1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
4 * and Digital Power Monitor
6 * Copyright (c) 2011 Ericsson AB.
7 * Copyright (c) 2018 Guenter Roeck
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/slab.h>
15 #include <linux/i2c.h>
16 #include <linux/bitops.h>
17 #include <linux/bitfield.h>
18 #include <linux/log2.h>
21 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
23 #define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
24 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
25 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
27 #define ADM1275_PEAK_IOUT 0xd0
28 #define ADM1275_PEAK_VIN 0xd1
29 #define ADM1275_PEAK_VOUT 0xd2
30 #define ADM1275_PMON_CONFIG 0xd4
32 #define ADM1275_VIN_VOUT_SELECT BIT(6)
33 #define ADM1275_VRANGE BIT(5)
34 #define ADM1075_IRANGE_50 BIT(4)
35 #define ADM1075_IRANGE_25 BIT(3)
36 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
38 #define ADM1272_IRANGE BIT(0)
40 #define ADM1278_TEMP1_EN BIT(3)
41 #define ADM1278_VIN_EN BIT(2)
42 #define ADM1278_VOUT_EN BIT(1)
44 #define ADM1293_IRANGE_25 0
45 #define ADM1293_IRANGE_50 BIT(6)
46 #define ADM1293_IRANGE_100 BIT(7)
47 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
48 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
50 #define ADM1293_VIN_SEL_012 BIT(2)
51 #define ADM1293_VIN_SEL_074 BIT(3)
52 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
53 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
55 #define ADM1293_VAUX_EN BIT(1)
57 #define ADM1278_PEAK_TEMP 0xd7
58 #define ADM1275_IOUT_WARN2_LIMIT 0xd7
59 #define ADM1275_DEVICE_CONFIG 0xd8
61 #define ADM1275_IOUT_WARN2_SELECT BIT(4)
63 #define ADM1276_PEAK_PIN 0xda
64 #define ADM1075_READ_VAUX 0xdd
65 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde
66 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
67 #define ADM1293_IOUT_MIN 0xe3
68 #define ADM1293_PIN_MIN 0xe4
69 #define ADM1075_VAUX_STATUS 0xf6
71 #define ADM1075_VAUX_OV_WARN BIT(7)
72 #define ADM1075_VAUX_UV_WARN BIT(6)
74 #define ADM1275_VI_AVG_SHIFT 0
75 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
77 #define ADM1275_SAMPLES_AVG_MAX 128
79 #define ADM1278_PWR_AVG_SHIFT 11
80 #define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
81 ADM1278_PWR_AVG_SHIFT)
82 #define ADM1278_VI_AVG_SHIFT 8
83 #define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
91 bool have_vaux_status;
92 bool have_mfr_vaux_status;
97 bool have_power_sampling;
98 struct pmbus_driver_info info;
101 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
103 struct coefficients {
109 static const struct coefficients adm1075_coefficients[] = {
110 [0] = { 27169, 0, -1 }, /* voltage */
111 [1] = { 806, 20475, -1 }, /* current, irange25 */
112 [2] = { 404, 20475, -1 }, /* current, irange50 */
113 [3] = { 8549, 0, -1 }, /* power, irange25 */
114 [4] = { 4279, 0, -1 }, /* power, irange50 */
117 static const struct coefficients adm1272_coefficients[] = {
118 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
119 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
120 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
121 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
122 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
123 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
124 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
125 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
126 [8] = { 42, 31871, -1 }, /* temperature */
130 static const struct coefficients adm1275_coefficients[] = {
131 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
132 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
133 [2] = { 807, 20475, -1 }, /* current */
136 static const struct coefficients adm1276_coefficients[] = {
137 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
138 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
139 [2] = { 807, 20475, -1 }, /* current */
140 [3] = { 6043, 0, -2 }, /* power, vrange set */
141 [4] = { 2115, 0, -1 }, /* power, vrange not set */
144 static const struct coefficients adm1278_coefficients[] = {
145 [0] = { 19599, 0, -2 }, /* voltage */
146 [1] = { 800, 20475, -1 }, /* current */
147 [2] = { 6123, 0, -2 }, /* power */
148 [3] = { 42, 31880, -1 }, /* temperature */
151 static const struct coefficients adm1293_coefficients[] = {
152 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
153 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
154 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
155 [3] = { 8000, -100, -2 }, /* current, irange25 */
156 [4] = { 4000, -100, -2 }, /* current, irange50 */
157 [5] = { 20000, -1000, -3 }, /* current, irange100 */
158 [6] = { 10000, -1000, -3 }, /* current, irange200 */
159 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
160 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
161 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
162 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
163 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
164 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
165 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
166 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
167 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
168 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
169 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
170 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
173 static int adm1275_read_pmon_config(const struct adm1275_data *data,
174 struct i2c_client *client, bool is_power)
180 * The PMON configuration register is a 16-bit register only on chips
181 * supporting power average sampling. On other chips it is an 8-bit
184 if (data->have_power_sampling) {
185 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
186 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
187 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
189 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
190 mask = ADM1275_VI_AVG_MASK;
191 shift = ADM1275_VI_AVG_SHIFT;
196 return (ret & mask) >> shift;
199 static int adm1275_write_pmon_config(const struct adm1275_data *data,
200 struct i2c_client *client,
201 bool is_power, u16 word)
206 if (data->have_power_sampling) {
207 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
208 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
209 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
211 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
212 mask = ADM1275_VI_AVG_MASK;
213 shift = ADM1275_VI_AVG_SHIFT;
218 word = (ret & ~mask) | ((word << shift) & mask);
219 if (data->have_power_sampling)
220 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
223 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
229 static int adm1275_read_word_data(struct i2c_client *client, int page,
232 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
233 const struct adm1275_data *data = to_adm1275_data(info);
240 case PMBUS_IOUT_UC_FAULT_LIMIT:
241 if (!data->have_uc_fault)
243 ret = pmbus_read_word_data(client, 0, 0xff,
244 ADM1275_IOUT_WARN2_LIMIT);
246 case PMBUS_IOUT_OC_FAULT_LIMIT:
247 if (!data->have_oc_fault)
249 ret = pmbus_read_word_data(client, 0, 0xff,
250 ADM1275_IOUT_WARN2_LIMIT);
252 case PMBUS_VOUT_OV_WARN_LIMIT:
255 ret = pmbus_read_word_data(client, 0, 0xff,
256 ADM1075_VAUX_OV_WARN_LIMIT);
258 case PMBUS_VOUT_UV_WARN_LIMIT:
261 ret = pmbus_read_word_data(client, 0, 0xff,
262 ADM1075_VAUX_UV_WARN_LIMIT);
264 case PMBUS_READ_VOUT:
267 ret = pmbus_read_word_data(client, 0, 0xff,
270 case PMBUS_VIRT_READ_IOUT_MIN:
271 if (!data->have_iout_min)
273 ret = pmbus_read_word_data(client, 0, 0xff,
276 case PMBUS_VIRT_READ_IOUT_MAX:
277 ret = pmbus_read_word_data(client, 0, 0xff,
280 case PMBUS_VIRT_READ_VOUT_MAX:
281 ret = pmbus_read_word_data(client, 0, 0xff,
284 case PMBUS_VIRT_READ_VIN_MAX:
285 ret = pmbus_read_word_data(client, 0, 0xff,
288 case PMBUS_VIRT_READ_PIN_MIN:
289 if (!data->have_pin_min)
291 ret = pmbus_read_word_data(client, 0, 0xff,
294 case PMBUS_VIRT_READ_PIN_MAX:
295 if (!data->have_pin_max)
297 ret = pmbus_read_word_data(client, 0, 0xff,
300 case PMBUS_VIRT_READ_TEMP_MAX:
301 if (!data->have_temp_max)
303 ret = pmbus_read_word_data(client, 0, 0xff,
306 case PMBUS_VIRT_RESET_IOUT_HISTORY:
307 case PMBUS_VIRT_RESET_VOUT_HISTORY:
308 case PMBUS_VIRT_RESET_VIN_HISTORY:
310 case PMBUS_VIRT_RESET_PIN_HISTORY:
311 if (!data->have_pin_max)
314 case PMBUS_VIRT_RESET_TEMP_HISTORY:
315 if (!data->have_temp_max)
318 case PMBUS_VIRT_POWER_SAMPLES:
319 if (!data->have_power_sampling)
321 ret = adm1275_read_pmon_config(data, client, true);
326 case PMBUS_VIRT_IN_SAMPLES:
327 case PMBUS_VIRT_CURR_SAMPLES:
328 ret = adm1275_read_pmon_config(data, client, false);
340 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
343 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
344 const struct adm1275_data *data = to_adm1275_data(info);
351 case PMBUS_IOUT_UC_FAULT_LIMIT:
352 case PMBUS_IOUT_OC_FAULT_LIMIT:
353 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
356 case PMBUS_VIRT_RESET_IOUT_HISTORY:
357 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
358 if (!ret && data->have_iout_min)
359 ret = pmbus_write_word_data(client, 0,
360 ADM1293_IOUT_MIN, 0);
362 case PMBUS_VIRT_RESET_VOUT_HISTORY:
363 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
365 case PMBUS_VIRT_RESET_VIN_HISTORY:
366 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
368 case PMBUS_VIRT_RESET_PIN_HISTORY:
369 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
370 if (!ret && data->have_pin_min)
371 ret = pmbus_write_word_data(client, 0,
374 case PMBUS_VIRT_RESET_TEMP_HISTORY:
375 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
377 case PMBUS_VIRT_POWER_SAMPLES:
378 if (!data->have_power_sampling)
380 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
381 ret = adm1275_write_pmon_config(data, client, true,
384 case PMBUS_VIRT_IN_SAMPLES:
385 case PMBUS_VIRT_CURR_SAMPLES:
386 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
387 ret = adm1275_write_pmon_config(data, client, false,
397 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
399 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
400 const struct adm1275_data *data = to_adm1275_data(info);
407 case PMBUS_STATUS_IOUT:
408 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
411 if (!data->have_oc_fault && !data->have_uc_fault)
413 mfr_status = pmbus_read_byte_data(client, page,
414 PMBUS_STATUS_MFR_SPECIFIC);
417 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
418 ret |= data->have_oc_fault ?
419 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
422 case PMBUS_STATUS_VOUT:
426 if (data->have_vaux_status) {
427 mfr_status = pmbus_read_byte_data(client, 0,
428 ADM1075_VAUX_STATUS);
431 if (mfr_status & ADM1075_VAUX_OV_WARN)
432 ret |= PB_VOLTAGE_OV_WARNING;
433 if (mfr_status & ADM1075_VAUX_UV_WARN)
434 ret |= PB_VOLTAGE_UV_WARNING;
435 } else if (data->have_mfr_vaux_status) {
436 mfr_status = pmbus_read_byte_data(client, page,
437 PMBUS_STATUS_MFR_SPECIFIC);
440 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
441 ret |= PB_VOLTAGE_OV_WARNING;
442 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
443 ret |= PB_VOLTAGE_UV_WARNING;
453 static const struct i2c_device_id adm1275_id[] = {
454 { "adm1075", adm1075 },
455 { "adm1272", adm1272 },
456 { "adm1275", adm1275 },
457 { "adm1276", adm1276 },
458 { "adm1278", adm1278 },
459 { "adm1293", adm1293 },
460 { "adm1294", adm1294 },
463 MODULE_DEVICE_TABLE(i2c, adm1275_id);
465 static int adm1275_probe(struct i2c_client *client)
467 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
468 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
469 int config, device_config;
471 struct pmbus_driver_info *info;
472 struct adm1275_data *data;
473 const struct i2c_device_id *mid;
474 const struct coefficients *coefficients;
475 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
480 if (!i2c_check_functionality(client->adapter,
481 I2C_FUNC_SMBUS_READ_BYTE_DATA
482 | I2C_FUNC_SMBUS_BLOCK_DATA))
485 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
487 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
490 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
491 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
495 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
497 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
500 for (mid = adm1275_id; mid->name[0]; mid++) {
501 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
505 dev_err(&client->dev, "Unsupported device\n");
509 if (strcmp(client->name, mid->name) != 0)
510 dev_notice(&client->dev,
511 "Device mismatch: Configured %s, detected %s\n",
512 client->name, mid->name);
514 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
515 mid->driver_data == adm1293 || mid->driver_data == adm1294)
516 config_read_fn = i2c_smbus_read_word_data;
518 config_read_fn = i2c_smbus_read_byte_data;
519 config = config_read_fn(client, ADM1275_PMON_CONFIG);
523 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
524 if (device_config < 0)
525 return device_config;
527 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
532 if (of_property_read_u32(client->dev.of_node,
533 "shunt-resistor-micro-ohms", &shunt))
534 shunt = 1000; /* 1 mOhm if not set via DT */
539 data->id = mid->driver_data;
544 info->format[PSC_VOLTAGE_IN] = direct;
545 info->format[PSC_VOLTAGE_OUT] = direct;
546 info->format[PSC_CURRENT_OUT] = direct;
547 info->format[PSC_POWER] = direct;
548 info->format[PSC_TEMPERATURE] = direct;
549 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
552 info->read_word_data = adm1275_read_word_data;
553 info->read_byte_data = adm1275_read_byte_data;
554 info->write_word_data = adm1275_write_word_data;
558 if (device_config & ADM1275_IOUT_WARN2_SELECT)
559 data->have_oc_fault = true;
561 data->have_uc_fault = true;
562 data->have_pin_max = true;
563 data->have_vaux_status = true;
565 coefficients = adm1075_coefficients;
567 switch (config & ADM1075_IRANGE_MASK) {
568 case ADM1075_IRANGE_25:
572 case ADM1075_IRANGE_50:
577 dev_err(&client->dev, "Invalid input current range");
581 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
582 | PMBUS_HAVE_STATUS_INPUT;
583 if (config & ADM1275_VIN_VOUT_SELECT)
585 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
588 data->have_vout = true;
589 data->have_pin_max = true;
590 data->have_temp_max = true;
591 data->have_power_sampling = true;
593 coefficients = adm1272_coefficients;
594 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
595 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
596 /* pindex depends on the combination of the above */
597 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
608 case ADM1275_VRANGE | ADM1272_IRANGE:
614 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
615 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
616 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
618 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
619 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=
620 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) {
621 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN;
622 ret = i2c_smbus_write_byte_data(client,
626 dev_err(&client->dev,
627 "Failed to enable VOUT monitoring\n");
631 if (config & ADM1278_VIN_EN)
632 info->func[0] |= PMBUS_HAVE_VIN;
635 if (device_config & ADM1275_IOUT_WARN2_SELECT)
636 data->have_oc_fault = true;
638 data->have_uc_fault = true;
639 data->have_vout = true;
641 coefficients = adm1275_coefficients;
642 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
645 if (config & ADM1275_VIN_VOUT_SELECT)
647 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
650 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
653 if (device_config & ADM1275_IOUT_WARN2_SELECT)
654 data->have_oc_fault = true;
656 data->have_uc_fault = true;
657 data->have_vout = true;
658 data->have_pin_max = true;
660 coefficients = adm1276_coefficients;
661 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
663 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
665 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
666 | PMBUS_HAVE_STATUS_INPUT;
667 if (config & ADM1275_VIN_VOUT_SELECT)
669 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
672 data->have_vout = true;
673 data->have_pin_max = true;
674 data->have_temp_max = true;
675 data->have_power_sampling = true;
677 coefficients = adm1278_coefficients;
683 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
684 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
685 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
687 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
688 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=
689 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) {
690 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN;
691 ret = i2c_smbus_write_word_data(client,
695 dev_err(&client->dev,
696 "Failed to enable VOUT monitoring\n");
701 if (config & ADM1278_VIN_EN)
702 info->func[0] |= PMBUS_HAVE_VIN;
706 data->have_iout_min = true;
707 data->have_pin_min = true;
708 data->have_pin_max = true;
709 data->have_mfr_vaux_status = true;
710 data->have_power_sampling = true;
712 coefficients = adm1293_coefficients;
715 switch (config & ADM1293_VIN_SEL_MASK) {
716 case ADM1293_VIN_SEL_012: /* 1.2V */
719 case ADM1293_VIN_SEL_074: /* 7.4V */
722 case ADM1293_VIN_SEL_210: /* 21V */
725 default: /* disabled */
729 switch (config & ADM1293_IRANGE_MASK) {
730 case ADM1293_IRANGE_25:
733 case ADM1293_IRANGE_50:
736 case ADM1293_IRANGE_100:
739 case ADM1293_IRANGE_200:
745 pindex = 7 + vindex * 4 + (cindex - 3);
747 if (config & ADM1293_VAUX_EN)
749 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
751 info->func[0] |= PMBUS_HAVE_PIN |
752 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
756 dev_err(&client->dev, "Unsupported device\n");
760 if (data->have_power_sampling &&
761 of_property_read_u32(client->dev.of_node,
762 "adi,power-sample-average", &avg) == 0) {
763 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
764 BIT(__fls(avg)) != avg) {
765 dev_err(&client->dev,
766 "Invalid number of power samples");
769 ret = adm1275_write_pmon_config(data, client, true,
772 dev_err(&client->dev,
773 "Setting power sample averaging failed with error %d",
779 if (of_property_read_u32(client->dev.of_node,
780 "adi,volt-curr-sample-average", &avg) == 0) {
781 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
782 BIT(__fls(avg)) != avg) {
783 dev_err(&client->dev,
784 "Invalid number of voltage/current samples");
787 ret = adm1275_write_pmon_config(data, client, false,
790 dev_err(&client->dev,
791 "Setting voltage and current sample averaging failed with error %d",
800 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
801 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
802 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
805 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
806 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
807 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
810 /* Scale current with sense resistor value */
811 info->m[PSC_CURRENT_OUT] =
812 coefficients[cindex].m * shunt / 1000;
813 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
814 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
818 coefficients[pindex].m * shunt / 1000;
819 info->b[PSC_POWER] = coefficients[pindex].b;
820 info->R[PSC_POWER] = coefficients[pindex].R;
823 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
824 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
825 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
828 return pmbus_do_probe(client, info);
831 static struct i2c_driver adm1275_driver = {
835 .probe_new = adm1275_probe,
836 .id_table = adm1275_id,
839 module_i2c_driver(adm1275_driver);
841 MODULE_AUTHOR("Guenter Roeck");
842 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
843 MODULE_LICENSE("GPL");
844 MODULE_IMPORT_NS(PMBUS);