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442aba78 GR |
1 | /* |
2 | * Hardware monitoring driver for PMBus devices | |
3 | * | |
4 | * Copyright (c) 2010, 2011 Ericsson AB. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/i2c.h> | |
27 | #include <linux/hwmon.h> | |
28 | #include <linux/hwmon-sysfs.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/i2c/pmbus.h> | |
31 | #include "pmbus.h" | |
32 | ||
33 | /* | |
34 | * Constants needed to determine number of sensors, booleans, and labels. | |
35 | */ | |
36 | #define PMBUS_MAX_INPUT_SENSORS 11 /* 6*volt, 3*curr, 2*power */ | |
37 | #define PMBUS_VOUT_SENSORS_PER_PAGE 5 /* input, min, max, lcrit, | |
38 | crit */ | |
39 | #define PMBUS_IOUT_SENSORS_PER_PAGE 4 /* input, min, max, crit */ | |
40 | #define PMBUS_POUT_SENSORS_PER_PAGE 4 /* input, cap, max, crit */ | |
41 | #define PMBUS_MAX_SENSORS_PER_FAN 1 /* input */ | |
42 | #define PMBUS_MAX_SENSORS_PER_TEMP 5 /* input, min, max, lcrit, | |
43 | crit */ | |
44 | ||
45 | #define PMBUS_MAX_INPUT_BOOLEANS 7 /* v: min_alarm, max_alarm, | |
46 | lcrit_alarm, crit_alarm; | |
47 | c: alarm, crit_alarm; | |
48 | p: crit_alarm */ | |
49 | #define PMBUS_VOUT_BOOLEANS_PER_PAGE 4 /* min_alarm, max_alarm, | |
50 | lcrit_alarm, crit_alarm */ | |
51 | #define PMBUS_IOUT_BOOLEANS_PER_PAGE 3 /* alarm, lcrit_alarm, | |
52 | crit_alarm */ | |
53 | #define PMBUS_POUT_BOOLEANS_PER_PAGE 2 /* alarm, crit_alarm */ | |
54 | #define PMBUS_MAX_BOOLEANS_PER_FAN 2 /* alarm, fault */ | |
55 | #define PMBUS_MAX_BOOLEANS_PER_TEMP 4 /* min_alarm, max_alarm, | |
56 | lcrit_alarm, crit_alarm */ | |
57 | ||
58 | #define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */ | |
59 | ||
60 | /* | |
61 | * status, status_vout, status_iout, status_fans, and status_temp | |
62 | * are paged. status_input and status_fan34 are unpaged. | |
63 | * status_fan34 is a special case to handle a second set of fans | |
64 | * on page 0. | |
65 | */ | |
66 | #define PB_NUM_STATUS_REG (PMBUS_PAGES * 5 + 2) | |
67 | ||
68 | /* | |
69 | * Index into status register array, per status register group | |
70 | */ | |
71 | #define PB_STATUS_BASE 0 | |
72 | #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) | |
73 | #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) | |
74 | #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) | |
75 | #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) | |
76 | #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + 1) | |
77 | #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1) | |
78 | ||
79 | struct pmbus_sensor { | |
80 | char name[I2C_NAME_SIZE]; /* sysfs sensor name */ | |
81 | struct sensor_device_attribute attribute; | |
82 | u8 page; /* page number */ | |
83 | u8 reg; /* register */ | |
84 | enum pmbus_sensor_classes class; /* sensor class */ | |
85 | bool update; /* runtime sensor update needed */ | |
86 | int data; /* Sensor data. | |
87 | Negative if there was a read error */ | |
88 | }; | |
89 | ||
90 | struct pmbus_boolean { | |
91 | char name[I2C_NAME_SIZE]; /* sysfs boolean name */ | |
92 | struct sensor_device_attribute attribute; | |
93 | }; | |
94 | ||
95 | struct pmbus_label { | |
96 | char name[I2C_NAME_SIZE]; /* sysfs label name */ | |
97 | struct sensor_device_attribute attribute; | |
98 | char label[I2C_NAME_SIZE]; /* label */ | |
99 | }; | |
100 | ||
101 | struct pmbus_data { | |
102 | struct device *hwmon_dev; | |
103 | ||
104 | u32 flags; /* from platform data */ | |
105 | ||
106 | int exponent; /* linear mode: exponent for output voltages */ | |
107 | ||
108 | const struct pmbus_driver_info *info; | |
109 | ||
110 | int max_attributes; | |
111 | int num_attributes; | |
112 | struct attribute **attributes; | |
113 | struct attribute_group group; | |
114 | ||
115 | /* | |
116 | * Sensors cover both sensor and limit registers. | |
117 | */ | |
118 | int max_sensors; | |
119 | int num_sensors; | |
120 | struct pmbus_sensor *sensors; | |
121 | /* | |
122 | * Booleans are used for alarms. | |
123 | * Values are determined from status registers. | |
124 | */ | |
125 | int max_booleans; | |
126 | int num_booleans; | |
127 | struct pmbus_boolean *booleans; | |
128 | /* | |
129 | * Labels are used to map generic names (e.g., "in1") | |
130 | * to PMBus specific names (e.g., "vin" or "vout1"). | |
131 | */ | |
132 | int max_labels; | |
133 | int num_labels; | |
134 | struct pmbus_label *labels; | |
135 | ||
136 | struct mutex update_lock; | |
137 | bool valid; | |
138 | unsigned long last_updated; /* in jiffies */ | |
139 | ||
140 | /* | |
141 | * A single status register covers multiple attributes, | |
142 | * so we keep them all together. | |
143 | */ | |
144 | u8 status_bits; | |
145 | u8 status[PB_NUM_STATUS_REG]; | |
146 | ||
147 | u8 currpage; | |
148 | }; | |
149 | ||
150 | int pmbus_set_page(struct i2c_client *client, u8 page) | |
151 | { | |
152 | struct pmbus_data *data = i2c_get_clientdata(client); | |
153 | int rv = 0; | |
154 | int newpage; | |
155 | ||
156 | if (page != data->currpage) { | |
157 | rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); | |
158 | newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); | |
159 | if (newpage != page) | |
160 | rv = -EINVAL; | |
161 | else | |
162 | data->currpage = page; | |
163 | } | |
164 | return rv; | |
165 | } | |
166 | EXPORT_SYMBOL_GPL(pmbus_set_page); | |
167 | ||
168 | static int pmbus_write_byte(struct i2c_client *client, u8 page, u8 value) | |
169 | { | |
170 | int rv; | |
171 | ||
172 | rv = pmbus_set_page(client, page); | |
173 | if (rv < 0) | |
174 | return rv; | |
175 | ||
176 | return i2c_smbus_write_byte(client, value); | |
177 | } | |
178 | ||
179 | static int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, | |
180 | u16 word) | |
181 | { | |
182 | int rv; | |
183 | ||
184 | rv = pmbus_set_page(client, page); | |
185 | if (rv < 0) | |
186 | return rv; | |
187 | ||
188 | return i2c_smbus_write_word_data(client, reg, word); | |
189 | } | |
190 | ||
191 | int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) | |
192 | { | |
193 | int rv; | |
194 | ||
195 | rv = pmbus_set_page(client, page); | |
196 | if (rv < 0) | |
197 | return rv; | |
198 | ||
199 | return i2c_smbus_read_word_data(client, reg); | |
200 | } | |
201 | EXPORT_SYMBOL_GPL(pmbus_read_word_data); | |
202 | ||
203 | static int pmbus_read_byte_data(struct i2c_client *client, u8 page, u8 reg) | |
204 | { | |
205 | int rv; | |
206 | ||
207 | rv = pmbus_set_page(client, page); | |
208 | if (rv < 0) | |
209 | return rv; | |
210 | ||
211 | return i2c_smbus_read_byte_data(client, reg); | |
212 | } | |
213 | ||
214 | static void pmbus_clear_fault_page(struct i2c_client *client, int page) | |
215 | { | |
216 | pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); | |
217 | } | |
218 | ||
219 | void pmbus_clear_faults(struct i2c_client *client) | |
220 | { | |
221 | struct pmbus_data *data = i2c_get_clientdata(client); | |
222 | int i; | |
223 | ||
224 | for (i = 0; i < data->info->pages; i++) | |
225 | pmbus_clear_fault_page(client, i); | |
226 | } | |
227 | EXPORT_SYMBOL_GPL(pmbus_clear_faults); | |
228 | ||
229 | static int pmbus_check_status_cml(struct i2c_client *client, int page) | |
230 | { | |
231 | int status, status2; | |
232 | ||
233 | status = pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE); | |
234 | if (status < 0 || (status & PB_STATUS_CML)) { | |
235 | status2 = pmbus_read_byte_data(client, page, PMBUS_STATUS_CML); | |
236 | if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) | |
237 | return -EINVAL; | |
238 | } | |
239 | return 0; | |
240 | } | |
241 | ||
242 | bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) | |
243 | { | |
244 | int rv; | |
245 | struct pmbus_data *data = i2c_get_clientdata(client); | |
246 | ||
247 | rv = pmbus_read_byte_data(client, page, reg); | |
248 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) | |
249 | rv = pmbus_check_status_cml(client, page); | |
250 | pmbus_clear_fault_page(client, page); | |
251 | return rv >= 0; | |
252 | } | |
253 | EXPORT_SYMBOL_GPL(pmbus_check_byte_register); | |
254 | ||
255 | bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) | |
256 | { | |
257 | int rv; | |
258 | struct pmbus_data *data = i2c_get_clientdata(client); | |
259 | ||
260 | rv = pmbus_read_word_data(client, page, reg); | |
261 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) | |
262 | rv = pmbus_check_status_cml(client, page); | |
263 | pmbus_clear_fault_page(client, page); | |
264 | return rv >= 0; | |
265 | } | |
266 | EXPORT_SYMBOL_GPL(pmbus_check_word_register); | |
267 | ||
268 | const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) | |
269 | { | |
270 | struct pmbus_data *data = i2c_get_clientdata(client); | |
271 | ||
272 | return data->info; | |
273 | } | |
274 | EXPORT_SYMBOL_GPL(pmbus_get_driver_info); | |
275 | ||
276 | static int pmbus_get_status(struct i2c_client *client, int page, int reg) | |
277 | { | |
278 | struct pmbus_data *data = i2c_get_clientdata(client); | |
279 | const struct pmbus_driver_info *info = data->info; | |
280 | int status; | |
281 | ||
282 | if (info->get_status) { | |
283 | status = info->get_status(client, page, reg); | |
284 | if (status != -ENODATA) | |
285 | return status; | |
286 | } | |
287 | return pmbus_read_byte_data(client, page, reg); | |
288 | } | |
289 | ||
290 | static struct pmbus_data *pmbus_update_device(struct device *dev) | |
291 | { | |
292 | struct i2c_client *client = to_i2c_client(dev); | |
293 | struct pmbus_data *data = i2c_get_clientdata(client); | |
294 | const struct pmbus_driver_info *info = data->info; | |
295 | ||
296 | mutex_lock(&data->update_lock); | |
297 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
298 | int i; | |
299 | ||
300 | for (i = 0; i < info->pages; i++) | |
301 | data->status[PB_STATUS_BASE + i] | |
302 | = pmbus_read_byte_data(client, i, | |
303 | PMBUS_STATUS_BYTE); | |
304 | for (i = 0; i < info->pages; i++) { | |
305 | if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT)) | |
306 | continue; | |
307 | data->status[PB_STATUS_VOUT_BASE + i] | |
308 | = pmbus_get_status(client, i, PMBUS_STATUS_VOUT); | |
309 | } | |
310 | for (i = 0; i < info->pages; i++) { | |
311 | if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT)) | |
312 | continue; | |
313 | data->status[PB_STATUS_IOUT_BASE + i] | |
314 | = pmbus_get_status(client, i, PMBUS_STATUS_IOUT); | |
315 | } | |
316 | for (i = 0; i < info->pages; i++) { | |
317 | if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP)) | |
318 | continue; | |
319 | data->status[PB_STATUS_TEMP_BASE + i] | |
320 | = pmbus_get_status(client, i, | |
321 | PMBUS_STATUS_TEMPERATURE); | |
322 | } | |
323 | for (i = 0; i < info->pages; i++) { | |
324 | if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12)) | |
325 | continue; | |
326 | data->status[PB_STATUS_FAN_BASE + i] | |
327 | = pmbus_get_status(client, i, PMBUS_STATUS_FAN_12); | |
328 | } | |
329 | ||
330 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) | |
331 | data->status[PB_STATUS_INPUT_BASE] | |
332 | = pmbus_get_status(client, 0, PMBUS_STATUS_INPUT); | |
333 | ||
334 | if (info->func[0] & PMBUS_HAVE_STATUS_FAN34) | |
335 | data->status[PB_STATUS_FAN34_BASE] | |
336 | = pmbus_get_status(client, 0, PMBUS_STATUS_FAN_34); | |
337 | ||
338 | for (i = 0; i < data->num_sensors; i++) { | |
339 | struct pmbus_sensor *sensor = &data->sensors[i]; | |
340 | ||
341 | if (!data->valid || sensor->update) | |
342 | sensor->data | |
343 | = pmbus_read_word_data(client, sensor->page, | |
344 | sensor->reg); | |
345 | } | |
346 | pmbus_clear_faults(client); | |
347 | data->last_updated = jiffies; | |
348 | data->valid = 1; | |
349 | } | |
350 | mutex_unlock(&data->update_lock); | |
351 | return data; | |
352 | } | |
353 | ||
354 | /* | |
355 | * Convert linear sensor values to milli- or micro-units | |
356 | * depending on sensor type. | |
357 | */ | |
358 | static int pmbus_reg2data_linear(struct pmbus_data *data, | |
359 | struct pmbus_sensor *sensor) | |
360 | { | |
361 | s16 exponent, mantissa; | |
362 | long val; | |
363 | ||
364 | if (sensor->class == PSC_VOLTAGE_OUT) { | |
365 | exponent = data->exponent; | |
366 | mantissa = (s16) sensor->data; | |
367 | } else { | |
368 | exponent = (sensor->data >> 11) & 0x001f; | |
369 | mantissa = sensor->data & 0x07ff; | |
370 | ||
371 | if (exponent > 0x0f) | |
372 | exponent |= 0xffe0; /* sign extend exponent */ | |
373 | if (mantissa > 0x03ff) | |
374 | mantissa |= 0xf800; /* sign extend mantissa */ | |
375 | } | |
376 | ||
377 | val = mantissa; | |
378 | ||
379 | /* scale result to milli-units for all sensors except fans */ | |
380 | if (sensor->class != PSC_FAN) | |
381 | val = val * 1000L; | |
382 | ||
383 | /* scale result to micro-units for power sensors */ | |
384 | if (sensor->class == PSC_POWER) | |
385 | val = val * 1000L; | |
386 | ||
387 | if (exponent >= 0) | |
388 | val <<= exponent; | |
389 | else | |
390 | val >>= -exponent; | |
391 | ||
392 | return (int)val; | |
393 | } | |
394 | ||
395 | /* | |
396 | * Convert direct sensor values to milli- or micro-units | |
397 | * depending on sensor type. | |
398 | */ | |
399 | static int pmbus_reg2data_direct(struct pmbus_data *data, | |
400 | struct pmbus_sensor *sensor) | |
401 | { | |
402 | long val = (s16) sensor->data; | |
403 | long m, b, R; | |
404 | ||
405 | m = data->info->m[sensor->class]; | |
406 | b = data->info->b[sensor->class]; | |
407 | R = data->info->R[sensor->class]; | |
408 | ||
409 | if (m == 0) | |
410 | return 0; | |
411 | ||
412 | /* X = 1/m * (Y * 10^-R - b) */ | |
413 | R = -R; | |
414 | /* scale result to milli-units for everything but fans */ | |
415 | if (sensor->class != PSC_FAN) { | |
416 | R += 3; | |
417 | b *= 1000; | |
418 | } | |
419 | ||
420 | /* scale result to micro-units for power sensors */ | |
421 | if (sensor->class == PSC_POWER) { | |
422 | R += 3; | |
423 | b *= 1000; | |
424 | } | |
425 | ||
426 | while (R > 0) { | |
427 | val *= 10; | |
428 | R--; | |
429 | } | |
430 | while (R < 0) { | |
431 | val = DIV_ROUND_CLOSEST(val, 10); | |
432 | R++; | |
433 | } | |
434 | ||
435 | return (int)((val - b) / m); | |
436 | } | |
437 | ||
438 | static int pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) | |
439 | { | |
440 | int val; | |
441 | ||
442 | if (data->info->direct[sensor->class]) | |
443 | val = pmbus_reg2data_direct(data, sensor); | |
444 | else | |
445 | val = pmbus_reg2data_linear(data, sensor); | |
446 | ||
447 | return val; | |
448 | } | |
449 | ||
450 | #define MAX_MANTISSA (1023 * 1000) | |
451 | #define MIN_MANTISSA (511 * 1000) | |
452 | ||
453 | static u16 pmbus_data2reg_linear(struct pmbus_data *data, | |
454 | enum pmbus_sensor_classes class, long val) | |
455 | { | |
456 | s16 exponent = 0, mantissa = 0; | |
457 | bool negative = false; | |
458 | ||
459 | /* simple case */ | |
460 | if (val == 0) | |
461 | return 0; | |
462 | ||
463 | if (val < 0) { | |
464 | negative = true; | |
465 | val = -val; | |
466 | } | |
467 | ||
468 | if (class == PSC_VOLTAGE_OUT) { | |
469 | /* | |
470 | * For a static exponents, we don't have a choice | |
471 | * but to adjust the value to it. | |
472 | */ | |
473 | if (data->exponent < 0) | |
474 | val <<= -data->exponent; | |
475 | else | |
476 | val >>= data->exponent; | |
477 | val = DIV_ROUND_CLOSEST(val, 1000); | |
478 | if (val > 0x7fff) | |
479 | val = 0x7fff; | |
480 | return negative ? -val : val; | |
481 | } | |
482 | ||
483 | /* Power is in uW. Convert to mW before converting. */ | |
484 | if (class == PSC_POWER) | |
485 | val = DIV_ROUND_CLOSEST(val, 1000L); | |
486 | ||
487 | /* | |
488 | * For simplicity, convert fan data to milli-units | |
489 | * before calculating the exponent. | |
490 | */ | |
491 | if (class == PSC_FAN) | |
492 | val = val * 1000; | |
493 | ||
494 | /* Reduce large mantissa until it fits into 10 bit */ | |
495 | while (val >= MAX_MANTISSA && exponent < 15) { | |
496 | exponent++; | |
497 | val >>= 1; | |
498 | } | |
499 | /* Increase small mantissa to improve precision */ | |
500 | while (val < MIN_MANTISSA && exponent > -15) { | |
501 | exponent--; | |
502 | val <<= 1; | |
503 | } | |
504 | ||
505 | /* Convert mantissa from milli-units to units */ | |
506 | mantissa = DIV_ROUND_CLOSEST(val, 1000); | |
507 | ||
508 | /* Ensure that resulting number is within range */ | |
509 | if (mantissa > 0x3ff) | |
510 | mantissa = 0x3ff; | |
511 | ||
512 | /* restore sign */ | |
513 | if (negative) | |
514 | mantissa = -mantissa; | |
515 | ||
516 | /* Convert to 5 bit exponent, 11 bit mantissa */ | |
517 | return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); | |
518 | } | |
519 | ||
520 | static u16 pmbus_data2reg_direct(struct pmbus_data *data, | |
521 | enum pmbus_sensor_classes class, long val) | |
522 | { | |
523 | long m, b, R; | |
524 | ||
525 | m = data->info->m[class]; | |
526 | b = data->info->b[class]; | |
527 | R = data->info->R[class]; | |
528 | ||
529 | /* Power is in uW. Adjust R and b. */ | |
530 | if (class == PSC_POWER) { | |
531 | R -= 3; | |
532 | b *= 1000; | |
533 | } | |
534 | ||
535 | /* Calculate Y = (m * X + b) * 10^R */ | |
536 | if (class != PSC_FAN) { | |
537 | R -= 3; /* Adjust R and b for data in milli-units */ | |
538 | b *= 1000; | |
539 | } | |
540 | val = val * m + b; | |
541 | ||
542 | while (R > 0) { | |
543 | val *= 10; | |
544 | R--; | |
545 | } | |
546 | while (R < 0) { | |
547 | val = DIV_ROUND_CLOSEST(val, 10); | |
548 | R++; | |
549 | } | |
550 | ||
551 | return val; | |
552 | } | |
553 | ||
554 | static u16 pmbus_data2reg(struct pmbus_data *data, | |
555 | enum pmbus_sensor_classes class, long val) | |
556 | { | |
557 | u16 regval; | |
558 | ||
559 | if (data->info->direct[class]) | |
560 | regval = pmbus_data2reg_direct(data, class, val); | |
561 | else | |
562 | regval = pmbus_data2reg_linear(data, class, val); | |
563 | ||
564 | return regval; | |
565 | } | |
566 | ||
567 | /* | |
568 | * Return boolean calculated from converted data. | |
569 | * <index> defines a status register index and mask, and optionally | |
570 | * two sensor indexes. | |
571 | * The upper half-word references the two sensors, | |
572 | * two sensor indices. | |
573 | * The upper half-word references the two optional sensors, | |
574 | * the lower half word references status register and mask. | |
575 | * The function returns true if (status[reg] & mask) is true and, | |
576 | * if specified, if v1 >= v2. | |
577 | * To determine if an object exceeds upper limits, specify <v, limit>. | |
578 | * To determine if an object exceeds lower limits, specify <limit, v>. | |
579 | * | |
580 | * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of | |
581 | * index are set. s1 and s2 (the sensor index values) are zero in this case. | |
582 | * The function returns true if (status[reg] & mask) is true. | |
583 | * | |
584 | * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against | |
585 | * a specified limit has to be performed to determine the boolean result. | |
586 | * In this case, the function returns true if v1 >= v2 (where v1 and v2 are | |
587 | * sensor values referenced by sensor indices s1 and s2). | |
588 | * | |
589 | * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. | |
590 | * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. | |
591 | * | |
592 | * If a negative value is stored in any of the referenced registers, this value | |
593 | * reflects an error code which will be returned. | |
594 | */ | |
595 | static int pmbus_get_boolean(struct pmbus_data *data, int index, int *val) | |
596 | { | |
597 | u8 s1 = (index >> 24) & 0xff; | |
598 | u8 s2 = (index >> 16) & 0xff; | |
599 | u8 reg = (index >> 8) & 0xff; | |
600 | u8 mask = index & 0xff; | |
601 | int status; | |
602 | u8 regval; | |
603 | ||
604 | status = data->status[reg]; | |
605 | if (status < 0) | |
606 | return status; | |
607 | ||
608 | regval = status & mask; | |
609 | if (!s1 && !s2) | |
610 | *val = !!regval; | |
611 | else { | |
612 | int v1, v2; | |
613 | struct pmbus_sensor *sensor1, *sensor2; | |
614 | ||
615 | sensor1 = &data->sensors[s1]; | |
616 | if (sensor1->data < 0) | |
617 | return sensor1->data; | |
618 | sensor2 = &data->sensors[s2]; | |
619 | if (sensor2->data < 0) | |
620 | return sensor2->data; | |
621 | ||
622 | v1 = pmbus_reg2data(data, sensor1); | |
623 | v2 = pmbus_reg2data(data, sensor2); | |
624 | *val = !!(regval && v1 >= v2); | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static ssize_t pmbus_show_boolean(struct device *dev, | |
630 | struct device_attribute *da, char *buf) | |
631 | { | |
632 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
633 | struct pmbus_data *data = pmbus_update_device(dev); | |
634 | int val; | |
635 | int err; | |
636 | ||
637 | err = pmbus_get_boolean(data, attr->index, &val); | |
638 | if (err) | |
639 | return err; | |
640 | return snprintf(buf, PAGE_SIZE, "%d\n", val); | |
641 | } | |
642 | ||
643 | static ssize_t pmbus_show_sensor(struct device *dev, | |
644 | struct device_attribute *da, char *buf) | |
645 | { | |
646 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
647 | struct pmbus_data *data = pmbus_update_device(dev); | |
648 | struct pmbus_sensor *sensor; | |
649 | ||
650 | sensor = &data->sensors[attr->index]; | |
651 | if (sensor->data < 0) | |
652 | return sensor->data; | |
653 | ||
654 | return snprintf(buf, PAGE_SIZE, "%d\n", pmbus_reg2data(data, sensor)); | |
655 | } | |
656 | ||
657 | static ssize_t pmbus_set_sensor(struct device *dev, | |
658 | struct device_attribute *devattr, | |
659 | const char *buf, size_t count) | |
660 | { | |
661 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
662 | struct i2c_client *client = to_i2c_client(dev); | |
663 | struct pmbus_data *data = i2c_get_clientdata(client); | |
664 | struct pmbus_sensor *sensor = &data->sensors[attr->index]; | |
665 | ssize_t rv = count; | |
666 | long val = 0; | |
667 | int ret; | |
668 | u16 regval; | |
669 | ||
670 | if (strict_strtol(buf, 10, &val) < 0) | |
671 | return -EINVAL; | |
672 | ||
673 | mutex_lock(&data->update_lock); | |
674 | regval = pmbus_data2reg(data, sensor->class, val); | |
675 | ret = pmbus_write_word_data(client, sensor->page, sensor->reg, regval); | |
676 | if (ret < 0) | |
677 | rv = ret; | |
678 | else | |
679 | data->sensors[attr->index].data = regval; | |
680 | mutex_unlock(&data->update_lock); | |
681 | return rv; | |
682 | } | |
683 | ||
684 | static ssize_t pmbus_show_label(struct device *dev, | |
685 | struct device_attribute *da, char *buf) | |
686 | { | |
687 | struct i2c_client *client = to_i2c_client(dev); | |
688 | struct pmbus_data *data = i2c_get_clientdata(client); | |
689 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
690 | ||
691 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
692 | data->labels[attr->index].label); | |
693 | } | |
694 | ||
695 | #define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \ | |
696 | do { \ | |
697 | struct sensor_device_attribute *a \ | |
698 | = &data->_type##s[data->num_##_type##s].attribute; \ | |
699 | BUG_ON(data->num_attributes >= data->max_attributes); \ | |
700 | a->dev_attr.attr.name = _name; \ | |
701 | a->dev_attr.attr.mode = _mode; \ | |
702 | a->dev_attr.show = _show; \ | |
703 | a->dev_attr.store = _set; \ | |
704 | a->index = _idx; \ | |
705 | data->attributes[data->num_attributes] = &a->dev_attr.attr; \ | |
706 | data->num_attributes++; \ | |
707 | } while (0) | |
708 | ||
709 | #define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \ | |
710 | PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \ | |
711 | pmbus_show_##_type, NULL) | |
712 | ||
713 | #define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \ | |
714 | PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \ | |
715 | pmbus_show_##_type, pmbus_set_##_type) | |
716 | ||
717 | static void pmbus_add_boolean(struct pmbus_data *data, | |
718 | const char *name, const char *type, int seq, | |
719 | int idx) | |
720 | { | |
721 | struct pmbus_boolean *boolean; | |
722 | ||
723 | BUG_ON(data->num_booleans >= data->max_booleans); | |
724 | ||
725 | boolean = &data->booleans[data->num_booleans]; | |
726 | ||
727 | snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", | |
728 | name, seq, type); | |
729 | PMBUS_ADD_GET_ATTR(data, boolean->name, boolean, idx); | |
730 | data->num_booleans++; | |
731 | } | |
732 | ||
733 | static void pmbus_add_boolean_reg(struct pmbus_data *data, | |
734 | const char *name, const char *type, | |
735 | int seq, int reg, int bit) | |
736 | { | |
737 | pmbus_add_boolean(data, name, type, seq, (reg << 8) | bit); | |
738 | } | |
739 | ||
740 | static void pmbus_add_boolean_cmp(struct pmbus_data *data, | |
741 | const char *name, const char *type, | |
742 | int seq, int i1, int i2, int reg, int mask) | |
743 | { | |
744 | pmbus_add_boolean(data, name, type, seq, | |
745 | (i1 << 24) | (i2 << 16) | (reg << 8) | mask); | |
746 | } | |
747 | ||
748 | static void pmbus_add_sensor(struct pmbus_data *data, | |
749 | const char *name, const char *type, int seq, | |
750 | int page, int reg, enum pmbus_sensor_classes class, | |
751 | bool update) | |
752 | { | |
753 | struct pmbus_sensor *sensor; | |
754 | ||
755 | BUG_ON(data->num_sensors >= data->max_sensors); | |
756 | ||
757 | sensor = &data->sensors[data->num_sensors]; | |
758 | snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", | |
759 | name, seq, type); | |
760 | sensor->page = page; | |
761 | sensor->reg = reg; | |
762 | sensor->class = class; | |
763 | sensor->update = update; | |
764 | if (update) | |
765 | PMBUS_ADD_GET_ATTR(data, sensor->name, sensor, | |
766 | data->num_sensors); | |
767 | else | |
768 | PMBUS_ADD_SET_ATTR(data, sensor->name, sensor, | |
769 | data->num_sensors); | |
770 | data->num_sensors++; | |
771 | } | |
772 | ||
773 | static void pmbus_add_label(struct pmbus_data *data, | |
774 | const char *name, int seq, | |
775 | const char *lstring, int index) | |
776 | { | |
777 | struct pmbus_label *label; | |
778 | ||
779 | BUG_ON(data->num_labels >= data->max_labels); | |
780 | ||
781 | label = &data->labels[data->num_labels]; | |
782 | snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); | |
783 | if (!index) | |
784 | strncpy(label->label, lstring, sizeof(label->label) - 1); | |
785 | else | |
786 | snprintf(label->label, sizeof(label->label), "%s%d", lstring, | |
787 | index); | |
788 | ||
789 | PMBUS_ADD_GET_ATTR(data, label->name, label, data->num_labels); | |
790 | data->num_labels++; | |
791 | } | |
792 | ||
793 | static const int pmbus_temp_registers[] = { | |
794 | PMBUS_READ_TEMPERATURE_1, | |
795 | PMBUS_READ_TEMPERATURE_2, | |
796 | PMBUS_READ_TEMPERATURE_3 | |
797 | }; | |
798 | ||
799 | static const int pmbus_fan_registers[] = { | |
800 | PMBUS_READ_FAN_SPEED_1, | |
801 | PMBUS_READ_FAN_SPEED_2, | |
802 | PMBUS_READ_FAN_SPEED_3, | |
803 | PMBUS_READ_FAN_SPEED_4 | |
804 | }; | |
805 | ||
806 | static const int pmbus_fan_config_registers[] = { | |
807 | PMBUS_FAN_CONFIG_12, | |
808 | PMBUS_FAN_CONFIG_12, | |
809 | PMBUS_FAN_CONFIG_34, | |
810 | PMBUS_FAN_CONFIG_34 | |
811 | }; | |
812 | ||
813 | static const int pmbus_fan_status_registers[] = { | |
814 | PMBUS_STATUS_FAN_12, | |
815 | PMBUS_STATUS_FAN_12, | |
816 | PMBUS_STATUS_FAN_34, | |
817 | PMBUS_STATUS_FAN_34 | |
818 | }; | |
819 | ||
820 | /* | |
821 | * Determine maximum number of sensors, booleans, and labels. | |
822 | * To keep things simple, only make a rough high estimate. | |
823 | */ | |
824 | static void pmbus_find_max_attr(struct i2c_client *client, | |
825 | struct pmbus_data *data) | |
826 | { | |
827 | const struct pmbus_driver_info *info = data->info; | |
828 | int page, max_sensors, max_booleans, max_labels; | |
829 | ||
830 | max_sensors = PMBUS_MAX_INPUT_SENSORS; | |
831 | max_booleans = PMBUS_MAX_INPUT_BOOLEANS; | |
832 | max_labels = PMBUS_MAX_INPUT_LABELS; | |
833 | ||
834 | for (page = 0; page < info->pages; page++) { | |
835 | if (info->func[page] & PMBUS_HAVE_VOUT) { | |
836 | max_sensors += PMBUS_VOUT_SENSORS_PER_PAGE; | |
837 | max_booleans += PMBUS_VOUT_BOOLEANS_PER_PAGE; | |
838 | max_labels++; | |
839 | } | |
840 | if (info->func[page] & PMBUS_HAVE_IOUT) { | |
841 | max_sensors += PMBUS_IOUT_SENSORS_PER_PAGE; | |
842 | max_booleans += PMBUS_IOUT_BOOLEANS_PER_PAGE; | |
843 | max_labels++; | |
844 | } | |
845 | if (info->func[page] & PMBUS_HAVE_POUT) { | |
846 | max_sensors += PMBUS_POUT_SENSORS_PER_PAGE; | |
847 | max_booleans += PMBUS_POUT_BOOLEANS_PER_PAGE; | |
848 | max_labels++; | |
849 | } | |
850 | if (info->func[page] & PMBUS_HAVE_FAN12) { | |
851 | if (page == 0) { | |
852 | max_sensors += | |
853 | ARRAY_SIZE(pmbus_fan_registers) * | |
854 | PMBUS_MAX_SENSORS_PER_FAN; | |
855 | max_booleans += | |
856 | ARRAY_SIZE(pmbus_fan_registers) * | |
857 | PMBUS_MAX_BOOLEANS_PER_FAN; | |
858 | } else { | |
859 | max_sensors += PMBUS_MAX_SENSORS_PER_FAN; | |
860 | max_booleans += PMBUS_MAX_BOOLEANS_PER_FAN; | |
861 | } | |
862 | } | |
863 | if (info->func[page] & PMBUS_HAVE_TEMP) { | |
864 | if (page == 0) { | |
865 | max_sensors += | |
866 | ARRAY_SIZE(pmbus_temp_registers) * | |
867 | PMBUS_MAX_SENSORS_PER_TEMP; | |
868 | max_booleans += | |
869 | ARRAY_SIZE(pmbus_temp_registers) * | |
870 | PMBUS_MAX_BOOLEANS_PER_TEMP; | |
871 | } else { | |
872 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; | |
873 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; | |
874 | } | |
875 | } | |
876 | } | |
877 | data->max_sensors = max_sensors; | |
878 | data->max_booleans = max_booleans; | |
879 | data->max_labels = max_labels; | |
880 | data->max_attributes = max_sensors + max_booleans + max_labels; | |
881 | } | |
882 | ||
883 | /* | |
884 | * Search for attributes. Allocate sensors, booleans, and labels as needed. | |
885 | */ | |
886 | static void pmbus_find_attributes(struct i2c_client *client, | |
887 | struct pmbus_data *data) | |
888 | { | |
889 | const struct pmbus_driver_info *info = data->info; | |
890 | int page, i0, i1, in_index; | |
891 | ||
892 | /* | |
893 | * Input voltage sensors | |
894 | */ | |
895 | in_index = 1; | |
896 | if (info->func[0] & PMBUS_HAVE_VIN) { | |
897 | bool have_alarm = false; | |
898 | ||
899 | i0 = data->num_sensors; | |
900 | pmbus_add_label(data, "in", in_index, "vin", 0); | |
901 | pmbus_add_sensor(data, "in", "input", in_index, | |
902 | 0, PMBUS_READ_VIN, PSC_VOLTAGE_IN, true); | |
903 | if (pmbus_check_word_register(client, 0, | |
904 | PMBUS_VIN_UV_WARN_LIMIT)) { | |
905 | i1 = data->num_sensors; | |
906 | pmbus_add_sensor(data, "in", "min", in_index, | |
907 | 0, PMBUS_VIN_UV_WARN_LIMIT, | |
908 | PSC_VOLTAGE_IN, false); | |
909 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { | |
910 | pmbus_add_boolean_reg(data, "in", "min_alarm", | |
911 | in_index, | |
912 | PB_STATUS_INPUT_BASE, | |
913 | PB_VOLTAGE_UV_WARNING); | |
914 | have_alarm = true; | |
915 | } | |
916 | } | |
917 | if (pmbus_check_word_register(client, 0, | |
918 | PMBUS_VIN_UV_FAULT_LIMIT)) { | |
919 | i1 = data->num_sensors; | |
920 | pmbus_add_sensor(data, "in", "lcrit", in_index, | |
921 | 0, PMBUS_VIN_UV_FAULT_LIMIT, | |
922 | PSC_VOLTAGE_IN, false); | |
923 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { | |
924 | pmbus_add_boolean_reg(data, "in", "lcrit_alarm", | |
925 | in_index, | |
926 | PB_STATUS_INPUT_BASE, | |
927 | PB_VOLTAGE_UV_FAULT); | |
928 | have_alarm = true; | |
929 | } | |
930 | } | |
931 | if (pmbus_check_word_register(client, 0, | |
932 | PMBUS_VIN_OV_WARN_LIMIT)) { | |
933 | i1 = data->num_sensors; | |
934 | pmbus_add_sensor(data, "in", "max", in_index, | |
935 | 0, PMBUS_VIN_OV_WARN_LIMIT, | |
936 | PSC_VOLTAGE_IN, false); | |
937 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { | |
938 | pmbus_add_boolean_reg(data, "in", "max_alarm", | |
939 | in_index, | |
940 | PB_STATUS_INPUT_BASE, | |
941 | PB_VOLTAGE_OV_WARNING); | |
942 | have_alarm = true; | |
943 | } | |
944 | } | |
945 | if (pmbus_check_word_register(client, 0, | |
946 | PMBUS_VIN_OV_FAULT_LIMIT)) { | |
947 | i1 = data->num_sensors; | |
948 | pmbus_add_sensor(data, "in", "crit", in_index, | |
949 | 0, PMBUS_VIN_OV_FAULT_LIMIT, | |
950 | PSC_VOLTAGE_IN, false); | |
951 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { | |
952 | pmbus_add_boolean_reg(data, "in", "crit_alarm", | |
953 | in_index, | |
954 | PB_STATUS_INPUT_BASE, | |
955 | PB_VOLTAGE_OV_FAULT); | |
956 | have_alarm = true; | |
957 | } | |
958 | } | |
959 | /* | |
960 | * Add generic alarm attribute only if there are no individual | |
961 | * attributes. | |
962 | */ | |
963 | if (!have_alarm) | |
964 | pmbus_add_boolean_reg(data, "in", "alarm", | |
965 | in_index, | |
966 | PB_STATUS_BASE, | |
967 | PB_STATUS_VIN_UV); | |
968 | in_index++; | |
969 | } | |
970 | if (info->func[0] & PMBUS_HAVE_VCAP) { | |
971 | pmbus_add_label(data, "in", in_index, "vcap", 0); | |
972 | pmbus_add_sensor(data, "in", "input", in_index, 0, | |
973 | PMBUS_READ_VCAP, PSC_VOLTAGE_IN, true); | |
974 | in_index++; | |
975 | } | |
976 | ||
977 | /* | |
978 | * Output voltage sensors | |
979 | */ | |
980 | for (page = 0; page < info->pages; page++) { | |
981 | bool have_alarm = false; | |
982 | ||
983 | if (!(info->func[page] & PMBUS_HAVE_VOUT)) | |
984 | continue; | |
985 | ||
986 | i0 = data->num_sensors; | |
987 | pmbus_add_label(data, "in", in_index, "vout", page + 1); | |
988 | pmbus_add_sensor(data, "in", "input", in_index, page, | |
989 | PMBUS_READ_VOUT, PSC_VOLTAGE_OUT, true); | |
990 | if (pmbus_check_word_register(client, page, | |
991 | PMBUS_VOUT_UV_WARN_LIMIT)) { | |
992 | i1 = data->num_sensors; | |
993 | pmbus_add_sensor(data, "in", "min", in_index, page, | |
994 | PMBUS_VOUT_UV_WARN_LIMIT, | |
995 | PSC_VOLTAGE_OUT, false); | |
996 | if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { | |
997 | pmbus_add_boolean_reg(data, "in", "min_alarm", | |
998 | in_index, | |
999 | PB_STATUS_VOUT_BASE + | |
1000 | page, | |
1001 | PB_VOLTAGE_UV_WARNING); | |
1002 | have_alarm = true; | |
1003 | } | |
1004 | } | |
1005 | if (pmbus_check_word_register(client, page, | |
1006 | PMBUS_VOUT_UV_FAULT_LIMIT)) { | |
1007 | i1 = data->num_sensors; | |
1008 | pmbus_add_sensor(data, "in", "lcrit", in_index, page, | |
1009 | PMBUS_VOUT_UV_FAULT_LIMIT, | |
1010 | PSC_VOLTAGE_OUT, false); | |
1011 | if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { | |
1012 | pmbus_add_boolean_reg(data, "in", "lcrit_alarm", | |
1013 | in_index, | |
1014 | PB_STATUS_VOUT_BASE + | |
1015 | page, | |
1016 | PB_VOLTAGE_UV_FAULT); | |
1017 | have_alarm = true; | |
1018 | } | |
1019 | } | |
1020 | if (pmbus_check_word_register(client, page, | |
1021 | PMBUS_VOUT_OV_WARN_LIMIT)) { | |
1022 | i1 = data->num_sensors; | |
1023 | pmbus_add_sensor(data, "in", "max", in_index, page, | |
1024 | PMBUS_VOUT_OV_WARN_LIMIT, | |
1025 | PSC_VOLTAGE_OUT, false); | |
1026 | if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { | |
1027 | pmbus_add_boolean_reg(data, "in", "max_alarm", | |
1028 | in_index, | |
1029 | PB_STATUS_VOUT_BASE + | |
1030 | page, | |
1031 | PB_VOLTAGE_OV_WARNING); | |
1032 | have_alarm = true; | |
1033 | } | |
1034 | } | |
1035 | if (pmbus_check_word_register(client, page, | |
1036 | PMBUS_VOUT_OV_FAULT_LIMIT)) { | |
1037 | i1 = data->num_sensors; | |
1038 | pmbus_add_sensor(data, "in", "crit", in_index, page, | |
1039 | PMBUS_VOUT_OV_FAULT_LIMIT, | |
1040 | PSC_VOLTAGE_OUT, false); | |
1041 | if (info->func[page] & PMBUS_HAVE_STATUS_VOUT) { | |
1042 | pmbus_add_boolean_reg(data, "in", "crit_alarm", | |
1043 | in_index, | |
1044 | PB_STATUS_VOUT_BASE + | |
1045 | page, | |
1046 | PB_VOLTAGE_OV_FAULT); | |
1047 | have_alarm = true; | |
1048 | } | |
1049 | } | |
1050 | /* | |
1051 | * Add generic alarm attribute only if there are no individual | |
1052 | * attributes. | |
1053 | */ | |
1054 | if (!have_alarm) | |
1055 | pmbus_add_boolean_reg(data, "in", "alarm", | |
1056 | in_index, | |
1057 | PB_STATUS_BASE + page, | |
1058 | PB_STATUS_VOUT_OV); | |
1059 | in_index++; | |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * Current sensors | |
1064 | */ | |
1065 | ||
1066 | /* | |
1067 | * Input current sensors | |
1068 | */ | |
1069 | in_index = 1; | |
1070 | if (info->func[0] & PMBUS_HAVE_IIN) { | |
1071 | i0 = data->num_sensors; | |
1072 | pmbus_add_label(data, "curr", in_index, "iin", 0); | |
1073 | pmbus_add_sensor(data, "curr", "input", in_index, | |
1074 | 0, PMBUS_READ_IIN, PSC_CURRENT_IN, true); | |
1075 | if (pmbus_check_word_register(client, 0, | |
1076 | PMBUS_IIN_OC_WARN_LIMIT)) { | |
1077 | i1 = data->num_sensors; | |
1078 | pmbus_add_sensor(data, "curr", "max", in_index, | |
1079 | 0, PMBUS_IIN_OC_WARN_LIMIT, | |
1080 | PSC_CURRENT_IN, false); | |
1081 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) { | |
1082 | pmbus_add_boolean_reg(data, "curr", "max_alarm", | |
1083 | in_index, | |
1084 | PB_STATUS_INPUT_BASE, | |
1085 | PB_IIN_OC_WARNING); | |
1086 | } | |
1087 | } | |
1088 | if (pmbus_check_word_register(client, 0, | |
1089 | PMBUS_IIN_OC_FAULT_LIMIT)) { | |
1090 | i1 = data->num_sensors; | |
1091 | pmbus_add_sensor(data, "curr", "crit", in_index, | |
1092 | 0, PMBUS_IIN_OC_FAULT_LIMIT, | |
1093 | PSC_CURRENT_IN, false); | |
1094 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) | |
1095 | pmbus_add_boolean_reg(data, "curr", | |
1096 | "crit_alarm", | |
1097 | in_index, | |
1098 | PB_STATUS_INPUT_BASE, | |
1099 | PB_IIN_OC_FAULT); | |
1100 | } | |
1101 | in_index++; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Output current sensors | |
1106 | */ | |
1107 | for (page = 0; page < info->pages; page++) { | |
1108 | bool have_alarm = false; | |
1109 | ||
1110 | if (!(info->func[page] & PMBUS_HAVE_IOUT)) | |
1111 | continue; | |
1112 | ||
1113 | i0 = data->num_sensors; | |
1114 | pmbus_add_label(data, "curr", in_index, "iout", page + 1); | |
1115 | pmbus_add_sensor(data, "curr", "input", in_index, page, | |
1116 | PMBUS_READ_IOUT, PSC_CURRENT_OUT, true); | |
1117 | if (pmbus_check_word_register(client, page, | |
1118 | PMBUS_IOUT_OC_WARN_LIMIT)) { | |
1119 | i1 = data->num_sensors; | |
1120 | pmbus_add_sensor(data, "curr", "max", in_index, page, | |
1121 | PMBUS_IOUT_OC_WARN_LIMIT, | |
1122 | PSC_CURRENT_OUT, false); | |
1123 | if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) { | |
1124 | pmbus_add_boolean_reg(data, "curr", "max_alarm", | |
1125 | in_index, | |
1126 | PB_STATUS_IOUT_BASE + | |
1127 | page, PB_IOUT_OC_WARNING); | |
1128 | have_alarm = true; | |
1129 | } | |
1130 | } | |
1131 | if (pmbus_check_word_register(client, page, | |
1132 | PMBUS_IOUT_UC_FAULT_LIMIT)) { | |
1133 | i1 = data->num_sensors; | |
1134 | pmbus_add_sensor(data, "curr", "lcrit", in_index, page, | |
1135 | PMBUS_IOUT_UC_FAULT_LIMIT, | |
1136 | PSC_CURRENT_OUT, false); | |
1137 | if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) { | |
1138 | pmbus_add_boolean_reg(data, "curr", | |
1139 | "lcrit_alarm", | |
1140 | in_index, | |
1141 | PB_STATUS_IOUT_BASE + | |
1142 | page, PB_IOUT_UC_FAULT); | |
1143 | have_alarm = true; | |
1144 | } | |
1145 | } | |
1146 | if (pmbus_check_word_register(client, page, | |
1147 | PMBUS_IOUT_OC_FAULT_LIMIT)) { | |
1148 | i1 = data->num_sensors; | |
1149 | pmbus_add_sensor(data, "curr", "crit", in_index, page, | |
1150 | PMBUS_IOUT_OC_FAULT_LIMIT, | |
1151 | PSC_CURRENT_OUT, false); | |
1152 | if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) { | |
1153 | pmbus_add_boolean_reg(data, "curr", | |
1154 | "crit_alarm", | |
1155 | in_index, | |
1156 | PB_STATUS_IOUT_BASE + | |
1157 | page, PB_IOUT_OC_FAULT); | |
1158 | have_alarm = true; | |
1159 | } | |
1160 | } | |
1161 | /* | |
1162 | * Add generic alarm attribute only if there are no individual | |
1163 | * attributes. | |
1164 | */ | |
1165 | if (!have_alarm) | |
1166 | pmbus_add_boolean_reg(data, "curr", "alarm", | |
1167 | in_index, | |
1168 | PB_STATUS_BASE + page, | |
1169 | PB_STATUS_IOUT_OC); | |
1170 | in_index++; | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Power sensors | |
1175 | */ | |
1176 | /* | |
1177 | * Input Power sensors | |
1178 | */ | |
1179 | in_index = 1; | |
1180 | if (info->func[0] & PMBUS_HAVE_PIN) { | |
1181 | i0 = data->num_sensors; | |
1182 | pmbus_add_label(data, "power", in_index, "pin", 0); | |
1183 | pmbus_add_sensor(data, "power", "input", in_index, | |
1184 | 0, PMBUS_READ_PIN, PSC_POWER, true); | |
1185 | if (pmbus_check_word_register(client, 0, | |
1186 | PMBUS_PIN_OP_WARN_LIMIT)) { | |
1187 | i1 = data->num_sensors; | |
1188 | pmbus_add_sensor(data, "power", "max", in_index, | |
1189 | 0, PMBUS_PIN_OP_WARN_LIMIT, PSC_POWER, | |
1190 | false); | |
1191 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) | |
1192 | pmbus_add_boolean_reg(data, "power", | |
1193 | "alarm", | |
1194 | in_index, | |
1195 | PB_STATUS_INPUT_BASE, | |
1196 | PB_PIN_OP_WARNING); | |
1197 | } | |
1198 | in_index++; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Output Power sensors | |
1203 | */ | |
1204 | for (page = 0; page < info->pages; page++) { | |
1205 | bool need_alarm = false; | |
1206 | ||
1207 | if (!(info->func[page] & PMBUS_HAVE_POUT)) | |
1208 | continue; | |
1209 | ||
1210 | i0 = data->num_sensors; | |
1211 | pmbus_add_label(data, "power", in_index, "pout", page + 1); | |
1212 | pmbus_add_sensor(data, "power", "input", in_index, page, | |
1213 | PMBUS_READ_POUT, PSC_POWER, true); | |
1214 | /* | |
1215 | * Per hwmon sysfs API, power_cap is to be used to limit output | |
1216 | * power. | |
1217 | * We have two registers related to maximum output power, | |
1218 | * PMBUS_POUT_MAX and PMBUS_POUT_OP_WARN_LIMIT. | |
1219 | * PMBUS_POUT_MAX matches the powerX_cap attribute definition. | |
1220 | * There is no attribute in the API to match | |
1221 | * PMBUS_POUT_OP_WARN_LIMIT. We use powerX_max for now. | |
1222 | */ | |
1223 | if (pmbus_check_word_register(client, page, PMBUS_POUT_MAX)) { | |
1224 | i1 = data->num_sensors; | |
1225 | pmbus_add_sensor(data, "power", "cap", in_index, page, | |
1226 | PMBUS_POUT_MAX, PSC_POWER, false); | |
1227 | need_alarm = true; | |
1228 | } | |
1229 | if (pmbus_check_word_register(client, page, | |
1230 | PMBUS_POUT_OP_WARN_LIMIT)) { | |
1231 | i1 = data->num_sensors; | |
1232 | pmbus_add_sensor(data, "power", "max", in_index, page, | |
1233 | PMBUS_POUT_OP_WARN_LIMIT, PSC_POWER, | |
1234 | false); | |
1235 | need_alarm = true; | |
1236 | } | |
1237 | if (need_alarm && (info->func[page] & PMBUS_HAVE_STATUS_IOUT)) | |
1238 | pmbus_add_boolean_reg(data, "power", "alarm", | |
1239 | in_index, | |
1240 | PB_STATUS_IOUT_BASE + page, | |
1241 | PB_POUT_OP_WARNING | |
1242 | | PB_POWER_LIMITING); | |
1243 | ||
1244 | if (pmbus_check_word_register(client, page, | |
1245 | PMBUS_POUT_OP_FAULT_LIMIT)) { | |
1246 | i1 = data->num_sensors; | |
1247 | pmbus_add_sensor(data, "power", "crit", in_index, page, | |
1248 | PMBUS_POUT_OP_FAULT_LIMIT, PSC_POWER, | |
1249 | false); | |
1250 | if (info->func[page] & PMBUS_HAVE_STATUS_IOUT) | |
1251 | pmbus_add_boolean_reg(data, "power", | |
1252 | "crit_alarm", | |
1253 | in_index, | |
1254 | PB_STATUS_IOUT_BASE | |
1255 | + page, | |
1256 | PB_POUT_OP_FAULT); | |
1257 | } | |
1258 | in_index++; | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Temperature sensors | |
1263 | */ | |
1264 | in_index = 1; | |
1265 | for (page = 0; page < info->pages; page++) { | |
1266 | int t, temps; | |
1267 | ||
1268 | if (!(info->func[page] & PMBUS_HAVE_TEMP)) | |
1269 | continue; | |
1270 | ||
1271 | temps = page ? 1 : ARRAY_SIZE(pmbus_temp_registers); | |
1272 | for (t = 0; t < temps; t++) { | |
1273 | bool have_alarm = false; | |
1274 | ||
1275 | if (!pmbus_check_word_register | |
1276 | (client, page, pmbus_temp_registers[t])) | |
1277 | break; | |
1278 | ||
1279 | i0 = data->num_sensors; | |
1280 | pmbus_add_sensor(data, "temp", "input", in_index, page, | |
1281 | pmbus_temp_registers[t], | |
1282 | PSC_TEMPERATURE, true); | |
1283 | ||
1284 | /* | |
1285 | * PMBus provides only one status register for TEMP1-3. | |
1286 | * Thus, we can not use the status register to determine | |
1287 | * which of the three sensors actually caused an alarm. | |
1288 | * Always compare current temperature against the limit | |
1289 | * registers to determine alarm conditions for a | |
1290 | * specific sensor. | |
1291 | */ | |
1292 | if (pmbus_check_word_register | |
1293 | (client, page, PMBUS_UT_WARN_LIMIT)) { | |
1294 | i1 = data->num_sensors; | |
1295 | pmbus_add_sensor(data, "temp", "min", in_index, | |
1296 | page, PMBUS_UT_WARN_LIMIT, | |
1297 | PSC_TEMPERATURE, false); | |
1298 | if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { | |
1299 | pmbus_add_boolean_cmp(data, "temp", | |
1300 | "min_alarm", in_index, i1, i0, | |
1301 | PB_STATUS_TEMP_BASE + page, | |
1302 | PB_TEMP_UT_WARNING); | |
1303 | have_alarm = true; | |
1304 | } | |
1305 | } | |
1306 | if (pmbus_check_word_register(client, page, | |
1307 | PMBUS_UT_FAULT_LIMIT)) { | |
1308 | i1 = data->num_sensors; | |
1309 | pmbus_add_sensor(data, "temp", "lcrit", | |
1310 | in_index, page, | |
1311 | PMBUS_UT_FAULT_LIMIT, | |
1312 | PSC_TEMPERATURE, false); | |
1313 | if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { | |
1314 | pmbus_add_boolean_cmp(data, "temp", | |
1315 | "lcrit_alarm", in_index, i1, i0, | |
1316 | PB_STATUS_TEMP_BASE + page, | |
1317 | PB_TEMP_UT_FAULT); | |
1318 | have_alarm = true; | |
1319 | } | |
1320 | } | |
1321 | if (pmbus_check_word_register | |
1322 | (client, page, PMBUS_OT_WARN_LIMIT)) { | |
1323 | i1 = data->num_sensors; | |
1324 | pmbus_add_sensor(data, "temp", "max", in_index, | |
1325 | page, PMBUS_OT_WARN_LIMIT, | |
1326 | PSC_TEMPERATURE, false); | |
1327 | if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { | |
1328 | pmbus_add_boolean_cmp(data, "temp", | |
1329 | "max_alarm", in_index, i0, i1, | |
1330 | PB_STATUS_TEMP_BASE + page, | |
1331 | PB_TEMP_OT_WARNING); | |
1332 | have_alarm = true; | |
1333 | } | |
1334 | } | |
1335 | if (pmbus_check_word_register(client, page, | |
1336 | PMBUS_OT_FAULT_LIMIT)) { | |
1337 | i1 = data->num_sensors; | |
1338 | pmbus_add_sensor(data, "temp", "crit", in_index, | |
1339 | page, PMBUS_OT_FAULT_LIMIT, | |
1340 | PSC_TEMPERATURE, false); | |
1341 | if (info->func[page] & PMBUS_HAVE_STATUS_TEMP) { | |
1342 | pmbus_add_boolean_cmp(data, "temp", | |
1343 | "crit_alarm", in_index, i0, i1, | |
1344 | PB_STATUS_TEMP_BASE + page, | |
1345 | PB_TEMP_OT_FAULT); | |
1346 | have_alarm = true; | |
1347 | } | |
1348 | } | |
1349 | /* | |
1350 | * Last resort - we were not able to create any alarm | |
1351 | * registers. Report alarm for all sensors using the | |
1352 | * status register temperature alarm bit. | |
1353 | */ | |
1354 | if (!have_alarm) | |
1355 | pmbus_add_boolean_reg(data, "temp", "alarm", | |
1356 | in_index, | |
1357 | PB_STATUS_BASE + page, | |
1358 | PB_STATUS_TEMPERATURE); | |
1359 | in_index++; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * Fans | |
1365 | */ | |
1366 | in_index = 1; | |
1367 | for (page = 0; page < info->pages; page++) { | |
1368 | int fans, f; | |
1369 | ||
1370 | if (!(info->func[page] & PMBUS_HAVE_FAN12)) | |
1371 | continue; | |
1372 | ||
1373 | fans = page ? 1 : ARRAY_SIZE(pmbus_fan_registers); | |
1374 | for (f = 0; f < fans; f++) { | |
1375 | int regval; | |
1376 | ||
1377 | if (!pmbus_check_word_register(client, page, | |
1378 | pmbus_fan_registers[f]) | |
1379 | || !pmbus_check_byte_register(client, page, | |
1380 | pmbus_fan_config_registers[f])) | |
1381 | break; | |
1382 | ||
1383 | /* | |
1384 | * Skip fan if not installed. | |
1385 | * Each fan configuration register covers multiple fans, | |
1386 | * so we have to do some magic. | |
1387 | */ | |
1388 | regval = pmbus_read_byte_data(client, page, | |
1389 | pmbus_fan_config_registers[f]); | |
1390 | if (regval < 0 || | |
1391 | (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) | |
1392 | continue; | |
1393 | ||
1394 | i0 = data->num_sensors; | |
1395 | pmbus_add_sensor(data, "fan", "input", in_index, page, | |
1396 | pmbus_fan_registers[f], PSC_FAN, true); | |
1397 | ||
1398 | /* | |
1399 | * Each fan status register covers multiple fans, | |
1400 | * so we have to do some magic. | |
1401 | */ | |
1402 | if (pmbus_check_byte_register | |
1403 | (client, page, pmbus_fan_status_registers[f])) { | |
1404 | int base; | |
1405 | ||
1406 | if (f > 1) /* fan 3, 4 */ | |
1407 | base = PB_STATUS_FAN34_BASE; | |
1408 | else | |
1409 | base = PB_STATUS_FAN_BASE + page; | |
1410 | pmbus_add_boolean_reg(data, "fan", "alarm", | |
1411 | in_index, base, | |
1412 | PB_FAN_FAN1_WARNING >> (f & 1)); | |
1413 | pmbus_add_boolean_reg(data, "fan", "fault", | |
1414 | in_index, base, | |
1415 | PB_FAN_FAN1_FAULT >> (f & 1)); | |
1416 | } | |
1417 | in_index++; | |
1418 | } | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | /* | |
1423 | * Identify chip parameters. | |
1424 | * This function is called for all chips. | |
1425 | */ | |
1426 | static int pmbus_identify_common(struct i2c_client *client, | |
1427 | struct pmbus_data *data) | |
1428 | { | |
83274c68 | 1429 | int vout_mode = -1, exponent; |
442aba78 | 1430 | |
83274c68 GR |
1431 | if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) |
1432 | vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); | |
1433 | if (vout_mode >= 0 && vout_mode != 0xff) { | |
442aba78 GR |
1434 | /* |
1435 | * Not all chips support the VOUT_MODE command, | |
1436 | * so a failure to read it is not an error. | |
1437 | */ | |
1438 | switch (vout_mode >> 5) { | |
1439 | case 0: /* linear mode */ | |
1440 | if (data->info->direct[PSC_VOLTAGE_OUT]) | |
1441 | return -ENODEV; | |
1442 | ||
1443 | exponent = vout_mode & 0x1f; | |
1444 | /* and sign-extend it */ | |
1445 | if (exponent & 0x10) | |
1446 | exponent |= ~0x1f; | |
1447 | data->exponent = exponent; | |
1448 | break; | |
1449 | case 2: /* direct mode */ | |
1450 | if (!data->info->direct[PSC_VOLTAGE_OUT]) | |
1451 | return -ENODEV; | |
1452 | break; | |
1453 | default: | |
1454 | return -ENODEV; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | /* Determine maximum number of sensors, booleans, and labels */ | |
1459 | pmbus_find_max_attr(client, data); | |
1460 | pmbus_clear_fault_page(client, 0); | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, | |
1465 | struct pmbus_driver_info *info) | |
1466 | { | |
1467 | const struct pmbus_platform_data *pdata = client->dev.platform_data; | |
1468 | struct pmbus_data *data; | |
1469 | int ret; | |
1470 | ||
1471 | if (!info) { | |
1472 | dev_err(&client->dev, "Missing chip information"); | |
1473 | return -ENODEV; | |
1474 | } | |
1475 | ||
1476 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE | |
1477 | | I2C_FUNC_SMBUS_BYTE_DATA | |
1478 | | I2C_FUNC_SMBUS_WORD_DATA)) | |
1479 | return -ENODEV; | |
1480 | ||
1481 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1482 | if (!data) { | |
1483 | dev_err(&client->dev, "No memory to allocate driver data\n"); | |
1484 | return -ENOMEM; | |
1485 | } | |
1486 | ||
1487 | i2c_set_clientdata(client, data); | |
1488 | mutex_init(&data->update_lock); | |
1489 | ||
1490 | /* | |
1491 | * Bail out if status register or PMBus revision register | |
1492 | * does not exist. | |
1493 | */ | |
1494 | if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0 | |
1495 | || i2c_smbus_read_byte_data(client, PMBUS_REVISION) < 0) { | |
1496 | dev_err(&client->dev, | |
1497 | "Status or revision register not found\n"); | |
1498 | ret = -ENODEV; | |
1499 | goto out_data; | |
1500 | } | |
1501 | ||
1502 | if (pdata) | |
1503 | data->flags = pdata->flags; | |
1504 | data->info = info; | |
1505 | ||
1506 | pmbus_clear_faults(client); | |
1507 | ||
1508 | if (info->identify) { | |
1509 | ret = (*info->identify)(client, info); | |
1510 | if (ret < 0) { | |
1511 | dev_err(&client->dev, "Chip identification failed\n"); | |
1512 | goto out_data; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | if (info->pages <= 0 || info->pages > PMBUS_PAGES) { | |
1517 | dev_err(&client->dev, "Bad number of PMBus pages: %d\n", | |
1518 | info->pages); | |
1519 | ret = -EINVAL; | |
1520 | goto out_data; | |
1521 | } | |
1522 | /* | |
1523 | * Bail out if more than one page was configured, but we can not | |
1524 | * select the highest page. This is an indication that the wrong | |
1525 | * chip type was selected. Better bail out now than keep | |
1526 | * returning errors later on. | |
1527 | */ | |
1528 | if (info->pages > 1 && pmbus_set_page(client, info->pages - 1) < 0) { | |
1529 | dev_err(&client->dev, "Failed to select page %d\n", | |
1530 | info->pages - 1); | |
1531 | ret = -EINVAL; | |
1532 | goto out_data; | |
1533 | } | |
1534 | ||
1535 | ret = pmbus_identify_common(client, data); | |
1536 | if (ret < 0) { | |
1537 | dev_err(&client->dev, "Failed to identify chip capabilities\n"); | |
1538 | goto out_data; | |
1539 | } | |
1540 | ||
1541 | ret = -ENOMEM; | |
1542 | data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors, | |
1543 | GFP_KERNEL); | |
1544 | if (!data->sensors) { | |
1545 | dev_err(&client->dev, "No memory to allocate sensor data\n"); | |
1546 | goto out_data; | |
1547 | } | |
1548 | ||
1549 | data->booleans = kzalloc(sizeof(struct pmbus_boolean) | |
1550 | * data->max_booleans, GFP_KERNEL); | |
1551 | if (!data->booleans) { | |
1552 | dev_err(&client->dev, "No memory to allocate boolean data\n"); | |
1553 | goto out_sensors; | |
1554 | } | |
1555 | ||
1556 | data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels, | |
1557 | GFP_KERNEL); | |
1558 | if (!data->labels) { | |
1559 | dev_err(&client->dev, "No memory to allocate label data\n"); | |
1560 | goto out_booleans; | |
1561 | } | |
1562 | ||
1563 | data->attributes = kzalloc(sizeof(struct attribute *) | |
1564 | * data->max_attributes, GFP_KERNEL); | |
1565 | if (!data->attributes) { | |
1566 | dev_err(&client->dev, "No memory to allocate attribute data\n"); | |
1567 | goto out_labels; | |
1568 | } | |
1569 | ||
1570 | pmbus_find_attributes(client, data); | |
1571 | ||
1572 | /* | |
1573 | * If there are no attributes, something is wrong. | |
1574 | * Bail out instead of trying to register nothing. | |
1575 | */ | |
1576 | if (!data->num_attributes) { | |
1577 | dev_err(&client->dev, "No attributes found\n"); | |
1578 | ret = -ENODEV; | |
1579 | goto out_attributes; | |
1580 | } | |
1581 | ||
1582 | /* Register sysfs hooks */ | |
1583 | data->group.attrs = data->attributes; | |
1584 | ret = sysfs_create_group(&client->dev.kobj, &data->group); | |
1585 | if (ret) { | |
1586 | dev_err(&client->dev, "Failed to create sysfs entries\n"); | |
1587 | goto out_attributes; | |
1588 | } | |
1589 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
1590 | if (IS_ERR(data->hwmon_dev)) { | |
1591 | ret = PTR_ERR(data->hwmon_dev); | |
1592 | dev_err(&client->dev, "Failed to register hwmon device\n"); | |
1593 | goto out_hwmon_device_register; | |
1594 | } | |
1595 | return 0; | |
1596 | ||
1597 | out_hwmon_device_register: | |
1598 | sysfs_remove_group(&client->dev.kobj, &data->group); | |
1599 | out_attributes: | |
1600 | kfree(data->attributes); | |
1601 | out_labels: | |
1602 | kfree(data->labels); | |
1603 | out_booleans: | |
1604 | kfree(data->booleans); | |
1605 | out_sensors: | |
1606 | kfree(data->sensors); | |
1607 | out_data: | |
1608 | kfree(data); | |
1609 | return ret; | |
1610 | } | |
1611 | EXPORT_SYMBOL_GPL(pmbus_do_probe); | |
1612 | ||
1613 | int pmbus_do_remove(struct i2c_client *client) | |
1614 | { | |
1615 | struct pmbus_data *data = i2c_get_clientdata(client); | |
1616 | hwmon_device_unregister(data->hwmon_dev); | |
1617 | sysfs_remove_group(&client->dev.kobj, &data->group); | |
1618 | kfree(data->attributes); | |
1619 | kfree(data->labels); | |
1620 | kfree(data->booleans); | |
1621 | kfree(data->sensors); | |
1622 | kfree(data); | |
1623 | return 0; | |
1624 | } | |
1625 | EXPORT_SYMBOL_GPL(pmbus_do_remove); | |
1626 | ||
1627 | MODULE_AUTHOR("Guenter Roeck"); | |
1628 | MODULE_DESCRIPTION("PMBus core driver"); | |
1629 | MODULE_LICENSE("GPL"); |