHUNT_VOLTAGE_POS_WARN: 115 case INA209_SHUNT_VOLTAGE_NEG_WARN: 116 /* LSB=10 uV. Convert to mV. */ 117 return DIV_ROUND_CLOSEST((s16)val, 100); 118 119 case INA209_BUS_VOLTAGE: 120 case INA209_BUS_VOLTAGE_MAX_PEAK: 121 case INA209_BUS_VOLTAGE_MIN_PEAK: 122 case INA209_BUS_VOLTAGE_OVER_WARN: 123 case INA209_BUS_VOLTAGE_UNDER_WARN: 124 case INA209_BUS_VOLTAGE_OVER_LIMIT: 125 case INA209_BUS_VOLTAGE_UNDER_LIMIT: 126 /* LSB=4 mV, last 3 bits unused */ 127 return (val >> 3) * 4; 128 129 case INA209_CRITICAL_DAC_POS: 130 /* LSB=1 mV, in the upper 8 bits */ 131 return val >> 8; 132 133 case INA209_CRITICAL_DAC_NEG: 134 /* LSB=1 mV, in the upper 8 bits */ 135 return -1 * (val >> 8); 136 137 case INA209_POWER: 138 case INA209_POWER_PEAK: 139 case INA209_POWER_WARN: 140 case INA209_POWER_OVER_LIMIT: 141 /* LSB=20 mW. Convert to uW */ 142 return val * 20 * 1000L; 143 144 case INA209_CURRENT: 145 /* LSB=1 mA (selected). Is in mA */ 146 return (s16)val; 147 } 148 149 /* programmer goofed */ 150 WARN_ON_ONCE(1); 151 return 0; 152 } 153 154 /* 155 * Take a value and convert it to register format, clamping the value 156 * to the appropriate range. 157 */ 158 static int ina209_to_reg(u8 reg, u16 old, long val) 159 { 160 switch (reg) { 161 case INA209_SHUNT_VOLTAGE_POS_WARN: 162 case INA209_SHUNT_VOLTAGE_NEG_WARN: 163 /* Limit to +- 320 mV, 10 uV LSB */ 164 return clamp_val(val, -320, 320) * 100; 165 166 case INA209_BUS_VOLTAGE_OVER_WARN: 167 case INA209_BUS_VOLTAGE_UNDER_WARN: 168 case INA209_BUS_VOLTAGE_OVER_LIMIT: 169 case INA209_BUS_VOLTAGE_UNDER_LIMIT: 170 /* 171 * Limit to 0-32000 mV, 4 mV LSB 172 * 173 * The last three bits aren't part of the value, but we'll 174 * preserve them in their original state. 175 */ 176 return (DIV_ROUND_CLOSEST(clamp_val(val, 0, 32000), 4) << 3) 177 | (old & 0x7); 178 179 case INA209_CRITICAL_DAC_NEG: 180 /* 181 * Limit to -255-0 mV, 1 mV LSB 182 * Convert the value to a positive value for the register 183 * 184 * The value lives in the top 8 bits only, be careful 185 * and keep original value of other bits. 186 */ 187 return (clamp_val(-val, 0, 255) << 8) | (old & 0xff); 188 189 case INA209_CRITICAL_DAC_POS: 190 /* 191 * Limit to 0-255 mV, 1 mV LSB 192 * 193 * The value lives in the top 8 bits only, be careful 194 * and keep original value of other bits. 195 */ 196 return (clamp_val(val, 0, 255) << 8) | (old & 0xff); 197 198 case INA209_POWER_WARN: 199 case INA209_POWER_OVER_LIMIT: 200 /* 20 mW LSB */ 201 return DIV_ROUND_CLOSEST(val, 20 * 1000); 202 } 203 204 /* Other registers are read-only, return access error */ 205 return -EACCES; 206 } 207 208 static int ina209_interval_from_reg(u16 reg) 209 { 210 return 68 >> (15 - ((reg >> 3) & 0x0f)); 211 } 212 213 static u16 ina209_reg_from_interval(u16 config, long interval) 214 { 215 int i, adc; 216 217 if (interval <= 0) { 218 adc = 8; 219 } else { 220 adc = 15; 221 for (i = 34 + 34 / 2; i; i >>= 1) { 222 if (i < interval) 223 break; 224 adc--; 225 } 226 } 227 return (config & 0xf807) | (adc << 3) | (adc << 7); 228 } 229 230 static ssize_t ina209_interval_store(struct device *dev, 231 struct device_attribute *da, 232 const char *buf, size_t count) 233 { 234 struct ina209_data *data = ina209_update_device(dev); 235 long val; 236 u16 regval; 237 int ret; 238 239 if (IS_ERR(data)) 240 return PTR_ERR(data); 241 242 ret = kstrtol(buf, 10, &val); 243 if (ret < 0) 244 return ret; 245 246 mutex_lock(&data->update_lock); 247 regval = ina209_reg_from_interval(data->regs[INA209_CONFIGURATION], 248 val); 249 i2c_smbus_write_word_swapped(data->client, INA209_CONFIGURATION, 250 regval); 251 data->regs[INA209_CONFIGURATION] = regval; 252 data->update_interval = ina209_interval_from_reg(regval); 253 mutex_unlock(&data->update_lock); 254 return count; 255 } 256 257 static ssize_t ina209_interval_show(struct device *dev, 258 struct device_attribute *da, char *buf) 259 { 260 struct ina209_data *data = dev_get_drvdata(dev); 261 262 return snprintf(buf, PAGE_SIZE, "%d\n", data->update_interval); 263 } 264 265 /* 266 * History is reset by writing 1 into bit 0 of the respective peak register. 267 * Since more than one peak register may be affected by the scope of a 268 * reset_history attribute write, use a bit mask in attr->index to identify 269 * which registers are affected. 270 */ 271 static u16 ina209_reset_history_regs[] = { 272 INA209_SHUNT_VOLTAGE_POS_PEAK, 273 INA209_SHUNT_VOLTAGE_NEG_PEAK, 274 INA209_BUS_VOLTAGE_MAX_PEAK, 275 INA209_BUS_VOLTAGE_MIN_PEAK, 276 INA209_POWER_PEAK 277 }; 278 279 static ssize_t ina209_history_store(struct device *dev, 280 struct device_attribute *da, 281 const char *buf, size_t count) 282 { 283 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 284 struct ina209_data *data = dev_get_drvdata(dev); 285 struct i2c_client *client = data->client; 286 u32 mask = attr->index; 287 long val; 288 int i, ret; 289 290 ret = kstrtol(buf, 10, &val); 291 if (ret < 0) 292 return ret; 293 294 mutex_lock(&data->update_lock); 295 for (i = 0; i < ARRAY_SIZE(ina209_reset_history_regs); i++) { 296 if (mask & (1 << i)) 297 i2c_smbus_write_word_swapped(client, 298 ina209_reset_history_regs[i], 1); 299 } 300 data->valid = false; 301 mutex_unlock(&data->update_lock); 302 return count; 303 } 304 305 static ssize_t ina209_value_store(struct device *dev, 306 struct device_attribute *da, 307 const char *buf, size_t count) 308 { 309 struct ina209_data *data = ina209_update_device(dev); 310 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 311 int reg = attr->index; 312 long val; 313 int ret; 314 315 if (IS_ERR(data)) 316 return PTR_ERR(data); 317 318 ret = kstrtol(buf, 10, &val); 319 if (ret < 0) 320 return ret; 321 322 mutex_lock(&data->update_lock); 323 ret = ina209_to_reg(reg, data->regs[reg], val); 324 if (ret < 0) { 325 count = ret; 326 goto abort; 327 } 328 i2c_smbus_write_word_swapped(data->client, reg, ret); 329 data->regs[reg] = ret; 330 abort: 331 mutex_unlock(&data->update_lock); 332 return count; 333 } 334 335 static ssize_t ina209_value_show(struct device *dev, 336 struct device_attribute *da, char *buf) 337 { 338 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 339 struct ina209_data *data = ina209_update_device(dev); 340 long val; 341 342 if (IS_ERR(data)) 343 return PTR_ERR(data); 344 345 val = ina209_from_reg(attr->index, data->regs[attr->index]); 346 return snprintf(buf, PAGE_SIZE, "%ld\n", val); 347 } 348 349 static ssize_t ina209_alarm_show(struct device *dev, 350 struct device_attribute *da, char *buf) 351 { 352 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 353 struct ina209_data *data = ina209_update_device(dev); 354 const unsigned int mask = attr->index; 355 u16 status; 356 357 if (IS_ERR(data)) 358 return PTR_ERR(data); 359 360 status = data->regs[INA209_STATUS]; 361 362 /* 363 * All alarms are in the INA209_STATUS register. To avoid a long 364 * switch statement, the mask is passed in attr->index 365 */ 366 return snprintf(buf, PAGE_SIZE, "%u\n", !!(status & mask)); 367 } 368 369 /* Shunt voltage, history, limits, alarms */ 370 static SENSOR_DEVICE_ATTR_RO(in0_input, ina209_value, INA209_SHUNT_VOLTAGE); 371 static SENSOR_DEVICE_ATTR_RO(in0_input_highest, ina209_value, 372 INA209_SHUNT_VOLTAGE_POS_PEAK); 373 static SENSOR_DEVICE_ATTR_RO(in0_input_lowest, ina209_value, 374 INA209_SHUNT_VOLTAGE_NEG_PEAK); 375 static SENSOR_DEVICE_ATTR_WO(in0_reset_history, ina209_history, 376 (1 << 0) | (1 << 1)); 377 static SENSOR_DEVICE_ATTR_RW(in0_max, ina209_value, 378 INA209_SHUNT_VOLTAGE_POS_WARN); 379 static SENSOR_DEVICE_ATTR_RW(in0_min, ina209_value, 380 INA209_SHUNT_VOLTAGE_NEG_WARN); 381 static SENSOR_DEVICE_ATTR_RW(in0_crit_max, ina209_value, 382 INA209_CRITICAL_DAC_POS); 383 static SENSOR_DEVICE_ATTR_RW(in0_crit_min, ina209_value, 384 INA209_CRITICAL_DAC_NEG); 385 386 static SENSOR_DEVICE_ATTR_RO(in0_min_alarm, ina209_alarm, 1 << 11); 387 static SENSOR_DEVICE_ATTR_RO(in0_max_alarm, ina209_alarm, 1 << 12); 388 static SENSOR_DEVICE_ATTR_RO(in0_crit_min_alarm, ina209_alarm, 1 << 6); 389 static SENSOR_DEVICE_ATTR_RO(in0_crit_max_alarm, ina209_alarm, 1 << 7); 390 391 /* Bus voltage, history, limits, alarms */ 392 static SENSOR_DEVICE_ATTR_RO(in1_input, ina209_value, INA209_BUS_VOLTAGE); 393 static SENSOR_DEVICE_ATTR_RO(in1_input_highest, ina209_value, 394 INA209_BUS_VOLTAGE_MAX_PEAK); 395 static SENSOR_DEVICE_ATTR_RO(in1_input_lowest, ina209_value, 396 INA209_BUS_VOLTAGE_MIN_PEAK); 397 static SENSOR_DEVICE_ATTR_WO(in1_reset_history, ina209_history, 398 (1 << 2) | (1 << 3)); 399 static SENSOR_DEVICE_ATTR_RW(in1_max, ina209_value, 400 INA209_BUS_VOLTAGE_OVER_WARN); 401 static SENSOR_DEVICE_ATTR_RW(in1_min, ina209_value, 402 INA209_BUS_VOLTAGE_UNDER_WARN); 403 static SENSOR_DEVICE_ATTR_RW(in1_crit_max, ina209_value, 404 INA209_BUS_VOLTAGE_OVER_LIMIT); 405 static SENSOR_DEVICE_ATTR_RW(in1_crit_min, ina209_value, 406 INA209_BUS_VOLTAGE_UNDER_LIMIT); 407 408 static SENSOR_DEVICE_ATTR_RO(in1_min_alarm, ina209_alarm, 1 << 14); 409 static SENSOR_DEVICE_ATTR_RO(in1_max_alarm, ina209_alarm, 1 << 15); 410 static SENSOR_DEVICE_ATTR_RO(in1_crit_min_alarm, ina209_alarm, 1 << 9); 411 static SENSOR_DEVICE_ATTR_RO(in1_crit_max_alarm, ina209_alarm, 1 << 10); 412 413 /* Power */ 414 static SENSOR_DEVICE_ATTR_RO(power1_input, ina209_value, INA209_POWER); 415 static SENSOR_DEVICE_ATTR_RO(power1_input_highest, ina209_value, 416 INA209_POWER_PEAK); 417 static SENSOR_DEVICE_ATTR_WO(power1_reset_history, ina209_history, 1 << 4); 418 static SENSOR_DEVICE_ATTR_RW(power1_max, ina209_value, INA209_POWER_WARN); 419 static SENSOR_DEVICE_ATTR_RW(power1_crit, ina209_value, 420 INA209_POWER_OVER_LIMIT); 421 422 static SENSOR_DEVICE_ATTR_RO(power1_max_alarm, ina209_alarm, 1 << 13); 423 static SENSOR_DEVICE_ATTR_RO(power1_crit_alarm, ina209_alarm, 1 << 8); 424 425 /* Current */ 426 static SENSOR_DEVICE_ATTR_RO(curr1_input, ina209_value, INA209_CURRENT); 427 428 static SENSOR_DEVICE_ATTR_RW(update_interval, ina209_interval, 0); 429 430 /* 431 * Finally, construct an array of pointers to members of the above objects, 432 * as required for sysfs_create_group() 433 */ 434 static struct attribute *ina209_attrs[] = { 435 &sensor_dev_attr_in0_input.dev_attr.attr, 436 &sensor_dev_attr_in0_input_highest.dev_attr.attr, 437 &sensor_dev_attr_in0_input_lowest.dev_attr.attr, 438 &sensor_dev_attr_in0_reset_history.dev_attr.attr, 439 &sensor_dev_attr_in0_max.dev_attr.attr, 440 &sensor_dev_attr_in0_min.dev_attr.attr, 441 &sensor_dev_attr_in0_crit_max.dev_attr.attr, 442 &sensor_dev_attr_in0_crit_min.dev_attr.attr, 443 &sensor_dev_attr_in0_max_alarm.dev_attr.attr, 444 &sensor_dev_attr_in0_min_alarm.dev_attr.attr, 445 &sensor_dev_attr_in0_crit_max_alarm.dev_attr.attr, 446 &sensor_dev_attr_in0_crit_min_alarm.dev_attr.attr, 447 448 &sensor_dev_attr_in1_input.dev_attr.attr, 449 &sensor_dev_attr_in1_input_highest.dev_attr.attr, 450 &sensor_dev_attr_in1_input_lowest.dev_attr.attr, 451 &sensor_dev_attr_in1_reset_history.dev_attr.attr, 452 &sensor_dev_attr_in1_max.dev_attr.attr, 453 &sensor_dev_attr_in1_min.dev_attr.attr, 454 &sensor_dev_attr_in1_crit_max.dev_attr.attr, 455 &sensor_dev_attr_in1_crit_min.dev_attr.attr, 456 &sensor_dev_attr_in1_max_alarm.dev_attr.attr, 457 &sensor_dev_attr_in1_min_alarm.dev_attr.attr, 458 &sensor_dev_attr_in1_crit_max_alarm.dev_attr.attr, 459 &sensor_dev_attr_in1_crit_min_alarm.dev_attr.attr, 460 461 &sensor_dev_attr_power1_input.dev_attr.attr, 462 &sensor_dev_attr_power1_input_highest.dev_attr.attr, 463 &sensor_dev_attr_power1_reset_history.dev_attr.attr, 464 &sensor_dev_attr_power1_max.dev_attr.attr, 465 &sensor_dev_attr_power1_crit.dev_attr.attr, 466 &sensor_dev_attr_power1_max_alarm.dev_attr.attr, 467 &sensor_dev_attr_power1_crit_alarm.dev_attr.attr, 468 469 &sensor_dev_attr_curr1_input.dev_attr.attr, 470 471 &sensor_dev_attr_update_interval.dev_attr.attr, 472 473 NULL, 474 }; 475 ATTRIBUTE_GROUPS(ina209); 476 477 static void ina209_restore_conf(struct i2c_client *client, 478 struct ina209_data *data) 479 { 480 /* Restore initial configuration */ 481 i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION, 482 data->config_orig); 483 i2c_smbus_write_word_swapped(client, INA209_CALIBRATION, 484 data->calibration_orig); 485 } 486 487 static int ina209_init_client(struct i2c_client *client, 488 struct ina209_data *data) 489 { 490 struct ina2xx_platform_data *pdata = dev_get_platdata(&client->dev); 491 u32 shunt; 492 int reg; 493 494 reg = i2c_smbus_read_word_swapped(client, INA209_CALIBRATION); 495 if (reg < 0) 496 return reg; 497 data->calibration_orig = reg; 498 499 reg = i2c_smbus_read_word_swapped(client, INA209_CONFIGURATION); 500 if (reg < 0) 501 return reg; 502 data->config_orig = reg; 503 504 if (pdata) { 505 if (pdata->shunt_uohms <= 0) 506 return -EINVAL; 507 shunt = pdata->shunt_uohms; 508 } else if (!of_property_read_u32(client->dev.of_node, "shunt-resistor", 509 &shunt)) { 510 if (shunt == 0) 511 return -EINVAL; 512 } else { 513 shunt = data->calibration_orig ? 514 40960000 / data->calibration_orig : INA209_SHUNT_DEFAULT; 515 } 516 517 i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION, 518 INA209_CONFIG_DEFAULT); 519 data->update_interval = ina209_interval_from_reg(INA209_CONFIG_DEFAULT); 520 521 /* 522 * Calibrate current LSB to 1mA. Shunt is in uOhms. 523 * See equation 13 in datasheet. 524 */ 525 i2c_smbus_write_word_swapped(client, INA209_CALIBRATION, 526 clamp_val(40960000 / shunt, 1, 65535)); 527 528 /* Clear status register */ 529 i2c_smbus_read_word_swapped(client, INA209_STATUS); 530 531 return 0; 532 } 533 534 static int ina209_probe(struct i2c_client *client) 535 { 536 struct i2c_adapter *adapter = client->adapter; 537 struct ina209_data *data; 538 struct device *hwmon_dev; 539 int ret; 540 541 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) 542 return -ENODEV; 543 544 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 545 if (!data) 546 return -ENOMEM; 547 548 i2c_set_clientdata(client, data); 549 data->client = client; 550 mutex_init(&data->update_lock); 551 552 ret = ina209_init_client(client, data); 553 if (ret) 554 return ret; 555 556 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev, 557 client->name, 558 data, ina209_groups); 559 if (IS_ERR(hwmon_dev)) { 560 ret = PTR_ERR(hwmon_dev); 561 goto out_restore_conf; 562 } 563 564 return 0; 565 566 out_restore_conf: 567 ina209_restore_conf(client, data); 568 return ret; 569 } 570 571 static int ina209_remove(struct i2c_client *client) 572 { 573 struct ina209_data *data = i2c_get_clientdata(client); 574 575 ina209_restore_conf(client, data); 576 577 return 0; 578 } 579 580 static const struct i2c_device_id ina209_id[] = { 581 { "ina209", 0 }, 582 { } 583 }; 584 MODULE_DEVICE_TABLE(i2c, ina209_id); 585 586 static const struct of_device_id __maybe_unused ina209_of_match[] = { 587 { .compatible = "ti,ina209" }, 588 { }, 589 }; 590 MODULE_DEVICE_TABLE(of, ina209_of_match); 591 592 /* This is the driver that will be inserted */ 593 static struct i2c_driver ina209_driver = { 594 .class = I2C_CLASS_HWMON, 595 .driver = { 596 .name = "ina209", 597 .of_match_table = of_match_ptr(ina209_of_match), 598 }, 599 .probe_new = ina209_probe, 600 .remove = ina209_remove, 601 .id_table = ina209_id, 602 }; 603 604 module_i2c_driver(ina209_driver); 605 606 MODULE_AUTHOR("Ira W. Snyder <iws@ovro.caltech.edu>, Paul Hays <Paul.Hays@cattail.ca>, Guenter Roeck <linux@roeck-us.net>"); 607 MODULE_DESCRIPTION("INA209 driver"); 608 MODULE_LICENSE("GPL"); 609