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Merge tag 'doc-4.8-fixes' of git://git.lwn.net/linux
[deliverable/linux.git] / drivers / hwmon / adm9240.c
1 /*
2 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 *
5 * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
6 * Philip Edelbrock <phil@netroedge.com>
7 * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
8 * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
9 * guidance from Jean Delvare
10 *
11 * Driver supports Analog Devices ADM9240
12 * Dallas Semiconductor DS1780
13 * National Semiconductor LM81
14 *
15 * ADM9240 is the reference, DS1780 and LM81 are register compatibles
16 *
17 * Voltage Six inputs are scaled by chip, VID also reported
18 * Temperature Chip temperature to 0.5'C, maximum and max_hysteris
19 * Fans 2 fans, low speed alarm, automatic fan clock divider
20 * Alarms 16-bit map of active alarms
21 * Analog Out 0..1250 mV output
22 *
23 * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
24 *
25 * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
26 *
27 * LM81 extended temp reading not implemented
28 *
29 * This program is free software; you can redistribute it and/or modify
30 * it under the terms of the GNU General Public License as published by
31 * the Free Software Foundation; either version 2 of the License, or
32 * (at your option) any later version.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * You should have received a copy of the GNU General Public License
40 * along with this program; if not, write to the Free Software
41 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
42 */
43
44 #include <linux/init.h>
45 #include <linux/module.h>
46 #include <linux/slab.h>
47 #include <linux/i2c.h>
48 #include <linux/hwmon-sysfs.h>
49 #include <linux/hwmon.h>
50 #include <linux/hwmon-vid.h>
51 #include <linux/err.h>
52 #include <linux/mutex.h>
53 #include <linux/jiffies.h>
54
55 /* Addresses to scan */
56 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
57 I2C_CLIENT_END };
58
59 enum chips { adm9240, ds1780, lm81 };
60
61 /* ADM9240 registers */
62 #define ADM9240_REG_MAN_ID 0x3e
63 #define ADM9240_REG_DIE_REV 0x3f
64 #define ADM9240_REG_CONFIG 0x40
65
66 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
67 #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
68 #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
69 #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
70 #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
71 #define ADM9240_REG_INT(nr) (0x41 + (nr))
72 #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
73 #define ADM9240_REG_TEMP 0x27
74 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
75 #define ADM9240_REG_ANALOG_OUT 0x19
76 #define ADM9240_REG_CHASSIS_CLEAR 0x46
77 #define ADM9240_REG_VID_FAN_DIV 0x47
78 #define ADM9240_REG_I2C_ADDR 0x48
79 #define ADM9240_REG_VID4 0x49
80 #define ADM9240_REG_TEMP_CONF 0x4b
81
82 /* generalised scaling with integer rounding */
83 static inline int SCALE(long val, int mul, int div)
84 {
85 if (val < 0)
86 return (val * mul - div / 2) / div;
87 else
88 return (val * mul + div / 2) / div;
89 }
90
91 /* adm9240 internally scales voltage measurements */
92 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
93
94 static inline unsigned int IN_FROM_REG(u8 reg, int n)
95 {
96 return SCALE(reg, nom_mv[n], 192);
97 }
98
99 static inline u8 IN_TO_REG(unsigned long val, int n)
100 {
101 return clamp_val(SCALE(val, 192, nom_mv[n]), 0, 255);
102 }
103
104 /* temperature range: -40..125, 127 disables temperature alarm */
105 static inline s8 TEMP_TO_REG(long val)
106 {
107 return clamp_val(SCALE(val, 1, 1000), -40, 127);
108 }
109
110 /* two fans, each with low fan speed limit */
111 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
112 {
113 if (!reg) /* error */
114 return -1;
115
116 if (reg == 255)
117 return 0;
118
119 return SCALE(1350000, 1, reg * div);
120 }
121
122 /* analog out 0..1250mV */
123 static inline u8 AOUT_TO_REG(unsigned long val)
124 {
125 return clamp_val(SCALE(val, 255, 1250), 0, 255);
126 }
127
128 static inline unsigned int AOUT_FROM_REG(u8 reg)
129 {
130 return SCALE(reg, 1250, 255);
131 }
132
133 /* per client data */
134 struct adm9240_data {
135 struct i2c_client *client;
136 struct mutex update_lock;
137 char valid;
138 unsigned long last_updated_measure;
139 unsigned long last_updated_config;
140
141 u8 in[6]; /* ro in0_input */
142 u8 in_max[6]; /* rw in0_max */
143 u8 in_min[6]; /* rw in0_min */
144 u8 fan[2]; /* ro fan1_input */
145 u8 fan_min[2]; /* rw fan1_min */
146 u8 fan_div[2]; /* rw fan1_div, read-only accessor */
147 s16 temp; /* ro temp1_input, 9-bit sign-extended */
148 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
149 u16 alarms; /* ro alarms */
150 u8 aout; /* rw aout_output */
151 u8 vid; /* ro vid */
152 u8 vrm; /* -- vrm set on startup, no accessor */
153 };
154
155 /* write new fan div, callers must hold data->update_lock */
156 static void adm9240_write_fan_div(struct i2c_client *client, int nr,
157 u8 fan_div)
158 {
159 u8 reg, old, shift = (nr + 2) * 2;
160
161 reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
162 old = (reg >> shift) & 3;
163 reg &= ~(3 << shift);
164 reg |= (fan_div << shift);
165 i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
166 dev_dbg(&client->dev,
167 "fan%d clock divider changed from %u to %u\n",
168 nr + 1, 1 << old, 1 << fan_div);
169 }
170
171 static struct adm9240_data *adm9240_update_device(struct device *dev)
172 {
173 struct adm9240_data *data = dev_get_drvdata(dev);
174 struct i2c_client *client = data->client;
175 int i;
176
177 mutex_lock(&data->update_lock);
178
179 /* minimum measurement cycle: 1.75 seconds */
180 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
181 || !data->valid) {
182
183 for (i = 0; i < 6; i++) { /* read voltages */
184 data->in[i] = i2c_smbus_read_byte_data(client,
185 ADM9240_REG_IN(i));
186 }
187 data->alarms = i2c_smbus_read_byte_data(client,
188 ADM9240_REG_INT(0)) |
189 i2c_smbus_read_byte_data(client,
190 ADM9240_REG_INT(1)) << 8;
191
192 /*
193 * read temperature: assume temperature changes less than
194 * 0.5'C per two measurement cycles thus ignore possible
195 * but unlikely aliasing error on lsb reading. --Grant
196 */
197 data->temp = ((i2c_smbus_read_byte_data(client,
198 ADM9240_REG_TEMP) << 8) |
199 i2c_smbus_read_byte_data(client,
200 ADM9240_REG_TEMP_CONF)) / 128;
201
202 for (i = 0; i < 2; i++) { /* read fans */
203 data->fan[i] = i2c_smbus_read_byte_data(client,
204 ADM9240_REG_FAN(i));
205
206 /* adjust fan clock divider on overflow */
207 if (data->valid && data->fan[i] == 255 &&
208 data->fan_div[i] < 3) {
209
210 adm9240_write_fan_div(client, i,
211 ++data->fan_div[i]);
212
213 /* adjust fan_min if active, but not to 0 */
214 if (data->fan_min[i] < 255 &&
215 data->fan_min[i] >= 2)
216 data->fan_min[i] /= 2;
217 }
218 }
219 data->last_updated_measure = jiffies;
220 }
221
222 /* minimum config reading cycle: 300 seconds */
223 if (time_after(jiffies, data->last_updated_config + (HZ * 300))
224 || !data->valid) {
225
226 for (i = 0; i < 6; i++) {
227 data->in_min[i] = i2c_smbus_read_byte_data(client,
228 ADM9240_REG_IN_MIN(i));
229 data->in_max[i] = i2c_smbus_read_byte_data(client,
230 ADM9240_REG_IN_MAX(i));
231 }
232 for (i = 0; i < 2; i++) {
233 data->fan_min[i] = i2c_smbus_read_byte_data(client,
234 ADM9240_REG_FAN_MIN(i));
235 }
236 data->temp_max[0] = i2c_smbus_read_byte_data(client,
237 ADM9240_REG_TEMP_MAX(0));
238 data->temp_max[1] = i2c_smbus_read_byte_data(client,
239 ADM9240_REG_TEMP_MAX(1));
240
241 /* read fan divs and 5-bit VID */
242 i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
243 data->fan_div[0] = (i >> 4) & 3;
244 data->fan_div[1] = (i >> 6) & 3;
245 data->vid = i & 0x0f;
246 data->vid |= (i2c_smbus_read_byte_data(client,
247 ADM9240_REG_VID4) & 1) << 4;
248 /* read analog out */
249 data->aout = i2c_smbus_read_byte_data(client,
250 ADM9240_REG_ANALOG_OUT);
251
252 data->last_updated_config = jiffies;
253 data->valid = 1;
254 }
255 mutex_unlock(&data->update_lock);
256 return data;
257 }
258
259 /*** sysfs accessors ***/
260
261 /* temperature */
262 static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
263 char *buf)
264 {
265 struct adm9240_data *data = adm9240_update_device(dev);
266 return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
267 }
268
269 static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
270 char *buf)
271 {
272 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
273 struct adm9240_data *data = adm9240_update_device(dev);
274 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
275 }
276
277 static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
278 const char *buf, size_t count)
279 {
280 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
281 struct adm9240_data *data = dev_get_drvdata(dev);
282 struct i2c_client *client = data->client;
283 long val;
284 int err;
285
286 err = kstrtol(buf, 10, &val);
287 if (err)
288 return err;
289
290 mutex_lock(&data->update_lock);
291 data->temp_max[attr->index] = TEMP_TO_REG(val);
292 i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
293 data->temp_max[attr->index]);
294 mutex_unlock(&data->update_lock);
295 return count;
296 }
297
298 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
299 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
300 show_max, set_max, 0);
301 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
302 show_max, set_max, 1);
303
304 /* voltage */
305 static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
306 char *buf)
307 {
308 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
309 struct adm9240_data *data = adm9240_update_device(dev);
310 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
311 attr->index));
312 }
313
314 static ssize_t show_in_min(struct device *dev,
315 struct device_attribute *devattr, char *buf)
316 {
317 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
318 struct adm9240_data *data = adm9240_update_device(dev);
319 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
320 attr->index));
321 }
322
323 static ssize_t show_in_max(struct device *dev,
324 struct device_attribute *devattr, char *buf)
325 {
326 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
327 struct adm9240_data *data = adm9240_update_device(dev);
328 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
329 attr->index));
330 }
331
332 static ssize_t set_in_min(struct device *dev,
333 struct device_attribute *devattr,
334 const char *buf, size_t count)
335 {
336 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
337 struct adm9240_data *data = dev_get_drvdata(dev);
338 struct i2c_client *client = data->client;
339 unsigned long val;
340 int err;
341
342 err = kstrtoul(buf, 10, &val);
343 if (err)
344 return err;
345
346 mutex_lock(&data->update_lock);
347 data->in_min[attr->index] = IN_TO_REG(val, attr->index);
348 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
349 data->in_min[attr->index]);
350 mutex_unlock(&data->update_lock);
351 return count;
352 }
353
354 static ssize_t set_in_max(struct device *dev,
355 struct device_attribute *devattr,
356 const char *buf, size_t count)
357 {
358 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
359 struct adm9240_data *data = dev_get_drvdata(dev);
360 struct i2c_client *client = data->client;
361 unsigned long val;
362 int err;
363
364 err = kstrtoul(buf, 10, &val);
365 if (err)
366 return err;
367
368 mutex_lock(&data->update_lock);
369 data->in_max[attr->index] = IN_TO_REG(val, attr->index);
370 i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
371 data->in_max[attr->index]);
372 mutex_unlock(&data->update_lock);
373 return count;
374 }
375
376 #define vin(nr) \
377 static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
378 show_in, NULL, nr); \
379 static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
380 show_in_min, set_in_min, nr); \
381 static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
382 show_in_max, set_in_max, nr);
383
384 vin(0);
385 vin(1);
386 vin(2);
387 vin(3);
388 vin(4);
389 vin(5);
390
391 /* fans */
392 static ssize_t show_fan(struct device *dev,
393 struct device_attribute *devattr, char *buf)
394 {
395 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
396 struct adm9240_data *data = adm9240_update_device(dev);
397 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
398 1 << data->fan_div[attr->index]));
399 }
400
401 static ssize_t show_fan_min(struct device *dev,
402 struct device_attribute *devattr, char *buf)
403 {
404 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
405 struct adm9240_data *data = adm9240_update_device(dev);
406 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
407 1 << data->fan_div[attr->index]));
408 }
409
410 static ssize_t show_fan_div(struct device *dev,
411 struct device_attribute *devattr, char *buf)
412 {
413 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
414 struct adm9240_data *data = adm9240_update_device(dev);
415 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
416 }
417
418 /*
419 * set fan speed low limit:
420 *
421 * - value is zero: disable fan speed low limit alarm
422 *
423 * - value is below fan speed measurement range: enable fan speed low
424 * limit alarm to be asserted while fan speed too slow to measure
425 *
426 * - otherwise: select fan clock divider to suit fan speed low limit,
427 * measurement code may adjust registers to ensure fan speed reading
428 */
429 static ssize_t set_fan_min(struct device *dev,
430 struct device_attribute *devattr,
431 const char *buf, size_t count)
432 {
433 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
434 struct adm9240_data *data = dev_get_drvdata(dev);
435 struct i2c_client *client = data->client;
436 int nr = attr->index;
437 u8 new_div;
438 unsigned long val;
439 int err;
440
441 err = kstrtoul(buf, 10, &val);
442 if (err)
443 return err;
444
445 mutex_lock(&data->update_lock);
446
447 if (!val) {
448 data->fan_min[nr] = 255;
449 new_div = data->fan_div[nr];
450
451 dev_dbg(&client->dev, "fan%u low limit set disabled\n",
452 nr + 1);
453
454 } else if (val < 1350000 / (8 * 254)) {
455 new_div = 3;
456 data->fan_min[nr] = 254;
457
458 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
459 nr + 1, FAN_FROM_REG(254, 1 << new_div));
460
461 } else {
462 unsigned int new_min = 1350000 / val;
463
464 new_div = 0;
465 while (new_min > 192 && new_div < 3) {
466 new_div++;
467 new_min /= 2;
468 }
469 if (!new_min) /* keep > 0 */
470 new_min++;
471
472 data->fan_min[nr] = new_min;
473
474 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
475 nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
476 }
477
478 if (new_div != data->fan_div[nr]) {
479 data->fan_div[nr] = new_div;
480 adm9240_write_fan_div(client, nr, new_div);
481 }
482 i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
483 data->fan_min[nr]);
484
485 mutex_unlock(&data->update_lock);
486 return count;
487 }
488
489 #define fan(nr) \
490 static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
491 show_fan, NULL, nr - 1); \
492 static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
493 show_fan_div, NULL, nr - 1); \
494 static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
495 show_fan_min, set_fan_min, nr - 1);
496
497 fan(1);
498 fan(2);
499
500 /* alarms */
501 static ssize_t show_alarms(struct device *dev,
502 struct device_attribute *attr, char *buf)
503 {
504 struct adm9240_data *data = adm9240_update_device(dev);
505 return sprintf(buf, "%u\n", data->alarms);
506 }
507 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
508
509 static ssize_t show_alarm(struct device *dev,
510 struct device_attribute *attr, char *buf)
511 {
512 int bitnr = to_sensor_dev_attr(attr)->index;
513 struct adm9240_data *data = adm9240_update_device(dev);
514 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
515 }
516 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
517 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
518 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
519 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
520 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
521 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
522 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
523 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
524 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
525
526 /* vid */
527 static ssize_t show_vid(struct device *dev,
528 struct device_attribute *attr, char *buf)
529 {
530 struct adm9240_data *data = adm9240_update_device(dev);
531 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
532 }
533 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
534
535 /* analog output */
536 static ssize_t show_aout(struct device *dev,
537 struct device_attribute *attr, char *buf)
538 {
539 struct adm9240_data *data = adm9240_update_device(dev);
540 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
541 }
542
543 static ssize_t set_aout(struct device *dev,
544 struct device_attribute *attr,
545 const char *buf, size_t count)
546 {
547 struct adm9240_data *data = dev_get_drvdata(dev);
548 struct i2c_client *client = data->client;
549 long val;
550 int err;
551
552 err = kstrtol(buf, 10, &val);
553 if (err)
554 return err;
555
556 mutex_lock(&data->update_lock);
557 data->aout = AOUT_TO_REG(val);
558 i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
559 mutex_unlock(&data->update_lock);
560 return count;
561 }
562 static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
563
564 static ssize_t chassis_clear(struct device *dev,
565 struct device_attribute *attr,
566 const char *buf, size_t count)
567 {
568 struct adm9240_data *data = dev_get_drvdata(dev);
569 struct i2c_client *client = data->client;
570 unsigned long val;
571
572 if (kstrtoul(buf, 10, &val) || val != 0)
573 return -EINVAL;
574
575 mutex_lock(&data->update_lock);
576 i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
577 data->valid = 0; /* Force cache refresh */
578 mutex_unlock(&data->update_lock);
579 dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
580
581 return count;
582 }
583 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm,
584 chassis_clear, 12);
585
586 static struct attribute *adm9240_attrs[] = {
587 &sensor_dev_attr_in0_input.dev_attr.attr,
588 &sensor_dev_attr_in0_min.dev_attr.attr,
589 &sensor_dev_attr_in0_max.dev_attr.attr,
590 &sensor_dev_attr_in0_alarm.dev_attr.attr,
591 &sensor_dev_attr_in1_input.dev_attr.attr,
592 &sensor_dev_attr_in1_min.dev_attr.attr,
593 &sensor_dev_attr_in1_max.dev_attr.attr,
594 &sensor_dev_attr_in1_alarm.dev_attr.attr,
595 &sensor_dev_attr_in2_input.dev_attr.attr,
596 &sensor_dev_attr_in2_min.dev_attr.attr,
597 &sensor_dev_attr_in2_max.dev_attr.attr,
598 &sensor_dev_attr_in2_alarm.dev_attr.attr,
599 &sensor_dev_attr_in3_input.dev_attr.attr,
600 &sensor_dev_attr_in3_min.dev_attr.attr,
601 &sensor_dev_attr_in3_max.dev_attr.attr,
602 &sensor_dev_attr_in3_alarm.dev_attr.attr,
603 &sensor_dev_attr_in4_input.dev_attr.attr,
604 &sensor_dev_attr_in4_min.dev_attr.attr,
605 &sensor_dev_attr_in4_max.dev_attr.attr,
606 &sensor_dev_attr_in4_alarm.dev_attr.attr,
607 &sensor_dev_attr_in5_input.dev_attr.attr,
608 &sensor_dev_attr_in5_min.dev_attr.attr,
609 &sensor_dev_attr_in5_max.dev_attr.attr,
610 &sensor_dev_attr_in5_alarm.dev_attr.attr,
611 &dev_attr_temp1_input.attr,
612 &sensor_dev_attr_temp1_max.dev_attr.attr,
613 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
614 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
615 &sensor_dev_attr_fan1_input.dev_attr.attr,
616 &sensor_dev_attr_fan1_div.dev_attr.attr,
617 &sensor_dev_attr_fan1_min.dev_attr.attr,
618 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
619 &sensor_dev_attr_fan2_input.dev_attr.attr,
620 &sensor_dev_attr_fan2_div.dev_attr.attr,
621 &sensor_dev_attr_fan2_min.dev_attr.attr,
622 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
623 &dev_attr_alarms.attr,
624 &dev_attr_aout_output.attr,
625 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
626 &dev_attr_cpu0_vid.attr,
627 NULL
628 };
629
630 ATTRIBUTE_GROUPS(adm9240);
631
632
633 /*** sensor chip detect and driver install ***/
634
635 /* Return 0 if detection is successful, -ENODEV otherwise */
636 static int adm9240_detect(struct i2c_client *new_client,
637 struct i2c_board_info *info)
638 {
639 struct i2c_adapter *adapter = new_client->adapter;
640 const char *name = "";
641 int address = new_client->addr;
642 u8 man_id, die_rev;
643
644 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
645 return -ENODEV;
646
647 /* verify chip: reg address should match i2c address */
648 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
649 != address) {
650 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
651 address);
652 return -ENODEV;
653 }
654
655 /* check known chip manufacturer */
656 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
657 if (man_id == 0x23) {
658 name = "adm9240";
659 } else if (man_id == 0xda) {
660 name = "ds1780";
661 } else if (man_id == 0x01) {
662 name = "lm81";
663 } else {
664 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
665 man_id);
666 return -ENODEV;
667 }
668
669 /* successful detect, print chip info */
670 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
671 dev_info(&adapter->dev, "found %s revision %u\n",
672 man_id == 0x23 ? "ADM9240" :
673 man_id == 0xda ? "DS1780" : "LM81", die_rev);
674
675 strlcpy(info->type, name, I2C_NAME_SIZE);
676
677 return 0;
678 }
679
680 static void adm9240_init_client(struct i2c_client *client)
681 {
682 struct adm9240_data *data = i2c_get_clientdata(client);
683 u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
684 u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
685
686 data->vrm = vid_which_vrm(); /* need this to report vid as mV */
687
688 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
689 data->vrm % 10);
690
691 if (conf & 1) { /* measurement cycle running: report state */
692
693 dev_info(&client->dev, "status: config 0x%02x mode %u\n",
694 conf, mode);
695
696 } else { /* cold start: open limits before starting chip */
697 int i;
698
699 for (i = 0; i < 6; i++) {
700 i2c_smbus_write_byte_data(client,
701 ADM9240_REG_IN_MIN(i), 0);
702 i2c_smbus_write_byte_data(client,
703 ADM9240_REG_IN_MAX(i), 255);
704 }
705 i2c_smbus_write_byte_data(client,
706 ADM9240_REG_FAN_MIN(0), 255);
707 i2c_smbus_write_byte_data(client,
708 ADM9240_REG_FAN_MIN(1), 255);
709 i2c_smbus_write_byte_data(client,
710 ADM9240_REG_TEMP_MAX(0), 127);
711 i2c_smbus_write_byte_data(client,
712 ADM9240_REG_TEMP_MAX(1), 127);
713
714 /* start measurement cycle */
715 i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
716
717 dev_info(&client->dev,
718 "cold start: config was 0x%02x mode %u\n", conf, mode);
719 }
720 }
721
722 static int adm9240_probe(struct i2c_client *new_client,
723 const struct i2c_device_id *id)
724 {
725 struct device *dev = &new_client->dev;
726 struct device *hwmon_dev;
727 struct adm9240_data *data;
728
729 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
730 if (!data)
731 return -ENOMEM;
732
733 i2c_set_clientdata(new_client, data);
734 data->client = new_client;
735 mutex_init(&data->update_lock);
736
737 adm9240_init_client(new_client);
738
739 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
740 new_client->name,
741 data,
742 adm9240_groups);
743 return PTR_ERR_OR_ZERO(hwmon_dev);
744 }
745
746 static const struct i2c_device_id adm9240_id[] = {
747 { "adm9240", adm9240 },
748 { "ds1780", ds1780 },
749 { "lm81", lm81 },
750 { }
751 };
752 MODULE_DEVICE_TABLE(i2c, adm9240_id);
753
754 static struct i2c_driver adm9240_driver = {
755 .class = I2C_CLASS_HWMON,
756 .driver = {
757 .name = "adm9240",
758 },
759 .probe = adm9240_probe,
760 .id_table = adm9240_id,
761 .detect = adm9240_detect,
762 .address_list = normal_i2c,
763 };
764
765 module_i2c_driver(adm9240_driver);
766
767 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
768 "Grant Coady <gcoady.lk@gmail.com> and others");
769 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
770 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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