1 /* 2 * Driver for the Texas Instruments / Burr Brown INA209 3 * Bidirectional Current/Power Monitor 4 * 5 * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net> 6 * 7 * Derived from Ira W. Snyder's original driver submission 8 * Copyright (C) 2008 Paul Hays <Paul.Hays@cattail.ca> 9 * Copyright (C) 2008-2009 Ira W. Snyder <iws@ovro.caltech.edu> 10 * 11 * Aligned with ina2xx driver 12 * Copyright (C) 2012 Lothar Felten <l-felten@ti.com> 13 * Thanks to Jan Volkering 14 * 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; version 2 of the License. 18 * 19 * Datasheet: 20 * http://www.ti.com/lit/gpn/ina209 21 */ 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <linux/init.h> 26 #include <linux/err.h> 27 #include <linux/slab.h> 28 #include <linux/bug.h> 29 #include <linux/i2c.h> 30 #include <linux/hwmon.h> 31 #include <linux/hwmon-sysfs.h> 32 33 #include <linux/platform_data/ina2xx.h> 34 35 /* register definitions */ 36 #define INA209_CONFIGURATION 0x00 37 #define INA209_STATUS 0x01 38 #define INA209_STATUS_MASK 0x02 39 #define INA209_SHUNT_VOLTAGE 0x03 40 #define INA209_BUS_VOLTAGE 0x04 41 #define INA209_POWER 0x05 42 #define INA209_CURRENT 0x06 43 #define INA209_SHUNT_VOLTAGE_POS_PEAK 0x07 44 #define INA209_SHUNT_VOLTAGE_NEG_PEAK 0x08 45 #define INA209_BUS_VOLTAGE_MAX_PEAK 0x09 46 #define INA209_BUS_VOLTAGE_MIN_PEAK 0x0a 47 #define INA209_POWER_PEAK 0x0b 48 #define INA209_SHUNT_VOLTAGE_POS_WARN 0x0c 49 #define INA209_SHUNT_VOLTAGE_NEG_WARN 0x0d 50 #define INA209_POWER_WARN 0x0e 51 #define INA209_BUS_VOLTAGE_OVER_WARN 0x0f 52 #define INA209_BUS_VOLTAGE_UNDER_WARN 0x10 53 #define INA209_POWER_OVER_LIMIT 0x11 54 #define INA209_BUS_VOLTAGE_OVER_LIMIT 0x12 55 #define INA209_BUS_VOLTAGE_UNDER_LIMIT 0x13 56 #define INA209_CRITICAL_DAC_POS 0x14 57 #define INA209_CRITICAL_DAC_NEG 0x15 58 #define INA209_CALIBRATION 0x16 59 60 #define INA209_REGISTERS 0x17 61 62 #define INA209_CONFIG_DEFAULT 0x3c47 /* PGA=8, full range */ 63 #define INA209_SHUNT_DEFAULT 10000 /* uOhm */ 64 65 struct ina209_data { 66 struct i2c_client *client; 67 68 struct mutex update_lock; 69 bool valid; 70 unsigned long last_updated; /* in jiffies */ 71 72 u16 regs[INA209_REGISTERS]; /* All chip registers */ 73 74 u16 config_orig; /* Original configuration */ 75 u16 calibration_orig; /* Original calibration */ 76 u16 update_interval; 77 }; 78 79 static struct ina209_data *ina209_update_device(struct device *dev) 80 { 81 struct ina209_data *data = dev_get_drvdata(dev); 82 struct i2c_client *client = data->client; 83 struct ina209_data *ret = data; 84 s32 val; 85 int i; 86 87 mutex_lock(&data->update_lock); 88 89 if (!data->valid || 90 time_after(jiffies, data->last_updated + data->update_interval)) { 91 for (i = 0; i < ARRAY_SIZE(data->regs); i++) { 92 val = i2c_smbus_read_word_swapped(client, i); 93 if (val < 0) { 94 ret = ERR_PTR(val); 95 goto abort; 96 } 97 data->regs[i] = val; 98 } 99 data->last_updated = jiffies; 100 data->valid = true; 101 } 102 abort: 103 mutex_unlock(&data->update_lock); 104 return ret; 105 } 106 107 /* 108 * Read a value from a device register and convert it to the 109 * appropriate sysfs units 110 */ 111 static long ina209_from_reg(const u8 reg, const u16 val) 112 { 113 switch (reg) { 114 case INA209_SHUNT_VOLTAGE: 115 case INA209_SHUNT_VOLTAGE_POS_PEAK: 116 case INA209_SHUNT_VOLTAGE_NEG_PEAK: 117 case INA209_SHUNT_VOLTAGE_POS_WARN: 118 case INA209_SHUNT_VOLTAGE_NEG_WARN: 119 /* LSB=10 uV. Convert to mV. */ 120 return DIV_ROUND_CLOSEST((s16)val, 100); 121 122 case INA209_BUS_VOLTAGE: 123 case INA209_BUS_VOLTAGE_MAX_PEAK: 124 case INA209_BUS_VOLTAGE_MIN_PEAK: 125 case INA209_BUS_VOLTAGE_OVER_WARN: 126 case INA209_BUS_VOLTAGE_UNDER_WARN: 127 case INA209_BUS_VOLTAGE_OVER_LIMIT: 128 case INA209_BUS_VOLTAGE_UNDER_LIMIT: 129 /* LSB=4 mV, last 3 bits unused */ 130 return (val >> 3) * 4; 131 132 case INA209_CRITICAL_DAC_POS: 133 /* LSB=1 mV, in the upper 8 bits */ 134 return val >> 8; 135 136 case INA209_CRITICAL_DAC_NEG: 137 /* LSB=1 mV, in the upper 8 bits */ 138 return -1 * (val >> 8); 139 140 case INA209_POWER: 141 case INA209_POWER_PEAK: 142 case INA209_POWER_WARN: 143 case INA209_POWER_OVER_LIMIT: 144 /* LSB=20 mW. Convert to uW */ 145 return val * 20 * 1000L; 146 147 case INA209_CURRENT: 148 /* LSB=1 mA (selected). Is in mA */ 149 return (s16)val; 150 } 151 152 /* programmer goofed */ 153 WARN_ON_ONCE(1); 154 return 0; 155 } 156 157 /* 158 * Take a value and convert it to register format, clamping the value 159 * to the appropriate range. 160 */ 161 static int ina209_to_reg(u8 reg, u16 old, long val) 162 { 163 switch (reg) { 164 case INA209_SHUNT_VOLTAGE_POS_WARN: 165 case INA209_SHUNT_VOLTAGE_NEG_WARN: 166 /* Limit to +- 320 mV, 10 uV LSB */ 167 return clamp_val(val, -320, 320) * 100; 168 169 case INA209_BUS_VOLTAGE_OVER_WARN: 170 case INA209_BUS_VOLTAGE_UNDER_WARN: 171 case INA209_BUS_VOLTAGE_OVER_LIMIT: 172 case INA209_BUS_VOLTAGE_UNDER_LIMIT: 173 /* 174 * Limit to 0-32000 mV, 4 mV LSB 175 * 176 * The last three bits aren't part of the value, but we'll 177 * preserve them in their original state. 178 */ 179 return (DIV_ROUND_CLOSEST(clamp_val(val, 0, 32000), 4) << 3) 180 | (old & 0x7); 181 182 case INA209_CRITICAL_DAC_NEG: 183 /* 184 * Limit to -255-0 mV, 1 mV LSB 185 * Convert the value to a positive value for the register 186 * 187 * The value lives in the top 8 bits only, be careful 188 * and keep original value of other bits. 189 */ 190 return (clamp_val(-val, 0, 255) << 8) | (old & 0xff); 191 192 case INA209_CRITICAL_DAC_POS: 193 /* 194 * Limit to 0-255 mV, 1 mV LSB 195 * 196 * The value lives in the top 8 bits only, be careful 197 * and keep original value of other bits. 198 */ 199 return (clamp_val(val, 0, 255) << 8) | (old & 0xff); 200 201 case INA209_POWER_WARN: 202 case INA209_POWER_OVER_LIMIT: 203 /* 20 mW LSB */ 204 return DIV_ROUND_CLOSEST(val, 20 * 1000); 205 } 206 207 /* Other registers are read-only, return access error */ 208 return -EACCES; 209 } 210 211 static int ina209_interval_from_reg(u16 reg) 212 { 213 return 68 >> (15 - ((reg >> 3) & 0x0f)); 214 } 215 216 static u16 ina209_reg_from_interval(u16 config, long interval) 217 { 218 int i, adc; 219 220 if (interval <= 0) { 221 adc = 8; 222 } else { 223 adc = 15; 224 for (i = 34 + 34 / 2; i; i >>= 1) { 225 if (i < interval) 226 break; 227 adc--; 228 } 229 } 230 return (config & 0xf807) | (adc << 3) | (adc << 7); 231 } 232 233 static ssize_t ina209_interval_store(struct device *dev, 234 struct device_attribute *da, 235 const char *buf, size_t count) 236 { 237 struct ina209_data *data = ina209_update_device(dev); 238 long val; 239 u16 regval; 240 int ret; 241 242 if (IS_ERR(data)) 243 return PTR_ERR(data); 244 245 ret = kstrtol(buf, 10, &val); 246 if (ret < 0) 247 return ret; 248 249 mutex_lock(&data->update_lock); 250 regval = ina209_reg_from_interval(data->regs[INA209_CONFIGURATION], 251 val); 252 i2c_smbus_write_word_swapped(data->client, INA209_CONFIGURATION, 253 regval); 254 data->regs[INA209_CONFIGURATION] = regval; 255 data->update_interval = ina209_interval_from_reg(regval); 256 mutex_unlock(&data->update_lock); 257 return count; 258 } 259 260 static ssize_t ina209_interval_show(struct device *dev, 261 struct device_attribute *da, char *buf) 262 { 263 struct ina209_data *data = dev_get_drvdata(dev); 264 265 return snprintf(buf, PAGE_SIZE, "%d\n", data->update_interval); 266 } 267 268 /* 269 * History is reset by writing 1 into bit 0 of the respective peak register. 270 * Since more than one peak register may be affected by the scope of a 271 * reset_history attribute write, use a bit mask in attr->index to identify 272 * which registers are affected. 273 */ 274 static u16 ina209_reset_history_regs[] = { 275 INA209_SHUNT_VOLTAGE_POS_PEAK, 276 INA209_SHUNT_VOLTAGE_NEG_PEAK, 277 INA209_BUS_VOLTAGE_MAX_PEAK, 278 INA209_BUS_VOLTAGE_MIN_PEAK, 279 INA209_POWER_PEAK 280 }; 281 282 static ssize_t ina209_history_store(struct device *dev, 283 struct device_attribute *da, 284 const char *buf, size_t count) 285 { 286 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 287 struct ina209_data *data = dev_get_drvdata(dev); 288 struct i2c_client *client = data->client; 289 u32 mask = attr->index; 290 long val; 291 int i, ret; 292 293 ret = kstrtol(buf, 10, &val); 294 if (ret < 0) 295 return ret; 296 297 mutex_lock(&data->update_lock); 298 for (i = 0; i < ARRAY_SIZE(ina209_reset_history_regs); i++) { 299 if (mask & (1 << i)) 300 i2c_smbus_write_word_swapped(client, 301 ina209_reset_history_regs[i], 1); 302 } 303 data->valid = false; 304 mutex_unlock(&data->update_lock); 305 return count; 306 } 307 308 static ssize_t ina209_value_store(struct device *dev, 309 struct device_attribute *da, 310 const char *buf, size_t count) 311 { 312 struct ina209_data *data = ina209_update_device(dev); 313 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 314 int reg = attr->index; 315 long val; 316 int ret; 317 318 if (IS_ERR(data)) 319 return PTR_ERR(data); 320 321 ret = kstrtol(buf, 10, &val); 322 if (ret < 0) 323 return ret; 324 325 mutex_lock(&data->update_lock); 326 ret = ina209_to_reg(reg, data->regs[reg], val); 327 if (ret < 0) { 328 count = ret; 329 goto abort; 330 } 331 i2c_smbus_write_word_swapped(data->client, reg, ret); 332 data->regs[reg] = ret; 333 abort: 334 mutex_unlock(&data->update_lock); 335 return count; 336 } 337 338 static ssize_t ina209_value_show(struct device *dev, 339 struct device_attribute *da, char *buf) 340 { 341 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 342 struct ina209_data *data = ina209_update_device(dev); 343 long val; 344 345 if (IS_ERR(data)) 346 return PTR_ERR(data); 347 348 val = ina209_from_reg(attr->index, data->regs[attr->index]); 349 return snprintf(buf, PAGE_SIZE, "%ld\n", val); 350 } 351 352 static ssize_t ina209_alarm_show(struct device *dev, 353 struct device_attribute *da, char *buf) 354 { 355 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); 356 struct ina209_data *data = ina209_update_device(dev); 357 const unsigned int mask = attr->index; 358 u16 status; 359 360 if (IS_ERR(data)) 361 return PTR_ERR(data); 362 363 status = data->regs[INA209_STATUS]; 364 365 /* 366 * All alarms are in the INA209_STATUS register. To avoid a long 367 * switch statement, the mask is passed in attr->index 368 */ 369 return snprintf(buf, PAGE_SIZE, "%u\n", !!(status & mask)); 370 } 371 372 /* Shunt voltage, history, limits, alarms */ 373 static SENSOR_DEVICE_ATTR_RO(in0_input, ina209_value, INA209_SHUNT_VOLTAGE); 374 static SENSOR_DEVICE_ATTR_RO(in0_input_highest, ina209_value, 375 INA209_SHUNT_VOLTAGE_POS_PEAK); 376 static SENSOR_DEVICE_ATTR_RO(in0_input_lowest, ina209_value, 377 INA209_SHUNT_VOLTAGE_NEG_PEAK); 378 static SENSOR_DEVICE_ATTR_WO(in0_reset_history, ina209_history, 379 (1 << 0) | (1 << 1)); 380 static SENSOR_DEVICE_ATTR_RW(in0_max, ina209_value, 381 INA209_SHUNT_VOLTAGE_POS_WARN); 382 static SENSOR_DEVICE_ATTR_RW(in0_min, ina209_value, 383 INA209_SHUNT_VOLTAGE_NEG_WARN); 384 static SENSOR_DEVICE_ATTR_RW(in0_crit_max, ina209_value, 385 INA209_CRITICAL_DAC_POS); 386 static SENSOR_DEVICE_ATTR_RW(in0_crit_min, ina209_value, 387 INA209_CRITICAL_DAC_NEG); 388 389 static SENSOR_DEVICE_ATTR_RO(in0_min_alarm, ina209_alarm, 1 << 11); 390 static SENSOR_DEVICE_ATTR_RO(in0_max_alarm, ina209_alarm, 1 << 12); 391 static SENSOR_DEVICE_ATTR_RO(in0_crit_min_alarm, ina209_alarm, 1 << 6); 392 static SENSOR_DEVICE_ATTR_RO(in0_crit_max_alarm, ina209_alarm, 1 << 7); 393 394 /* Bus voltage, history, limits, alarms */ 395 static SENSOR_DEVICE_ATTR_RO(in1_input, ina209_value, INA209_BUS_VOLTAGE); 396 static SENSOR_DEVICE_ATTR_RO(in1_input_highest, ina209_value, 397 INA209_BUS_VOLTAGE_MAX_PEAK); 398 static SENSOR_DEVICE_ATTR_RO(in1_input_lowest, ina209_value, 399 INA209_BUS_VOLTAGE_MIN_PEAK); 400 static SENSOR_DEVICE_ATTR_WO(in1_reset_history, ina209_history, 401 (1 << 2) | (1 << 3)); 402 static SENSOR_DEVICE_ATTR_RW(in1_max, ina209_value, 403 INA209_BUS_VOLTAGE_OVER_WARN); 404 static SENSOR_DEVICE_ATTR_RW(in1_min, ina209_value, 405 INA209_BUS_VOLTAGE_UNDER_WARN); 406 static SENSOR_DEVICE_ATTR_RW(in1_crit_max, ina209_value, 407 INA209_BUS_VOLTAGE_OVER_LIMIT); 408 static SENSOR_DEVICE_ATTR_RW(in1_crit_min, ina209_value, 409 INA209_BUS_VOLTAGE_UNDER_LIMIT); 410 411 static SENSOR_DEVICE_ATTR_RO(in1_min_alarm, ina209_alarm, 1 << 14); 412 static SENSOR_DEVICE_ATTR_RO(in1_max_alarm, ina209_alarm, 1 << 15); 413 static SENSOR_DEVICE_ATTR_RO(in1_crit_min_alarm, ina209_alarm, 1 << 9); 414 static SENSOR_DEVICE_ATTR_RO(in1_crit_max_alarm, ina209_alarm, 1 << 10); 415 416 /* Power */ 417 static SENSOR_DEVICE_ATTR_RO(power1_input, ina209_value, INA209_POWER); 418 static SENSOR_DEVICE_ATTR_RO(power1_input_highest, ina209_value, 419 INA209_POWER_PEAK); 420 static SENSOR_DEVICE_ATTR_WO(power1_reset_history, ina209_history, 1 << 4); 421 static SENSOR_DEVICE_ATTR_RW(power1_max, ina209_value, INA209_POWER_WARN); 422 static SENSOR_DEVICE_ATTR_RW(power1_crit, ina209_value, 423 INA209_POWER_OVER_LIMIT); 424 425 static SENSOR_DEVICE_ATTR_RO(power1_max_alarm, ina209_alarm, 1 << 13); 426 static SENSOR_DEVICE_ATTR_RO(power1_crit_alarm, ina209_alarm, 1 << 8); 427 428 /* Current */ 429 static SENSOR_DEVICE_ATTR_RO(curr1_input, ina209_value, INA209_CURRENT); 430 431 static SENSOR_DEVICE_ATTR_RW(update_interval, ina209_interval, 0); 432 433 /* 434 * Finally, construct an array of pointers to members of the above objects, 435 * as required for sysfs_create_group() 436 */ 437 static struct attribute *ina209_attrs[] = { 438 &sensor_dev_attr_in0_input.dev_attr.attr, 439 &sensor_dev_attr_in0_input_highest.dev_attr.attr, 440 &sensor_dev_attr_in0_input_lowest.dev_attr.attr, 441 &sensor_dev_attr_in0_reset_history.dev_attr.attr, 442 &sensor_dev_attr_in0_max.dev_attr.attr, 443 &sensor_dev_attr_in0_min.dev_attr.attr, 444 &sensor_dev_attr_in0_crit_max.dev_attr.attr, 445 &sensor_dev_attr_in0_crit_min.dev_attr.attr, 446 &sensor_dev_attr_in0_max_alarm.dev_attr.attr, 447 &sensor_dev_attr_in0_min_alarm.dev_attr.attr, 448 &sensor_dev_attr_in0_crit_max_alarm.dev_attr.attr, 449 &sensor_dev_attr_in0_crit_min_alarm.dev_attr.attr, 450 451 &sensor_dev_attr_in1_input.dev_attr.attr, 452 &sensor_dev_attr_in1_input_highest.dev_attr.attr, 453 &sensor_dev_attr_in1_input_lowest.dev_attr.attr, 454 &sensor_dev_attr_in1_reset_history.dev_attr.attr, 455 &sensor_dev_attr_in1_max.dev_attr.attr, 456 &sensor_dev_attr_in1_min.dev_attr.attr, 457 &sensor_dev_attr_in1_crit_max.dev_attr.attr, 458 &sensor_dev_attr_in1_crit_min.dev_attr.attr, 459 &sensor_dev_attr_in1_max_alarm.dev_attr.attr, 460 &sensor_dev_attr_in1_min_alarm.dev_attr.attr, 461 &sensor_dev_attr_in1_crit_max_alarm.dev_attr.attr, 462 &sensor_dev_attr_in1_crit_min_alarm.dev_attr.attr, 463 464 &sensor_dev_attr_power1_input.dev_attr.attr, 465 &sensor_dev_attr_power1_input_highest.dev_attr.attr, 466 &sensor_dev_attr_power1_reset_history.dev_attr.attr, 467 &sensor_dev_attr_power1_max.dev_attr.attr, 468 &sensor_dev_attr_power1_crit.dev_attr.attr, 469 &sensor_dev_attr_power1_max_alarm.dev_attr.attr, 470 &sensor_dev_attr_power1_crit_alarm.dev_attr.attr, 471 472 &sensor_dev_attr_curr1_input.dev_attr.attr, 473 474 &sensor_dev_attr_update_interval.dev_attr.attr, 475 476 NULL, 477 }; 478 ATTRIBUTE_GROUPS(ina209); 479 480 static void ina209_restore_conf(struct i2c_client *client, 481 struct ina209_data *data) 482 { 483 /* Restore initial configuration */ 484 i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION, 485 data->config_orig); 486 i2c_smbus_write_word_swapped(client, INA209_CALIBRATION, 487 data->calibration_orig); 488 } 489 490 static int ina209_init_client(struct i2c_client *client, 491 struct ina209_data *data) 492 { 493 struct ina2xx_platform_data *pdata = dev_get_platdata(&client->dev); 494 u32 shunt; 495 int reg; 496 497 reg = i2c_smbus_read_word_swapped(client, INA209_CALIBRATION); 498 if (reg < 0) 499 return reg; 500 data->calibration_orig = reg; 501 502 reg = i2c_smbus_read_word_swapped(client, INA209_CONFIGURATION); 503 if (reg < 0) 504 return reg; 505 data->config_orig = reg; 506 507 if (pdata) { 508 if (pdata->shunt_uohms <= 0) 509 return -EINVAL; 510 shunt = pdata->shunt_uohms; 511 } else if (!of_property_read_u32(client->dev.of_node, "shunt-resistor", 512 &shunt)) { 513 if (shunt == 0) 514 return -EINVAL; 515 } else { 516 shunt = data->calibration_orig ? 517 40960000 / data->calibration_orig : INA209_SHUNT_DEFAULT; 518 } 519 520 i2c_smbus_write_word_swapped(client, INA209_CONFIGURATION, 521 INA209_CONFIG_DEFAULT); 522 data->update_interval = ina209_interval_from_reg(INA209_CONFIG_DEFAULT); 523 524 /* 525 * Calibrate current LSB to 1mA. Shunt is in uOhms. 526 * See equation 13 in datasheet. 527 */ 528 i2c_smbus_write_word_swapped(client, INA209_CALIBRATION, 529 clamp_val(40960000 / shunt, 1, 65535)); 530 531 /* Clear status register */ 532 i2c_smbus_read_word_swapped(client, INA209_STATUS); 533 534 return 0; 535 } 536 537 static int ina209_probe(struct i2c_client *client, 538 const struct i2c_device_id *id) 539 { 540 struct i2c_adapter *adapter = client->adapter; 541 struct ina209_data *data; 542 struct device *hwmon_dev; 543 int ret; 544 545 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) 546 return -ENODEV; 547 548 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 549 if (!data) 550 return -ENOMEM; 551 552 i2c_set_clientdata(client, data); 553 data->client = client; 554 mutex_init(&data->update_lock); 555 556 ret = ina209_init_client(client, data); 557 if (ret) 558 return ret; 559 560 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev, 561 client->name, 562 data, ina209_groups); 563 if (IS_ERR(hwmon_dev)) { 564 ret = PTR_ERR(hwmon_dev); 565 goto out_restore_conf; 566 } 567 568 return 0; 569 570 out_restore_conf: 571 ina209_restore_conf(client, data); 572 return ret; 573 } 574 575 static int ina209_remove(struct i2c_client *client) 576 { 577 struct ina209_data *data = i2c_get_clientdata(client); 578 579 ina209_restore_conf(client, data); 580 581 return 0; 582 } 583 584 static const struct i2c_device_id ina209_id[] = { 585 { "ina209", 0 }, 586 { } 587 }; 588 MODULE_DEVICE_TABLE(i2c, ina209_id); 589 590 static const struct of_device_id ina209_of_match[] = { 591 { .compatible = "ti,ina209" }, 592 { }, 593 }; 594 MODULE_DEVICE_TABLE(of, ina209_of_match); 595 596 /* This is the driver that will be inserted */ 597 static struct i2c_driver ina209_driver = { 598 .class = I2C_CLASS_HWMON, 599 .driver = { 600 .name = "ina209", 601 .of_match_table = of_match_ptr(ina209_of_match), 602 }, 603 .probe = ina209_probe, 604 .remove = ina209_remove, 605 .id_table = ina209_id, 606 }; 607 608 module_i2c_driver(ina209_driver); 609 610 MODULE_AUTHOR("Ira W. Snyder <iws@ovro.caltech.edu>, Paul Hays <Paul.Hays@cattail.ca>, Guenter Roeck <linux@roeck-us.net>"); 611 MODULE_DESCRIPTION("INA209 driver"); 612 MODULE_LICENSE("GPL"); 613