2 * Hardware monitoring driver for LM25056 / LM25063 / LM25066 / LM5064 / LM5066
4 * Copyright (c) 2011 Ericsson AB.
5 * Copyright (c) 2013 Guenter Roeck
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.
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.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <linux/bitops.h>
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/i2c.h>
31 enum chips { lm25056, lm25063, lm25066, lm5064, lm5066, lm5066i };
33 #define LM25066_READ_VAUX 0xd0
34 #define LM25066_MFR_READ_IIN 0xd1
35 #define LM25066_MFR_READ_PIN 0xd2
36 #define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3
37 #define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4
38 #define LM25066_READ_PIN_PEAK 0xd5
39 #define LM25066_CLEAR_PIN_PEAK 0xd6
40 #define LM25066_DEVICE_SETUP 0xd9
41 #define LM25066_READ_AVG_VIN 0xdc
42 #define LM25066_READ_AVG_VOUT 0xdd
43 #define LM25066_READ_AVG_IIN 0xde
44 #define LM25066_READ_AVG_PIN 0xdf
46 #define LM25066_DEV_SETUP_CL BIT(4) /* Current limit */
50 #define LM25056_VAUX_OV_WARN_LIMIT 0xe3
51 #define LM25056_VAUX_UV_WARN_LIMIT 0xe4
53 #define LM25056_MFR_STS_VAUX_OV_WARN BIT(1)
54 #define LM25056_MFR_STS_VAUX_UV_WARN BIT(0)
58 #define LM25063_READ_VOUT_MAX 0xe5
59 #define LM25063_READ_VOUT_MIN 0xe6
65 #define PSC_CURRENT_IN_L (PSC_NUM_CLASSES)
66 #define PSC_POWER_L (PSC_NUM_CLASSES + 1)
68 static struct __coeff lm25066_coeff[6][PSC_NUM_CLASSES + 2] = {
78 [PSC_CURRENT_IN_L] = {
101 [PSC_VOLTAGE_OUT] = {
109 [PSC_CURRENT_IN_L] = {
121 [PSC_TEMPERATURE] = {
130 [PSC_VOLTAGE_OUT] = {
138 [PSC_CURRENT_IN_L] = {
150 [PSC_TEMPERATURE] = {
160 [PSC_VOLTAGE_OUT] = {
168 [PSC_CURRENT_IN_L] = {
180 [PSC_TEMPERATURE] = {
189 [PSC_VOLTAGE_OUT] = {
197 [PSC_CURRENT_IN_L] = {
209 [PSC_TEMPERATURE] = {
219 [PSC_VOLTAGE_OUT] = {
229 [PSC_CURRENT_IN_L] = {
244 [PSC_TEMPERATURE] = {
250 struct lm25066_data {
252 u16 rlimit; /* Maximum register value */
253 struct pmbus_driver_info info;
256 #define to_lm25066_data(x) container_of(x, struct lm25066_data, info)
258 static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
260 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
261 const struct lm25066_data *data = to_lm25066_data(info);
265 case PMBUS_VIRT_READ_VMON:
266 ret = pmbus_read_word_data(client, 0, LM25066_READ_VAUX);
269 /* Adjust returned value to match VIN coefficients */
272 /* VIN: 6.14 mV VAUX: 293 uV LSB */
273 ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
276 /* VIN: 6.25 mV VAUX: 200.0 uV LSB */
277 ret = DIV_ROUND_CLOSEST(ret * 20, 625);
280 /* VIN: 4.54 mV VAUX: 283.2 uV LSB */
281 ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
284 /* VIN: 4.53 mV VAUX: 700 uV LSB */
285 ret = DIV_ROUND_CLOSEST(ret * 70, 453);
289 /* VIN: 2.18 mV VAUX: 725 uV LSB */
290 ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
295 ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN);
298 ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN);
300 case PMBUS_IIN_OC_WARN_LIMIT:
301 ret = pmbus_read_word_data(client, 0,
302 LM25066_MFR_IIN_OC_WARN_LIMIT);
304 case PMBUS_PIN_OP_WARN_LIMIT:
305 ret = pmbus_read_word_data(client, 0,
306 LM25066_MFR_PIN_OP_WARN_LIMIT);
308 case PMBUS_VIRT_READ_VIN_AVG:
309 ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN);
311 case PMBUS_VIRT_READ_VOUT_AVG:
312 ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT);
314 case PMBUS_VIRT_READ_IIN_AVG:
315 ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN);
317 case PMBUS_VIRT_READ_PIN_AVG:
318 ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN);
320 case PMBUS_VIRT_READ_PIN_MAX:
321 ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK);
323 case PMBUS_VIRT_RESET_PIN_HISTORY:
333 static int lm25063_read_word_data(struct i2c_client *client, int page, int reg)
338 case PMBUS_VIRT_READ_VOUT_MAX:
339 ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MAX);
341 case PMBUS_VIRT_READ_VOUT_MIN:
342 ret = pmbus_read_word_data(client, 0, LM25063_READ_VOUT_MIN);
345 ret = lm25066_read_word_data(client, page, reg);
351 static int lm25056_read_word_data(struct i2c_client *client, int page, int reg)
356 case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
357 ret = pmbus_read_word_data(client, 0,
358 LM25056_VAUX_UV_WARN_LIMIT);
361 /* Adjust returned value to match VIN coefficients */
362 ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
364 case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
365 ret = pmbus_read_word_data(client, 0,
366 LM25056_VAUX_OV_WARN_LIMIT);
369 /* Adjust returned value to match VIN coefficients */
370 ret = DIV_ROUND_CLOSEST(ret * 293, 6140);
373 ret = lm25066_read_word_data(client, page, reg);
379 static int lm25056_read_byte_data(struct i2c_client *client, int page, int reg)
384 case PMBUS_VIRT_STATUS_VMON:
385 ret = pmbus_read_byte_data(client, 0,
386 PMBUS_STATUS_MFR_SPECIFIC);
390 if (ret & LM25056_MFR_STS_VAUX_UV_WARN)
391 s |= PB_VOLTAGE_UV_WARNING;
392 if (ret & LM25056_MFR_STS_VAUX_OV_WARN)
393 s |= PB_VOLTAGE_OV_WARNING;
403 static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
406 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
407 const struct lm25066_data *data = to_lm25066_data(info);
411 case PMBUS_POUT_OP_FAULT_LIMIT:
412 case PMBUS_POUT_OP_WARN_LIMIT:
413 case PMBUS_VOUT_UV_WARN_LIMIT:
414 case PMBUS_OT_FAULT_LIMIT:
415 case PMBUS_OT_WARN_LIMIT:
416 case PMBUS_IIN_OC_FAULT_LIMIT:
417 case PMBUS_VIN_UV_WARN_LIMIT:
418 case PMBUS_VIN_UV_FAULT_LIMIT:
419 case PMBUS_VIN_OV_FAULT_LIMIT:
420 case PMBUS_VIN_OV_WARN_LIMIT:
421 word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
422 ret = pmbus_write_word_data(client, 0, reg, word);
423 pmbus_clear_cache(client);
425 case PMBUS_IIN_OC_WARN_LIMIT:
426 word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
427 ret = pmbus_write_word_data(client, 0,
428 LM25066_MFR_IIN_OC_WARN_LIMIT,
430 pmbus_clear_cache(client);
432 case PMBUS_PIN_OP_WARN_LIMIT:
433 word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
434 ret = pmbus_write_word_data(client, 0,
435 LM25066_MFR_PIN_OP_WARN_LIMIT,
437 pmbus_clear_cache(client);
439 case PMBUS_VIRT_VMON_UV_WARN_LIMIT:
440 /* Adjust from VIN coefficients (for LM25056) */
441 word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
442 word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
443 ret = pmbus_write_word_data(client, 0,
444 LM25056_VAUX_UV_WARN_LIMIT, word);
445 pmbus_clear_cache(client);
447 case PMBUS_VIRT_VMON_OV_WARN_LIMIT:
448 /* Adjust from VIN coefficients (for LM25056) */
449 word = DIV_ROUND_CLOSEST((int)word * 6140, 293);
450 word = ((s16)word < 0) ? 0 : clamp_val(word, 0, data->rlimit);
451 ret = pmbus_write_word_data(client, 0,
452 LM25056_VAUX_OV_WARN_LIMIT, word);
453 pmbus_clear_cache(client);
455 case PMBUS_VIRT_RESET_PIN_HISTORY:
456 ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
465 static int lm25066_probe(struct i2c_client *client,
466 const struct i2c_device_id *id)
469 struct lm25066_data *data;
470 struct pmbus_driver_info *info;
471 struct __coeff *coeff;
473 if (!i2c_check_functionality(client->adapter,
474 I2C_FUNC_SMBUS_READ_BYTE_DATA))
477 data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data),
482 config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
486 data->id = id->driver_data;
490 info->format[PSC_VOLTAGE_IN] = direct;
491 info->format[PSC_VOLTAGE_OUT] = direct;
492 info->format[PSC_CURRENT_IN] = direct;
493 info->format[PSC_TEMPERATURE] = direct;
494 info->format[PSC_POWER] = direct;
496 info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON
497 | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
498 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
500 if (data->id == lm25056) {
501 info->func[0] |= PMBUS_HAVE_STATUS_VMON;
502 info->read_word_data = lm25056_read_word_data;
503 info->read_byte_data = lm25056_read_byte_data;
504 data->rlimit = 0x0fff;
505 } else if (data->id == lm25063) {
506 info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
508 info->read_word_data = lm25063_read_word_data;
509 data->rlimit = 0xffff;
511 info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
512 info->read_word_data = lm25066_read_word_data;
513 data->rlimit = 0x0fff;
515 info->write_word_data = lm25066_write_word_data;
517 coeff = &lm25066_coeff[data->id][0];
518 info->m[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].m;
519 info->b[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].b;
520 info->R[PSC_TEMPERATURE] = coeff[PSC_TEMPERATURE].R;
521 info->m[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].m;
522 info->b[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].b;
523 info->R[PSC_VOLTAGE_IN] = coeff[PSC_VOLTAGE_IN].R;
524 info->m[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].m;
525 info->b[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].b;
526 info->R[PSC_VOLTAGE_OUT] = coeff[PSC_VOLTAGE_OUT].R;
527 info->R[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].R;
528 info->R[PSC_POWER] = coeff[PSC_POWER].R;
529 if (config & LM25066_DEV_SETUP_CL) {
530 info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].m;
531 info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN_L].b;
532 info->m[PSC_POWER] = coeff[PSC_POWER_L].m;
533 info->b[PSC_POWER] = coeff[PSC_POWER_L].b;
535 info->m[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].m;
536 info->b[PSC_CURRENT_IN] = coeff[PSC_CURRENT_IN].b;
537 info->m[PSC_POWER] = coeff[PSC_POWER].m;
538 info->b[PSC_POWER] = coeff[PSC_POWER].b;
541 return pmbus_do_probe(client, id, info);
544 static const struct i2c_device_id lm25066_id[] = {
545 {"lm25056", lm25056},
546 {"lm25063", lm25063},
547 {"lm25066", lm25066},
550 {"lm5066i", lm5066i},
554 MODULE_DEVICE_TABLE(i2c, lm25066_id);
556 /* This is the driver that will be inserted */
557 static struct i2c_driver lm25066_driver = {
561 .probe = lm25066_probe,
562 .remove = pmbus_do_remove,
563 .id_table = lm25066_id,
566 module_i2c_driver(lm25066_driver);
568 MODULE_AUTHOR("Guenter Roeck");
569 MODULE_DESCRIPTION("PMBus driver for LM25066 and compatible chips");
570 MODULE_LICENSE("GPL");