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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 | /* | |
954df676 GR |
61 | * status, status_vout, status_iout, status_fans, status_fan34, and status_temp |
62 | * are paged. status_input is unpaged. | |
442aba78 | 63 | */ |
954df676 | 64 | #define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1) |
442aba78 GR |
65 | |
66 | /* | |
67 | * Index into status register array, per status register group | |
68 | */ | |
69 | #define PB_STATUS_BASE 0 | |
70 | #define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) | |
71 | #define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) | |
72 | #define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) | |
73 | #define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) | |
954df676 | 74 | #define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) |
442aba78 GR |
75 | #define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1) |
76 | ||
2bd05bf4 GR |
77 | #define PMBUS_NAME_SIZE 24 |
78 | ||
442aba78 | 79 | struct pmbus_sensor { |
2bd05bf4 | 80 | char name[PMBUS_NAME_SIZE]; /* sysfs sensor name */ |
442aba78 GR |
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 { | |
2bd05bf4 | 91 | char name[PMBUS_NAME_SIZE]; /* sysfs boolean name */ |
442aba78 GR |
92 | struct sensor_device_attribute attribute; |
93 | }; | |
94 | ||
95 | struct pmbus_label { | |
2bd05bf4 | 96 | char name[PMBUS_NAME_SIZE]; /* sysfs label name */ |
442aba78 | 97 | struct sensor_device_attribute attribute; |
2bd05bf4 | 98 | char label[PMBUS_NAME_SIZE]; /* label */ |
442aba78 GR |
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 | */ | |
442aba78 GR |
144 | u8 status[PB_NUM_STATUS_REG]; |
145 | ||
146 | u8 currpage; | |
147 | }; | |
148 | ||
149 | int pmbus_set_page(struct i2c_client *client, u8 page) | |
150 | { | |
151 | struct pmbus_data *data = i2c_get_clientdata(client); | |
152 | int rv = 0; | |
153 | int newpage; | |
154 | ||
155 | if (page != data->currpage) { | |
156 | rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); | |
157 | newpage = i2c_smbus_read_byte_data(client, PMBUS_PAGE); | |
158 | if (newpage != page) | |
159 | rv = -EINVAL; | |
160 | else | |
161 | data->currpage = page; | |
162 | } | |
163 | return rv; | |
164 | } | |
165 | EXPORT_SYMBOL_GPL(pmbus_set_page); | |
166 | ||
9c1ed894 | 167 | static int pmbus_write_byte(struct i2c_client *client, int page, u8 value) |
442aba78 GR |
168 | { |
169 | int rv; | |
170 | ||
9c1ed894 GR |
171 | if (page >= 0) { |
172 | rv = pmbus_set_page(client, page); | |
173 | if (rv < 0) | |
174 | return rv; | |
175 | } | |
442aba78 GR |
176 | |
177 | return i2c_smbus_write_byte(client, value); | |
178 | } | |
179 | ||
46243f3a | 180 | int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word) |
442aba78 GR |
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 | } | |
46243f3a GR |
190 | EXPORT_SYMBOL_GPL(pmbus_write_word_data); |
191 | ||
192 | /* | |
193 | * _pmbus_write_word_data() is similar to pmbus_write_word_data(), but checks if | |
194 | * a device specific mapping function exists and calls it if necessary. | |
195 | */ | |
196 | static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, | |
197 | u16 word) | |
198 | { | |
199 | struct pmbus_data *data = i2c_get_clientdata(client); | |
200 | const struct pmbus_driver_info *info = data->info; | |
201 | int status; | |
202 | ||
203 | if (info->write_word_data) { | |
204 | status = info->write_word_data(client, page, reg, word); | |
205 | if (status != -ENODATA) | |
206 | return status; | |
207 | } | |
208 | if (reg >= PMBUS_VIRT_BASE) | |
209 | return -EINVAL; | |
210 | return pmbus_write_word_data(client, page, reg, word); | |
211 | } | |
442aba78 GR |
212 | |
213 | int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg) | |
214 | { | |
215 | int rv; | |
216 | ||
217 | rv = pmbus_set_page(client, page); | |
218 | if (rv < 0) | |
219 | return rv; | |
220 | ||
221 | return i2c_smbus_read_word_data(client, reg); | |
222 | } | |
223 | EXPORT_SYMBOL_GPL(pmbus_read_word_data); | |
224 | ||
46243f3a GR |
225 | /* |
226 | * _pmbus_read_word_data() is similar to pmbus_read_word_data(), but checks if | |
227 | * a device specific mapping function exists and calls it if necessary. | |
228 | */ | |
229 | static int _pmbus_read_word_data(struct i2c_client *client, int page, int reg) | |
230 | { | |
231 | struct pmbus_data *data = i2c_get_clientdata(client); | |
232 | const struct pmbus_driver_info *info = data->info; | |
233 | int status; | |
234 | ||
235 | if (info->read_word_data) { | |
236 | status = info->read_word_data(client, page, reg); | |
237 | if (status != -ENODATA) | |
238 | return status; | |
239 | } | |
240 | return pmbus_read_word_data(client, page, reg); | |
241 | } | |
242 | ||
9c1ed894 | 243 | int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg) |
442aba78 GR |
244 | { |
245 | int rv; | |
246 | ||
9c1ed894 GR |
247 | if (page >= 0) { |
248 | rv = pmbus_set_page(client, page); | |
249 | if (rv < 0) | |
250 | return rv; | |
251 | } | |
442aba78 GR |
252 | |
253 | return i2c_smbus_read_byte_data(client, reg); | |
254 | } | |
1061d851 | 255 | EXPORT_SYMBOL_GPL(pmbus_read_byte_data); |
442aba78 | 256 | |
c6bfb767 GR |
257 | /* |
258 | * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if | |
259 | * a device specific mapping function exists and calls it if necessary. | |
260 | */ | |
261 | static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) | |
262 | { | |
263 | struct pmbus_data *data = i2c_get_clientdata(client); | |
264 | const struct pmbus_driver_info *info = data->info; | |
265 | int status; | |
266 | ||
267 | if (info->read_byte_data) { | |
268 | status = info->read_byte_data(client, page, reg); | |
269 | if (status != -ENODATA) | |
270 | return status; | |
271 | } | |
272 | return pmbus_read_byte_data(client, page, reg); | |
273 | } | |
274 | ||
442aba78 GR |
275 | static void pmbus_clear_fault_page(struct i2c_client *client, int page) |
276 | { | |
277 | pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); | |
278 | } | |
279 | ||
280 | void pmbus_clear_faults(struct i2c_client *client) | |
281 | { | |
282 | struct pmbus_data *data = i2c_get_clientdata(client); | |
283 | int i; | |
284 | ||
285 | for (i = 0; i < data->info->pages; i++) | |
286 | pmbus_clear_fault_page(client, i); | |
287 | } | |
288 | EXPORT_SYMBOL_GPL(pmbus_clear_faults); | |
289 | ||
9c1ed894 | 290 | static int pmbus_check_status_cml(struct i2c_client *client) |
442aba78 GR |
291 | { |
292 | int status, status2; | |
293 | ||
9c1ed894 | 294 | status = pmbus_read_byte_data(client, -1, PMBUS_STATUS_BYTE); |
442aba78 | 295 | if (status < 0 || (status & PB_STATUS_CML)) { |
9c1ed894 | 296 | status2 = pmbus_read_byte_data(client, -1, PMBUS_STATUS_CML); |
442aba78 GR |
297 | if (status2 < 0 || (status2 & PB_CML_FAULT_INVALID_COMMAND)) |
298 | return -EINVAL; | |
299 | } | |
300 | return 0; | |
301 | } | |
302 | ||
303 | bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) | |
304 | { | |
305 | int rv; | |
306 | struct pmbus_data *data = i2c_get_clientdata(client); | |
307 | ||
c6bfb767 | 308 | rv = _pmbus_read_byte_data(client, page, reg); |
442aba78 | 309 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) |
9c1ed894 GR |
310 | rv = pmbus_check_status_cml(client); |
311 | pmbus_clear_fault_page(client, -1); | |
442aba78 GR |
312 | return rv >= 0; |
313 | } | |
314 | EXPORT_SYMBOL_GPL(pmbus_check_byte_register); | |
315 | ||
316 | bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) | |
317 | { | |
318 | int rv; | |
319 | struct pmbus_data *data = i2c_get_clientdata(client); | |
320 | ||
321 | rv = pmbus_read_word_data(client, page, reg); | |
322 | if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) | |
9c1ed894 GR |
323 | rv = pmbus_check_status_cml(client); |
324 | pmbus_clear_fault_page(client, -1); | |
442aba78 GR |
325 | return rv >= 0; |
326 | } | |
327 | EXPORT_SYMBOL_GPL(pmbus_check_word_register); | |
328 | ||
329 | const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) | |
330 | { | |
331 | struct pmbus_data *data = i2c_get_clientdata(client); | |
332 | ||
333 | return data->info; | |
334 | } | |
335 | EXPORT_SYMBOL_GPL(pmbus_get_driver_info); | |
336 | ||
442aba78 GR |
337 | static struct pmbus_data *pmbus_update_device(struct device *dev) |
338 | { | |
339 | struct i2c_client *client = to_i2c_client(dev); | |
340 | struct pmbus_data *data = i2c_get_clientdata(client); | |
341 | const struct pmbus_driver_info *info = data->info; | |
342 | ||
343 | mutex_lock(&data->update_lock); | |
344 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
345 | int i; | |
346 | ||
347 | for (i = 0; i < info->pages; i++) | |
348 | data->status[PB_STATUS_BASE + i] | |
349 | = pmbus_read_byte_data(client, i, | |
350 | PMBUS_STATUS_BYTE); | |
351 | for (i = 0; i < info->pages; i++) { | |
352 | if (!(info->func[i] & PMBUS_HAVE_STATUS_VOUT)) | |
353 | continue; | |
354 | data->status[PB_STATUS_VOUT_BASE + i] | |
2cfa6aed | 355 | = _pmbus_read_byte_data(client, i, PMBUS_STATUS_VOUT); |
442aba78 GR |
356 | } |
357 | for (i = 0; i < info->pages; i++) { | |
358 | if (!(info->func[i] & PMBUS_HAVE_STATUS_IOUT)) | |
359 | continue; | |
360 | data->status[PB_STATUS_IOUT_BASE + i] | |
2cfa6aed | 361 | = _pmbus_read_byte_data(client, i, PMBUS_STATUS_IOUT); |
442aba78 GR |
362 | } |
363 | for (i = 0; i < info->pages; i++) { | |
364 | if (!(info->func[i] & PMBUS_HAVE_STATUS_TEMP)) | |
365 | continue; | |
366 | data->status[PB_STATUS_TEMP_BASE + i] | |
2cfa6aed GR |
367 | = _pmbus_read_byte_data(client, i, |
368 | PMBUS_STATUS_TEMPERATURE); | |
442aba78 GR |
369 | } |
370 | for (i = 0; i < info->pages; i++) { | |
371 | if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN12)) | |
372 | continue; | |
373 | data->status[PB_STATUS_FAN_BASE + i] | |
2cfa6aed GR |
374 | = _pmbus_read_byte_data(client, i, |
375 | PMBUS_STATUS_FAN_12); | |
442aba78 GR |
376 | } |
377 | ||
954df676 GR |
378 | for (i = 0; i < info->pages; i++) { |
379 | if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34)) | |
380 | continue; | |
381 | data->status[PB_STATUS_FAN34_BASE + i] | |
2cfa6aed GR |
382 | = _pmbus_read_byte_data(client, i, |
383 | PMBUS_STATUS_FAN_34); | |
954df676 GR |
384 | } |
385 | ||
442aba78 GR |
386 | if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) |
387 | data->status[PB_STATUS_INPUT_BASE] | |
2cfa6aed GR |
388 | = _pmbus_read_byte_data(client, 0, |
389 | PMBUS_STATUS_INPUT); | |
442aba78 | 390 | |
442aba78 GR |
391 | for (i = 0; i < data->num_sensors; i++) { |
392 | struct pmbus_sensor *sensor = &data->sensors[i]; | |
393 | ||
394 | if (!data->valid || sensor->update) | |
395 | sensor->data | |
46243f3a GR |
396 | = _pmbus_read_word_data(client, |
397 | sensor->page, | |
398 | sensor->reg); | |
442aba78 GR |
399 | } |
400 | pmbus_clear_faults(client); | |
401 | data->last_updated = jiffies; | |
402 | data->valid = 1; | |
403 | } | |
404 | mutex_unlock(&data->update_lock); | |
405 | return data; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Convert linear sensor values to milli- or micro-units | |
410 | * depending on sensor type. | |
411 | */ | |
f450c150 GR |
412 | static long pmbus_reg2data_linear(struct pmbus_data *data, |
413 | struct pmbus_sensor *sensor) | |
442aba78 | 414 | { |
9f6ad1ce GR |
415 | s16 exponent; |
416 | s32 mantissa; | |
442aba78 GR |
417 | long val; |
418 | ||
9f6ad1ce | 419 | if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ |
442aba78 | 420 | exponent = data->exponent; |
9f6ad1ce GR |
421 | mantissa = (u16) sensor->data; |
422 | } else { /* LINEAR11 */ | |
442aba78 GR |
423 | exponent = (sensor->data >> 11) & 0x001f; |
424 | mantissa = sensor->data & 0x07ff; | |
425 | ||
426 | if (exponent > 0x0f) | |
427 | exponent |= 0xffe0; /* sign extend exponent */ | |
428 | if (mantissa > 0x03ff) | |
9f6ad1ce | 429 | mantissa |= 0xfffff800; /* sign extend mantissa */ |
442aba78 GR |
430 | } |
431 | ||
432 | val = mantissa; | |
433 | ||
434 | /* scale result to milli-units for all sensors except fans */ | |
435 | if (sensor->class != PSC_FAN) | |
436 | val = val * 1000L; | |
437 | ||
438 | /* scale result to micro-units for power sensors */ | |
439 | if (sensor->class == PSC_POWER) | |
440 | val = val * 1000L; | |
441 | ||
442 | if (exponent >= 0) | |
443 | val <<= exponent; | |
444 | else | |
445 | val >>= -exponent; | |
446 | ||
f450c150 | 447 | return val; |
442aba78 GR |
448 | } |
449 | ||
450 | /* | |
451 | * Convert direct sensor values to milli- or micro-units | |
452 | * depending on sensor type. | |
453 | */ | |
f450c150 GR |
454 | static long pmbus_reg2data_direct(struct pmbus_data *data, |
455 | struct pmbus_sensor *sensor) | |
442aba78 GR |
456 | { |
457 | long val = (s16) sensor->data; | |
458 | long m, b, R; | |
459 | ||
460 | m = data->info->m[sensor->class]; | |
461 | b = data->info->b[sensor->class]; | |
462 | R = data->info->R[sensor->class]; | |
463 | ||
464 | if (m == 0) | |
465 | return 0; | |
466 | ||
467 | /* X = 1/m * (Y * 10^-R - b) */ | |
468 | R = -R; | |
469 | /* scale result to milli-units for everything but fans */ | |
470 | if (sensor->class != PSC_FAN) { | |
471 | R += 3; | |
472 | b *= 1000; | |
473 | } | |
474 | ||
475 | /* scale result to micro-units for power sensors */ | |
476 | if (sensor->class == PSC_POWER) { | |
477 | R += 3; | |
478 | b *= 1000; | |
479 | } | |
480 | ||
481 | while (R > 0) { | |
482 | val *= 10; | |
483 | R--; | |
484 | } | |
485 | while (R < 0) { | |
486 | val = DIV_ROUND_CLOSEST(val, 10); | |
487 | R++; | |
488 | } | |
489 | ||
f450c150 | 490 | return (val - b) / m; |
442aba78 GR |
491 | } |
492 | ||
1061d851 GR |
493 | /* |
494 | * Convert VID sensor values to milli- or micro-units | |
495 | * depending on sensor type. | |
496 | * We currently only support VR11. | |
497 | */ | |
498 | static long pmbus_reg2data_vid(struct pmbus_data *data, | |
499 | struct pmbus_sensor *sensor) | |
500 | { | |
501 | long val = sensor->data; | |
502 | ||
503 | if (val < 0x02 || val > 0xb2) | |
504 | return 0; | |
505 | return DIV_ROUND_CLOSEST(160000 - (val - 2) * 625, 100); | |
506 | } | |
507 | ||
f450c150 | 508 | static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) |
442aba78 | 509 | { |
f450c150 | 510 | long val; |
442aba78 | 511 | |
1061d851 GR |
512 | switch (data->info->format[sensor->class]) { |
513 | case direct: | |
442aba78 | 514 | val = pmbus_reg2data_direct(data, sensor); |
1061d851 GR |
515 | break; |
516 | case vid: | |
517 | val = pmbus_reg2data_vid(data, sensor); | |
518 | break; | |
519 | case linear: | |
520 | default: | |
442aba78 | 521 | val = pmbus_reg2data_linear(data, sensor); |
1061d851 GR |
522 | break; |
523 | } | |
442aba78 GR |
524 | return val; |
525 | } | |
526 | ||
527 | #define MAX_MANTISSA (1023 * 1000) | |
528 | #define MIN_MANTISSA (511 * 1000) | |
529 | ||
530 | static u16 pmbus_data2reg_linear(struct pmbus_data *data, | |
531 | enum pmbus_sensor_classes class, long val) | |
532 | { | |
9f6ad1ce | 533 | s16 exponent = 0, mantissa; |
442aba78 GR |
534 | bool negative = false; |
535 | ||
536 | /* simple case */ | |
537 | if (val == 0) | |
538 | return 0; | |
539 | ||
442aba78 | 540 | if (class == PSC_VOLTAGE_OUT) { |
9f6ad1ce GR |
541 | /* LINEAR16 does not support negative voltages */ |
542 | if (val < 0) | |
543 | return 0; | |
544 | ||
442aba78 GR |
545 | /* |
546 | * For a static exponents, we don't have a choice | |
547 | * but to adjust the value to it. | |
548 | */ | |
549 | if (data->exponent < 0) | |
550 | val <<= -data->exponent; | |
551 | else | |
552 | val >>= data->exponent; | |
553 | val = DIV_ROUND_CLOSEST(val, 1000); | |
9f6ad1ce GR |
554 | return val & 0xffff; |
555 | } | |
556 | ||
557 | if (val < 0) { | |
558 | negative = true; | |
559 | val = -val; | |
442aba78 GR |
560 | } |
561 | ||
562 | /* Power is in uW. Convert to mW before converting. */ | |
563 | if (class == PSC_POWER) | |
564 | val = DIV_ROUND_CLOSEST(val, 1000L); | |
565 | ||
566 | /* | |
567 | * For simplicity, convert fan data to milli-units | |
568 | * before calculating the exponent. | |
569 | */ | |
570 | if (class == PSC_FAN) | |
571 | val = val * 1000; | |
572 | ||
573 | /* Reduce large mantissa until it fits into 10 bit */ | |
574 | while (val >= MAX_MANTISSA && exponent < 15) { | |
575 | exponent++; | |
576 | val >>= 1; | |
577 | } | |
578 | /* Increase small mantissa to improve precision */ | |
579 | while (val < MIN_MANTISSA && exponent > -15) { | |
580 | exponent--; | |
581 | val <<= 1; | |
582 | } | |
583 | ||
584 | /* Convert mantissa from milli-units to units */ | |
585 | mantissa = DIV_ROUND_CLOSEST(val, 1000); | |
586 | ||
587 | /* Ensure that resulting number is within range */ | |
588 | if (mantissa > 0x3ff) | |
589 | mantissa = 0x3ff; | |
590 | ||
591 | /* restore sign */ | |
592 | if (negative) | |
593 | mantissa = -mantissa; | |
594 | ||
595 | /* Convert to 5 bit exponent, 11 bit mantissa */ | |
596 | return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); | |
597 | } | |
598 | ||
599 | static u16 pmbus_data2reg_direct(struct pmbus_data *data, | |
600 | enum pmbus_sensor_classes class, long val) | |
601 | { | |
602 | long m, b, R; | |
603 | ||
604 | m = data->info->m[class]; | |
605 | b = data->info->b[class]; | |
606 | R = data->info->R[class]; | |
607 | ||
608 | /* Power is in uW. Adjust R and b. */ | |
609 | if (class == PSC_POWER) { | |
610 | R -= 3; | |
611 | b *= 1000; | |
612 | } | |
613 | ||
614 | /* Calculate Y = (m * X + b) * 10^R */ | |
615 | if (class != PSC_FAN) { | |
616 | R -= 3; /* Adjust R and b for data in milli-units */ | |
617 | b *= 1000; | |
618 | } | |
619 | val = val * m + b; | |
620 | ||
621 | while (R > 0) { | |
622 | val *= 10; | |
623 | R--; | |
624 | } | |
625 | while (R < 0) { | |
626 | val = DIV_ROUND_CLOSEST(val, 10); | |
627 | R++; | |
628 | } | |
629 | ||
630 | return val; | |
631 | } | |
632 | ||
1061d851 GR |
633 | static u16 pmbus_data2reg_vid(struct pmbus_data *data, |
634 | enum pmbus_sensor_classes class, long val) | |
635 | { | |
636 | val = SENSORS_LIMIT(val, 500, 1600); | |
637 | ||
638 | return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625); | |
639 | } | |
640 | ||
442aba78 GR |
641 | static u16 pmbus_data2reg(struct pmbus_data *data, |
642 | enum pmbus_sensor_classes class, long val) | |
643 | { | |
644 | u16 regval; | |
645 | ||
1061d851 GR |
646 | switch (data->info->format[class]) { |
647 | case direct: | |
442aba78 | 648 | regval = pmbus_data2reg_direct(data, class, val); |
1061d851 GR |
649 | break; |
650 | case vid: | |
651 | regval = pmbus_data2reg_vid(data, class, val); | |
652 | break; | |
653 | case linear: | |
654 | default: | |
442aba78 | 655 | regval = pmbus_data2reg_linear(data, class, val); |
1061d851 GR |
656 | break; |
657 | } | |
442aba78 GR |
658 | return regval; |
659 | } | |
660 | ||
661 | /* | |
662 | * Return boolean calculated from converted data. | |
663 | * <index> defines a status register index and mask, and optionally | |
664 | * two sensor indexes. | |
665 | * The upper half-word references the two sensors, | |
666 | * two sensor indices. | |
667 | * The upper half-word references the two optional sensors, | |
668 | * the lower half word references status register and mask. | |
669 | * The function returns true if (status[reg] & mask) is true and, | |
670 | * if specified, if v1 >= v2. | |
671 | * To determine if an object exceeds upper limits, specify <v, limit>. | |
672 | * To determine if an object exceeds lower limits, specify <limit, v>. | |
673 | * | |
674 | * For booleans created with pmbus_add_boolean_reg(), only the lower 16 bits of | |
675 | * index are set. s1 and s2 (the sensor index values) are zero in this case. | |
676 | * The function returns true if (status[reg] & mask) is true. | |
677 | * | |
678 | * If the boolean was created with pmbus_add_boolean_cmp(), a comparison against | |
679 | * a specified limit has to be performed to determine the boolean result. | |
680 | * In this case, the function returns true if v1 >= v2 (where v1 and v2 are | |
681 | * sensor values referenced by sensor indices s1 and s2). | |
682 | * | |
683 | * To determine if an object exceeds upper limits, specify <s1,s2> = <v,limit>. | |
684 | * To determine if an object exceeds lower limits, specify <s1,s2> = <limit,v>. | |
685 | * | |
686 | * If a negative value is stored in any of the referenced registers, this value | |
687 | * reflects an error code which will be returned. | |
688 | */ | |
689 | static int pmbus_get_boolean(struct pmbus_data *data, int index, int *val) | |
690 | { | |
691 | u8 s1 = (index >> 24) & 0xff; | |
692 | u8 s2 = (index >> 16) & 0xff; | |
693 | u8 reg = (index >> 8) & 0xff; | |
694 | u8 mask = index & 0xff; | |
695 | int status; | |
696 | u8 regval; | |
697 | ||
698 | status = data->status[reg]; | |
699 | if (status < 0) | |
700 | return status; | |
701 | ||
702 | regval = status & mask; | |
703 | if (!s1 && !s2) | |
704 | *val = !!regval; | |
705 | else { | |
f450c150 | 706 | long v1, v2; |
442aba78 GR |
707 | struct pmbus_sensor *sensor1, *sensor2; |
708 | ||
709 | sensor1 = &data->sensors[s1]; | |
710 | if (sensor1->data < 0) | |
711 | return sensor1->data; | |
712 | sensor2 = &data->sensors[s2]; | |
713 | if (sensor2->data < 0) | |
714 | return sensor2->data; | |
715 | ||
716 | v1 = pmbus_reg2data(data, sensor1); | |
717 | v2 = pmbus_reg2data(data, sensor2); | |
718 | *val = !!(regval && v1 >= v2); | |
719 | } | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static ssize_t pmbus_show_boolean(struct device *dev, | |
724 | struct device_attribute *da, char *buf) | |
725 | { | |
726 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
727 | struct pmbus_data *data = pmbus_update_device(dev); | |
728 | int val; | |
729 | int err; | |
730 | ||
731 | err = pmbus_get_boolean(data, attr->index, &val); | |
732 | if (err) | |
733 | return err; | |
734 | return snprintf(buf, PAGE_SIZE, "%d\n", val); | |
735 | } | |
736 | ||
737 | static ssize_t pmbus_show_sensor(struct device *dev, | |
738 | struct device_attribute *da, char *buf) | |
739 | { | |
740 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
741 | struct pmbus_data *data = pmbus_update_device(dev); | |
742 | struct pmbus_sensor *sensor; | |
743 | ||
744 | sensor = &data->sensors[attr->index]; | |
745 | if (sensor->data < 0) | |
746 | return sensor->data; | |
747 | ||
f450c150 | 748 | return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor)); |
442aba78 GR |
749 | } |
750 | ||
751 | static ssize_t pmbus_set_sensor(struct device *dev, | |
752 | struct device_attribute *devattr, | |
753 | const char *buf, size_t count) | |
754 | { | |
755 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
756 | struct i2c_client *client = to_i2c_client(dev); | |
757 | struct pmbus_data *data = i2c_get_clientdata(client); | |
758 | struct pmbus_sensor *sensor = &data->sensors[attr->index]; | |
759 | ssize_t rv = count; | |
760 | long val = 0; | |
761 | int ret; | |
762 | u16 regval; | |
763 | ||
764 | if (strict_strtol(buf, 10, &val) < 0) | |
765 | return -EINVAL; | |
766 | ||
767 | mutex_lock(&data->update_lock); | |
768 | regval = pmbus_data2reg(data, sensor->class, val); | |
46243f3a | 769 | ret = _pmbus_write_word_data(client, sensor->page, sensor->reg, regval); |
442aba78 GR |
770 | if (ret < 0) |
771 | rv = ret; | |
772 | else | |
773 | data->sensors[attr->index].data = regval; | |
774 | mutex_unlock(&data->update_lock); | |
775 | return rv; | |
776 | } | |
777 | ||
778 | static ssize_t pmbus_show_label(struct device *dev, | |
779 | struct device_attribute *da, char *buf) | |
780 | { | |
781 | struct i2c_client *client = to_i2c_client(dev); | |
782 | struct pmbus_data *data = i2c_get_clientdata(client); | |
783 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
784 | ||
785 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
786 | data->labels[attr->index].label); | |
787 | } | |
788 | ||
789 | #define PMBUS_ADD_ATTR(data, _name, _idx, _mode, _type, _show, _set) \ | |
790 | do { \ | |
791 | struct sensor_device_attribute *a \ | |
792 | = &data->_type##s[data->num_##_type##s].attribute; \ | |
793 | BUG_ON(data->num_attributes >= data->max_attributes); \ | |
eec752b2 | 794 | sysfs_attr_init(&a->dev_attr.attr); \ |
442aba78 GR |
795 | a->dev_attr.attr.name = _name; \ |
796 | a->dev_attr.attr.mode = _mode; \ | |
797 | a->dev_attr.show = _show; \ | |
798 | a->dev_attr.store = _set; \ | |
799 | a->index = _idx; \ | |
800 | data->attributes[data->num_attributes] = &a->dev_attr.attr; \ | |
801 | data->num_attributes++; \ | |
802 | } while (0) | |
803 | ||
804 | #define PMBUS_ADD_GET_ATTR(data, _name, _type, _idx) \ | |
805 | PMBUS_ADD_ATTR(data, _name, _idx, S_IRUGO, _type, \ | |
806 | pmbus_show_##_type, NULL) | |
807 | ||
808 | #define PMBUS_ADD_SET_ATTR(data, _name, _type, _idx) \ | |
809 | PMBUS_ADD_ATTR(data, _name, _idx, S_IWUSR | S_IRUGO, _type, \ | |
810 | pmbus_show_##_type, pmbus_set_##_type) | |
811 | ||
812 | static void pmbus_add_boolean(struct pmbus_data *data, | |
813 | const char *name, const char *type, int seq, | |
814 | int idx) | |
815 | { | |
816 | struct pmbus_boolean *boolean; | |
817 | ||
818 | BUG_ON(data->num_booleans >= data->max_booleans); | |
819 | ||
820 | boolean = &data->booleans[data->num_booleans]; | |
821 | ||
822 | snprintf(boolean->name, sizeof(boolean->name), "%s%d_%s", | |
823 | name, seq, type); | |
824 | PMBUS_ADD_GET_ATTR(data, boolean->name, boolean, idx); | |
825 | data->num_booleans++; | |
826 | } | |
827 | ||
828 | static void pmbus_add_boolean_reg(struct pmbus_data *data, | |
829 | const char *name, const char *type, | |
830 | int seq, int reg, int bit) | |
831 | { | |
832 | pmbus_add_boolean(data, name, type, seq, (reg << 8) | bit); | |
833 | } | |
834 | ||
835 | static void pmbus_add_boolean_cmp(struct pmbus_data *data, | |
836 | const char *name, const char *type, | |
837 | int seq, int i1, int i2, int reg, int mask) | |
838 | { | |
839 | pmbus_add_boolean(data, name, type, seq, | |
840 | (i1 << 24) | (i2 << 16) | (reg << 8) | mask); | |
841 | } | |
842 | ||
843 | static void pmbus_add_sensor(struct pmbus_data *data, | |
844 | const char *name, const char *type, int seq, | |
845 | int page, int reg, enum pmbus_sensor_classes class, | |
3506999e | 846 | bool update, bool readonly) |
442aba78 GR |
847 | { |
848 | struct pmbus_sensor *sensor; | |
849 | ||
850 | BUG_ON(data->num_sensors >= data->max_sensors); | |
851 | ||
852 | sensor = &data->sensors[data->num_sensors]; | |
853 | snprintf(sensor->name, sizeof(sensor->name), "%s%d_%s", | |
854 | name, seq, type); | |
855 | sensor->page = page; | |
856 | sensor->reg = reg; | |
857 | sensor->class = class; | |
858 | sensor->update = update; | |
3506999e | 859 | if (readonly) |
442aba78 GR |
860 | PMBUS_ADD_GET_ATTR(data, sensor->name, sensor, |
861 | data->num_sensors); | |
862 | else | |
863 | PMBUS_ADD_SET_ATTR(data, sensor->name, sensor, | |
864 | data->num_sensors); | |
865 | data->num_sensors++; | |
866 | } | |
867 | ||
868 | static void pmbus_add_label(struct pmbus_data *data, | |
869 | const char *name, int seq, | |
870 | const char *lstring, int index) | |
871 | { | |
872 | struct pmbus_label *label; | |
873 | ||
874 | BUG_ON(data->num_labels >= data->max_labels); | |
875 | ||
876 | label = &data->labels[data->num_labels]; | |
877 | snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); | |
878 | if (!index) | |
879 | strncpy(label->label, lstring, sizeof(label->label) - 1); | |
880 | else | |
881 | snprintf(label->label, sizeof(label->label), "%s%d", lstring, | |
882 | index); | |
883 | ||
884 | PMBUS_ADD_GET_ATTR(data, label->name, label, data->num_labels); | |
885 | data->num_labels++; | |
886 | } | |
887 | ||
442aba78 GR |
888 | /* |
889 | * Determine maximum number of sensors, booleans, and labels. | |
890 | * To keep things simple, only make a rough high estimate. | |
891 | */ | |
892 | static void pmbus_find_max_attr(struct i2c_client *client, | |
893 | struct pmbus_data *data) | |
894 | { | |
895 | const struct pmbus_driver_info *info = data->info; | |
896 | int page, max_sensors, max_booleans, max_labels; | |
897 | ||
898 | max_sensors = PMBUS_MAX_INPUT_SENSORS; | |
899 | max_booleans = PMBUS_MAX_INPUT_BOOLEANS; | |
900 | max_labels = PMBUS_MAX_INPUT_LABELS; | |
901 | ||
902 | for (page = 0; page < info->pages; page++) { | |
903 | if (info->func[page] & PMBUS_HAVE_VOUT) { | |
904 | max_sensors += PMBUS_VOUT_SENSORS_PER_PAGE; | |
905 | max_booleans += PMBUS_VOUT_BOOLEANS_PER_PAGE; | |
906 | max_labels++; | |
907 | } | |
908 | if (info->func[page] & PMBUS_HAVE_IOUT) { | |
909 | max_sensors += PMBUS_IOUT_SENSORS_PER_PAGE; | |
910 | max_booleans += PMBUS_IOUT_BOOLEANS_PER_PAGE; | |
911 | max_labels++; | |
912 | } | |
913 | if (info->func[page] & PMBUS_HAVE_POUT) { | |
914 | max_sensors += PMBUS_POUT_SENSORS_PER_PAGE; | |
915 | max_booleans += PMBUS_POUT_BOOLEANS_PER_PAGE; | |
916 | max_labels++; | |
917 | } | |
918 | if (info->func[page] & PMBUS_HAVE_FAN12) { | |
954df676 GR |
919 | max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN; |
920 | max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN; | |
921 | } | |
922 | if (info->func[page] & PMBUS_HAVE_FAN34) { | |
923 | max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN; | |
924 | max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN; | |
442aba78 GR |
925 | } |
926 | if (info->func[page] & PMBUS_HAVE_TEMP) { | |
b49547a5 GR |
927 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; |
928 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; | |
929 | } | |
930 | if (info->func[page] & PMBUS_HAVE_TEMP2) { | |
931 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; | |
932 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; | |
933 | } | |
934 | if (info->func[page] & PMBUS_HAVE_TEMP3) { | |
935 | max_sensors += PMBUS_MAX_SENSORS_PER_TEMP; | |
936 | max_booleans += PMBUS_MAX_BOOLEANS_PER_TEMP; | |
442aba78 GR |
937 | } |
938 | } | |
939 | data->max_sensors = max_sensors; | |
940 | data->max_booleans = max_booleans; | |
941 | data->max_labels = max_labels; | |
942 | data->max_attributes = max_sensors + max_booleans + max_labels; | |
943 | } | |
944 | ||
945 | /* | |
946 | * Search for attributes. Allocate sensors, booleans, and labels as needed. | |
947 | */ | |
442aba78 | 948 | |
b4ce237b GR |
949 | /* |
950 | * The pmbus_limit_attr structure describes a single limit attribute | |
951 | * and its associated alarm attribute. | |
952 | */ | |
953 | struct pmbus_limit_attr { | |
954 | u8 reg; /* Limit register */ | |
955 | const char *attr; /* Attribute name */ | |
956 | const char *alarm; /* Alarm attribute name */ | |
957 | u32 sbit; /* Alarm attribute status bit */ | |
958 | }; | |
959 | ||
960 | /* | |
961 | * The pmbus_sensor_attr structure describes one sensor attribute. This | |
962 | * description includes a reference to the associated limit attributes. | |
963 | */ | |
964 | struct pmbus_sensor_attr { | |
965 | u8 reg; /* sensor register */ | |
966 | enum pmbus_sensor_classes class;/* sensor class */ | |
967 | const char *label; /* sensor label */ | |
968 | bool paged; /* true if paged sensor */ | |
969 | bool update; /* true if update needed */ | |
970 | bool compare; /* true if compare function needed */ | |
971 | u32 func; /* sensor mask */ | |
972 | u32 sfunc; /* sensor status mask */ | |
973 | int sbase; /* status base register */ | |
974 | u32 gbit; /* generic status bit */ | |
975 | const struct pmbus_limit_attr *limit;/* limit registers */ | |
976 | int nlimit; /* # of limit registers */ | |
977 | }; | |
978 | ||
979 | /* | |
980 | * Add a set of limit attributes and, if supported, the associated | |
981 | * alarm attributes. | |
982 | */ | |
983 | static bool pmbus_add_limit_attrs(struct i2c_client *client, | |
984 | struct pmbus_data *data, | |
985 | const struct pmbus_driver_info *info, | |
986 | const char *name, int index, int page, | |
987 | int cbase, | |
988 | const struct pmbus_sensor_attr *attr) | |
989 | { | |
990 | const struct pmbus_limit_attr *l = attr->limit; | |
991 | int nlimit = attr->nlimit; | |
992 | bool have_alarm = false; | |
993 | int i, cindex; | |
994 | ||
995 | for (i = 0; i < nlimit; i++) { | |
996 | if (pmbus_check_word_register(client, page, l->reg)) { | |
997 | cindex = data->num_sensors; | |
998 | pmbus_add_sensor(data, name, l->attr, index, page, | |
999 | l->reg, attr->class, attr->update, | |
1000 | false); | |
1001 | if (info->func[page] & attr->sfunc) { | |
1002 | if (attr->compare) { | |
1003 | pmbus_add_boolean_cmp(data, name, | |
1004 | l->alarm, index, | |
1005 | cbase, cindex, | |
1006 | attr->sbase + page, l->sbit); | |
1007 | } else { | |
1008 | pmbus_add_boolean_reg(data, name, | |
1009 | l->alarm, index, | |
1010 | attr->sbase + page, l->sbit); | |
1011 | } | |
442aba78 GR |
1012 | have_alarm = true; |
1013 | } | |
1014 | } | |
b4ce237b | 1015 | l++; |
442aba78 | 1016 | } |
b4ce237b GR |
1017 | return have_alarm; |
1018 | } | |
442aba78 | 1019 | |
b4ce237b GR |
1020 | static void pmbus_add_sensor_attrs_one(struct i2c_client *client, |
1021 | struct pmbus_data *data, | |
1022 | const struct pmbus_driver_info *info, | |
1023 | const char *name, | |
1024 | int index, int page, | |
1025 | const struct pmbus_sensor_attr *attr) | |
1026 | { | |
1027 | bool have_alarm; | |
1028 | int cbase = data->num_sensors; | |
1029 | ||
1030 | if (attr->label) | |
1031 | pmbus_add_label(data, name, index, attr->label, | |
1032 | attr->paged ? page + 1 : 0); | |
1033 | pmbus_add_sensor(data, name, "input", index, page, attr->reg, | |
1034 | attr->class, true, true); | |
1035 | if (attr->sfunc) { | |
1036 | have_alarm = pmbus_add_limit_attrs(client, data, info, name, | |
1037 | index, page, cbase, attr); | |
442aba78 GR |
1038 | /* |
1039 | * Add generic alarm attribute only if there are no individual | |
c6bfb767 GR |
1040 | * alarm attributes, if there is a global alarm bit, and if |
1041 | * the generic status register for this page is accessible. | |
442aba78 | 1042 | */ |
c6bfb767 GR |
1043 | if (!have_alarm && attr->gbit && |
1044 | pmbus_check_byte_register(client, page, PMBUS_STATUS_BYTE)) | |
b4ce237b | 1045 | pmbus_add_boolean_reg(data, name, "alarm", index, |
442aba78 | 1046 | PB_STATUS_BASE + page, |
b4ce237b | 1047 | attr->gbit); |
442aba78 | 1048 | } |
b4ce237b | 1049 | } |
442aba78 | 1050 | |
b4ce237b GR |
1051 | static void pmbus_add_sensor_attrs(struct i2c_client *client, |
1052 | struct pmbus_data *data, | |
1053 | const char *name, | |
1054 | const struct pmbus_sensor_attr *attrs, | |
1055 | int nattrs) | |
1056 | { | |
1057 | const struct pmbus_driver_info *info = data->info; | |
1058 | int index, i; | |
442aba78 | 1059 | |
b4ce237b GR |
1060 | index = 1; |
1061 | for (i = 0; i < nattrs; i++) { | |
1062 | int page, pages; | |
1063 | ||
1064 | pages = attrs->paged ? info->pages : 1; | |
1065 | for (page = 0; page < pages; page++) { | |
1066 | if (!(info->func[page] & attrs->func)) | |
1067 | continue; | |
1068 | pmbus_add_sensor_attrs_one(client, data, info, name, | |
1069 | index, page, attrs); | |
1070 | index++; | |
442aba78 | 1071 | } |
b4ce237b | 1072 | attrs++; |
442aba78 | 1073 | } |
b4ce237b | 1074 | } |
442aba78 | 1075 | |
b4ce237b GR |
1076 | static const struct pmbus_limit_attr vin_limit_attrs[] = { |
1077 | { | |
1078 | .reg = PMBUS_VIN_UV_WARN_LIMIT, | |
1079 | .attr = "min", | |
1080 | .alarm = "min_alarm", | |
1081 | .sbit = PB_VOLTAGE_UV_WARNING, | |
1082 | }, { | |
1083 | .reg = PMBUS_VIN_UV_FAULT_LIMIT, | |
1084 | .attr = "lcrit", | |
1085 | .alarm = "lcrit_alarm", | |
1086 | .sbit = PB_VOLTAGE_UV_FAULT, | |
1087 | }, { | |
1088 | .reg = PMBUS_VIN_OV_WARN_LIMIT, | |
1089 | .attr = "max", | |
1090 | .alarm = "max_alarm", | |
1091 | .sbit = PB_VOLTAGE_OV_WARNING, | |
1092 | }, { | |
1093 | .reg = PMBUS_VIN_OV_FAULT_LIMIT, | |
1094 | .attr = "crit", | |
1095 | .alarm = "crit_alarm", | |
1096 | .sbit = PB_VOLTAGE_OV_FAULT, | |
1097 | }, | |
1098 | }; | |
1099 | ||
1100 | static const struct pmbus_limit_attr vout_limit_attrs[] = { | |
1101 | { | |
1102 | .reg = PMBUS_VOUT_UV_WARN_LIMIT, | |
1103 | .attr = "min", | |
1104 | .alarm = "min_alarm", | |
1105 | .sbit = PB_VOLTAGE_UV_WARNING, | |
1106 | }, { | |
1107 | .reg = PMBUS_VOUT_UV_FAULT_LIMIT, | |
1108 | .attr = "lcrit", | |
1109 | .alarm = "lcrit_alarm", | |
1110 | .sbit = PB_VOLTAGE_UV_FAULT, | |
1111 | }, { | |
1112 | .reg = PMBUS_VOUT_OV_WARN_LIMIT, | |
1113 | .attr = "max", | |
1114 | .alarm = "max_alarm", | |
1115 | .sbit = PB_VOLTAGE_OV_WARNING, | |
1116 | }, { | |
1117 | .reg = PMBUS_VOUT_OV_FAULT_LIMIT, | |
1118 | .attr = "crit", | |
1119 | .alarm = "crit_alarm", | |
1120 | .sbit = PB_VOLTAGE_OV_FAULT, | |
442aba78 | 1121 | } |
b4ce237b | 1122 | }; |
442aba78 | 1123 | |
b4ce237b GR |
1124 | static const struct pmbus_sensor_attr voltage_attributes[] = { |
1125 | { | |
1126 | .reg = PMBUS_READ_VIN, | |
1127 | .class = PSC_VOLTAGE_IN, | |
1128 | .label = "vin", | |
1129 | .func = PMBUS_HAVE_VIN, | |
1130 | .sfunc = PMBUS_HAVE_STATUS_INPUT, | |
1131 | .sbase = PB_STATUS_INPUT_BASE, | |
1132 | .gbit = PB_STATUS_VIN_UV, | |
1133 | .limit = vin_limit_attrs, | |
1134 | .nlimit = ARRAY_SIZE(vin_limit_attrs), | |
1135 | }, { | |
1136 | .reg = PMBUS_READ_VCAP, | |
1137 | .class = PSC_VOLTAGE_IN, | |
1138 | .label = "vcap", | |
1139 | .func = PMBUS_HAVE_VCAP, | |
1140 | }, { | |
1141 | .reg = PMBUS_READ_VOUT, | |
1142 | .class = PSC_VOLTAGE_OUT, | |
1143 | .label = "vout", | |
1144 | .paged = true, | |
1145 | .func = PMBUS_HAVE_VOUT, | |
1146 | .sfunc = PMBUS_HAVE_STATUS_VOUT, | |
1147 | .sbase = PB_STATUS_VOUT_BASE, | |
1148 | .gbit = PB_STATUS_VOUT_OV, | |
1149 | .limit = vout_limit_attrs, | |
1150 | .nlimit = ARRAY_SIZE(vout_limit_attrs), | |
442aba78 | 1151 | } |
b4ce237b | 1152 | }; |
442aba78 | 1153 | |
b4ce237b GR |
1154 | /* Current attributes */ |
1155 | ||
1156 | static const struct pmbus_limit_attr iin_limit_attrs[] = { | |
1157 | { | |
1158 | .reg = PMBUS_IIN_OC_WARN_LIMIT, | |
1159 | .attr = "max", | |
1160 | .alarm = "max_alarm", | |
1161 | .sbit = PB_IIN_OC_WARNING, | |
1162 | }, { | |
1163 | .reg = PMBUS_IIN_OC_FAULT_LIMIT, | |
1164 | .attr = "crit", | |
1165 | .alarm = "crit_alarm", | |
1166 | .sbit = PB_IIN_OC_FAULT, | |
1167 | } | |
1168 | }; | |
442aba78 | 1169 | |
b4ce237b GR |
1170 | static const struct pmbus_limit_attr iout_limit_attrs[] = { |
1171 | { | |
1172 | .reg = PMBUS_IOUT_OC_WARN_LIMIT, | |
1173 | .attr = "max", | |
1174 | .alarm = "max_alarm", | |
1175 | .sbit = PB_IOUT_OC_WARNING, | |
1176 | }, { | |
1177 | .reg = PMBUS_IOUT_UC_FAULT_LIMIT, | |
1178 | .attr = "lcrit", | |
1179 | .alarm = "lcrit_alarm", | |
1180 | .sbit = PB_IOUT_UC_FAULT, | |
1181 | }, { | |
1182 | .reg = PMBUS_IOUT_OC_FAULT_LIMIT, | |
1183 | .attr = "crit", | |
1184 | .alarm = "crit_alarm", | |
1185 | .sbit = PB_IOUT_OC_FAULT, | |
1186 | } | |
1187 | }; | |
442aba78 | 1188 | |
b4ce237b GR |
1189 | static const struct pmbus_sensor_attr current_attributes[] = { |
1190 | { | |
1191 | .reg = PMBUS_READ_IIN, | |
1192 | .class = PSC_CURRENT_IN, | |
1193 | .label = "iin", | |
1194 | .func = PMBUS_HAVE_IIN, | |
1195 | .sfunc = PMBUS_HAVE_STATUS_INPUT, | |
1196 | .sbase = PB_STATUS_INPUT_BASE, | |
1197 | .limit = iin_limit_attrs, | |
1198 | .nlimit = ARRAY_SIZE(iin_limit_attrs), | |
1199 | }, { | |
1200 | .reg = PMBUS_READ_IOUT, | |
1201 | .class = PSC_CURRENT_OUT, | |
1202 | .label = "iout", | |
1203 | .paged = true, | |
1204 | .func = PMBUS_HAVE_IOUT, | |
1205 | .sfunc = PMBUS_HAVE_STATUS_IOUT, | |
1206 | .sbase = PB_STATUS_IOUT_BASE, | |
1207 | .gbit = PB_STATUS_IOUT_OC, | |
1208 | .limit = iout_limit_attrs, | |
1209 | .nlimit = ARRAY_SIZE(iout_limit_attrs), | |
442aba78 | 1210 | } |
b4ce237b | 1211 | }; |
442aba78 | 1212 | |
b4ce237b | 1213 | /* Power attributes */ |
442aba78 | 1214 | |
b4ce237b GR |
1215 | static const struct pmbus_limit_attr pin_limit_attrs[] = { |
1216 | { | |
1217 | .reg = PMBUS_PIN_OP_WARN_LIMIT, | |
1218 | .attr = "max", | |
1219 | .alarm = "alarm", | |
1220 | .sbit = PB_PIN_OP_WARNING, | |
1221 | } | |
1222 | }; | |
442aba78 | 1223 | |
b4ce237b GR |
1224 | static const struct pmbus_limit_attr pout_limit_attrs[] = { |
1225 | { | |
1226 | .reg = PMBUS_POUT_MAX, | |
1227 | .attr = "cap", | |
1228 | .alarm = "cap_alarm", | |
1229 | .sbit = PB_POWER_LIMITING, | |
1230 | }, { | |
1231 | .reg = PMBUS_POUT_OP_WARN_LIMIT, | |
1232 | .attr = "max", | |
1233 | .alarm = "max_alarm", | |
1234 | .sbit = PB_POUT_OP_WARNING, | |
1235 | }, { | |
1236 | .reg = PMBUS_POUT_OP_FAULT_LIMIT, | |
1237 | .attr = "crit", | |
1238 | .alarm = "crit_alarm", | |
1239 | .sbit = PB_POUT_OP_FAULT, | |
1240 | } | |
1241 | }; | |
b49547a5 | 1242 | |
b4ce237b GR |
1243 | static const struct pmbus_sensor_attr power_attributes[] = { |
1244 | { | |
1245 | .reg = PMBUS_READ_PIN, | |
1246 | .class = PSC_POWER, | |
1247 | .label = "pin", | |
1248 | .func = PMBUS_HAVE_PIN, | |
1249 | .sfunc = PMBUS_HAVE_STATUS_INPUT, | |
1250 | .sbase = PB_STATUS_INPUT_BASE, | |
1251 | .limit = pin_limit_attrs, | |
1252 | .nlimit = ARRAY_SIZE(pin_limit_attrs), | |
1253 | }, { | |
1254 | .reg = PMBUS_READ_POUT, | |
1255 | .class = PSC_POWER, | |
1256 | .label = "pout", | |
1257 | .paged = true, | |
1258 | .func = PMBUS_HAVE_POUT, | |
1259 | .sfunc = PMBUS_HAVE_STATUS_IOUT, | |
1260 | .sbase = PB_STATUS_IOUT_BASE, | |
1261 | .limit = pout_limit_attrs, | |
1262 | .nlimit = ARRAY_SIZE(pout_limit_attrs), | |
1263 | } | |
1264 | }; | |
442aba78 | 1265 | |
b4ce237b GR |
1266 | /* Temperature atributes */ |
1267 | ||
1268 | static const struct pmbus_limit_attr temp_limit_attrs[] = { | |
1269 | { | |
1270 | .reg = PMBUS_UT_WARN_LIMIT, | |
1271 | .attr = "min", | |
1272 | .alarm = "min_alarm", | |
1273 | .sbit = PB_TEMP_UT_WARNING, | |
1274 | }, { | |
1275 | .reg = PMBUS_UT_FAULT_LIMIT, | |
1276 | .attr = "lcrit", | |
1277 | .alarm = "lcrit_alarm", | |
1278 | .sbit = PB_TEMP_UT_FAULT, | |
1279 | }, { | |
1280 | .reg = PMBUS_OT_WARN_LIMIT, | |
1281 | .attr = "max", | |
1282 | .alarm = "max_alarm", | |
1283 | .sbit = PB_TEMP_OT_WARNING, | |
1284 | }, { | |
1285 | .reg = PMBUS_OT_FAULT_LIMIT, | |
1286 | .attr = "crit", | |
1287 | .alarm = "crit_alarm", | |
1288 | .sbit = PB_TEMP_OT_FAULT, | |
1289 | } | |
1290 | }; | |
442aba78 | 1291 | |
b4ce237b GR |
1292 | static const struct pmbus_sensor_attr temp_attributes[] = { |
1293 | { | |
1294 | .reg = PMBUS_READ_TEMPERATURE_1, | |
1295 | .class = PSC_TEMPERATURE, | |
1296 | .paged = true, | |
1297 | .update = true, | |
1298 | .compare = true, | |
1299 | .func = PMBUS_HAVE_TEMP, | |
1300 | .sfunc = PMBUS_HAVE_STATUS_TEMP, | |
1301 | .sbase = PB_STATUS_TEMP_BASE, | |
1302 | .gbit = PB_STATUS_TEMPERATURE, | |
1303 | .limit = temp_limit_attrs, | |
1304 | .nlimit = ARRAY_SIZE(temp_limit_attrs), | |
1305 | }, { | |
1306 | .reg = PMBUS_READ_TEMPERATURE_2, | |
1307 | .class = PSC_TEMPERATURE, | |
1308 | .paged = true, | |
1309 | .update = true, | |
1310 | .compare = true, | |
1311 | .func = PMBUS_HAVE_TEMP2, | |
1312 | .sfunc = PMBUS_HAVE_STATUS_TEMP, | |
1313 | .sbase = PB_STATUS_TEMP_BASE, | |
1314 | .gbit = PB_STATUS_TEMPERATURE, | |
1315 | .limit = temp_limit_attrs, | |
1316 | .nlimit = ARRAY_SIZE(temp_limit_attrs), | |
1317 | }, { | |
1318 | .reg = PMBUS_READ_TEMPERATURE_3, | |
1319 | .class = PSC_TEMPERATURE, | |
1320 | .paged = true, | |
1321 | .update = true, | |
1322 | .compare = true, | |
1323 | .func = PMBUS_HAVE_TEMP3, | |
1324 | .sfunc = PMBUS_HAVE_STATUS_TEMP, | |
1325 | .sbase = PB_STATUS_TEMP_BASE, | |
1326 | .gbit = PB_STATUS_TEMPERATURE, | |
1327 | .limit = temp_limit_attrs, | |
1328 | .nlimit = ARRAY_SIZE(temp_limit_attrs), | |
442aba78 | 1329 | } |
b4ce237b GR |
1330 | }; |
1331 | ||
1332 | static const int pmbus_fan_registers[] = { | |
1333 | PMBUS_READ_FAN_SPEED_1, | |
1334 | PMBUS_READ_FAN_SPEED_2, | |
1335 | PMBUS_READ_FAN_SPEED_3, | |
1336 | PMBUS_READ_FAN_SPEED_4 | |
1337 | }; | |
1338 | ||
1339 | static const int pmbus_fan_config_registers[] = { | |
1340 | PMBUS_FAN_CONFIG_12, | |
1341 | PMBUS_FAN_CONFIG_12, | |
1342 | PMBUS_FAN_CONFIG_34, | |
1343 | PMBUS_FAN_CONFIG_34 | |
1344 | }; | |
1345 | ||
1346 | static const int pmbus_fan_status_registers[] = { | |
1347 | PMBUS_STATUS_FAN_12, | |
1348 | PMBUS_STATUS_FAN_12, | |
1349 | PMBUS_STATUS_FAN_34, | |
1350 | PMBUS_STATUS_FAN_34 | |
1351 | }; | |
1352 | ||
1353 | static const u32 pmbus_fan_flags[] = { | |
1354 | PMBUS_HAVE_FAN12, | |
1355 | PMBUS_HAVE_FAN12, | |
1356 | PMBUS_HAVE_FAN34, | |
1357 | PMBUS_HAVE_FAN34 | |
1358 | }; | |
1359 | ||
1360 | static const u32 pmbus_fan_status_flags[] = { | |
1361 | PMBUS_HAVE_STATUS_FAN12, | |
1362 | PMBUS_HAVE_STATUS_FAN12, | |
1363 | PMBUS_HAVE_STATUS_FAN34, | |
1364 | PMBUS_HAVE_STATUS_FAN34 | |
1365 | }; | |
1366 | ||
1367 | /* Fans */ | |
1368 | static void pmbus_add_fan_attributes(struct i2c_client *client, | |
1369 | struct pmbus_data *data) | |
1370 | { | |
1371 | const struct pmbus_driver_info *info = data->info; | |
1372 | int index = 1; | |
1373 | int page; | |
442aba78 | 1374 | |
442aba78 | 1375 | for (page = 0; page < info->pages; page++) { |
954df676 | 1376 | int f; |
442aba78 | 1377 | |
954df676 | 1378 | for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) { |
442aba78 GR |
1379 | int regval; |
1380 | ||
954df676 GR |
1381 | if (!(info->func[page] & pmbus_fan_flags[f])) |
1382 | break; | |
1383 | ||
442aba78 | 1384 | if (!pmbus_check_word_register(client, page, |
6586b14c | 1385 | pmbus_fan_registers[f])) |
442aba78 GR |
1386 | break; |
1387 | ||
1388 | /* | |
1389 | * Skip fan if not installed. | |
1390 | * Each fan configuration register covers multiple fans, | |
1391 | * so we have to do some magic. | |
1392 | */ | |
6586b14c | 1393 | regval = _pmbus_read_byte_data(client, page, |
442aba78 GR |
1394 | pmbus_fan_config_registers[f]); |
1395 | if (regval < 0 || | |
1396 | (!(regval & (PB_FAN_1_INSTALLED >> ((f & 1) * 4))))) | |
1397 | continue; | |
1398 | ||
b4ce237b | 1399 | pmbus_add_sensor(data, "fan", "input", index, page, |
3506999e GR |
1400 | pmbus_fan_registers[f], PSC_FAN, true, |
1401 | true); | |
442aba78 GR |
1402 | |
1403 | /* | |
1404 | * Each fan status register covers multiple fans, | |
1405 | * so we have to do some magic. | |
1406 | */ | |
954df676 GR |
1407 | if ((info->func[page] & pmbus_fan_status_flags[f]) && |
1408 | pmbus_check_byte_register(client, | |
1409 | page, pmbus_fan_status_registers[f])) { | |
442aba78 GR |
1410 | int base; |
1411 | ||
1412 | if (f > 1) /* fan 3, 4 */ | |
954df676 | 1413 | base = PB_STATUS_FAN34_BASE + page; |
442aba78 GR |
1414 | else |
1415 | base = PB_STATUS_FAN_BASE + page; | |
1416 | pmbus_add_boolean_reg(data, "fan", "alarm", | |
b4ce237b | 1417 | index, base, |
442aba78 GR |
1418 | PB_FAN_FAN1_WARNING >> (f & 1)); |
1419 | pmbus_add_boolean_reg(data, "fan", "fault", | |
b4ce237b | 1420 | index, base, |
442aba78 GR |
1421 | PB_FAN_FAN1_FAULT >> (f & 1)); |
1422 | } | |
b4ce237b | 1423 | index++; |
442aba78 GR |
1424 | } |
1425 | } | |
1426 | } | |
1427 | ||
b4ce237b GR |
1428 | static void pmbus_find_attributes(struct i2c_client *client, |
1429 | struct pmbus_data *data) | |
1430 | { | |
1431 | /* Voltage sensors */ | |
1432 | pmbus_add_sensor_attrs(client, data, "in", voltage_attributes, | |
1433 | ARRAY_SIZE(voltage_attributes)); | |
1434 | ||
1435 | /* Current sensors */ | |
1436 | pmbus_add_sensor_attrs(client, data, "curr", current_attributes, | |
1437 | ARRAY_SIZE(current_attributes)); | |
1438 | ||
1439 | /* Power sensors */ | |
1440 | pmbus_add_sensor_attrs(client, data, "power", power_attributes, | |
1441 | ARRAY_SIZE(power_attributes)); | |
1442 | ||
1443 | /* Temperature sensors */ | |
1444 | pmbus_add_sensor_attrs(client, data, "temp", temp_attributes, | |
1445 | ARRAY_SIZE(temp_attributes)); | |
1446 | ||
1447 | /* Fans */ | |
1448 | pmbus_add_fan_attributes(client, data); | |
1449 | } | |
1450 | ||
442aba78 GR |
1451 | /* |
1452 | * Identify chip parameters. | |
1453 | * This function is called for all chips. | |
1454 | */ | |
1455 | static int pmbus_identify_common(struct i2c_client *client, | |
1456 | struct pmbus_data *data) | |
1457 | { | |
83274c68 | 1458 | int vout_mode = -1, exponent; |
442aba78 | 1459 | |
83274c68 GR |
1460 | if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) |
1461 | vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); | |
1462 | if (vout_mode >= 0 && vout_mode != 0xff) { | |
442aba78 GR |
1463 | /* |
1464 | * Not all chips support the VOUT_MODE command, | |
1465 | * so a failure to read it is not an error. | |
1466 | */ | |
1467 | switch (vout_mode >> 5) { | |
1468 | case 0: /* linear mode */ | |
1061d851 | 1469 | if (data->info->format[PSC_VOLTAGE_OUT] != linear) |
442aba78 GR |
1470 | return -ENODEV; |
1471 | ||
1472 | exponent = vout_mode & 0x1f; | |
1473 | /* and sign-extend it */ | |
1474 | if (exponent & 0x10) | |
1475 | exponent |= ~0x1f; | |
1476 | data->exponent = exponent; | |
1477 | break; | |
1061d851 GR |
1478 | case 1: /* VID mode */ |
1479 | if (data->info->format[PSC_VOLTAGE_OUT] != vid) | |
1480 | return -ENODEV; | |
1481 | break; | |
442aba78 | 1482 | case 2: /* direct mode */ |
1061d851 | 1483 | if (data->info->format[PSC_VOLTAGE_OUT] != direct) |
442aba78 GR |
1484 | return -ENODEV; |
1485 | break; | |
1486 | default: | |
1487 | return -ENODEV; | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | /* Determine maximum number of sensors, booleans, and labels */ | |
1492 | pmbus_find_max_attr(client, data); | |
1493 | pmbus_clear_fault_page(client, 0); | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, | |
1498 | struct pmbus_driver_info *info) | |
1499 | { | |
1500 | const struct pmbus_platform_data *pdata = client->dev.platform_data; | |
1501 | struct pmbus_data *data; | |
1502 | int ret; | |
1503 | ||
1504 | if (!info) { | |
1505 | dev_err(&client->dev, "Missing chip information"); | |
1506 | return -ENODEV; | |
1507 | } | |
1508 | ||
1509 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE | |
1510 | | I2C_FUNC_SMBUS_BYTE_DATA | |
1511 | | I2C_FUNC_SMBUS_WORD_DATA)) | |
1512 | return -ENODEV; | |
1513 | ||
1514 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1515 | if (!data) { | |
1516 | dev_err(&client->dev, "No memory to allocate driver data\n"); | |
1517 | return -ENOMEM; | |
1518 | } | |
1519 | ||
1520 | i2c_set_clientdata(client, data); | |
1521 | mutex_init(&data->update_lock); | |
1522 | ||
7f2c0662 GR |
1523 | /* Bail out if PMBus status register does not exist. */ |
1524 | if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0) { | |
1525 | dev_err(&client->dev, "PMBus status register not found\n"); | |
442aba78 GR |
1526 | ret = -ENODEV; |
1527 | goto out_data; | |
1528 | } | |
1529 | ||
1530 | if (pdata) | |
1531 | data->flags = pdata->flags; | |
1532 | data->info = info; | |
1533 | ||
1534 | pmbus_clear_faults(client); | |
1535 | ||
1536 | if (info->identify) { | |
1537 | ret = (*info->identify)(client, info); | |
1538 | if (ret < 0) { | |
1539 | dev_err(&client->dev, "Chip identification failed\n"); | |
1540 | goto out_data; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | if (info->pages <= 0 || info->pages > PMBUS_PAGES) { | |
1545 | dev_err(&client->dev, "Bad number of PMBus pages: %d\n", | |
1546 | info->pages); | |
1547 | ret = -EINVAL; | |
1548 | goto out_data; | |
1549 | } | |
442aba78 GR |
1550 | |
1551 | ret = pmbus_identify_common(client, data); | |
1552 | if (ret < 0) { | |
1553 | dev_err(&client->dev, "Failed to identify chip capabilities\n"); | |
1554 | goto out_data; | |
1555 | } | |
1556 | ||
1557 | ret = -ENOMEM; | |
1558 | data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors, | |
1559 | GFP_KERNEL); | |
1560 | if (!data->sensors) { | |
1561 | dev_err(&client->dev, "No memory to allocate sensor data\n"); | |
1562 | goto out_data; | |
1563 | } | |
1564 | ||
1565 | data->booleans = kzalloc(sizeof(struct pmbus_boolean) | |
1566 | * data->max_booleans, GFP_KERNEL); | |
1567 | if (!data->booleans) { | |
1568 | dev_err(&client->dev, "No memory to allocate boolean data\n"); | |
1569 | goto out_sensors; | |
1570 | } | |
1571 | ||
1572 | data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels, | |
1573 | GFP_KERNEL); | |
1574 | if (!data->labels) { | |
1575 | dev_err(&client->dev, "No memory to allocate label data\n"); | |
1576 | goto out_booleans; | |
1577 | } | |
1578 | ||
1579 | data->attributes = kzalloc(sizeof(struct attribute *) | |
1580 | * data->max_attributes, GFP_KERNEL); | |
1581 | if (!data->attributes) { | |
1582 | dev_err(&client->dev, "No memory to allocate attribute data\n"); | |
1583 | goto out_labels; | |
1584 | } | |
1585 | ||
1586 | pmbus_find_attributes(client, data); | |
1587 | ||
1588 | /* | |
1589 | * If there are no attributes, something is wrong. | |
1590 | * Bail out instead of trying to register nothing. | |
1591 | */ | |
1592 | if (!data->num_attributes) { | |
1593 | dev_err(&client->dev, "No attributes found\n"); | |
1594 | ret = -ENODEV; | |
1595 | goto out_attributes; | |
1596 | } | |
1597 | ||
1598 | /* Register sysfs hooks */ | |
1599 | data->group.attrs = data->attributes; | |
1600 | ret = sysfs_create_group(&client->dev.kobj, &data->group); | |
1601 | if (ret) { | |
1602 | dev_err(&client->dev, "Failed to create sysfs entries\n"); | |
1603 | goto out_attributes; | |
1604 | } | |
1605 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
1606 | if (IS_ERR(data->hwmon_dev)) { | |
1607 | ret = PTR_ERR(data->hwmon_dev); | |
1608 | dev_err(&client->dev, "Failed to register hwmon device\n"); | |
1609 | goto out_hwmon_device_register; | |
1610 | } | |
1611 | return 0; | |
1612 | ||
1613 | out_hwmon_device_register: | |
1614 | sysfs_remove_group(&client->dev.kobj, &data->group); | |
1615 | out_attributes: | |
1616 | kfree(data->attributes); | |
1617 | out_labels: | |
1618 | kfree(data->labels); | |
1619 | out_booleans: | |
1620 | kfree(data->booleans); | |
1621 | out_sensors: | |
1622 | kfree(data->sensors); | |
1623 | out_data: | |
1624 | kfree(data); | |
1625 | return ret; | |
1626 | } | |
1627 | EXPORT_SYMBOL_GPL(pmbus_do_probe); | |
1628 | ||
1629 | int pmbus_do_remove(struct i2c_client *client) | |
1630 | { | |
1631 | struct pmbus_data *data = i2c_get_clientdata(client); | |
1632 | hwmon_device_unregister(data->hwmon_dev); | |
1633 | sysfs_remove_group(&client->dev.kobj, &data->group); | |
1634 | kfree(data->attributes); | |
1635 | kfree(data->labels); | |
1636 | kfree(data->booleans); | |
1637 | kfree(data->sensors); | |
1638 | kfree(data); | |
1639 | return 0; | |
1640 | } | |
1641 | EXPORT_SYMBOL_GPL(pmbus_do_remove); | |
1642 | ||
1643 | MODULE_AUTHOR("Guenter Roeck"); | |
1644 | MODULE_DESCRIPTION("PMBus core driver"); | |
1645 | MODULE_LICENSE("GPL"); |