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hwmon: (lm85) Select the closest PWM frequency
[deliverable/linux.git] / drivers / hwmon / lm85.c
1 /*
2 lm85.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring
4 Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
6 Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de>
7 Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
8
9 Chip details at <http://www.national.com/ds/LM/LM85.pdf>
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/jiffies.h>
30 #include <linux/i2c.h>
31 #include <linux/hwmon.h>
32 #include <linux/hwmon-vid.h>
33 #include <linux/hwmon-sysfs.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
36
37 /* Addresses to scan */
38 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
39
40 /* Insmod parameters */
41 I2C_CLIENT_INSMOD_6(lm85b, lm85c, adm1027, adt7463, emc6d100, emc6d102);
42
43 /* The LM85 registers */
44
45 #define LM85_REG_IN(nr) (0x20 + (nr))
46 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2)
47 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2)
48
49 #define LM85_REG_TEMP(nr) (0x25 + (nr))
50 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2)
51 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2)
52
53 /* Fan speeds are LSB, MSB (2 bytes) */
54 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2)
55 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2)
56
57 #define LM85_REG_PWM(nr) (0x30 + (nr))
58
59 #define LM85_REG_COMPANY 0x3e
60 #define LM85_REG_VERSTEP 0x3f
61 /* These are the recognized values for the above regs */
62 #define LM85_COMPANY_NATIONAL 0x01
63 #define LM85_COMPANY_ANALOG_DEV 0x41
64 #define LM85_COMPANY_SMSC 0x5c
65 #define LM85_VERSTEP_VMASK 0xf0
66 #define LM85_VERSTEP_GENERIC 0x60
67 #define LM85_VERSTEP_LM85C 0x60
68 #define LM85_VERSTEP_LM85B 0x62
69 #define LM85_VERSTEP_ADM1027 0x60
70 #define LM85_VERSTEP_ADT7463 0x62
71 #define LM85_VERSTEP_ADT7463C 0x6A
72 #define LM85_VERSTEP_EMC6D100_A0 0x60
73 #define LM85_VERSTEP_EMC6D100_A1 0x61
74 #define LM85_VERSTEP_EMC6D102 0x65
75
76 #define LM85_REG_CONFIG 0x40
77
78 #define LM85_REG_ALARM1 0x41
79 #define LM85_REG_ALARM2 0x42
80
81 #define LM85_REG_VID 0x43
82
83 /* Automated FAN control */
84 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr))
85 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr))
86 #define LM85_REG_AFAN_SPIKE1 0x62
87 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr))
88 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr))
89 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr))
90 #define LM85_REG_AFAN_HYST1 0x6d
91 #define LM85_REG_AFAN_HYST2 0x6e
92
93 #define ADM1027_REG_EXTEND_ADC1 0x76
94 #define ADM1027_REG_EXTEND_ADC2 0x77
95
96 #define EMC6D100_REG_ALARM3 0x7d
97 /* IN5, IN6 and IN7 */
98 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5))
99 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2)
100 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2)
101 #define EMC6D102_REG_EXTEND_ADC1 0x85
102 #define EMC6D102_REG_EXTEND_ADC2 0x86
103 #define EMC6D102_REG_EXTEND_ADC3 0x87
104 #define EMC6D102_REG_EXTEND_ADC4 0x88
105
106
107 /* Conversions. Rounding and limit checking is only done on the TO_REG
108 variants. Note that you should be a bit careful with which arguments
109 these macros are called: arguments may be evaluated more than once.
110 */
111
112 /* IN are scaled acording to built-in resistors */
113 static const int lm85_scaling[] = { /* .001 Volts */
114 2500, 2250, 3300, 5000, 12000,
115 3300, 1500, 1800 /*EMC6D100*/
116 };
117 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
118
119 #define INS_TO_REG(n, val) \
120 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255)
121
122 #define INSEXT_FROM_REG(n, val, ext) \
123 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])
124
125 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n])
126
127 /* FAN speed is measured using 90kHz clock */
128 static inline u16 FAN_TO_REG(unsigned long val)
129 {
130 if (!val)
131 return 0xffff;
132 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe);
133 }
134 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
135 5400000 / (val))
136
137 /* Temperature is reported in .001 degC increments */
138 #define TEMP_TO_REG(val) \
139 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127)
140 #define TEMPEXT_FROM_REG(val, ext) \
141 SCALE(((val) << 4) + (ext), 16, 1000)
142 #define TEMP_FROM_REG(val) ((val) * 1000)
143
144 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255)
145 #define PWM_FROM_REG(val) (val)
146
147
148 /* ZONEs have the following parameters:
149 * Limit (low) temp, 1. degC
150 * Hysteresis (below limit), 1. degC (0-15)
151 * Range of speed control, .1 degC (2-80)
152 * Critical (high) temp, 1. degC
153 *
154 * FAN PWMs have the following parameters:
155 * Reference Zone, 1, 2, 3, etc.
156 * Spinup time, .05 sec
157 * PWM value at limit/low temp, 1 count
158 * PWM Frequency, 1. Hz
159 * PWM is Min or OFF below limit, flag
160 * Invert PWM output, flag
161 *
162 * Some chips filter the temp, others the fan.
163 * Filter constant (or disabled) .1 seconds
164 */
165
166 /* These are the zone temperature range encodings in .001 degree C */
167 static const int lm85_range_map[] = {
168 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
169 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
170 };
171
172 static int RANGE_TO_REG(int range)
173 {
174 int i;
175
176 if (range >= lm85_range_map[15])
177 return 15;
178
179 /* Find the closest match */
180 for (i = 14; i >= 0; --i) {
181 if (range >= lm85_range_map[i]) {
182 if ((lm85_range_map[i + 1] - range) <
183 (range - lm85_range_map[i]))
184 return i + 1;
185 return i;
186 }
187 }
188
189 return 0;
190 }
191 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
192
193 /* These are the PWM frequency encodings */
194 static const int lm85_freq_map[8] = { /* 1 Hz */
195 10, 15, 23, 30, 38, 47, 62, 94
196 };
197
198 static int FREQ_TO_REG(int freq)
199 {
200 int i;
201
202 /* Find the closest match */
203 for (i = 0; i < 7; ++i)
204 if (freq <= (lm85_freq_map[i] + lm85_freq_map[i + 1]) / 2)
205 break;
206 return i;
207 }
208 #define FREQ_FROM_REG(val) lm85_freq_map[(val) & 0x07]
209
210 /* Since we can't use strings, I'm abusing these numbers
211 * to stand in for the following meanings:
212 * 1 -- PWM responds to Zone 1
213 * 2 -- PWM responds to Zone 2
214 * 3 -- PWM responds to Zone 3
215 * 23 -- PWM responds to the higher temp of Zone 2 or 3
216 * 123 -- PWM responds to highest of Zone 1, 2, or 3
217 * 0 -- PWM is always at 0% (ie, off)
218 * -1 -- PWM is always at 100%
219 * -2 -- PWM responds to manual control
220 */
221
222 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
223 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5]
224
225 static int ZONE_TO_REG(int zone)
226 {
227 int i;
228
229 for (i = 0; i <= 7; ++i)
230 if (zone == lm85_zone_map[i])
231 break;
232 if (i > 7) /* Not found. */
233 i = 3; /* Always 100% */
234 return i << 5;
235 }
236
237 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15)
238 #define HYST_FROM_REG(val) ((val) * 1000)
239
240 /* Chip sampling rates
241 *
242 * Some sensors are not updated more frequently than once per second
243 * so it doesn't make sense to read them more often than that.
244 * We cache the results and return the saved data if the driver
245 * is called again before a second has elapsed.
246 *
247 * Also, there is significant configuration data for this chip
248 * given the automatic PWM fan control that is possible. There
249 * are about 47 bytes of config data to only 22 bytes of actual
250 * readings. So, we keep the config data up to date in the cache
251 * when it is written and only sample it once every 1 *minute*
252 */
253 #define LM85_DATA_INTERVAL (HZ + HZ / 2)
254 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ)
255
256 /* LM85 can automatically adjust fan speeds based on temperature
257 * This structure encapsulates an entire Zone config. There are
258 * three zones (one for each temperature input) on the lm85
259 */
260 struct lm85_zone {
261 s8 limit; /* Low temp limit */
262 u8 hyst; /* Low limit hysteresis. (0-15) */
263 u8 range; /* Temp range, encoded */
264 s8 critical; /* "All fans ON" temp limit */
265 u8 off_desired; /* Actual "off" temperature specified. Preserved
266 * to prevent "drift" as other autofan control
267 * values change.
268 */
269 u8 max_desired; /* Actual "max" temperature specified. Preserved
270 * to prevent "drift" as other autofan control
271 * values change.
272 */
273 };
274
275 struct lm85_autofan {
276 u8 config; /* Register value */
277 u8 min_pwm; /* Minimum PWM value, encoded */
278 u8 min_off; /* Min PWM or OFF below "limit", flag */
279 };
280
281 /* For each registered chip, we need to keep some data in memory.
282 The structure is dynamically allocated. */
283 struct lm85_data {
284 struct i2c_client client;
285 struct device *hwmon_dev;
286 enum chips type;
287
288 struct mutex update_lock;
289 int valid; /* !=0 if following fields are valid */
290 unsigned long last_reading; /* In jiffies */
291 unsigned long last_config; /* In jiffies */
292
293 u8 in[8]; /* Register value */
294 u8 in_max[8]; /* Register value */
295 u8 in_min[8]; /* Register value */
296 s8 temp[3]; /* Register value */
297 s8 temp_min[3]; /* Register value */
298 s8 temp_max[3]; /* Register value */
299 u16 fan[4]; /* Register value */
300 u16 fan_min[4]; /* Register value */
301 u8 pwm[3]; /* Register value */
302 u8 pwm_freq[3]; /* Register encoding */
303 u8 temp_ext[3]; /* Decoded values */
304 u8 in_ext[8]; /* Decoded values */
305 u8 vid; /* Register value */
306 u8 vrm; /* VRM version */
307 u32 alarms; /* Register encoding, combined */
308 struct lm85_autofan autofan[3];
309 struct lm85_zone zone[3];
310 };
311
312 static int lm85_attach_adapter(struct i2c_adapter *adapter);
313 static int lm85_detect(struct i2c_adapter *adapter, int address,
314 int kind);
315 static int lm85_detach_client(struct i2c_client *client);
316
317 static int lm85_read_value(struct i2c_client *client, u8 reg);
318 static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
319 static struct lm85_data *lm85_update_device(struct device *dev);
320
321
322 static struct i2c_driver lm85_driver = {
323 .driver = {
324 .name = "lm85",
325 },
326 .attach_adapter = lm85_attach_adapter,
327 .detach_client = lm85_detach_client,
328 };
329
330
331 /* 4 Fans */
332 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
333 char *buf)
334 {
335 int nr = to_sensor_dev_attr(attr)->index;
336 struct lm85_data *data = lm85_update_device(dev);
337 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
338 }
339
340 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
341 char *buf)
342 {
343 int nr = to_sensor_dev_attr(attr)->index;
344 struct lm85_data *data = lm85_update_device(dev);
345 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr]));
346 }
347
348 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
349 const char *buf, size_t count)
350 {
351 int nr = to_sensor_dev_attr(attr)->index;
352 struct i2c_client *client = to_i2c_client(dev);
353 struct lm85_data *data = i2c_get_clientdata(client);
354 unsigned long val = simple_strtoul(buf, NULL, 10);
355
356 mutex_lock(&data->update_lock);
357 data->fan_min[nr] = FAN_TO_REG(val);
358 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
359 mutex_unlock(&data->update_lock);
360 return count;
361 }
362
363 #define show_fan_offset(offset) \
364 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
365 show_fan, NULL, offset - 1); \
366 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
367 show_fan_min, set_fan_min, offset - 1)
368
369 show_fan_offset(1);
370 show_fan_offset(2);
371 show_fan_offset(3);
372 show_fan_offset(4);
373
374 /* vid, vrm, alarms */
375
376 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
377 char *buf)
378 {
379 struct lm85_data *data = lm85_update_device(dev);
380 int vid;
381
382 if (data->type == adt7463 && (data->vid & 0x80)) {
383 /* 6-pin VID (VRM 10) */
384 vid = vid_from_reg(data->vid & 0x3f, data->vrm);
385 } else {
386 /* 5-pin VID (VRM 9) */
387 vid = vid_from_reg(data->vid & 0x1f, data->vrm);
388 }
389
390 return sprintf(buf, "%d\n", vid);
391 }
392
393 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
394
395 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
396 char *buf)
397 {
398 struct lm85_data *data = dev_get_drvdata(dev);
399 return sprintf(buf, "%ld\n", (long) data->vrm);
400 }
401
402 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
403 const char *buf, size_t count)
404 {
405 struct lm85_data *data = dev_get_drvdata(dev);
406 data->vrm = simple_strtoul(buf, NULL, 10);
407 return count;
408 }
409
410 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
411
412 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
413 *attr, char *buf)
414 {
415 struct lm85_data *data = lm85_update_device(dev);
416 return sprintf(buf, "%u\n", data->alarms);
417 }
418
419 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
420
421 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
422 char *buf)
423 {
424 int nr = to_sensor_dev_attr(attr)->index;
425 struct lm85_data *data = lm85_update_device(dev);
426 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
427 }
428
429 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
430 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
431 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
432 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
433 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
434 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
435 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
436 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
437 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
438 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
439 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
440 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
441 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
442 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
443 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
444 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
445 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
446
447 /* pwm */
448
449 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
450 char *buf)
451 {
452 int nr = to_sensor_dev_attr(attr)->index;
453 struct lm85_data *data = lm85_update_device(dev);
454 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
455 }
456
457 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
458 const char *buf, size_t count)
459 {
460 int nr = to_sensor_dev_attr(attr)->index;
461 struct i2c_client *client = to_i2c_client(dev);
462 struct lm85_data *data = i2c_get_clientdata(client);
463 long val = simple_strtol(buf, NULL, 10);
464
465 mutex_lock(&data->update_lock);
466 data->pwm[nr] = PWM_TO_REG(val);
467 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
468 mutex_unlock(&data->update_lock);
469 return count;
470 }
471
472 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
473 *attr, char *buf)
474 {
475 int nr = to_sensor_dev_attr(attr)->index;
476 struct lm85_data *data = lm85_update_device(dev);
477 int pwm_zone, enable;
478
479 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
480 switch (pwm_zone) {
481 case -1: /* PWM is always at 100% */
482 enable = 0;
483 break;
484 case 0: /* PWM is always at 0% */
485 case -2: /* PWM responds to manual control */
486 enable = 1;
487 break;
488 default: /* PWM in automatic mode */
489 enable = 2;
490 }
491 return sprintf(buf, "%d\n", enable);
492 }
493
494 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
495 *attr, const char *buf, size_t count)
496 {
497 int nr = to_sensor_dev_attr(attr)->index;
498 struct i2c_client *client = to_i2c_client(dev);
499 struct lm85_data *data = i2c_get_clientdata(client);
500 long val = simple_strtol(buf, NULL, 10);
501 u8 config;
502
503 switch (val) {
504 case 0:
505 config = 3;
506 break;
507 case 1:
508 config = 7;
509 break;
510 case 2:
511 /* Here we have to choose arbitrarily one of the 5 possible
512 configurations; I go for the safest */
513 config = 6;
514 break;
515 default:
516 return -EINVAL;
517 }
518
519 mutex_lock(&data->update_lock);
520 data->autofan[nr].config = lm85_read_value(client,
521 LM85_REG_AFAN_CONFIG(nr));
522 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
523 | (config << 5);
524 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
525 data->autofan[nr].config);
526 mutex_unlock(&data->update_lock);
527 return count;
528 }
529
530 static ssize_t show_pwm_freq(struct device *dev,
531 struct device_attribute *attr, char *buf)
532 {
533 int nr = to_sensor_dev_attr(attr)->index;
534 struct lm85_data *data = lm85_update_device(dev);
535 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->pwm_freq[nr]));
536 }
537
538 static ssize_t set_pwm_freq(struct device *dev,
539 struct device_attribute *attr, const char *buf, size_t count)
540 {
541 int nr = to_sensor_dev_attr(attr)->index;
542 struct i2c_client *client = to_i2c_client(dev);
543 struct lm85_data *data = i2c_get_clientdata(client);
544 long val = simple_strtol(buf, NULL, 10);
545
546 mutex_lock(&data->update_lock);
547 data->pwm_freq[nr] = FREQ_TO_REG(val);
548 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
549 (data->zone[nr].range << 4)
550 | data->pwm_freq[nr]);
551 mutex_unlock(&data->update_lock);
552 return count;
553 }
554
555 #define show_pwm_reg(offset) \
556 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
557 show_pwm, set_pwm, offset - 1); \
558 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
559 show_pwm_enable, set_pwm_enable, offset - 1); \
560 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
561 show_pwm_freq, set_pwm_freq, offset - 1)
562
563 show_pwm_reg(1);
564 show_pwm_reg(2);
565 show_pwm_reg(3);
566
567 /* Voltages */
568
569 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
570 char *buf)
571 {
572 int nr = to_sensor_dev_attr(attr)->index;
573 struct lm85_data *data = lm85_update_device(dev);
574 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
575 data->in_ext[nr]));
576 }
577
578 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
579 char *buf)
580 {
581 int nr = to_sensor_dev_attr(attr)->index;
582 struct lm85_data *data = lm85_update_device(dev);
583 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
584 }
585
586 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
587 const char *buf, size_t count)
588 {
589 int nr = to_sensor_dev_attr(attr)->index;
590 struct i2c_client *client = to_i2c_client(dev);
591 struct lm85_data *data = i2c_get_clientdata(client);
592 long val = simple_strtol(buf, NULL, 10);
593
594 mutex_lock(&data->update_lock);
595 data->in_min[nr] = INS_TO_REG(nr, val);
596 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
597 mutex_unlock(&data->update_lock);
598 return count;
599 }
600
601 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
602 char *buf)
603 {
604 int nr = to_sensor_dev_attr(attr)->index;
605 struct lm85_data *data = lm85_update_device(dev);
606 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
607 }
608
609 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
610 const char *buf, size_t count)
611 {
612 int nr = to_sensor_dev_attr(attr)->index;
613 struct i2c_client *client = to_i2c_client(dev);
614 struct lm85_data *data = i2c_get_clientdata(client);
615 long val = simple_strtol(buf, NULL, 10);
616
617 mutex_lock(&data->update_lock);
618 data->in_max[nr] = INS_TO_REG(nr, val);
619 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
620 mutex_unlock(&data->update_lock);
621 return count;
622 }
623
624 #define show_in_reg(offset) \
625 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
626 show_in, NULL, offset); \
627 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
628 show_in_min, set_in_min, offset); \
629 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
630 show_in_max, set_in_max, offset)
631
632 show_in_reg(0);
633 show_in_reg(1);
634 show_in_reg(2);
635 show_in_reg(3);
636 show_in_reg(4);
637 show_in_reg(5);
638 show_in_reg(6);
639 show_in_reg(7);
640
641 /* Temps */
642
643 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
644 char *buf)
645 {
646 int nr = to_sensor_dev_attr(attr)->index;
647 struct lm85_data *data = lm85_update_device(dev);
648 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
649 data->temp_ext[nr]));
650 }
651
652 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
653 char *buf)
654 {
655 int nr = to_sensor_dev_attr(attr)->index;
656 struct lm85_data *data = lm85_update_device(dev);
657 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
658 }
659
660 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
661 const char *buf, size_t count)
662 {
663 int nr = to_sensor_dev_attr(attr)->index;
664 struct i2c_client *client = to_i2c_client(dev);
665 struct lm85_data *data = i2c_get_clientdata(client);
666 long val = simple_strtol(buf, NULL, 10);
667
668 mutex_lock(&data->update_lock);
669 data->temp_min[nr] = TEMP_TO_REG(val);
670 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
671 mutex_unlock(&data->update_lock);
672 return count;
673 }
674
675 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
676 char *buf)
677 {
678 int nr = to_sensor_dev_attr(attr)->index;
679 struct lm85_data *data = lm85_update_device(dev);
680 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
681 }
682
683 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
684 const char *buf, size_t count)
685 {
686 int nr = to_sensor_dev_attr(attr)->index;
687 struct i2c_client *client = to_i2c_client(dev);
688 struct lm85_data *data = i2c_get_clientdata(client);
689 long val = simple_strtol(buf, NULL, 10);
690
691 mutex_lock(&data->update_lock);
692 data->temp_max[nr] = TEMP_TO_REG(val);
693 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
694 mutex_unlock(&data->update_lock);
695 return count;
696 }
697
698 #define show_temp_reg(offset) \
699 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
700 show_temp, NULL, offset - 1); \
701 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
702 show_temp_min, set_temp_min, offset - 1); \
703 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
704 show_temp_max, set_temp_max, offset - 1);
705
706 show_temp_reg(1);
707 show_temp_reg(2);
708 show_temp_reg(3);
709
710
711 /* Automatic PWM control */
712
713 static ssize_t show_pwm_auto_channels(struct device *dev,
714 struct device_attribute *attr, char *buf)
715 {
716 int nr = to_sensor_dev_attr(attr)->index;
717 struct lm85_data *data = lm85_update_device(dev);
718 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
719 }
720
721 static ssize_t set_pwm_auto_channels(struct device *dev,
722 struct device_attribute *attr, const char *buf, size_t count)
723 {
724 int nr = to_sensor_dev_attr(attr)->index;
725 struct i2c_client *client = to_i2c_client(dev);
726 struct lm85_data *data = i2c_get_clientdata(client);
727 long val = simple_strtol(buf, NULL, 10);
728
729 mutex_lock(&data->update_lock);
730 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
731 | ZONE_TO_REG(val);
732 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
733 data->autofan[nr].config);
734 mutex_unlock(&data->update_lock);
735 return count;
736 }
737
738 static ssize_t show_pwm_auto_pwm_min(struct device *dev,
739 struct device_attribute *attr, char *buf)
740 {
741 int nr = to_sensor_dev_attr(attr)->index;
742 struct lm85_data *data = lm85_update_device(dev);
743 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
744 }
745
746 static ssize_t set_pwm_auto_pwm_min(struct device *dev,
747 struct device_attribute *attr, const char *buf, size_t count)
748 {
749 int nr = to_sensor_dev_attr(attr)->index;
750 struct i2c_client *client = to_i2c_client(dev);
751 struct lm85_data *data = i2c_get_clientdata(client);
752 long val = simple_strtol(buf, NULL, 10);
753
754 mutex_lock(&data->update_lock);
755 data->autofan[nr].min_pwm = PWM_TO_REG(val);
756 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
757 data->autofan[nr].min_pwm);
758 mutex_unlock(&data->update_lock);
759 return count;
760 }
761
762 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
763 struct device_attribute *attr, char *buf)
764 {
765 int nr = to_sensor_dev_attr(attr)->index;
766 struct lm85_data *data = lm85_update_device(dev);
767 return sprintf(buf, "%d\n", data->autofan[nr].min_off);
768 }
769
770 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
771 struct device_attribute *attr, const char *buf, size_t count)
772 {
773 int nr = to_sensor_dev_attr(attr)->index;
774 struct i2c_client *client = to_i2c_client(dev);
775 struct lm85_data *data = i2c_get_clientdata(client);
776 long val = simple_strtol(buf, NULL, 10);
777 u8 tmp;
778
779 mutex_lock(&data->update_lock);
780 data->autofan[nr].min_off = val;
781 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
782 tmp &= ~(0x20 << nr);
783 if (data->autofan[nr].min_off)
784 tmp |= 0x20 << nr;
785 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
786 mutex_unlock(&data->update_lock);
787 return count;
788 }
789
790 #define pwm_auto(offset) \
791 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
792 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
793 set_pwm_auto_channels, offset - 1); \
794 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
795 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \
796 set_pwm_auto_pwm_min, offset - 1); \
797 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
798 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
799 set_pwm_auto_pwm_minctl, offset - 1)
800
801 pwm_auto(1);
802 pwm_auto(2);
803 pwm_auto(3);
804
805 /* Temperature settings for automatic PWM control */
806
807 static ssize_t show_temp_auto_temp_off(struct device *dev,
808 struct device_attribute *attr, char *buf)
809 {
810 int nr = to_sensor_dev_attr(attr)->index;
811 struct lm85_data *data = lm85_update_device(dev);
812 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
813 HYST_FROM_REG(data->zone[nr].hyst));
814 }
815
816 static ssize_t set_temp_auto_temp_off(struct device *dev,
817 struct device_attribute *attr, const char *buf, size_t count)
818 {
819 int nr = to_sensor_dev_attr(attr)->index;
820 struct i2c_client *client = to_i2c_client(dev);
821 struct lm85_data *data = i2c_get_clientdata(client);
822 int min;
823 long val = simple_strtol(buf, NULL, 10);
824
825 mutex_lock(&data->update_lock);
826 min = TEMP_FROM_REG(data->zone[nr].limit);
827 data->zone[nr].off_desired = TEMP_TO_REG(val);
828 data->zone[nr].hyst = HYST_TO_REG(min - val);
829 if (nr == 0 || nr == 1) {
830 lm85_write_value(client, LM85_REG_AFAN_HYST1,
831 (data->zone[0].hyst << 4)
832 | data->zone[1].hyst);
833 } else {
834 lm85_write_value(client, LM85_REG_AFAN_HYST2,
835 (data->zone[2].hyst << 4));
836 }
837 mutex_unlock(&data->update_lock);
838 return count;
839 }
840
841 static ssize_t show_temp_auto_temp_min(struct device *dev,
842 struct device_attribute *attr, char *buf)
843 {
844 int nr = to_sensor_dev_attr(attr)->index;
845 struct lm85_data *data = lm85_update_device(dev);
846 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
847 }
848
849 static ssize_t set_temp_auto_temp_min(struct device *dev,
850 struct device_attribute *attr, const char *buf, size_t count)
851 {
852 int nr = to_sensor_dev_attr(attr)->index;
853 struct i2c_client *client = to_i2c_client(dev);
854 struct lm85_data *data = i2c_get_clientdata(client);
855 long val = simple_strtol(buf, NULL, 10);
856
857 mutex_lock(&data->update_lock);
858 data->zone[nr].limit = TEMP_TO_REG(val);
859 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
860 data->zone[nr].limit);
861
862 /* Update temp_auto_max and temp_auto_range */
863 data->zone[nr].range = RANGE_TO_REG(
864 TEMP_FROM_REG(data->zone[nr].max_desired) -
865 TEMP_FROM_REG(data->zone[nr].limit));
866 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
867 ((data->zone[nr].range & 0x0f) << 4)
868 | (data->pwm_freq[nr] & 0x07));
869
870 /* Update temp_auto_hyst and temp_auto_off */
871 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
872 data->zone[nr].limit) - TEMP_FROM_REG(
873 data->zone[nr].off_desired));
874 if (nr == 0 || nr == 1) {
875 lm85_write_value(client, LM85_REG_AFAN_HYST1,
876 (data->zone[0].hyst << 4)
877 | data->zone[1].hyst);
878 } else {
879 lm85_write_value(client, LM85_REG_AFAN_HYST2,
880 (data->zone[2].hyst << 4));
881 }
882 mutex_unlock(&data->update_lock);
883 return count;
884 }
885
886 static ssize_t show_temp_auto_temp_max(struct device *dev,
887 struct device_attribute *attr, char *buf)
888 {
889 int nr = to_sensor_dev_attr(attr)->index;
890 struct lm85_data *data = lm85_update_device(dev);
891 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
892 RANGE_FROM_REG(data->zone[nr].range));
893 }
894
895 static ssize_t set_temp_auto_temp_max(struct device *dev,
896 struct device_attribute *attr, const char *buf, size_t count)
897 {
898 int nr = to_sensor_dev_attr(attr)->index;
899 struct i2c_client *client = to_i2c_client(dev);
900 struct lm85_data *data = i2c_get_clientdata(client);
901 int min;
902 long val = simple_strtol(buf, NULL, 10);
903
904 mutex_lock(&data->update_lock);
905 min = TEMP_FROM_REG(data->zone[nr].limit);
906 data->zone[nr].max_desired = TEMP_TO_REG(val);
907 data->zone[nr].range = RANGE_TO_REG(
908 val - min);
909 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
910 ((data->zone[nr].range & 0x0f) << 4)
911 | (data->pwm_freq[nr] & 0x07));
912 mutex_unlock(&data->update_lock);
913 return count;
914 }
915
916 static ssize_t show_temp_auto_temp_crit(struct device *dev,
917 struct device_attribute *attr, char *buf)
918 {
919 int nr = to_sensor_dev_attr(attr)->index;
920 struct lm85_data *data = lm85_update_device(dev);
921 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
922 }
923
924 static ssize_t set_temp_auto_temp_crit(struct device *dev,
925 struct device_attribute *attr, const char *buf, size_t count)
926 {
927 int nr = to_sensor_dev_attr(attr)->index;
928 struct i2c_client *client = to_i2c_client(dev);
929 struct lm85_data *data = i2c_get_clientdata(client);
930 long val = simple_strtol(buf, NULL, 10);
931
932 mutex_lock(&data->update_lock);
933 data->zone[nr].critical = TEMP_TO_REG(val);
934 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
935 data->zone[nr].critical);
936 mutex_unlock(&data->update_lock);
937 return count;
938 }
939
940 #define temp_auto(offset) \
941 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \
942 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \
943 set_temp_auto_temp_off, offset - 1); \
944 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \
945 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \
946 set_temp_auto_temp_min, offset - 1); \
947 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \
948 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \
949 set_temp_auto_temp_max, offset - 1); \
950 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \
951 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \
952 set_temp_auto_temp_crit, offset - 1);
953
954 temp_auto(1);
955 temp_auto(2);
956 temp_auto(3);
957
958 static int lm85_attach_adapter(struct i2c_adapter *adapter)
959 {
960 if (!(adapter->class & I2C_CLASS_HWMON))
961 return 0;
962 return i2c_probe(adapter, &addr_data, lm85_detect);
963 }
964
965 static struct attribute *lm85_attributes[] = {
966 &sensor_dev_attr_fan1_input.dev_attr.attr,
967 &sensor_dev_attr_fan2_input.dev_attr.attr,
968 &sensor_dev_attr_fan3_input.dev_attr.attr,
969 &sensor_dev_attr_fan4_input.dev_attr.attr,
970 &sensor_dev_attr_fan1_min.dev_attr.attr,
971 &sensor_dev_attr_fan2_min.dev_attr.attr,
972 &sensor_dev_attr_fan3_min.dev_attr.attr,
973 &sensor_dev_attr_fan4_min.dev_attr.attr,
974 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
975 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
976 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
977 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
978
979 &sensor_dev_attr_pwm1.dev_attr.attr,
980 &sensor_dev_attr_pwm2.dev_attr.attr,
981 &sensor_dev_attr_pwm3.dev_attr.attr,
982 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
983 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
984 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
985 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
986 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
987 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
988
989 &sensor_dev_attr_in0_input.dev_attr.attr,
990 &sensor_dev_attr_in1_input.dev_attr.attr,
991 &sensor_dev_attr_in2_input.dev_attr.attr,
992 &sensor_dev_attr_in3_input.dev_attr.attr,
993 &sensor_dev_attr_in0_min.dev_attr.attr,
994 &sensor_dev_attr_in1_min.dev_attr.attr,
995 &sensor_dev_attr_in2_min.dev_attr.attr,
996 &sensor_dev_attr_in3_min.dev_attr.attr,
997 &sensor_dev_attr_in0_max.dev_attr.attr,
998 &sensor_dev_attr_in1_max.dev_attr.attr,
999 &sensor_dev_attr_in2_max.dev_attr.attr,
1000 &sensor_dev_attr_in3_max.dev_attr.attr,
1001 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1002 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1003 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1004 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1005
1006 &sensor_dev_attr_temp1_input.dev_attr.attr,
1007 &sensor_dev_attr_temp2_input.dev_attr.attr,
1008 &sensor_dev_attr_temp3_input.dev_attr.attr,
1009 &sensor_dev_attr_temp1_min.dev_attr.attr,
1010 &sensor_dev_attr_temp2_min.dev_attr.attr,
1011 &sensor_dev_attr_temp3_min.dev_attr.attr,
1012 &sensor_dev_attr_temp1_max.dev_attr.attr,
1013 &sensor_dev_attr_temp2_max.dev_attr.attr,
1014 &sensor_dev_attr_temp3_max.dev_attr.attr,
1015 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1016 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1017 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1018 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1019 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1020
1021 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1022 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1023 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1024 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1025 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1026 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1027 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1028 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1029 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1030
1031 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1032 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1033 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1034 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1035 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1036 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1037 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1038 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1039 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1040 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1041 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1042 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1043
1044 &dev_attr_vrm.attr,
1045 &dev_attr_cpu0_vid.attr,
1046 &dev_attr_alarms.attr,
1047 NULL
1048 };
1049
1050 static const struct attribute_group lm85_group = {
1051 .attrs = lm85_attributes,
1052 };
1053
1054 static struct attribute *lm85_attributes_in4[] = {
1055 &sensor_dev_attr_in4_input.dev_attr.attr,
1056 &sensor_dev_attr_in4_min.dev_attr.attr,
1057 &sensor_dev_attr_in4_max.dev_attr.attr,
1058 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1059 NULL
1060 };
1061
1062 static const struct attribute_group lm85_group_in4 = {
1063 .attrs = lm85_attributes_in4,
1064 };
1065
1066 static struct attribute *lm85_attributes_in567[] = {
1067 &sensor_dev_attr_in5_input.dev_attr.attr,
1068 &sensor_dev_attr_in6_input.dev_attr.attr,
1069 &sensor_dev_attr_in7_input.dev_attr.attr,
1070 &sensor_dev_attr_in5_min.dev_attr.attr,
1071 &sensor_dev_attr_in6_min.dev_attr.attr,
1072 &sensor_dev_attr_in7_min.dev_attr.attr,
1073 &sensor_dev_attr_in5_max.dev_attr.attr,
1074 &sensor_dev_attr_in6_max.dev_attr.attr,
1075 &sensor_dev_attr_in7_max.dev_attr.attr,
1076 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1077 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1078 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1079 NULL
1080 };
1081
1082 static const struct attribute_group lm85_group_in567 = {
1083 .attrs = lm85_attributes_in567,
1084 };
1085
1086 static void lm85_init_client(struct i2c_client *client)
1087 {
1088 int value;
1089
1090 /* Start monitoring if needed */
1091 value = lm85_read_value(client, LM85_REG_CONFIG);
1092 if (!(value & 0x01)) {
1093 dev_info(&client->dev, "Starting monitoring\n");
1094 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1095 }
1096
1097 /* Warn about unusual configuration bits */
1098 if (value & 0x02)
1099 dev_warn(&client->dev, "Device configuration is locked\n");
1100 if (!(value & 0x04))
1101 dev_warn(&client->dev, "Device is not ready\n");
1102 }
1103
1104 static int lm85_detect(struct i2c_adapter *adapter, int address,
1105 int kind)
1106 {
1107 struct i2c_client *client;
1108 struct lm85_data *data;
1109 int err = 0;
1110 const char *type_name;
1111
1112 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1113 /* We need to be able to do byte I/O */
1114 goto ERROR0;
1115 }
1116
1117 if (!(data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL))) {
1118 err = -ENOMEM;
1119 goto ERROR0;
1120 }
1121
1122 client = &data->client;
1123 i2c_set_clientdata(client, data);
1124 client->addr = address;
1125 client->adapter = adapter;
1126 client->driver = &lm85_driver;
1127
1128 /* If auto-detecting, determine the chip type */
1129 if (kind < 0) {
1130 int company = lm85_read_value(client, LM85_REG_COMPANY);
1131 int verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1132
1133 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1134 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1135 address, company, verstep);
1136
1137 /* All supported chips have the version in common */
1138 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC) {
1139 dev_dbg(&adapter->dev, "Autodetection failed: "
1140 "unsupported version\n");
1141 goto ERROR1;
1142 }
1143 kind = any_chip;
1144
1145 /* Now, refine the detection */
1146 if (company == LM85_COMPANY_NATIONAL) {
1147 switch (verstep) {
1148 case LM85_VERSTEP_LM85C:
1149 kind = lm85c;
1150 break;
1151 case LM85_VERSTEP_LM85B:
1152 kind = lm85b;
1153 break;
1154 }
1155 } else if (company == LM85_COMPANY_ANALOG_DEV) {
1156 switch (verstep) {
1157 case LM85_VERSTEP_ADM1027:
1158 kind = adm1027;
1159 break;
1160 case LM85_VERSTEP_ADT7463:
1161 case LM85_VERSTEP_ADT7463C:
1162 kind = adt7463;
1163 break;
1164 }
1165 } else if (company == LM85_COMPANY_SMSC) {
1166 switch (verstep) {
1167 case LM85_VERSTEP_EMC6D100_A0:
1168 case LM85_VERSTEP_EMC6D100_A1:
1169 /* Note: we can't tell a '100 from a '101 */
1170 kind = emc6d100;
1171 break;
1172 case LM85_VERSTEP_EMC6D102:
1173 kind = emc6d102;
1174 break;
1175 }
1176 } else {
1177 dev_dbg(&adapter->dev, "Autodetection failed: "
1178 "unknown vendor\n");
1179 goto ERROR1;
1180 }
1181 }
1182
1183 /* Fill in the chip specific driver values */
1184 switch (kind) {
1185 case lm85b:
1186 type_name = "lm85b";
1187 break;
1188 case lm85c:
1189 type_name = "lm85c";
1190 break;
1191 case adm1027:
1192 type_name = "adm1027";
1193 break;
1194 case adt7463:
1195 type_name = "adt7463";
1196 break;
1197 case emc6d100:
1198 type_name = "emc6d100";
1199 break;
1200 case emc6d102:
1201 type_name = "emc6d102";
1202 break;
1203 default:
1204 type_name = "lm85";
1205 }
1206 strlcpy(client->name, type_name, I2C_NAME_SIZE);
1207
1208 /* Fill in the remaining client fields */
1209 data->type = kind;
1210 mutex_init(&data->update_lock);
1211
1212 /* Tell the I2C layer a new client has arrived */
1213 err = i2c_attach_client(client);
1214 if (err)
1215 goto ERROR1;
1216
1217 /* Set the VRM version */
1218 data->vrm = vid_which_vrm();
1219
1220 /* Initialize the LM85 chip */
1221 lm85_init_client(client);
1222
1223 /* Register sysfs hooks */
1224 err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1225 if (err)
1226 goto ERROR2;
1227
1228 /* The ADT7463 has an optional VRM 10 mode where pin 21 is used
1229 as a sixth digital VID input rather than an analog input. */
1230 data->vid = lm85_read_value(client, LM85_REG_VID);
1231 if (!(kind == adt7463 && (data->vid & 0x80)))
1232 if ((err = sysfs_create_group(&client->dev.kobj,
1233 &lm85_group_in4)))
1234 goto ERROR3;
1235
1236 /* The EMC6D100 has 3 additional voltage inputs */
1237 if (kind == emc6d100)
1238 if ((err = sysfs_create_group(&client->dev.kobj,
1239 &lm85_group_in567)))
1240 goto ERROR3;
1241
1242 data->hwmon_dev = hwmon_device_register(&client->dev);
1243 if (IS_ERR(data->hwmon_dev)) {
1244 err = PTR_ERR(data->hwmon_dev);
1245 goto ERROR3;
1246 }
1247
1248 return 0;
1249
1250 /* Error out and cleanup code */
1251 ERROR3:
1252 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1253 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1254 if (kind == emc6d100)
1255 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1256 ERROR2:
1257 i2c_detach_client(client);
1258 ERROR1:
1259 kfree(data);
1260 ERROR0:
1261 return err;
1262 }
1263
1264 static int lm85_detach_client(struct i2c_client *client)
1265 {
1266 struct lm85_data *data = i2c_get_clientdata(client);
1267 hwmon_device_unregister(data->hwmon_dev);
1268 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1269 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1270 if (data->type == emc6d100)
1271 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1272 i2c_detach_client(client);
1273 kfree(data);
1274 return 0;
1275 }
1276
1277
1278 static int lm85_read_value(struct i2c_client *client, u8 reg)
1279 {
1280 int res;
1281
1282 /* What size location is it? */
1283 switch (reg) {
1284 case LM85_REG_FAN(0): /* Read WORD data */
1285 case LM85_REG_FAN(1):
1286 case LM85_REG_FAN(2):
1287 case LM85_REG_FAN(3):
1288 case LM85_REG_FAN_MIN(0):
1289 case LM85_REG_FAN_MIN(1):
1290 case LM85_REG_FAN_MIN(2):
1291 case LM85_REG_FAN_MIN(3):
1292 case LM85_REG_ALARM1: /* Read both bytes at once */
1293 res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1294 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1295 break;
1296 default: /* Read BYTE data */
1297 res = i2c_smbus_read_byte_data(client, reg);
1298 break;
1299 }
1300
1301 return res;
1302 }
1303
1304 static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1305 {
1306 switch (reg) {
1307 case LM85_REG_FAN(0): /* Write WORD data */
1308 case LM85_REG_FAN(1):
1309 case LM85_REG_FAN(2):
1310 case LM85_REG_FAN(3):
1311 case LM85_REG_FAN_MIN(0):
1312 case LM85_REG_FAN_MIN(1):
1313 case LM85_REG_FAN_MIN(2):
1314 case LM85_REG_FAN_MIN(3):
1315 /* NOTE: ALARM is read only, so not included here */
1316 i2c_smbus_write_byte_data(client, reg, value & 0xff);
1317 i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1318 break;
1319 default: /* Write BYTE data */
1320 i2c_smbus_write_byte_data(client, reg, value);
1321 break;
1322 }
1323 }
1324
1325 static struct lm85_data *lm85_update_device(struct device *dev)
1326 {
1327 struct i2c_client *client = to_i2c_client(dev);
1328 struct lm85_data *data = i2c_get_clientdata(client);
1329 int i;
1330
1331 mutex_lock(&data->update_lock);
1332
1333 if (!data->valid ||
1334 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1335 /* Things that change quickly */
1336 dev_dbg(&client->dev, "Reading sensor values\n");
1337
1338 /* Have to read extended bits first to "freeze" the
1339 * more significant bits that are read later.
1340 * There are 2 additional resolution bits per channel and we
1341 * have room for 4, so we shift them to the left.
1342 */
1343 if (data->type == adm1027 || data->type == adt7463) {
1344 int ext1 = lm85_read_value(client,
1345 ADM1027_REG_EXTEND_ADC1);
1346 int ext2 = lm85_read_value(client,
1347 ADM1027_REG_EXTEND_ADC2);
1348 int val = (ext1 << 8) + ext2;
1349
1350 for (i = 0; i <= 4; i++)
1351 data->in_ext[i] =
1352 ((val >> (i * 2)) & 0x03) << 2;
1353
1354 for (i = 0; i <= 2; i++)
1355 data->temp_ext[i] =
1356 (val >> ((i + 4) * 2)) & 0x0c;
1357 }
1358
1359 data->vid = lm85_read_value(client, LM85_REG_VID);
1360
1361 for (i = 0; i <= 3; ++i) {
1362 data->in[i] =
1363 lm85_read_value(client, LM85_REG_IN(i));
1364 data->fan[i] =
1365 lm85_read_value(client, LM85_REG_FAN(i));
1366 }
1367
1368 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1369 data->in[4] = lm85_read_value(client,
1370 LM85_REG_IN(4));
1371 }
1372
1373 for (i = 0; i <= 2; ++i) {
1374 data->temp[i] =
1375 lm85_read_value(client, LM85_REG_TEMP(i));
1376 data->pwm[i] =
1377 lm85_read_value(client, LM85_REG_PWM(i));
1378 }
1379
1380 data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1381
1382 if (data->type == emc6d100) {
1383 /* Three more voltage sensors */
1384 for (i = 5; i <= 7; ++i) {
1385 data->in[i] = lm85_read_value(client,
1386 EMC6D100_REG_IN(i));
1387 }
1388 /* More alarm bits */
1389 data->alarms |= lm85_read_value(client,
1390 EMC6D100_REG_ALARM3) << 16;
1391 } else if (data->type == emc6d102) {
1392 /* Have to read LSB bits after the MSB ones because
1393 the reading of the MSB bits has frozen the
1394 LSBs (backward from the ADM1027).
1395 */
1396 int ext1 = lm85_read_value(client,
1397 EMC6D102_REG_EXTEND_ADC1);
1398 int ext2 = lm85_read_value(client,
1399 EMC6D102_REG_EXTEND_ADC2);
1400 int ext3 = lm85_read_value(client,
1401 EMC6D102_REG_EXTEND_ADC3);
1402 int ext4 = lm85_read_value(client,
1403 EMC6D102_REG_EXTEND_ADC4);
1404 data->in_ext[0] = ext3 & 0x0f;
1405 data->in_ext[1] = ext4 & 0x0f;
1406 data->in_ext[2] = ext4 >> 4;
1407 data->in_ext[3] = ext3 >> 4;
1408 data->in_ext[4] = ext2 >> 4;
1409
1410 data->temp_ext[0] = ext1 & 0x0f;
1411 data->temp_ext[1] = ext2 & 0x0f;
1412 data->temp_ext[2] = ext1 >> 4;
1413 }
1414
1415 data->last_reading = jiffies;
1416 } /* last_reading */
1417
1418 if (!data->valid ||
1419 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1420 /* Things that don't change often */
1421 dev_dbg(&client->dev, "Reading config values\n");
1422
1423 for (i = 0; i <= 3; ++i) {
1424 data->in_min[i] =
1425 lm85_read_value(client, LM85_REG_IN_MIN(i));
1426 data->in_max[i] =
1427 lm85_read_value(client, LM85_REG_IN_MAX(i));
1428 data->fan_min[i] =
1429 lm85_read_value(client, LM85_REG_FAN_MIN(i));
1430 }
1431
1432 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1433 data->in_min[4] = lm85_read_value(client,
1434 LM85_REG_IN_MIN(4));
1435 data->in_max[4] = lm85_read_value(client,
1436 LM85_REG_IN_MAX(4));
1437 }
1438
1439 if (data->type == emc6d100) {
1440 for (i = 5; i <= 7; ++i) {
1441 data->in_min[i] = lm85_read_value(client,
1442 EMC6D100_REG_IN_MIN(i));
1443 data->in_max[i] = lm85_read_value(client,
1444 EMC6D100_REG_IN_MAX(i));
1445 }
1446 }
1447
1448 for (i = 0; i <= 2; ++i) {
1449 int val;
1450
1451 data->temp_min[i] =
1452 lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1453 data->temp_max[i] =
1454 lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1455
1456 data->autofan[i].config =
1457 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1458 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1459 data->pwm_freq[i] = val & 0x07;
1460 data->zone[i].range = val >> 4;
1461 data->autofan[i].min_pwm =
1462 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1463 data->zone[i].limit =
1464 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1465 data->zone[i].critical =
1466 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1467 }
1468
1469 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1470 data->autofan[0].min_off = (i & 0x20) != 0;
1471 data->autofan[1].min_off = (i & 0x40) != 0;
1472 data->autofan[2].min_off = (i & 0x80) != 0;
1473
1474 i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1475 data->zone[0].hyst = i >> 4;
1476 data->zone[1].hyst = i & 0x0f;
1477
1478 i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1479 data->zone[2].hyst = i >> 4;
1480
1481 data->last_config = jiffies;
1482 } /* last_config */
1483
1484 data->valid = 1;
1485
1486 mutex_unlock(&data->update_lock);
1487
1488 return data;
1489 }
1490
1491
1492 static int __init sm_lm85_init(void)
1493 {
1494 return i2c_add_driver(&lm85_driver);
1495 }
1496
1497 static void __exit sm_lm85_exit(void)
1498 {
1499 i2c_del_driver(&lm85_driver);
1500 }
1501
1502 MODULE_LICENSE("GPL");
1503 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1504 "Margit Schubert-While <margitsw@t-online.de>, "
1505 "Justin Thiessen <jthiessen@penguincomputing.com>");
1506 MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1507
1508 module_init(sm_lm85_init);
1509 module_exit(sm_lm85_exit);
Linux kernel - Deliverables
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