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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / hwmon / pmbus / adm1275.c
blob5caa37fbfc1870b236a95f224609aae979ed54da
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 <linux/bitfield.h>
18 #include <linux/log2.h>
19 #include "pmbus.h"
20
21 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
22
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)
26
27 #define ADM1275_PEAK_IOUT 0xd0
28 #define ADM1275_PEAK_VIN 0xd1
29 #define ADM1275_PEAK_VOUT 0xd2
30 #define ADM1275_PMON_CONFIG 0xd4
31
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))
37
38 #define ADM1272_IRANGE BIT(0)
39
40 #define ADM1278_TEMP1_EN BIT(3)
41 #define ADM1278_VIN_EN BIT(2)
42 #define ADM1278_VOUT_EN BIT(1)
43
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))
49
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))
54
55 #define ADM1293_VAUX_EN BIT(1)
56
57 #define ADM1278_PEAK_TEMP 0xd7
58 #define ADM1275_IOUT_WARN2_LIMIT 0xd7
59 #define ADM1275_DEVICE_CONFIG 0xd8
60
61 #define ADM1275_IOUT_WARN2_SELECT BIT(4)
62
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
70
71 #define ADM1075_VAUX_OV_WARN BIT(7)
72 #define ADM1075_VAUX_UV_WARN BIT(6)
73
74 #define ADM1275_VI_AVG_SHIFT 0
75 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
76 ADM1275_VI_AVG_SHIFT)
77 #define ADM1275_SAMPLES_AVG_MAX 128
78
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, \
84 ADM1278_VI_AVG_SHIFT)
85
86 struct adm1275_data {
87 int id;
88 bool have_oc_fault;
89 bool have_uc_fault;
90 bool have_vout;
91 bool have_vaux_status;
92 bool have_mfr_vaux_status;
93 bool have_iout_min;
94 bool have_pin_min;
95 bool have_pin_max;
96 bool have_temp_max;
97 bool have_power_sampling;
98 struct pmbus_driver_info info;
99 };
100
101 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
102
103 struct coefficients {
104 s16 m;
105 s16 b;
106 s16 R;
107 };
108
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 */
115 };
116
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 */
127
128 };
129
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 */
134 };
135
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 */
142 };
143
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 */
149 };
150
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 */
171 };
172
173 static int adm1275_read_pmon_config(const struct adm1275_data *data,
174 struct i2c_client *client, bool is_power)
175 {
176 int shift, ret;
177 u16 mask;
178
179 /*
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
182 * register.
183 */
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;
188 } else {
189 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
190 mask = ADM1275_VI_AVG_MASK;
191 shift = ADM1275_VI_AVG_SHIFT;
192 }
193 if (ret < 0)
194 return ret;
195
196 return (ret & mask) >> shift;
197 }
198
199 static int adm1275_write_pmon_config(const struct adm1275_data *data,
200 struct i2c_client *client,
201 bool is_power, u16 word)
202 {
203 int shift, ret;
204 u16 mask;
205
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;
210 } else {
211 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
212 mask = ADM1275_VI_AVG_MASK;
213 shift = ADM1275_VI_AVG_SHIFT;
214 }
215 if (ret < 0)
216 return ret;
217
218 word = (ret & ~mask) | ((word << shift) & mask);
219 if (data->have_power_sampling)
220 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
221 word);
222 else
223 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
224 word);
225
226 return ret;
227 }
228
229 static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
230 {
231 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
232 const struct adm1275_data *data = to_adm1275_data(info);
233 int ret = 0;
234
235 if (page > 0)
236 return -ENXIO;
237
238 switch (reg) {
239 case PMBUS_IOUT_UC_FAULT_LIMIT:
240 if (!data->have_uc_fault)
241 return -ENXIO;
242 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
243 break;
244 case PMBUS_IOUT_OC_FAULT_LIMIT:
245 if (!data->have_oc_fault)
246 return -ENXIO;
247 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
248 break;
249 case PMBUS_VOUT_OV_WARN_LIMIT:
250 if (data->have_vout)
251 return -ENODATA;
252 ret = pmbus_read_word_data(client, 0,
253 ADM1075_VAUX_OV_WARN_LIMIT);
254 break;
255 case PMBUS_VOUT_UV_WARN_LIMIT:
256 if (data->have_vout)
257 return -ENODATA;
258 ret = pmbus_read_word_data(client, 0,
259 ADM1075_VAUX_UV_WARN_LIMIT);
260 break;
261 case PMBUS_READ_VOUT:
262 if (data->have_vout)
263 return -ENODATA;
264 ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
265 break;
266 case PMBUS_VIRT_READ_IOUT_MIN:
267 if (!data->have_iout_min)
268 return -ENXIO;
269 ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
270 break;
271 case PMBUS_VIRT_READ_IOUT_MAX:
272 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
273 break;
274 case PMBUS_VIRT_READ_VOUT_MAX:
275 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
276 break;
277 case PMBUS_VIRT_READ_VIN_MAX:
278 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
279 break;
280 case PMBUS_VIRT_READ_PIN_MIN:
281 if (!data->have_pin_min)
282 return -ENXIO;
283 ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
284 break;
285 case PMBUS_VIRT_READ_PIN_MAX:
286 if (!data->have_pin_max)
287 return -ENXIO;
288 ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
289 break;
290 case PMBUS_VIRT_READ_TEMP_MAX:
291 if (!data->have_temp_max)
292 return -ENXIO;
293 ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
294 break;
295 case PMBUS_VIRT_RESET_IOUT_HISTORY:
296 case PMBUS_VIRT_RESET_VOUT_HISTORY:
297 case PMBUS_VIRT_RESET_VIN_HISTORY:
298 break;
299 case PMBUS_VIRT_RESET_PIN_HISTORY:
300 if (!data->have_pin_max)
301 return -ENXIO;
302 break;
303 case PMBUS_VIRT_RESET_TEMP_HISTORY:
304 if (!data->have_temp_max)
305 return -ENXIO;
306 break;
307 case PMBUS_VIRT_POWER_SAMPLES:
308 if (!data->have_power_sampling)
309 return -ENXIO;
310 ret = adm1275_read_pmon_config(data, client, true);
311 if (ret < 0)
312 break;
313 ret = BIT(ret);
314 break;
315 case PMBUS_VIRT_IN_SAMPLES:
316 case PMBUS_VIRT_CURR_SAMPLES:
317 ret = adm1275_read_pmon_config(data, client, false);
318 if (ret < 0)
319 break;
320 ret = BIT(ret);
321 break;
322 default:
323 ret = -ENODATA;
324 break;
325 }
326 return ret;
327 }
328
329 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
330 u16 word)
331 {
332 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
333 const struct adm1275_data *data = to_adm1275_data(info);
334 int ret;
335
336 if (page > 0)
337 return -ENXIO;
338
339 switch (reg) {
340 case PMBUS_IOUT_UC_FAULT_LIMIT:
341 case PMBUS_IOUT_OC_FAULT_LIMIT:
342 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
343 word);
344 break;
345 case PMBUS_VIRT_RESET_IOUT_HISTORY:
346 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
347 if (!ret && data->have_iout_min)
348 ret = pmbus_write_word_data(client, 0,
349 ADM1293_IOUT_MIN, 0);
350 break;
351 case PMBUS_VIRT_RESET_VOUT_HISTORY:
352 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
353 break;
354 case PMBUS_VIRT_RESET_VIN_HISTORY:
355 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
356 break;
357 case PMBUS_VIRT_RESET_PIN_HISTORY:
358 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
359 if (!ret && data->have_pin_min)
360 ret = pmbus_write_word_data(client, 0,
361 ADM1293_PIN_MIN, 0);
362 break;
363 case PMBUS_VIRT_RESET_TEMP_HISTORY:
364 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
365 break;
366 case PMBUS_VIRT_POWER_SAMPLES:
367 if (!data->have_power_sampling)
368 return -ENXIO;
369 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
370 ret = adm1275_write_pmon_config(data, client, true,
371 ilog2(word));
372 break;
373 case PMBUS_VIRT_IN_SAMPLES:
374 case PMBUS_VIRT_CURR_SAMPLES:
375 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
376 ret = adm1275_write_pmon_config(data, client, false,
377 ilog2(word));
378 break;
379 default:
380 ret = -ENODATA;
381 break;
382 }
383 return ret;
384 }
385
386 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
387 {
388 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
389 const struct adm1275_data *data = to_adm1275_data(info);
390 int mfr_status, ret;
391
392 if (page > 0)
393 return -ENXIO;
394
395 switch (reg) {
396 case PMBUS_STATUS_IOUT:
397 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
398 if (ret < 0)
399 break;
400 if (!data->have_oc_fault && !data->have_uc_fault)
401 break;
402 mfr_status = pmbus_read_byte_data(client, page,
403 PMBUS_STATUS_MFR_SPECIFIC);
404 if (mfr_status < 0)
405 return mfr_status;
406 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
407 ret |= data->have_oc_fault ?
408 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
409 }
410 break;
411 case PMBUS_STATUS_VOUT:
412 if (data->have_vout)
413 return -ENODATA;
414 ret = 0;
415 if (data->have_vaux_status) {
416 mfr_status = pmbus_read_byte_data(client, 0,
417 ADM1075_VAUX_STATUS);
418 if (mfr_status < 0)
419 return mfr_status;
420 if (mfr_status & ADM1075_VAUX_OV_WARN)
421 ret |= PB_VOLTAGE_OV_WARNING;
422 if (mfr_status & ADM1075_VAUX_UV_WARN)
423 ret |= PB_VOLTAGE_UV_WARNING;
424 } else if (data->have_mfr_vaux_status) {
425 mfr_status = pmbus_read_byte_data(client, page,
426 PMBUS_STATUS_MFR_SPECIFIC);
427 if (mfr_status < 0)
428 return mfr_status;
429 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
430 ret |= PB_VOLTAGE_OV_WARNING;
431 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
432 ret |= PB_VOLTAGE_UV_WARNING;
433 }
434 break;
435 default:
436 ret = -ENODATA;
437 break;
438 }
439 return ret;
440 }
441
442 static const struct i2c_device_id adm1275_id[] = {
443 { "adm1075", adm1075 },
444 { "adm1272", adm1272 },
445 { "adm1275", adm1275 },
446 { "adm1276", adm1276 },
447 { "adm1278", adm1278 },
448 { "adm1293", adm1293 },
449 { "adm1294", adm1294 },
450 { }
451 };
452 MODULE_DEVICE_TABLE(i2c, adm1275_id);
453
454 static int adm1275_probe(struct i2c_client *client,
455 const struct i2c_device_id *id)
456 {
457 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
458 int config, device_config;
459 int ret;
460 struct pmbus_driver_info *info;
461 struct adm1275_data *data;
462 const struct i2c_device_id *mid;
463 const struct coefficients *coefficients;
464 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
465 int tindex = -1;
466 u32 shunt;
467
468 if (!i2c_check_functionality(client->adapter,
469 I2C_FUNC_SMBUS_READ_BYTE_DATA
470 | I2C_FUNC_SMBUS_BLOCK_DATA))
471 return -ENODEV;
472
473 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
474 if (ret < 0) {
475 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
476 return ret;
477 }
478 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
479 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
480 return -ENODEV;
481 }
482
483 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
484 if (ret < 0) {
485 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
486 return ret;
487 }
488 for (mid = adm1275_id; mid->name[0]; mid++) {
489 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
490 break;
491 }
492 if (!mid->name[0]) {
493 dev_err(&client->dev, "Unsupported device\n");
494 return -ENODEV;
495 }
496
497 if (id->driver_data != mid->driver_data)
498 dev_notice(&client->dev,
499 "Device mismatch: Configured %s, detected %s\n",
500 id->name, mid->name);
501
502 config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
503 if (config < 0)
504 return config;
505
506 device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
507 if (device_config < 0)
508 return device_config;
509
510 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
511 GFP_KERNEL);
512 if (!data)
513 return -ENOMEM;
514
515 if (of_property_read_u32(client->dev.of_node,
516 "shunt-resistor-micro-ohms", &shunt))
517 shunt = 1000; /* 1 mOhm if not set via DT */
518
519 if (shunt == 0)
520 return -EINVAL;
521
522 data->id = mid->driver_data;
523
524 info = &data->info;
525
526 info->pages = 1;
527 info->format[PSC_VOLTAGE_IN] = direct;
528 info->format[PSC_VOLTAGE_OUT] = direct;
529 info->format[PSC_CURRENT_OUT] = direct;
530 info->format[PSC_POWER] = direct;
531 info->format[PSC_TEMPERATURE] = direct;
532 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
533 PMBUS_HAVE_SAMPLES;
534
535 info->read_word_data = adm1275_read_word_data;
536 info->read_byte_data = adm1275_read_byte_data;
537 info->write_word_data = adm1275_write_word_data;
538
539 switch (data->id) {
540 case adm1075:
541 if (device_config & ADM1275_IOUT_WARN2_SELECT)
542 data->have_oc_fault = true;
543 else
544 data->have_uc_fault = true;
545 data->have_pin_max = true;
546 data->have_vaux_status = true;
547
548 coefficients = adm1075_coefficients;
549 vindex = 0;
550 switch (config & ADM1075_IRANGE_MASK) {
551 case ADM1075_IRANGE_25:
552 cindex = 1;
553 pindex = 3;
554 break;
555 case ADM1075_IRANGE_50:
556 cindex = 2;
557 pindex = 4;
558 break;
559 default:
560 dev_err(&client->dev, "Invalid input current range");
561 break;
562 }
563
564 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
565 | PMBUS_HAVE_STATUS_INPUT;
566 if (config & ADM1275_VIN_VOUT_SELECT)
567 info->func[0] |=
568 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
569 break;
570 case adm1272:
571 data->have_vout = true;
572 data->have_pin_max = true;
573 data->have_temp_max = true;
574 data->have_power_sampling = true;
575
576 coefficients = adm1272_coefficients;
577 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
578 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
579 /* pindex depends on the combination of the above */
580 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
581 case 0:
582 default:
583 pindex = 4;
584 break;
585 case ADM1275_VRANGE:
586 pindex = 5;
587 break;
588 case ADM1272_IRANGE:
589 pindex = 6;
590 break;
591 case ADM1275_VRANGE | ADM1272_IRANGE:
592 pindex = 7;
593 break;
594 }
595 tindex = 8;
596
597 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
598 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
599
600 /* Enable VOUT if not enabled (it is disabled by default) */
601 if (!(config & ADM1278_VOUT_EN)) {
602 config |= ADM1278_VOUT_EN;
603 ret = i2c_smbus_write_byte_data(client,
604 ADM1275_PMON_CONFIG,
605 config);
606 if (ret < 0) {
607 dev_err(&client->dev,
608 "Failed to enable VOUT monitoring\n");
609 return -ENODEV;
610 }
611 }
612
613 if (config & ADM1278_TEMP1_EN)
614 info->func[0] |=
615 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
616 if (config & ADM1278_VIN_EN)
617 info->func[0] |= PMBUS_HAVE_VIN;
618 break;
619 case adm1275:
620 if (device_config & ADM1275_IOUT_WARN2_SELECT)
621 data->have_oc_fault = true;
622 else
623 data->have_uc_fault = true;
624 data->have_vout = true;
625
626 coefficients = adm1275_coefficients;
627 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
628 cindex = 2;
629
630 if (config & ADM1275_VIN_VOUT_SELECT)
631 info->func[0] |=
632 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
633 else
634 info->func[0] |=
635 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
636 break;
637 case adm1276:
638 if (device_config & ADM1275_IOUT_WARN2_SELECT)
639 data->have_oc_fault = true;
640 else
641 data->have_uc_fault = true;
642 data->have_vout = true;
643 data->have_pin_max = true;
644
645 coefficients = adm1276_coefficients;
646 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
647 cindex = 2;
648 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
649
650 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
651 | PMBUS_HAVE_STATUS_INPUT;
652 if (config & ADM1275_VIN_VOUT_SELECT)
653 info->func[0] |=
654 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
655 break;
656 case adm1278:
657 data->have_vout = true;
658 data->have_pin_max = true;
659 data->have_temp_max = true;
660 data->have_power_sampling = true;
661
662 coefficients = adm1278_coefficients;
663 vindex = 0;
664 cindex = 1;
665 pindex = 2;
666 tindex = 3;
667
668 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
669 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
670
671 /* Enable VOUT if not enabled (it is disabled by default) */
672 if (!(config & ADM1278_VOUT_EN)) {
673 config |= ADM1278_VOUT_EN;
674 ret = i2c_smbus_write_byte_data(client,
675 ADM1275_PMON_CONFIG,
676 config);
677 if (ret < 0) {
678 dev_err(&client->dev,
679 "Failed to enable VOUT monitoring\n");
680 return -ENODEV;
681 }
682 }
683
684 if (config & ADM1278_TEMP1_EN)
685 info->func[0] |=
686 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
687 if (config & ADM1278_VIN_EN)
688 info->func[0] |= PMBUS_HAVE_VIN;
689 break;
690 case adm1293:
691 case adm1294:
692 data->have_iout_min = true;
693 data->have_pin_min = true;
694 data->have_pin_max = true;
695 data->have_mfr_vaux_status = true;
696 data->have_power_sampling = true;
697
698 coefficients = adm1293_coefficients;
699
700 voindex = 0;
701 switch (config & ADM1293_VIN_SEL_MASK) {
702 case ADM1293_VIN_SEL_012: /* 1.2V */
703 vindex = 0;
704 break;
705 case ADM1293_VIN_SEL_074: /* 7.4V */
706 vindex = 1;
707 break;
708 case ADM1293_VIN_SEL_210: /* 21V */
709 vindex = 2;
710 break;
711 default: /* disabled */
712 break;
713 }
714
715 switch (config & ADM1293_IRANGE_MASK) {
716 case ADM1293_IRANGE_25:
717 cindex = 3;
718 break;
719 case ADM1293_IRANGE_50:
720 cindex = 4;
721 break;
722 case ADM1293_IRANGE_100:
723 cindex = 5;
724 break;
725 case ADM1293_IRANGE_200:
726 cindex = 6;
727 break;
728 }
729
730 if (vindex >= 0)
731 pindex = 7 + vindex * 4 + (cindex - 3);
732
733 if (config & ADM1293_VAUX_EN)
734 info->func[0] |=
735 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
736
737 info->func[0] |= PMBUS_HAVE_PIN |
738 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
739
740 break;
741 default:
742 dev_err(&client->dev, "Unsupported device\n");
743 return -ENODEV;
744 }
745
746 if (voindex < 0)
747 voindex = vindex;
748 if (vindex >= 0) {
749 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
750 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
751 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
752 }
753 if (voindex >= 0) {
754 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
755 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
756 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
757 }
758 if (cindex >= 0) {
759 /* Scale current with sense resistor value */
760 info->m[PSC_CURRENT_OUT] =
761 coefficients[cindex].m * shunt / 1000;
762 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
763 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
764 }
765 if (pindex >= 0) {
766 info->m[PSC_POWER] =
767 coefficients[pindex].m * shunt / 1000;
768 info->b[PSC_POWER] = coefficients[pindex].b;
769 info->R[PSC_POWER] = coefficients[pindex].R;
770 }
771 if (tindex >= 0) {
772 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
773 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
774 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
775 }
776
777 return pmbus_do_probe(client, id, info);
778 }
779
780 static struct i2c_driver adm1275_driver = {
781 .driver = {
782 .name = "adm1275",
783 },
784 .probe = adm1275_probe,
785 .remove = pmbus_do_remove,
786 .id_table = adm1275_id,
787 };
788
789 module_i2c_driver(adm1275_driver);
790
791 MODULE_AUTHOR("Guenter Roeck");
792 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
793 MODULE_LICENSE("GPL");
Linux with added FPC-III support