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f7c2fe38 FL |
1 | /* |
2 | * Driver for Texas Instruments INA219, INA226 power monitor chips | |
3 | * | |
4 | * INA219: | |
5 | * Zero Drift Bi-Directional Current/Power Monitor with I2C Interface | |
6 | * Datasheet: http://www.ti.com/product/ina219 | |
7 | * | |
dc92cd0c GR |
8 | * INA220: |
9 | * Bi-Directional Current/Power Monitor with I2C Interface | |
10 | * Datasheet: http://www.ti.com/product/ina220 | |
11 | * | |
f7c2fe38 FL |
12 | * INA226: |
13 | * Bi-Directional Current/Power Monitor with I2C Interface | |
14 | * Datasheet: http://www.ti.com/product/ina226 | |
15 | * | |
dc92cd0c GR |
16 | * INA230: |
17 | * Bi-directional Current/Power Monitor with I2C Interface | |
18 | * Datasheet: http://www.ti.com/product/ina230 | |
19 | * | |
f7c2fe38 FL |
20 | * Copyright (C) 2012 Lothar Felten <l-felten@ti.com> |
21 | * Thanks to Jan Volkering | |
22 | * | |
23 | * This program is free software; you can redistribute it and/or modify | |
24 | * it under the terms of the GNU General Public License as published by | |
25 | * the Free Software Foundation; version 2 of the License. | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/err.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/i2c.h> | |
34 | #include <linux/hwmon.h> | |
35 | #include <linux/hwmon-sysfs.h> | |
dcd8f392 | 36 | #include <linux/jiffies.h> |
31e7ad74 | 37 | #include <linux/of.h> |
509416a8 | 38 | #include <linux/delay.h> |
d38df34e | 39 | #include <linux/util_macros.h> |
f7c2fe38 FL |
40 | |
41 | #include <linux/platform_data/ina2xx.h> | |
42 | ||
43 | /* common register definitions */ | |
44 | #define INA2XX_CONFIG 0x00 | |
45 | #define INA2XX_SHUNT_VOLTAGE 0x01 /* readonly */ | |
46 | #define INA2XX_BUS_VOLTAGE 0x02 /* readonly */ | |
47 | #define INA2XX_POWER 0x03 /* readonly */ | |
48 | #define INA2XX_CURRENT 0x04 /* readonly */ | |
49 | #define INA2XX_CALIBRATION 0x05 | |
50 | ||
51 | /* INA226 register definitions */ | |
52 | #define INA226_MASK_ENABLE 0x06 | |
53 | #define INA226_ALERT_LIMIT 0x07 | |
54 | #define INA226_DIE_ID 0xFF | |
55 | ||
f7c2fe38 FL |
56 | /* register count */ |
57 | #define INA219_REGISTERS 6 | |
58 | #define INA226_REGISTERS 8 | |
59 | ||
60 | #define INA2XX_MAX_REGISTERS 8 | |
61 | ||
62 | /* settings - depend on use case */ | |
63 | #define INA219_CONFIG_DEFAULT 0x399F /* PGA=8 */ | |
64 | #define INA226_CONFIG_DEFAULT 0x4527 /* averages=16 */ | |
65 | ||
66 | /* worst case is 68.10 ms (~14.6Hz, ina219) */ | |
67 | #define INA2XX_CONVERSION_RATE 15 | |
509416a8 BG |
68 | #define INA2XX_MAX_DELAY 69 /* worst case delay in ms */ |
69 | ||
70 | #define INA2XX_RSHUNT_DEFAULT 10000 | |
f7c2fe38 | 71 | |
72a87a47 BG |
72 | /* bit mask for reading the averaging setting in the configuration register */ |
73 | #define INA226_AVG_RD_MASK 0x0E00 | |
74 | ||
75 | #define INA226_READ_AVG(reg) (((reg) & INA226_AVG_RD_MASK) >> 9) | |
76 | #define INA226_SHIFT_AVG(val) ((val) << 9) | |
77 | ||
78 | /* common attrs, ina226 attrs and NULL */ | |
79 | #define INA2XX_MAX_ATTRIBUTE_GROUPS 3 | |
80 | ||
81 | /* | |
82 | * Both bus voltage and shunt voltage conversion times for ina226 are set | |
83 | * to 0b0100 on POR, which translates to 2200 microseconds in total. | |
84 | */ | |
85 | #define INA226_TOTAL_CONV_TIME_DEFAULT 2200 | |
86 | ||
f7c2fe38 FL |
87 | enum ina2xx_ids { ina219, ina226 }; |
88 | ||
6106db25 GR |
89 | struct ina2xx_config { |
90 | u16 config_default; | |
91 | int calibration_factor; | |
92 | int registers; | |
93 | int shunt_div; | |
94 | int bus_voltage_shift; | |
95 | int bus_voltage_lsb; /* uV */ | |
96 | int power_lsb; /* uW */ | |
97 | }; | |
98 | ||
f7c2fe38 | 99 | struct ina2xx_data { |
468bf0e3 | 100 | struct i2c_client *client; |
6106db25 | 101 | const struct ina2xx_config *config; |
f7c2fe38 | 102 | |
509416a8 | 103 | long rshunt; |
72a87a47 | 104 | u16 curr_config; |
509416a8 | 105 | |
f7c2fe38 FL |
106 | struct mutex update_lock; |
107 | bool valid; | |
108 | unsigned long last_updated; | |
72a87a47 | 109 | int update_interval; /* in jiffies */ |
f7c2fe38 FL |
110 | |
111 | int kind; | |
72a87a47 | 112 | const struct attribute_group *groups[INA2XX_MAX_ATTRIBUTE_GROUPS]; |
f7c2fe38 FL |
113 | u16 regs[INA2XX_MAX_REGISTERS]; |
114 | }; | |
115 | ||
6106db25 GR |
116 | static const struct ina2xx_config ina2xx_config[] = { |
117 | [ina219] = { | |
118 | .config_default = INA219_CONFIG_DEFAULT, | |
119 | .calibration_factor = 40960000, | |
120 | .registers = INA219_REGISTERS, | |
121 | .shunt_div = 100, | |
122 | .bus_voltage_shift = 3, | |
123 | .bus_voltage_lsb = 4000, | |
124 | .power_lsb = 20000, | |
125 | }, | |
126 | [ina226] = { | |
127 | .config_default = INA226_CONFIG_DEFAULT, | |
128 | .calibration_factor = 5120000, | |
129 | .registers = INA226_REGISTERS, | |
130 | .shunt_div = 400, | |
131 | .bus_voltage_shift = 0, | |
132 | .bus_voltage_lsb = 1250, | |
133 | .power_lsb = 25000, | |
134 | }, | |
135 | }; | |
136 | ||
72a87a47 BG |
137 | /* |
138 | * Available averaging rates for ina226. The indices correspond with | |
139 | * the bit values expected by the chip (according to the ina226 datasheet, | |
140 | * table 3 AVG bit settings, found at | |
141 | * http://www.ti.com/lit/ds/symlink/ina226.pdf. | |
142 | */ | |
143 | static const int ina226_avg_tab[] = { 1, 4, 16, 64, 128, 256, 512, 1024 }; | |
144 | ||
72a87a47 BG |
145 | static int ina226_reg_to_interval(u16 config) |
146 | { | |
147 | int avg = ina226_avg_tab[INA226_READ_AVG(config)]; | |
148 | ||
149 | /* | |
150 | * Multiply the total conversion time by the number of averages. | |
151 | * Return the result in milliseconds. | |
152 | */ | |
153 | return DIV_ROUND_CLOSEST(avg * INA226_TOTAL_CONV_TIME_DEFAULT, 1000); | |
154 | } | |
155 | ||
156 | static u16 ina226_interval_to_reg(int interval, u16 config) | |
157 | { | |
158 | int avg, avg_bits; | |
159 | ||
160 | avg = DIV_ROUND_CLOSEST(interval * 1000, | |
161 | INA226_TOTAL_CONV_TIME_DEFAULT); | |
d38df34e BG |
162 | avg_bits = find_closest(avg, ina226_avg_tab, |
163 | ARRAY_SIZE(ina226_avg_tab)); | |
72a87a47 BG |
164 | |
165 | return (config & ~INA226_AVG_RD_MASK) | INA226_SHIFT_AVG(avg_bits); | |
166 | } | |
167 | ||
168 | static void ina226_set_update_interval(struct ina2xx_data *data) | |
169 | { | |
170 | int ms; | |
171 | ||
172 | ms = ina226_reg_to_interval(data->curr_config); | |
173 | data->update_interval = msecs_to_jiffies(ms); | |
174 | } | |
175 | ||
8a5fc795 BG |
176 | static int ina2xx_calibrate(struct ina2xx_data *data) |
177 | { | |
b721fe2a BG |
178 | u16 val = DIV_ROUND_CLOSEST(data->config->calibration_factor, |
179 | data->rshunt); | |
180 | ||
181 | return i2c_smbus_write_word_swapped(data->client, | |
182 | INA2XX_CALIBRATION, val); | |
8a5fc795 BG |
183 | } |
184 | ||
509416a8 BG |
185 | /* |
186 | * Initialize the configuration and calibration registers. | |
187 | */ | |
188 | static int ina2xx_init(struct ina2xx_data *data) | |
f7c2fe38 | 189 | { |
468bf0e3 | 190 | struct i2c_client *client = data->client; |
509416a8 | 191 | int ret; |
f7c2fe38 | 192 | |
509416a8 BG |
193 | /* device configuration */ |
194 | ret = i2c_smbus_write_word_swapped(client, INA2XX_CONFIG, | |
72a87a47 | 195 | data->curr_config); |
509416a8 BG |
196 | if (ret < 0) |
197 | return ret; | |
f7c2fe38 | 198 | |
509416a8 BG |
199 | /* |
200 | * Set current LSB to 1mA, shunt is in uOhms | |
201 | * (equation 13 in datasheet). | |
202 | */ | |
8a5fc795 | 203 | return ina2xx_calibrate(data); |
509416a8 | 204 | } |
f7c2fe38 | 205 | |
509416a8 BG |
206 | static int ina2xx_do_update(struct device *dev) |
207 | { | |
208 | struct ina2xx_data *data = dev_get_drvdata(dev); | |
209 | struct i2c_client *client = data->client; | |
210 | int i, rv, retry; | |
f7c2fe38 | 211 | |
509416a8 | 212 | dev_dbg(&client->dev, "Starting ina2xx update\n"); |
f7c2fe38 | 213 | |
509416a8 | 214 | for (retry = 5; retry; retry--) { |
f7c2fe38 | 215 | /* Read all registers */ |
6106db25 | 216 | for (i = 0; i < data->config->registers; i++) { |
509416a8 BG |
217 | rv = i2c_smbus_read_word_swapped(client, i); |
218 | if (rv < 0) | |
219 | return rv; | |
f7c2fe38 FL |
220 | data->regs[i] = rv; |
221 | } | |
509416a8 BG |
222 | |
223 | /* | |
224 | * If the current value in the calibration register is 0, the | |
225 | * power and current registers will also remain at 0. In case | |
226 | * the chip has been reset let's check the calibration | |
227 | * register and reinitialize if needed. | |
228 | */ | |
229 | if (data->regs[INA2XX_CALIBRATION] == 0) { | |
230 | dev_warn(dev, "chip not calibrated, reinitializing\n"); | |
231 | ||
232 | rv = ina2xx_init(data); | |
233 | if (rv < 0) | |
234 | return rv; | |
235 | ||
236 | /* | |
237 | * Let's make sure the power and current registers | |
238 | * have been updated before trying again. | |
239 | */ | |
240 | msleep(INA2XX_MAX_DELAY); | |
241 | continue; | |
242 | } | |
243 | ||
f7c2fe38 FL |
244 | data->last_updated = jiffies; |
245 | data->valid = 1; | |
509416a8 BG |
246 | |
247 | return 0; | |
f7c2fe38 | 248 | } |
509416a8 BG |
249 | |
250 | /* | |
251 | * If we're here then although all write operations succeeded, the | |
252 | * chip still returns 0 in the calibration register. Nothing more we | |
253 | * can do here. | |
254 | */ | |
255 | dev_err(dev, "unable to reinitialize the chip\n"); | |
256 | return -ENODEV; | |
257 | } | |
258 | ||
259 | static struct ina2xx_data *ina2xx_update_device(struct device *dev) | |
260 | { | |
261 | struct ina2xx_data *data = dev_get_drvdata(dev); | |
262 | struct ina2xx_data *ret = data; | |
72a87a47 | 263 | unsigned long after; |
509416a8 BG |
264 | int rv; |
265 | ||
266 | mutex_lock(&data->update_lock); | |
267 | ||
72a87a47 BG |
268 | after = data->last_updated + data->update_interval; |
269 | if (time_after(jiffies, after) || !data->valid) { | |
509416a8 BG |
270 | rv = ina2xx_do_update(dev); |
271 | if (rv < 0) | |
272 | ret = ERR_PTR(rv); | |
273 | } | |
274 | ||
f7c2fe38 FL |
275 | mutex_unlock(&data->update_lock); |
276 | return ret; | |
277 | } | |
278 | ||
6106db25 | 279 | static int ina2xx_get_value(struct ina2xx_data *data, u8 reg) |
f7c2fe38 | 280 | { |
6106db25 | 281 | int val; |
f7c2fe38 FL |
282 | |
283 | switch (reg) { | |
284 | case INA2XX_SHUNT_VOLTAGE: | |
c0214f98 FB |
285 | /* signed register */ |
286 | val = DIV_ROUND_CLOSEST((s16)data->regs[reg], | |
6106db25 | 287 | data->config->shunt_div); |
f7c2fe38 FL |
288 | break; |
289 | case INA2XX_BUS_VOLTAGE: | |
6106db25 GR |
290 | val = (data->regs[reg] >> data->config->bus_voltage_shift) |
291 | * data->config->bus_voltage_lsb; | |
292 | val = DIV_ROUND_CLOSEST(val, 1000); | |
f7c2fe38 FL |
293 | break; |
294 | case INA2XX_POWER: | |
6106db25 | 295 | val = data->regs[reg] * data->config->power_lsb; |
f7c2fe38 FL |
296 | break; |
297 | case INA2XX_CURRENT: | |
c0214f98 FB |
298 | /* signed register, LSB=1mA (selected), in mA */ |
299 | val = (s16)data->regs[reg]; | |
f7c2fe38 | 300 | break; |
8a5fc795 | 301 | case INA2XX_CALIBRATION: |
b721fe2a BG |
302 | val = DIV_ROUND_CLOSEST(data->config->calibration_factor, |
303 | data->regs[reg]); | |
8a5fc795 | 304 | break; |
f7c2fe38 FL |
305 | default: |
306 | /* programmer goofed */ | |
307 | WARN_ON_ONCE(1); | |
308 | val = 0; | |
309 | break; | |
310 | } | |
311 | ||
312 | return val; | |
313 | } | |
314 | ||
315 | static ssize_t ina2xx_show_value(struct device *dev, | |
316 | struct device_attribute *da, char *buf) | |
317 | { | |
318 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
319 | struct ina2xx_data *data = ina2xx_update_device(dev); | |
f7c2fe38 FL |
320 | |
321 | if (IS_ERR(data)) | |
322 | return PTR_ERR(data); | |
323 | ||
6106db25 GR |
324 | return snprintf(buf, PAGE_SIZE, "%d\n", |
325 | ina2xx_get_value(data, attr->index)); | |
f7c2fe38 FL |
326 | } |
327 | ||
8a5fc795 BG |
328 | static ssize_t ina2xx_set_shunt(struct device *dev, |
329 | struct device_attribute *da, | |
330 | const char *buf, size_t count) | |
331 | { | |
332 | struct ina2xx_data *data = ina2xx_update_device(dev); | |
333 | unsigned long val; | |
334 | int status; | |
335 | ||
336 | if (IS_ERR(data)) | |
337 | return PTR_ERR(data); | |
338 | ||
339 | status = kstrtoul(buf, 10, &val); | |
340 | if (status < 0) | |
341 | return status; | |
342 | ||
343 | if (val == 0 || | |
344 | /* Values greater than the calibration factor make no sense. */ | |
345 | val > data->config->calibration_factor) | |
346 | return -EINVAL; | |
347 | ||
348 | mutex_lock(&data->update_lock); | |
349 | data->rshunt = val; | |
350 | status = ina2xx_calibrate(data); | |
351 | mutex_unlock(&data->update_lock); | |
352 | if (status < 0) | |
353 | return status; | |
354 | ||
355 | return count; | |
356 | } | |
357 | ||
72a87a47 BG |
358 | static ssize_t ina226_set_interval(struct device *dev, |
359 | struct device_attribute *da, | |
360 | const char *buf, size_t count) | |
361 | { | |
362 | struct ina2xx_data *data = dev_get_drvdata(dev); | |
363 | unsigned long val; | |
364 | int status; | |
365 | ||
72a87a47 BG |
366 | status = kstrtoul(buf, 10, &val); |
367 | if (status < 0) | |
368 | return status; | |
369 | ||
370 | if (val > INT_MAX || val == 0) | |
371 | return -EINVAL; | |
372 | ||
373 | mutex_lock(&data->update_lock); | |
374 | data->curr_config = ina226_interval_to_reg(val, | |
375 | data->regs[INA2XX_CONFIG]); | |
376 | status = i2c_smbus_write_word_swapped(data->client, | |
377 | INA2XX_CONFIG, | |
378 | data->curr_config); | |
379 | ||
380 | ina226_set_update_interval(data); | |
381 | /* Make sure the next access re-reads all registers. */ | |
382 | data->valid = 0; | |
383 | mutex_unlock(&data->update_lock); | |
384 | if (status < 0) | |
385 | return status; | |
386 | ||
387 | return count; | |
388 | } | |
389 | ||
390 | static ssize_t ina226_show_interval(struct device *dev, | |
391 | struct device_attribute *da, char *buf) | |
392 | { | |
393 | struct ina2xx_data *data = ina2xx_update_device(dev); | |
394 | ||
395 | if (IS_ERR(data)) | |
396 | return PTR_ERR(data); | |
397 | ||
398 | /* | |
399 | * We don't use data->update_interval here as we want to display | |
400 | * the actual interval used by the chip and jiffies_to_msecs() | |
401 | * doesn't seem to be accurate enough. | |
402 | */ | |
403 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
404 | ina226_reg_to_interval(data->regs[INA2XX_CONFIG])); | |
405 | } | |
406 | ||
f7c2fe38 | 407 | /* shunt voltage */ |
f0df0fd9 GR |
408 | static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, ina2xx_show_value, NULL, |
409 | INA2XX_SHUNT_VOLTAGE); | |
f7c2fe38 FL |
410 | |
411 | /* bus voltage */ | |
f0df0fd9 GR |
412 | static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ina2xx_show_value, NULL, |
413 | INA2XX_BUS_VOLTAGE); | |
f7c2fe38 FL |
414 | |
415 | /* calculated current */ | |
f0df0fd9 GR |
416 | static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ina2xx_show_value, NULL, |
417 | INA2XX_CURRENT); | |
f7c2fe38 FL |
418 | |
419 | /* calculated power */ | |
f0df0fd9 GR |
420 | static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, ina2xx_show_value, NULL, |
421 | INA2XX_POWER); | |
f7c2fe38 | 422 | |
8a5fc795 BG |
423 | /* shunt resistance */ |
424 | static SENSOR_DEVICE_ATTR(shunt_resistor, S_IRUGO | S_IWUSR, | |
425 | ina2xx_show_value, ina2xx_set_shunt, | |
426 | INA2XX_CALIBRATION); | |
427 | ||
72a87a47 BG |
428 | /* update interval (ina226 only) */ |
429 | static SENSOR_DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, | |
430 | ina226_show_interval, ina226_set_interval, 0); | |
431 | ||
f7c2fe38 | 432 | /* pointers to created device attributes */ |
468bf0e3 | 433 | static struct attribute *ina2xx_attrs[] = { |
f7c2fe38 FL |
434 | &sensor_dev_attr_in0_input.dev_attr.attr, |
435 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
436 | &sensor_dev_attr_curr1_input.dev_attr.attr, | |
437 | &sensor_dev_attr_power1_input.dev_attr.attr, | |
8a5fc795 | 438 | &sensor_dev_attr_shunt_resistor.dev_attr.attr, |
f7c2fe38 FL |
439 | NULL, |
440 | }; | |
72a87a47 BG |
441 | |
442 | static const struct attribute_group ina2xx_group = { | |
443 | .attrs = ina2xx_attrs, | |
444 | }; | |
445 | ||
446 | static struct attribute *ina226_attrs[] = { | |
447 | &sensor_dev_attr_update_interval.dev_attr.attr, | |
448 | NULL, | |
449 | }; | |
450 | ||
451 | static const struct attribute_group ina226_group = { | |
452 | .attrs = ina226_attrs, | |
453 | }; | |
f7c2fe38 FL |
454 | |
455 | static int ina2xx_probe(struct i2c_client *client, | |
456 | const struct i2c_device_id *id) | |
457 | { | |
458 | struct i2c_adapter *adapter = client->adapter; | |
f7c2fe38 | 459 | struct ina2xx_platform_data *pdata; |
468bf0e3 GR |
460 | struct device *dev = &client->dev; |
461 | struct ina2xx_data *data; | |
462 | struct device *hwmon_dev; | |
468bf0e3 | 463 | u32 val; |
72a87a47 | 464 | int ret, group = 0; |
f7c2fe38 FL |
465 | |
466 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) | |
467 | return -ENODEV; | |
468 | ||
468bf0e3 | 469 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
f7c2fe38 FL |
470 | if (!data) |
471 | return -ENOMEM; | |
472 | ||
468bf0e3 GR |
473 | if (dev_get_platdata(dev)) { |
474 | pdata = dev_get_platdata(dev); | |
509416a8 | 475 | data->rshunt = pdata->shunt_uohms; |
468bf0e3 GR |
476 | } else if (!of_property_read_u32(dev->of_node, |
477 | "shunt-resistor", &val)) { | |
509416a8 BG |
478 | data->rshunt = val; |
479 | } else { | |
480 | data->rshunt = INA2XX_RSHUNT_DEFAULT; | |
f7c2fe38 FL |
481 | } |
482 | ||
f7c2fe38 FL |
483 | /* set the device type */ |
484 | data->kind = id->driver_data; | |
6106db25 | 485 | data->config = &ina2xx_config[data->kind]; |
72a87a47 | 486 | data->curr_config = data->config->config_default; |
509416a8 | 487 | data->client = client; |
f7c2fe38 | 488 | |
72a87a47 BG |
489 | /* |
490 | * Ina226 has a variable update_interval. For ina219 we | |
491 | * use a constant value. | |
492 | */ | |
493 | if (data->kind == ina226) | |
494 | ina226_set_update_interval(data); | |
495 | else | |
496 | data->update_interval = HZ / INA2XX_CONVERSION_RATE; | |
497 | ||
e7947040 BG |
498 | if (data->rshunt <= 0 || |
499 | data->rshunt > data->config->calibration_factor) | |
f975b339 | 500 | return -ENODEV; |
f975b339 | 501 | |
509416a8 | 502 | ret = ina2xx_init(data); |
f975b339 | 503 | if (ret < 0) { |
509416a8 | 504 | dev_err(dev, "error configuring the device: %d\n", ret); |
f975b339 BG |
505 | return -ENODEV; |
506 | } | |
f7c2fe38 | 507 | |
f7c2fe38 FL |
508 | mutex_init(&data->update_lock); |
509 | ||
72a87a47 BG |
510 | data->groups[group++] = &ina2xx_group; |
511 | if (data->kind == ina226) | |
512 | data->groups[group++] = &ina226_group; | |
513 | ||
468bf0e3 | 514 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
72a87a47 | 515 | data, data->groups); |
468bf0e3 GR |
516 | if (IS_ERR(hwmon_dev)) |
517 | return PTR_ERR(hwmon_dev); | |
f7c2fe38 | 518 | |
468bf0e3 | 519 | dev_info(dev, "power monitor %s (Rshunt = %li uOhm)\n", |
509416a8 | 520 | id->name, data->rshunt); |
6106db25 | 521 | |
f7c2fe38 | 522 | return 0; |
f7c2fe38 FL |
523 | } |
524 | ||
525 | static const struct i2c_device_id ina2xx_id[] = { | |
526 | { "ina219", ina219 }, | |
dc92cd0c | 527 | { "ina220", ina219 }, |
f7c2fe38 | 528 | { "ina226", ina226 }, |
dc92cd0c | 529 | { "ina230", ina226 }, |
add513be | 530 | { "ina231", ina226 }, |
f7c2fe38 FL |
531 | { } |
532 | }; | |
533 | MODULE_DEVICE_TABLE(i2c, ina2xx_id); | |
534 | ||
535 | static struct i2c_driver ina2xx_driver = { | |
536 | .driver = { | |
537 | .name = "ina2xx", | |
538 | }, | |
539 | .probe = ina2xx_probe, | |
f7c2fe38 FL |
540 | .id_table = ina2xx_id, |
541 | }; | |
542 | ||
d835ca0f | 543 | module_i2c_driver(ina2xx_driver); |
f7c2fe38 FL |
544 | |
545 | MODULE_AUTHOR("Lothar Felten <l-felten@ti.com>"); | |
546 | MODULE_DESCRIPTION("ina2xx driver"); | |
547 | MODULE_LICENSE("GPL"); |