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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for Texas Instruments INA219, INA226 power monitor chips
4 *
5 * INA219:
6 * Zero Drift Bi-Directional Current/Power Monitor with I2C Interface
7 * Datasheet: https://www.ti.com/product/ina219
8 *
9 * INA220:
10 * Bi-Directional Current/Power Monitor with I2C Interface
11 * Datasheet: https://www.ti.com/product/ina220
12 *
13 * INA226:
14 * Bi-Directional Current/Power Monitor with I2C Interface
15 * Datasheet: https://www.ti.com/product/ina226
16 *
17 * INA230:
18 * Bi-directional Current/Power Monitor with I2C Interface
19 * Datasheet: https://www.ti.com/product/ina230
20 *
21 * Copyright (C) 2012 Lothar Felten <lothar.felten@gmail.com>
22 * Thanks to Jan Volkering
23 */
24
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/init.h>
28#include <linux/err.h>
29#include <linux/slab.h>
30#include <linux/i2c.h>
31#include <linux/hwmon.h>
32#include <linux/hwmon-sysfs.h>
33#include <linux/jiffies.h>
34#include <linux/of.h>
35#include <linux/delay.h>
36#include <linux/util_macros.h>
37#include <linux/regmap.h>
38
39#include <linux/platform_data/ina2xx.h>
40
41/* common register definitions */
42#define INA2XX_CONFIG 0x00
43#define INA2XX_SHUNT_VOLTAGE 0x01 /* readonly */
44#define INA2XX_BUS_VOLTAGE 0x02 /* readonly */
45#define INA2XX_POWER 0x03 /* readonly */
46#define INA2XX_CURRENT 0x04 /* readonly */
47#define INA2XX_CALIBRATION 0x05
48
49/* INA226 register definitions */
50#define INA226_MASK_ENABLE 0x06
51#define INA226_ALERT_LIMIT 0x07
52#define INA226_DIE_ID 0xFF
53
54/* register count */
55#define INA219_REGISTERS 6
56#define INA226_REGISTERS 8
57
58#define INA2XX_MAX_REGISTERS 8
59
60/* settings - depend on use case */
61#define INA219_CONFIG_DEFAULT 0x399F /* PGA=8 */
62#define INA226_CONFIG_DEFAULT 0x4527 /* averages=16 */
63
64/* worst case is 68.10 ms (~14.6Hz, ina219) */
65#define INA2XX_CONVERSION_RATE 15
66#define INA2XX_MAX_DELAY 69 /* worst case delay in ms */
67
68#define INA2XX_RSHUNT_DEFAULT 10000
69
70/* bit mask for reading the averaging setting in the configuration register */
71#define INA226_AVG_RD_MASK 0x0E00
72
73#define INA226_READ_AVG(reg) (((reg) & INA226_AVG_RD_MASK) >> 9)
74#define INA226_SHIFT_AVG(val) ((val) << 9)
75
76/* bit number of alert functions in Mask/Enable Register */
77#define INA226_SHUNT_OVER_VOLTAGE_BIT 15
78#define INA226_SHUNT_UNDER_VOLTAGE_BIT 14
79#define INA226_BUS_OVER_VOLTAGE_BIT 13
80#define INA226_BUS_UNDER_VOLTAGE_BIT 12
81#define INA226_POWER_OVER_LIMIT_BIT 11
82
83/* bit mask for alert config bits of Mask/Enable Register */
84#define INA226_ALERT_CONFIG_MASK 0xFC00
85#define INA226_ALERT_FUNCTION_FLAG BIT(4)
86
87/* common attrs, ina226 attrs and NULL */
88#define INA2XX_MAX_ATTRIBUTE_GROUPS 3
89
90/*
91 * Both bus voltage and shunt voltage conversion times for ina226 are set
92 * to 0b0100 on POR, which translates to 2200 microseconds in total.
93 */
94#define INA226_TOTAL_CONV_TIME_DEFAULT 2200
95
96static struct regmap_config ina2xx_regmap_config = {
97 .reg_bits = 8,
98 .val_bits = 16,
99};
100
101enum ina2xx_ids { ina219, ina226 };
102
103struct ina2xx_config {
104 u16 config_default;
105 int calibration_value;
106 int registers;
107 int shunt_div;
108 int bus_voltage_shift;
109 int bus_voltage_lsb; /* uV */
110 int power_lsb_factor;
111};
112
113struct ina2xx_data {
114 const struct ina2xx_config *config;
115
116 long rshunt;
117 long current_lsb_uA;
118 long power_lsb_uW;
119 struct mutex config_lock;
120 struct regmap *regmap;
121
122 const struct attribute_group *groups[INA2XX_MAX_ATTRIBUTE_GROUPS];
123};
124
125static const struct ina2xx_config ina2xx_config[] = {
126 [ina219] = {
127 .config_default = INA219_CONFIG_DEFAULT,
128 .calibration_value = 4096,
129 .registers = INA219_REGISTERS,
130 .shunt_div = 100,
131 .bus_voltage_shift = 3,
132 .bus_voltage_lsb = 4000,
133 .power_lsb_factor = 20,
134 },
135 [ina226] = {
136 .config_default = INA226_CONFIG_DEFAULT,
137 .calibration_value = 2048,
138 .registers = INA226_REGISTERS,
139 .shunt_div = 400,
140 .bus_voltage_shift = 0,
141 .bus_voltage_lsb = 1250,
142 .power_lsb_factor = 25,
143 },
144};
145
146/*
147 * Available averaging rates for ina226. The indices correspond with
148 * the bit values expected by the chip (according to the ina226 datasheet,
149 * table 3 AVG bit settings, found at
150 * https://www.ti.com/lit/ds/symlink/ina226.pdf.
151 */
152static const int ina226_avg_tab[] = { 1, 4, 16, 64, 128, 256, 512, 1024 };
153
154static int ina226_reg_to_interval(u16 config)
155{
156 int avg = ina226_avg_tab[INA226_READ_AVG(config)];
157
158 /*
159 * Multiply the total conversion time by the number of averages.
160 * Return the result in milliseconds.
161 */
162 return DIV_ROUND_CLOSEST(avg * INA226_TOTAL_CONV_TIME_DEFAULT, 1000);
163}
164
165/*
166 * Return the new, shifted AVG field value of CONFIG register,
167 * to use with regmap_update_bits
168 */
169static u16 ina226_interval_to_reg(int interval)
170{
171 int avg, avg_bits;
172
173 avg = DIV_ROUND_CLOSEST(interval * 1000,
174 INA226_TOTAL_CONV_TIME_DEFAULT);
175 avg_bits = find_closest(avg, ina226_avg_tab,
176 ARRAY_SIZE(ina226_avg_tab));
177
178 return INA226_SHIFT_AVG(avg_bits);
179}
180
181/*
182 * Calibration register is set to the best value, which eliminates
183 * truncation errors on calculating current register in hardware.
184 * According to datasheet (eq. 3) the best values are 2048 for
185 * ina226 and 4096 for ina219. They are hardcoded as calibration_value.
186 */
187static int ina2xx_calibrate(struct ina2xx_data *data)
188{
189 return regmap_write(data->regmap, INA2XX_CALIBRATION,
190 data->config->calibration_value);
191}
192
193/*
194 * Initialize the configuration and calibration registers.
195 */
196static int ina2xx_init(struct ina2xx_data *data)
197{
198 int ret = regmap_write(data->regmap, INA2XX_CONFIG,
199 data->config->config_default);
200 if (ret < 0)
201 return ret;
202
203 return ina2xx_calibrate(data);
204}
205
206static int ina2xx_read_reg(struct device *dev, int reg, unsigned int *regval)
207{
208 struct ina2xx_data *data = dev_get_drvdata(dev);
209 int ret, retry;
210
211 dev_dbg(dev, "Starting register %d read\n", reg);
212
213 for (retry = 5; retry; retry--) {
214
215 ret = regmap_read(data->regmap, reg, regval);
216 if (ret < 0)
217 return ret;
218
219 dev_dbg(dev, "read %d, val = 0x%04x\n", reg, *regval);
220
221 /*
222 * If the current value in the calibration register is 0, the
223 * power and current registers will also remain at 0. In case
224 * the chip has been reset let's check the calibration
225 * register and reinitialize if needed.
226 * We do that extra read of the calibration register if there
227 * is some hint of a chip reset.
228 */
229 if (*regval == 0) {
230 unsigned int cal;
231
232 ret = regmap_read(data->regmap, INA2XX_CALIBRATION,
233 &cal);
234 if (ret < 0)
235 return ret;
236
237 if (cal == 0) {
238 dev_warn(dev, "chip not calibrated, reinitializing\n");
239
240 ret = ina2xx_init(data);
241 if (ret < 0)
242 return ret;
243 /*
244 * Let's make sure the power and current
245 * registers have been updated before trying
246 * again.
247 */
248 msleep(INA2XX_MAX_DELAY);
249 continue;
250 }
251 }
252 return 0;
253 }
254
255 /*
256 * If we're here then although all write operations succeeded, the
257 * chip still returns 0 in the calibration register. Nothing more we
258 * can do here.
259 */
260 dev_err(dev, "unable to reinitialize the chip\n");
261 return -ENODEV;
262}
263
264static int ina2xx_get_value(struct ina2xx_data *data, u8 reg,
265 unsigned int regval)
266{
267 int val;
268
269 switch (reg) {
270 case INA2XX_SHUNT_VOLTAGE:
271 /* signed register */
272 val = DIV_ROUND_CLOSEST((s16)regval, data->config->shunt_div);
273 break;
274 case INA2XX_BUS_VOLTAGE:
275 val = (regval >> data->config->bus_voltage_shift)
276 * data->config->bus_voltage_lsb;
277 val = DIV_ROUND_CLOSEST(val, 1000);
278 break;
279 case INA2XX_POWER:
280 val = regval * data->power_lsb_uW;
281 break;
282 case INA2XX_CURRENT:
283 /* signed register, result in mA */
284 val = (s16)regval * data->current_lsb_uA;
285 val = DIV_ROUND_CLOSEST(val, 1000);
286 break;
287 case INA2XX_CALIBRATION:
288 val = regval;
289 break;
290 default:
291 /* programmer goofed */
292 WARN_ON_ONCE(1);
293 val = 0;
294 break;
295 }
296
297 return val;
298}
299
300static ssize_t ina2xx_value_show(struct device *dev,
301 struct device_attribute *da, char *buf)
302{
303 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
304 struct ina2xx_data *data = dev_get_drvdata(dev);
305 unsigned int regval;
306
307 int err = ina2xx_read_reg(dev, attr->index, ®val);
308
309 if (err < 0)
310 return err;
311
312 return sysfs_emit(buf, "%d\n", ina2xx_get_value(data, attr->index, regval));
313}
314
315static int ina226_reg_to_alert(struct ina2xx_data *data, u8 bit, u16 regval)
316{
317 int reg;
318
319 switch (bit) {
320 case INA226_SHUNT_OVER_VOLTAGE_BIT:
321 case INA226_SHUNT_UNDER_VOLTAGE_BIT:
322 reg = INA2XX_SHUNT_VOLTAGE;
323 break;
324 case INA226_BUS_OVER_VOLTAGE_BIT:
325 case INA226_BUS_UNDER_VOLTAGE_BIT:
326 reg = INA2XX_BUS_VOLTAGE;
327 break;
328 case INA226_POWER_OVER_LIMIT_BIT:
329 reg = INA2XX_POWER;
330 break;
331 default:
332 /* programmer goofed */
333 WARN_ON_ONCE(1);
334 return 0;
335 }
336
337 return ina2xx_get_value(data, reg, regval);
338}
339
340/*
341 * Turns alert limit values into register values.
342 * Opposite of the formula in ina2xx_get_value().
343 */
344static s16 ina226_alert_to_reg(struct ina2xx_data *data, u8 bit, int val)
345{
346 switch (bit) {
347 case INA226_SHUNT_OVER_VOLTAGE_BIT:
348 case INA226_SHUNT_UNDER_VOLTAGE_BIT:
349 val *= data->config->shunt_div;
350 return clamp_val(val, SHRT_MIN, SHRT_MAX);
351 case INA226_BUS_OVER_VOLTAGE_BIT:
352 case INA226_BUS_UNDER_VOLTAGE_BIT:
353 val = (val * 1000) << data->config->bus_voltage_shift;
354 val = DIV_ROUND_CLOSEST(val, data->config->bus_voltage_lsb);
355 return clamp_val(val, 0, SHRT_MAX);
356 case INA226_POWER_OVER_LIMIT_BIT:
357 val = DIV_ROUND_CLOSEST(val, data->power_lsb_uW);
358 return clamp_val(val, 0, USHRT_MAX);
359 default:
360 /* programmer goofed */
361 WARN_ON_ONCE(1);
362 return 0;
363 }
364}
365
366static ssize_t ina226_alert_show(struct device *dev,
367 struct device_attribute *da, char *buf)
368{
369 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
370 struct ina2xx_data *data = dev_get_drvdata(dev);
371 int regval;
372 int val = 0;
373 int ret;
374
375 mutex_lock(&data->config_lock);
376 ret = regmap_read(data->regmap, INA226_MASK_ENABLE, ®val);
377 if (ret)
378 goto abort;
379
380 if (regval & BIT(attr->index)) {
381 ret = regmap_read(data->regmap, INA226_ALERT_LIMIT, ®val);
382 if (ret)
383 goto abort;
384 val = ina226_reg_to_alert(data, attr->index, regval);
385 }
386
387 ret = sysfs_emit(buf, "%d\n", val);
388abort:
389 mutex_unlock(&data->config_lock);
390 return ret;
391}
392
393static ssize_t ina226_alert_store(struct device *dev,
394 struct device_attribute *da,
395 const char *buf, size_t count)
396{
397 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
398 struct ina2xx_data *data = dev_get_drvdata(dev);
399 unsigned long val;
400 int ret;
401
402 ret = kstrtoul(buf, 10, &val);
403 if (ret < 0)
404 return ret;
405
406 /*
407 * Clear all alerts first to avoid accidentally triggering ALERT pin
408 * due to register write sequence. Then, only enable the alert
409 * if the value is non-zero.
410 */
411 mutex_lock(&data->config_lock);
412 ret = regmap_update_bits(data->regmap, INA226_MASK_ENABLE,
413 INA226_ALERT_CONFIG_MASK, 0);
414 if (ret < 0)
415 goto abort;
416
417 ret = regmap_write(data->regmap, INA226_ALERT_LIMIT,
418 ina226_alert_to_reg(data, attr->index, val));
419 if (ret < 0)
420 goto abort;
421
422 if (val != 0) {
423 ret = regmap_update_bits(data->regmap, INA226_MASK_ENABLE,
424 INA226_ALERT_CONFIG_MASK,
425 BIT(attr->index));
426 if (ret < 0)
427 goto abort;
428 }
429
430 ret = count;
431abort:
432 mutex_unlock(&data->config_lock);
433 return ret;
434}
435
436static ssize_t ina226_alarm_show(struct device *dev,
437 struct device_attribute *da, char *buf)
438{
439 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
440 struct ina2xx_data *data = dev_get_drvdata(dev);
441 int regval;
442 int alarm = 0;
443 int ret;
444
445 ret = regmap_read(data->regmap, INA226_MASK_ENABLE, ®val);
446 if (ret)
447 return ret;
448
449 alarm = (regval & BIT(attr->index)) &&
450 (regval & INA226_ALERT_FUNCTION_FLAG);
451 return sysfs_emit(buf, "%d\n", alarm);
452}
453
454/*
455 * In order to keep calibration register value fixed, the product
456 * of current_lsb and shunt_resistor should also be fixed and equal
457 * to shunt_voltage_lsb = 1 / shunt_div multiplied by 10^9 in order
458 * to keep the scale.
459 */
460static int ina2xx_set_shunt(struct ina2xx_data *data, long val)
461{
462 unsigned int dividend = DIV_ROUND_CLOSEST(1000000000,
463 data->config->shunt_div);
464 if (val <= 0 || val > dividend)
465 return -EINVAL;
466
467 mutex_lock(&data->config_lock);
468 data->rshunt = val;
469 data->current_lsb_uA = DIV_ROUND_CLOSEST(dividend, val);
470 data->power_lsb_uW = data->config->power_lsb_factor *
471 data->current_lsb_uA;
472 mutex_unlock(&data->config_lock);
473
474 return 0;
475}
476
477static ssize_t ina2xx_shunt_show(struct device *dev,
478 struct device_attribute *da, char *buf)
479{
480 struct ina2xx_data *data = dev_get_drvdata(dev);
481
482 return sysfs_emit(buf, "%li\n", data->rshunt);
483}
484
485static ssize_t ina2xx_shunt_store(struct device *dev,
486 struct device_attribute *da,
487 const char *buf, size_t count)
488{
489 unsigned long val;
490 int status;
491 struct ina2xx_data *data = dev_get_drvdata(dev);
492
493 status = kstrtoul(buf, 10, &val);
494 if (status < 0)
495 return status;
496
497 status = ina2xx_set_shunt(data, val);
498 if (status < 0)
499 return status;
500 return count;
501}
502
503static ssize_t ina226_interval_store(struct device *dev,
504 struct device_attribute *da,
505 const char *buf, size_t count)
506{
507 struct ina2xx_data *data = dev_get_drvdata(dev);
508 unsigned long val;
509 int status;
510
511 status = kstrtoul(buf, 10, &val);
512 if (status < 0)
513 return status;
514
515 if (val > INT_MAX || val == 0)
516 return -EINVAL;
517
518 status = regmap_update_bits(data->regmap, INA2XX_CONFIG,
519 INA226_AVG_RD_MASK,
520 ina226_interval_to_reg(val));
521 if (status < 0)
522 return status;
523
524 return count;
525}
526
527static ssize_t ina226_interval_show(struct device *dev,
528 struct device_attribute *da, char *buf)
529{
530 struct ina2xx_data *data = dev_get_drvdata(dev);
531 int status;
532 unsigned int regval;
533
534 status = regmap_read(data->regmap, INA2XX_CONFIG, ®val);
535 if (status)
536 return status;
537
538 return sysfs_emit(buf, "%d\n", ina226_reg_to_interval(regval));
539}
540
541/* shunt voltage */
542static SENSOR_DEVICE_ATTR_RO(in0_input, ina2xx_value, INA2XX_SHUNT_VOLTAGE);
543/* shunt voltage over/under voltage alert setting and alarm */
544static SENSOR_DEVICE_ATTR_RW(in0_crit, ina226_alert,
545 INA226_SHUNT_OVER_VOLTAGE_BIT);
546static SENSOR_DEVICE_ATTR_RW(in0_lcrit, ina226_alert,
547 INA226_SHUNT_UNDER_VOLTAGE_BIT);
548static SENSOR_DEVICE_ATTR_RO(in0_crit_alarm, ina226_alarm,
549 INA226_SHUNT_OVER_VOLTAGE_BIT);
550static SENSOR_DEVICE_ATTR_RO(in0_lcrit_alarm, ina226_alarm,
551 INA226_SHUNT_UNDER_VOLTAGE_BIT);
552
553/* bus voltage */
554static SENSOR_DEVICE_ATTR_RO(in1_input, ina2xx_value, INA2XX_BUS_VOLTAGE);
555/* bus voltage over/under voltage alert setting and alarm */
556static SENSOR_DEVICE_ATTR_RW(in1_crit, ina226_alert,
557 INA226_BUS_OVER_VOLTAGE_BIT);
558static SENSOR_DEVICE_ATTR_RW(in1_lcrit, ina226_alert,
559 INA226_BUS_UNDER_VOLTAGE_BIT);
560static SENSOR_DEVICE_ATTR_RO(in1_crit_alarm, ina226_alarm,
561 INA226_BUS_OVER_VOLTAGE_BIT);
562static SENSOR_DEVICE_ATTR_RO(in1_lcrit_alarm, ina226_alarm,
563 INA226_BUS_UNDER_VOLTAGE_BIT);
564
565/* calculated current */
566static SENSOR_DEVICE_ATTR_RO(curr1_input, ina2xx_value, INA2XX_CURRENT);
567
568/* calculated power */
569static SENSOR_DEVICE_ATTR_RO(power1_input, ina2xx_value, INA2XX_POWER);
570/* over-limit power alert setting and alarm */
571static SENSOR_DEVICE_ATTR_RW(power1_crit, ina226_alert,
572 INA226_POWER_OVER_LIMIT_BIT);
573static SENSOR_DEVICE_ATTR_RO(power1_crit_alarm, ina226_alarm,
574 INA226_POWER_OVER_LIMIT_BIT);
575
576/* shunt resistance */
577static SENSOR_DEVICE_ATTR_RW(shunt_resistor, ina2xx_shunt, INA2XX_CALIBRATION);
578
579/* update interval (ina226 only) */
580static SENSOR_DEVICE_ATTR_RW(update_interval, ina226_interval, 0);
581
582/* pointers to created device attributes */
583static struct attribute *ina2xx_attrs[] = {
584 &sensor_dev_attr_in0_input.dev_attr.attr,
585 &sensor_dev_attr_in1_input.dev_attr.attr,
586 &sensor_dev_attr_curr1_input.dev_attr.attr,
587 &sensor_dev_attr_power1_input.dev_attr.attr,
588 &sensor_dev_attr_shunt_resistor.dev_attr.attr,
589 NULL,
590};
591
592static const struct attribute_group ina2xx_group = {
593 .attrs = ina2xx_attrs,
594};
595
596static struct attribute *ina226_attrs[] = {
597 &sensor_dev_attr_in0_crit.dev_attr.attr,
598 &sensor_dev_attr_in0_lcrit.dev_attr.attr,
599 &sensor_dev_attr_in0_crit_alarm.dev_attr.attr,
600 &sensor_dev_attr_in0_lcrit_alarm.dev_attr.attr,
601 &sensor_dev_attr_in1_crit.dev_attr.attr,
602 &sensor_dev_attr_in1_lcrit.dev_attr.attr,
603 &sensor_dev_attr_in1_crit_alarm.dev_attr.attr,
604 &sensor_dev_attr_in1_lcrit_alarm.dev_attr.attr,
605 &sensor_dev_attr_power1_crit.dev_attr.attr,
606 &sensor_dev_attr_power1_crit_alarm.dev_attr.attr,
607 &sensor_dev_attr_update_interval.dev_attr.attr,
608 NULL,
609};
610
611static const struct attribute_group ina226_group = {
612 .attrs = ina226_attrs,
613};
614
615static const struct i2c_device_id ina2xx_id[];
616
617static int ina2xx_probe(struct i2c_client *client)
618{
619 struct device *dev = &client->dev;
620 struct ina2xx_data *data;
621 struct device *hwmon_dev;
622 u32 val;
623 int ret, group = 0;
624 enum ina2xx_ids chip;
625
626 if (client->dev.of_node)
627 chip = (uintptr_t)of_device_get_match_data(&client->dev);
628 else
629 chip = i2c_match_id(ina2xx_id, client)->driver_data;
630
631 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
632 if (!data)
633 return -ENOMEM;
634
635 /* set the device type */
636 data->config = &ina2xx_config[chip];
637 mutex_init(&data->config_lock);
638
639 if (of_property_read_u32(dev->of_node, "shunt-resistor", &val) < 0) {
640 struct ina2xx_platform_data *pdata = dev_get_platdata(dev);
641
642 if (pdata)
643 val = pdata->shunt_uohms;
644 else
645 val = INA2XX_RSHUNT_DEFAULT;
646 }
647
648 ina2xx_set_shunt(data, val);
649
650 ina2xx_regmap_config.max_register = data->config->registers;
651
652 data->regmap = devm_regmap_init_i2c(client, &ina2xx_regmap_config);
653 if (IS_ERR(data->regmap)) {
654 dev_err(dev, "failed to allocate register map\n");
655 return PTR_ERR(data->regmap);
656 }
657
658 ret = devm_regulator_get_enable(dev, "vs");
659 if (ret)
660 return dev_err_probe(dev, ret, "failed to enable vs regulator\n");
661
662 ret = ina2xx_init(data);
663 if (ret < 0) {
664 dev_err(dev, "error configuring the device: %d\n", ret);
665 return -ENODEV;
666 }
667
668 data->groups[group++] = &ina2xx_group;
669 if (chip == ina226)
670 data->groups[group++] = &ina226_group;
671
672 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
673 data, data->groups);
674 if (IS_ERR(hwmon_dev))
675 return PTR_ERR(hwmon_dev);
676
677 dev_info(dev, "power monitor %s (Rshunt = %li uOhm)\n",
678 client->name, data->rshunt);
679
680 return 0;
681}
682
683static const struct i2c_device_id ina2xx_id[] = {
684 { "ina219", ina219 },
685 { "ina220", ina219 },
686 { "ina226", ina226 },
687 { "ina230", ina226 },
688 { "ina231", ina226 },
689 { }
690};
691MODULE_DEVICE_TABLE(i2c, ina2xx_id);
692
693static const struct of_device_id __maybe_unused ina2xx_of_match[] = {
694 {
695 .compatible = "ti,ina219",
696 .data = (void *)ina219
697 },
698 {
699 .compatible = "ti,ina220",
700 .data = (void *)ina219
701 },
702 {
703 .compatible = "ti,ina226",
704 .data = (void *)ina226
705 },
706 {
707 .compatible = "ti,ina230",
708 .data = (void *)ina226
709 },
710 {
711 .compatible = "ti,ina231",
712 .data = (void *)ina226
713 },
714 { },
715};
716MODULE_DEVICE_TABLE(of, ina2xx_of_match);
717
718static struct i2c_driver ina2xx_driver = {
719 .driver = {
720 .name = "ina2xx",
721 .of_match_table = of_match_ptr(ina2xx_of_match),
722 },
723 .probe = ina2xx_probe,
724 .id_table = ina2xx_id,
725};
726
727module_i2c_driver(ina2xx_driver);
728
729MODULE_AUTHOR("Lothar Felten <l-felten@ti.com>");
730MODULE_DESCRIPTION("ina2xx driver");
731MODULE_LICENSE("GPL");