treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / hwmon / pmbus / adm1275.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
4  * and Digital Power Monitor
5  *
6  * Copyright (c) 2011 Ericsson AB.
7  * Copyright (c) 2018 Guenter Roeck
8  */
9
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 "pmbus.h"
18
19 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
20
21 #define ADM1275_MFR_STATUS_IOUT_WARN2   BIT(0)
22 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
23 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
24
25 #define ADM1275_PEAK_IOUT               0xd0
26 #define ADM1275_PEAK_VIN                0xd1
27 #define ADM1275_PEAK_VOUT               0xd2
28 #define ADM1275_PMON_CONFIG             0xd4
29
30 #define ADM1275_VIN_VOUT_SELECT         BIT(6)
31 #define ADM1275_VRANGE                  BIT(5)
32 #define ADM1075_IRANGE_50               BIT(4)
33 #define ADM1075_IRANGE_25               BIT(3)
34 #define ADM1075_IRANGE_MASK             (BIT(3) | BIT(4))
35
36 #define ADM1272_IRANGE                  BIT(0)
37
38 #define ADM1278_TEMP1_EN                BIT(3)
39 #define ADM1278_VIN_EN                  BIT(2)
40 #define ADM1278_VOUT_EN                 BIT(1)
41
42 #define ADM1293_IRANGE_25               0
43 #define ADM1293_IRANGE_50               BIT(6)
44 #define ADM1293_IRANGE_100              BIT(7)
45 #define ADM1293_IRANGE_200              (BIT(6) | BIT(7))
46 #define ADM1293_IRANGE_MASK             (BIT(6) | BIT(7))
47
48 #define ADM1293_VIN_SEL_012             BIT(2)
49 #define ADM1293_VIN_SEL_074             BIT(3)
50 #define ADM1293_VIN_SEL_210             (BIT(2) | BIT(3))
51 #define ADM1293_VIN_SEL_MASK            (BIT(2) | BIT(3))
52
53 #define ADM1293_VAUX_EN                 BIT(1)
54
55 #define ADM1278_PEAK_TEMP               0xd7
56 #define ADM1275_IOUT_WARN2_LIMIT        0xd7
57 #define ADM1275_DEVICE_CONFIG           0xd8
58
59 #define ADM1275_IOUT_WARN2_SELECT       BIT(4)
60
61 #define ADM1276_PEAK_PIN                0xda
62 #define ADM1075_READ_VAUX               0xdd
63 #define ADM1075_VAUX_OV_WARN_LIMIT      0xde
64 #define ADM1075_VAUX_UV_WARN_LIMIT      0xdf
65 #define ADM1293_IOUT_MIN                0xe3
66 #define ADM1293_PIN_MIN                 0xe4
67 #define ADM1075_VAUX_STATUS             0xf6
68
69 #define ADM1075_VAUX_OV_WARN            BIT(7)
70 #define ADM1075_VAUX_UV_WARN            BIT(6)
71
72 struct adm1275_data {
73         int id;
74         bool have_oc_fault;
75         bool have_uc_fault;
76         bool have_vout;
77         bool have_vaux_status;
78         bool have_mfr_vaux_status;
79         bool have_iout_min;
80         bool have_pin_min;
81         bool have_pin_max;
82         bool have_temp_max;
83         struct pmbus_driver_info info;
84 };
85
86 #define to_adm1275_data(x)  container_of(x, struct adm1275_data, info)
87
88 struct coefficients {
89         s16 m;
90         s16 b;
91         s16 R;
92 };
93
94 static const struct coefficients adm1075_coefficients[] = {
95         [0] = { 27169, 0, -1 },         /* voltage */
96         [1] = { 806, 20475, -1 },       /* current, irange25 */
97         [2] = { 404, 20475, -1 },       /* current, irange50 */
98         [3] = { 8549, 0, -1 },          /* power, irange25 */
99         [4] = { 4279, 0, -1 },          /* power, irange50 */
100 };
101
102 static const struct coefficients adm1272_coefficients[] = {
103         [0] = { 6770, 0, -2 },          /* voltage, vrange 60V */
104         [1] = { 4062, 0, -2 },          /* voltage, vrange 100V */
105         [2] = { 1326, 20480, -1 },      /* current, vsense range 15mV */
106         [3] = { 663, 20480, -1 },       /* current, vsense range 30mV */
107         [4] = { 3512, 0, -2 },          /* power, vrange 60V, irange 15mV */
108         [5] = { 21071, 0, -3 },         /* power, vrange 100V, irange 15mV */
109         [6] = { 17561, 0, -3 },         /* power, vrange 60V, irange 30mV */
110         [7] = { 10535, 0, -3 },         /* power, vrange 100V, irange 30mV */
111         [8] = { 42, 31871, -1 },        /* temperature */
112
113 };
114
115 static const struct coefficients adm1275_coefficients[] = {
116         [0] = { 19199, 0, -2 },         /* voltage, vrange set */
117         [1] = { 6720, 0, -1 },          /* voltage, vrange not set */
118         [2] = { 807, 20475, -1 },       /* current */
119 };
120
121 static const struct coefficients adm1276_coefficients[] = {
122         [0] = { 19199, 0, -2 },         /* voltage, vrange set */
123         [1] = { 6720, 0, -1 },          /* voltage, vrange not set */
124         [2] = { 807, 20475, -1 },       /* current */
125         [3] = { 6043, 0, -2 },          /* power, vrange set */
126         [4] = { 2115, 0, -1 },          /* power, vrange not set */
127 };
128
129 static const struct coefficients adm1278_coefficients[] = {
130         [0] = { 19599, 0, -2 },         /* voltage */
131         [1] = { 800, 20475, -1 },       /* current */
132         [2] = { 6123, 0, -2 },          /* power */
133         [3] = { 42, 31880, -1 },        /* temperature */
134 };
135
136 static const struct coefficients adm1293_coefficients[] = {
137         [0] = { 3333, -1, 0 },          /* voltage, vrange 1.2V */
138         [1] = { 5552, -5, -1 },         /* voltage, vrange 7.4V */
139         [2] = { 19604, -50, -2 },       /* voltage, vrange 21V */
140         [3] = { 8000, -100, -2 },       /* current, irange25 */
141         [4] = { 4000, -100, -2 },       /* current, irange50 */
142         [5] = { 20000, -1000, -3 },     /* current, irange100 */
143         [6] = { 10000, -1000, -3 },     /* current, irange200 */
144         [7] = { 10417, 0, -1 },         /* power, 1.2V, irange25 */
145         [8] = { 5208, 0, -1 },          /* power, 1.2V, irange50 */
146         [9] = { 26042, 0, -2 },         /* power, 1.2V, irange100 */
147         [10] = { 13021, 0, -2 },        /* power, 1.2V, irange200 */
148         [11] = { 17351, 0, -2 },        /* power, 7.4V, irange25 */
149         [12] = { 8676, 0, -2 },         /* power, 7.4V, irange50 */
150         [13] = { 4338, 0, -2 },         /* power, 7.4V, irange100 */
151         [14] = { 21689, 0, -3 },        /* power, 7.4V, irange200 */
152         [15] = { 6126, 0, -2 },         /* power, 21V, irange25 */
153         [16] = { 30631, 0, -3 },        /* power, 21V, irange50 */
154         [17] = { 15316, 0, -3 },        /* power, 21V, irange100 */
155         [18] = { 7658, 0, -3 },         /* power, 21V, irange200 */
156 };
157
158 static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
159 {
160         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
161         const struct adm1275_data *data = to_adm1275_data(info);
162         int ret = 0;
163
164         if (page > 0)
165                 return -ENXIO;
166
167         switch (reg) {
168         case PMBUS_IOUT_UC_FAULT_LIMIT:
169                 if (!data->have_uc_fault)
170                         return -ENXIO;
171                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
172                 break;
173         case PMBUS_IOUT_OC_FAULT_LIMIT:
174                 if (!data->have_oc_fault)
175                         return -ENXIO;
176                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
177                 break;
178         case PMBUS_VOUT_OV_WARN_LIMIT:
179                 if (data->have_vout)
180                         return -ENODATA;
181                 ret = pmbus_read_word_data(client, 0,
182                                            ADM1075_VAUX_OV_WARN_LIMIT);
183                 break;
184         case PMBUS_VOUT_UV_WARN_LIMIT:
185                 if (data->have_vout)
186                         return -ENODATA;
187                 ret = pmbus_read_word_data(client, 0,
188                                            ADM1075_VAUX_UV_WARN_LIMIT);
189                 break;
190         case PMBUS_READ_VOUT:
191                 if (data->have_vout)
192                         return -ENODATA;
193                 ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
194                 break;
195         case PMBUS_VIRT_READ_IOUT_MIN:
196                 if (!data->have_iout_min)
197                         return -ENXIO;
198                 ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
199                 break;
200         case PMBUS_VIRT_READ_IOUT_MAX:
201                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
202                 break;
203         case PMBUS_VIRT_READ_VOUT_MAX:
204                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
205                 break;
206         case PMBUS_VIRT_READ_VIN_MAX:
207                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
208                 break;
209         case PMBUS_VIRT_READ_PIN_MIN:
210                 if (!data->have_pin_min)
211                         return -ENXIO;
212                 ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
213                 break;
214         case PMBUS_VIRT_READ_PIN_MAX:
215                 if (!data->have_pin_max)
216                         return -ENXIO;
217                 ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
218                 break;
219         case PMBUS_VIRT_READ_TEMP_MAX:
220                 if (!data->have_temp_max)
221                         return -ENXIO;
222                 ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
223                 break;
224         case PMBUS_VIRT_RESET_IOUT_HISTORY:
225         case PMBUS_VIRT_RESET_VOUT_HISTORY:
226         case PMBUS_VIRT_RESET_VIN_HISTORY:
227                 break;
228         case PMBUS_VIRT_RESET_PIN_HISTORY:
229                 if (!data->have_pin_max)
230                         return -ENXIO;
231                 break;
232         case PMBUS_VIRT_RESET_TEMP_HISTORY:
233                 if (!data->have_temp_max)
234                         return -ENXIO;
235                 break;
236         default:
237                 ret = -ENODATA;
238                 break;
239         }
240         return ret;
241 }
242
243 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
244                                    u16 word)
245 {
246         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
247         const struct adm1275_data *data = to_adm1275_data(info);
248         int ret;
249
250         if (page > 0)
251                 return -ENXIO;
252
253         switch (reg) {
254         case PMBUS_IOUT_UC_FAULT_LIMIT:
255         case PMBUS_IOUT_OC_FAULT_LIMIT:
256                 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
257                                             word);
258                 break;
259         case PMBUS_VIRT_RESET_IOUT_HISTORY:
260                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
261                 if (!ret && data->have_iout_min)
262                         ret = pmbus_write_word_data(client, 0,
263                                                     ADM1293_IOUT_MIN, 0);
264                 break;
265         case PMBUS_VIRT_RESET_VOUT_HISTORY:
266                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
267                 break;
268         case PMBUS_VIRT_RESET_VIN_HISTORY:
269                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
270                 break;
271         case PMBUS_VIRT_RESET_PIN_HISTORY:
272                 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
273                 if (!ret && data->have_pin_min)
274                         ret = pmbus_write_word_data(client, 0,
275                                                     ADM1293_PIN_MIN, 0);
276                 break;
277         case PMBUS_VIRT_RESET_TEMP_HISTORY:
278                 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
279                 break;
280         default:
281                 ret = -ENODATA;
282                 break;
283         }
284         return ret;
285 }
286
287 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
288 {
289         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
290         const struct adm1275_data *data = to_adm1275_data(info);
291         int mfr_status, ret;
292
293         if (page > 0)
294                 return -ENXIO;
295
296         switch (reg) {
297         case PMBUS_STATUS_IOUT:
298                 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
299                 if (ret < 0)
300                         break;
301                 if (!data->have_oc_fault && !data->have_uc_fault)
302                         break;
303                 mfr_status = pmbus_read_byte_data(client, page,
304                                                   PMBUS_STATUS_MFR_SPECIFIC);
305                 if (mfr_status < 0)
306                         return mfr_status;
307                 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
308                         ret |= data->have_oc_fault ?
309                           PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
310                 }
311                 break;
312         case PMBUS_STATUS_VOUT:
313                 if (data->have_vout)
314                         return -ENODATA;
315                 ret = 0;
316                 if (data->have_vaux_status) {
317                         mfr_status = pmbus_read_byte_data(client, 0,
318                                                           ADM1075_VAUX_STATUS);
319                         if (mfr_status < 0)
320                                 return mfr_status;
321                         if (mfr_status & ADM1075_VAUX_OV_WARN)
322                                 ret |= PB_VOLTAGE_OV_WARNING;
323                         if (mfr_status & ADM1075_VAUX_UV_WARN)
324                                 ret |= PB_VOLTAGE_UV_WARNING;
325                 } else if (data->have_mfr_vaux_status) {
326                         mfr_status = pmbus_read_byte_data(client, page,
327                                                 PMBUS_STATUS_MFR_SPECIFIC);
328                         if (mfr_status < 0)
329                                 return mfr_status;
330                         if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
331                                 ret |= PB_VOLTAGE_OV_WARNING;
332                         if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
333                                 ret |= PB_VOLTAGE_UV_WARNING;
334                 }
335                 break;
336         default:
337                 ret = -ENODATA;
338                 break;
339         }
340         return ret;
341 }
342
343 static const struct i2c_device_id adm1275_id[] = {
344         { "adm1075", adm1075 },
345         { "adm1272", adm1272 },
346         { "adm1275", adm1275 },
347         { "adm1276", adm1276 },
348         { "adm1278", adm1278 },
349         { "adm1293", adm1293 },
350         { "adm1294", adm1294 },
351         { }
352 };
353 MODULE_DEVICE_TABLE(i2c, adm1275_id);
354
355 static int adm1275_probe(struct i2c_client *client,
356                          const struct i2c_device_id *id)
357 {
358         u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
359         int config, device_config;
360         int ret;
361         struct pmbus_driver_info *info;
362         struct adm1275_data *data;
363         const struct i2c_device_id *mid;
364         const struct coefficients *coefficients;
365         int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
366         int tindex = -1;
367         u32 shunt;
368
369         if (!i2c_check_functionality(client->adapter,
370                                      I2C_FUNC_SMBUS_READ_BYTE_DATA
371                                      | I2C_FUNC_SMBUS_BLOCK_DATA))
372                 return -ENODEV;
373
374         ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
375         if (ret < 0) {
376                 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
377                 return ret;
378         }
379         if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
380                 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
381                 return -ENODEV;
382         }
383
384         ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
385         if (ret < 0) {
386                 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
387                 return ret;
388         }
389         for (mid = adm1275_id; mid->name[0]; mid++) {
390                 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
391                         break;
392         }
393         if (!mid->name[0]) {
394                 dev_err(&client->dev, "Unsupported device\n");
395                 return -ENODEV;
396         }
397
398         if (id->driver_data != mid->driver_data)
399                 dev_notice(&client->dev,
400                            "Device mismatch: Configured %s, detected %s\n",
401                            id->name, mid->name);
402
403         config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
404         if (config < 0)
405                 return config;
406
407         device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
408         if (device_config < 0)
409                 return device_config;
410
411         data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
412                             GFP_KERNEL);
413         if (!data)
414                 return -ENOMEM;
415
416         if (of_property_read_u32(client->dev.of_node,
417                                  "shunt-resistor-micro-ohms", &shunt))
418                 shunt = 1000; /* 1 mOhm if not set via DT */
419
420         if (shunt == 0)
421                 return -EINVAL;
422
423         data->id = mid->driver_data;
424
425         info = &data->info;
426
427         info->pages = 1;
428         info->format[PSC_VOLTAGE_IN] = direct;
429         info->format[PSC_VOLTAGE_OUT] = direct;
430         info->format[PSC_CURRENT_OUT] = direct;
431         info->format[PSC_POWER] = direct;
432         info->format[PSC_TEMPERATURE] = direct;
433         info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
434
435         info->read_word_data = adm1275_read_word_data;
436         info->read_byte_data = adm1275_read_byte_data;
437         info->write_word_data = adm1275_write_word_data;
438
439         switch (data->id) {
440         case adm1075:
441                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
442                         data->have_oc_fault = true;
443                 else
444                         data->have_uc_fault = true;
445                 data->have_pin_max = true;
446                 data->have_vaux_status = true;
447
448                 coefficients = adm1075_coefficients;
449                 vindex = 0;
450                 switch (config & ADM1075_IRANGE_MASK) {
451                 case ADM1075_IRANGE_25:
452                         cindex = 1;
453                         pindex = 3;
454                         break;
455                 case ADM1075_IRANGE_50:
456                         cindex = 2;
457                         pindex = 4;
458                         break;
459                 default:
460                         dev_err(&client->dev, "Invalid input current range");
461                         break;
462                 }
463
464                 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
465                   | PMBUS_HAVE_STATUS_INPUT;
466                 if (config & ADM1275_VIN_VOUT_SELECT)
467                         info->func[0] |=
468                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
469                 break;
470         case adm1272:
471                 data->have_vout = true;
472                 data->have_pin_max = true;
473                 data->have_temp_max = true;
474
475                 coefficients = adm1272_coefficients;
476                 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
477                 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
478                 /* pindex depends on the combination of the above */
479                 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
480                 case 0:
481                 default:
482                         pindex = 4;
483                         break;
484                 case ADM1275_VRANGE:
485                         pindex = 5;
486                         break;
487                 case ADM1272_IRANGE:
488                         pindex = 6;
489                         break;
490                 case ADM1275_VRANGE | ADM1272_IRANGE:
491                         pindex = 7;
492                         break;
493                 }
494                 tindex = 8;
495
496                 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
497                         PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
498
499                 /* Enable VOUT if not enabled (it is disabled by default) */
500                 if (!(config & ADM1278_VOUT_EN)) {
501                         config |= ADM1278_VOUT_EN;
502                         ret = i2c_smbus_write_byte_data(client,
503                                                         ADM1275_PMON_CONFIG,
504                                                         config);
505                         if (ret < 0) {
506                                 dev_err(&client->dev,
507                                         "Failed to enable VOUT monitoring\n");
508                                 return -ENODEV;
509                         }
510                 }
511
512                 if (config & ADM1278_TEMP1_EN)
513                         info->func[0] |=
514                                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
515                 if (config & ADM1278_VIN_EN)
516                         info->func[0] |= PMBUS_HAVE_VIN;
517                 break;
518         case adm1275:
519                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
520                         data->have_oc_fault = true;
521                 else
522                         data->have_uc_fault = true;
523                 data->have_vout = true;
524
525                 coefficients = adm1275_coefficients;
526                 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
527                 cindex = 2;
528
529                 if (config & ADM1275_VIN_VOUT_SELECT)
530                         info->func[0] |=
531                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
532                 else
533                         info->func[0] |=
534                           PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
535                 break;
536         case adm1276:
537                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
538                         data->have_oc_fault = true;
539                 else
540                         data->have_uc_fault = true;
541                 data->have_vout = true;
542                 data->have_pin_max = true;
543
544                 coefficients = adm1276_coefficients;
545                 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
546                 cindex = 2;
547                 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
548
549                 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
550                   | PMBUS_HAVE_STATUS_INPUT;
551                 if (config & ADM1275_VIN_VOUT_SELECT)
552                         info->func[0] |=
553                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
554                 break;
555         case adm1278:
556                 data->have_vout = true;
557                 data->have_pin_max = true;
558                 data->have_temp_max = true;
559
560                 coefficients = adm1278_coefficients;
561                 vindex = 0;
562                 cindex = 1;
563                 pindex = 2;
564                 tindex = 3;
565
566                 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
567                         PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
568
569                 /* Enable VOUT if not enabled (it is disabled by default) */
570                 if (!(config & ADM1278_VOUT_EN)) {
571                         config |= ADM1278_VOUT_EN;
572                         ret = i2c_smbus_write_byte_data(client,
573                                                         ADM1275_PMON_CONFIG,
574                                                         config);
575                         if (ret < 0) {
576                                 dev_err(&client->dev,
577                                         "Failed to enable VOUT monitoring\n");
578                                 return -ENODEV;
579                         }
580                 }
581
582                 if (config & ADM1278_TEMP1_EN)
583                         info->func[0] |=
584                                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
585                 if (config & ADM1278_VIN_EN)
586                         info->func[0] |= PMBUS_HAVE_VIN;
587                 break;
588         case adm1293:
589         case adm1294:
590                 data->have_iout_min = true;
591                 data->have_pin_min = true;
592                 data->have_pin_max = true;
593                 data->have_mfr_vaux_status = true;
594
595                 coefficients = adm1293_coefficients;
596
597                 voindex = 0;
598                 switch (config & ADM1293_VIN_SEL_MASK) {
599                 case ADM1293_VIN_SEL_012:       /* 1.2V */
600                         vindex = 0;
601                         break;
602                 case ADM1293_VIN_SEL_074:       /* 7.4V */
603                         vindex = 1;
604                         break;
605                 case ADM1293_VIN_SEL_210:       /* 21V */
606                         vindex = 2;
607                         break;
608                 default:                        /* disabled */
609                         break;
610                 }
611
612                 switch (config & ADM1293_IRANGE_MASK) {
613                 case ADM1293_IRANGE_25:
614                         cindex = 3;
615                         break;
616                 case ADM1293_IRANGE_50:
617                         cindex = 4;
618                         break;
619                 case ADM1293_IRANGE_100:
620                         cindex = 5;
621                         break;
622                 case ADM1293_IRANGE_200:
623                         cindex = 6;
624                         break;
625                 }
626
627                 if (vindex >= 0)
628                         pindex = 7 + vindex * 4 + (cindex - 3);
629
630                 if (config & ADM1293_VAUX_EN)
631                         info->func[0] |=
632                                 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
633
634                 info->func[0] |= PMBUS_HAVE_PIN |
635                         PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
636
637                 break;
638         default:
639                 dev_err(&client->dev, "Unsupported device\n");
640                 return -ENODEV;
641         }
642
643         if (voindex < 0)
644                 voindex = vindex;
645         if (vindex >= 0) {
646                 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
647                 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
648                 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
649         }
650         if (voindex >= 0) {
651                 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
652                 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
653                 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
654         }
655         if (cindex >= 0) {
656                 /* Scale current with sense resistor value */
657                 info->m[PSC_CURRENT_OUT] =
658                         coefficients[cindex].m * shunt / 1000;
659                 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
660                 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
661         }
662         if (pindex >= 0) {
663                 info->m[PSC_POWER] =
664                         coefficients[pindex].m * shunt / 1000;
665                 info->b[PSC_POWER] = coefficients[pindex].b;
666                 info->R[PSC_POWER] = coefficients[pindex].R;
667         }
668         if (tindex >= 0) {
669                 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
670                 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
671                 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
672         }
673
674         return pmbus_do_probe(client, id, info);
675 }
676
677 static struct i2c_driver adm1275_driver = {
678         .driver = {
679                    .name = "adm1275",
680                    },
681         .probe = adm1275_probe,
682         .remove = pmbus_do_remove,
683         .id_table = adm1275_id,
684 };
685
686 module_i2c_driver(adm1275_driver);
687
688 MODULE_AUTHOR("Guenter Roeck");
689 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
690 MODULE_LICENSE("GPL");