2 lm85.c - Part of lm_sensors, Linux kernel modules for hardware
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 Copyright (C) 2007--2009 Jean Delvare <khali@linux-fr.org>
10 Chip details at <http://www.national.com/ds/LM/LM85.pdf>
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/jiffies.h>
31 #include <linux/i2c.h>
32 #include <linux/hwmon.h>
33 #include <linux/hwmon-vid.h>
34 #include <linux/hwmon-sysfs.h>
35 #include <linux/err.h>
36 #include <linux/mutex.h>
38 /* Addresses to scan */
39 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
41 /* Insmod parameters */
42 I2C_CLIENT_INSMOD_7(lm85b, lm85c, adm1027, adt7463, adt7468, emc6d100,
45 /* The LM85 registers */
47 #define LM85_REG_IN(nr) (0x20 + (nr))
48 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2)
49 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2)
51 #define LM85_REG_TEMP(nr) (0x25 + (nr))
52 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2)
53 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2)
55 /* Fan speeds are LSB, MSB (2 bytes) */
56 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2)
57 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2)
59 #define LM85_REG_PWM(nr) (0x30 + (nr))
61 #define LM85_REG_COMPANY 0x3e
62 #define LM85_REG_VERSTEP 0x3f
64 #define ADT7468_REG_CFG5 0x7c
65 #define ADT7468_OFF64 0x01
66 #define IS_ADT7468_OFF64(data) \
67 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64))
69 /* These are the recognized values for the above regs */
70 #define LM85_COMPANY_NATIONAL 0x01
71 #define LM85_COMPANY_ANALOG_DEV 0x41
72 #define LM85_COMPANY_SMSC 0x5c
73 #define LM85_VERSTEP_VMASK 0xf0
74 #define LM85_VERSTEP_GENERIC 0x60
75 #define LM85_VERSTEP_GENERIC2 0x70
76 #define LM85_VERSTEP_LM85C 0x60
77 #define LM85_VERSTEP_LM85B 0x62
78 #define LM85_VERSTEP_LM96000_1 0x68
79 #define LM85_VERSTEP_LM96000_2 0x69
80 #define LM85_VERSTEP_ADM1027 0x60
81 #define LM85_VERSTEP_ADT7463 0x62
82 #define LM85_VERSTEP_ADT7463C 0x6A
83 #define LM85_VERSTEP_ADT7468_1 0x71
84 #define LM85_VERSTEP_ADT7468_2 0x72
85 #define LM85_VERSTEP_EMC6D100_A0 0x60
86 #define LM85_VERSTEP_EMC6D100_A1 0x61
87 #define LM85_VERSTEP_EMC6D102 0x65
89 #define LM85_REG_CONFIG 0x40
91 #define LM85_REG_ALARM1 0x41
92 #define LM85_REG_ALARM2 0x42
94 #define LM85_REG_VID 0x43
96 /* Automated FAN control */
97 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr))
98 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr))
99 #define LM85_REG_AFAN_SPIKE1 0x62
100 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr))
101 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr))
102 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr))
103 #define LM85_REG_AFAN_HYST1 0x6d
104 #define LM85_REG_AFAN_HYST2 0x6e
106 #define ADM1027_REG_EXTEND_ADC1 0x76
107 #define ADM1027_REG_EXTEND_ADC2 0x77
109 #define EMC6D100_REG_ALARM3 0x7d
110 /* IN5, IN6 and IN7 */
111 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5))
112 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2)
113 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2)
114 #define EMC6D102_REG_EXTEND_ADC1 0x85
115 #define EMC6D102_REG_EXTEND_ADC2 0x86
116 #define EMC6D102_REG_EXTEND_ADC3 0x87
117 #define EMC6D102_REG_EXTEND_ADC4 0x88
120 /* Conversions. Rounding and limit checking is only done on the TO_REG
121 variants. Note that you should be a bit careful with which arguments
122 these macros are called: arguments may be evaluated more than once.
125 /* IN are scaled acording to built-in resistors */
126 static const int lm85_scaling[] = { /* .001 Volts */
127 2500, 2250, 3300, 5000, 12000,
128 3300, 1500, 1800 /*EMC6D100*/
130 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
132 #define INS_TO_REG(n, val) \
133 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255)
135 #define INSEXT_FROM_REG(n, val, ext) \
136 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])
138 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n])
140 /* FAN speed is measured using 90kHz clock */
141 static inline u16 FAN_TO_REG(unsigned long val)
145 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe);
147 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
150 /* Temperature is reported in .001 degC increments */
151 #define TEMP_TO_REG(val) \
152 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127)
153 #define TEMPEXT_FROM_REG(val, ext) \
154 SCALE(((val) << 4) + (ext), 16, 1000)
155 #define TEMP_FROM_REG(val) ((val) * 1000)
157 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255)
158 #define PWM_FROM_REG(val) (val)
161 /* ZONEs have the following parameters:
162 * Limit (low) temp, 1. degC
163 * Hysteresis (below limit), 1. degC (0-15)
164 * Range of speed control, .1 degC (2-80)
165 * Critical (high) temp, 1. degC
167 * FAN PWMs have the following parameters:
168 * Reference Zone, 1, 2, 3, etc.
169 * Spinup time, .05 sec
170 * PWM value at limit/low temp, 1 count
171 * PWM Frequency, 1. Hz
172 * PWM is Min or OFF below limit, flag
173 * Invert PWM output, flag
175 * Some chips filter the temp, others the fan.
176 * Filter constant (or disabled) .1 seconds
179 /* These are the zone temperature range encodings in .001 degree C */
180 static const int lm85_range_map[] = {
181 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
182 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
185 static int RANGE_TO_REG(int range)
189 /* Find the closest match */
190 for (i = 0; i < 15; ++i) {
191 if (range <= (lm85_range_map[i] + lm85_range_map[i + 1]) / 2)
197 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
199 /* These are the PWM frequency encodings */
200 static const int lm85_freq_map[8] = { /* 1 Hz */
201 10, 15, 23, 30, 38, 47, 61, 94
203 static const int adm1027_freq_map[8] = { /* 1 Hz */
204 11, 15, 22, 29, 35, 44, 59, 88
207 static int FREQ_TO_REG(const int *map, int freq)
211 /* Find the closest match */
212 for (i = 0; i < 7; ++i)
213 if (freq <= (map[i] + map[i + 1]) / 2)
218 static int FREQ_FROM_REG(const int *map, u8 reg)
220 return map[reg & 0x07];
223 /* Since we can't use strings, I'm abusing these numbers
224 * to stand in for the following meanings:
225 * 1 -- PWM responds to Zone 1
226 * 2 -- PWM responds to Zone 2
227 * 3 -- PWM responds to Zone 3
228 * 23 -- PWM responds to the higher temp of Zone 2 or 3
229 * 123 -- PWM responds to highest of Zone 1, 2, or 3
230 * 0 -- PWM is always at 0% (ie, off)
231 * -1 -- PWM is always at 100%
232 * -2 -- PWM responds to manual control
235 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
236 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5]
238 static int ZONE_TO_REG(int zone)
242 for (i = 0; i <= 7; ++i)
243 if (zone == lm85_zone_map[i])
245 if (i > 7) /* Not found. */
246 i = 3; /* Always 100% */
250 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15)
251 #define HYST_FROM_REG(val) ((val) * 1000)
253 /* Chip sampling rates
255 * Some sensors are not updated more frequently than once per second
256 * so it doesn't make sense to read them more often than that.
257 * We cache the results and return the saved data if the driver
258 * is called again before a second has elapsed.
260 * Also, there is significant configuration data for this chip
261 * given the automatic PWM fan control that is possible. There
262 * are about 47 bytes of config data to only 22 bytes of actual
263 * readings. So, we keep the config data up to date in the cache
264 * when it is written and only sample it once every 1 *minute*
266 #define LM85_DATA_INTERVAL (HZ + HZ / 2)
267 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ)
269 /* LM85 can automatically adjust fan speeds based on temperature
270 * This structure encapsulates an entire Zone config. There are
271 * three zones (one for each temperature input) on the lm85
274 s8 limit; /* Low temp limit */
275 u8 hyst; /* Low limit hysteresis. (0-15) */
276 u8 range; /* Temp range, encoded */
277 s8 critical; /* "All fans ON" temp limit */
278 u8 off_desired; /* Actual "off" temperature specified. Preserved
279 * to prevent "drift" as other autofan control
282 u8 max_desired; /* Actual "max" temperature specified. Preserved
283 * to prevent "drift" as other autofan control
288 struct lm85_autofan {
289 u8 config; /* Register value */
290 u8 min_pwm; /* Minimum PWM value, encoded */
291 u8 min_off; /* Min PWM or OFF below "limit", flag */
294 /* For each registered chip, we need to keep some data in memory.
295 The structure is dynamically allocated. */
297 struct device *hwmon_dev;
301 struct mutex update_lock;
302 int valid; /* !=0 if following fields are valid */
303 unsigned long last_reading; /* In jiffies */
304 unsigned long last_config; /* In jiffies */
306 u8 in[8]; /* Register value */
307 u8 in_max[8]; /* Register value */
308 u8 in_min[8]; /* Register value */
309 s8 temp[3]; /* Register value */
310 s8 temp_min[3]; /* Register value */
311 s8 temp_max[3]; /* Register value */
312 u16 fan[4]; /* Register value */
313 u16 fan_min[4]; /* Register value */
314 u8 pwm[3]; /* Register value */
315 u8 pwm_freq[3]; /* Register encoding */
316 u8 temp_ext[3]; /* Decoded values */
317 u8 in_ext[8]; /* Decoded values */
318 u8 vid; /* Register value */
319 u8 vrm; /* VRM version */
320 u32 alarms; /* Register encoding, combined */
321 u8 cfg5; /* Config Register 5 on ADT7468 */
322 struct lm85_autofan autofan[3];
323 struct lm85_zone zone[3];
326 static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info);
327 static int lm85_probe(struct i2c_client *client,
328 const struct i2c_device_id *id);
329 static int lm85_remove(struct i2c_client *client);
331 static int lm85_read_value(struct i2c_client *client, u8 reg);
332 static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
333 static struct lm85_data *lm85_update_device(struct device *dev);
336 static const struct i2c_device_id lm85_id[] = {
337 { "adm1027", adm1027 },
338 { "adt7463", adt7463 },
339 { "adt7468", adt7468 },
340 { "lm85", any_chip },
343 { "emc6d100", emc6d100 },
344 { "emc6d101", emc6d100 },
345 { "emc6d102", emc6d102 },
348 MODULE_DEVICE_TABLE(i2c, lm85_id);
350 static struct i2c_driver lm85_driver = {
351 .class = I2C_CLASS_HWMON,
356 .remove = lm85_remove,
358 .detect = lm85_detect,
359 .address_data = &addr_data,
364 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
367 int nr = to_sensor_dev_attr(attr)->index;
368 struct lm85_data *data = lm85_update_device(dev);
369 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
372 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
375 int nr = to_sensor_dev_attr(attr)->index;
376 struct lm85_data *data = lm85_update_device(dev);
377 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr]));
380 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
381 const char *buf, size_t count)
383 int nr = to_sensor_dev_attr(attr)->index;
384 struct i2c_client *client = to_i2c_client(dev);
385 struct lm85_data *data = i2c_get_clientdata(client);
386 unsigned long val = simple_strtoul(buf, NULL, 10);
388 mutex_lock(&data->update_lock);
389 data->fan_min[nr] = FAN_TO_REG(val);
390 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
391 mutex_unlock(&data->update_lock);
395 #define show_fan_offset(offset) \
396 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
397 show_fan, NULL, offset - 1); \
398 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
399 show_fan_min, set_fan_min, offset - 1)
406 /* vid, vrm, alarms */
408 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
411 struct lm85_data *data = lm85_update_device(dev);
414 if ((data->type == adt7463 || data->type == adt7468) &&
415 (data->vid & 0x80)) {
416 /* 6-pin VID (VRM 10) */
417 vid = vid_from_reg(data->vid & 0x3f, data->vrm);
419 /* 5-pin VID (VRM 9) */
420 vid = vid_from_reg(data->vid & 0x1f, data->vrm);
423 return sprintf(buf, "%d\n", vid);
426 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
428 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
431 struct lm85_data *data = dev_get_drvdata(dev);
432 return sprintf(buf, "%ld\n", (long) data->vrm);
435 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
436 const char *buf, size_t count)
438 struct lm85_data *data = dev_get_drvdata(dev);
439 data->vrm = simple_strtoul(buf, NULL, 10);
443 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
445 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
448 struct lm85_data *data = lm85_update_device(dev);
449 return sprintf(buf, "%u\n", data->alarms);
452 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
454 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
457 int nr = to_sensor_dev_attr(attr)->index;
458 struct lm85_data *data = lm85_update_device(dev);
459 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
462 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
463 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
464 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
465 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
466 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
467 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
468 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
469 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
470 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
471 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
472 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
473 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
474 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
475 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
476 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
477 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
478 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
482 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
485 int nr = to_sensor_dev_attr(attr)->index;
486 struct lm85_data *data = lm85_update_device(dev);
487 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
490 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
491 const char *buf, size_t count)
493 int nr = to_sensor_dev_attr(attr)->index;
494 struct i2c_client *client = to_i2c_client(dev);
495 struct lm85_data *data = i2c_get_clientdata(client);
496 long val = simple_strtol(buf, NULL, 10);
498 mutex_lock(&data->update_lock);
499 data->pwm[nr] = PWM_TO_REG(val);
500 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
501 mutex_unlock(&data->update_lock);
505 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
508 int nr = to_sensor_dev_attr(attr)->index;
509 struct lm85_data *data = lm85_update_device(dev);
510 int pwm_zone, enable;
512 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
514 case -1: /* PWM is always at 100% */
517 case 0: /* PWM is always at 0% */
518 case -2: /* PWM responds to manual control */
521 default: /* PWM in automatic mode */
524 return sprintf(buf, "%d\n", enable);
527 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
528 *attr, const char *buf, size_t count)
530 int nr = to_sensor_dev_attr(attr)->index;
531 struct i2c_client *client = to_i2c_client(dev);
532 struct lm85_data *data = i2c_get_clientdata(client);
533 long val = simple_strtol(buf, NULL, 10);
544 /* Here we have to choose arbitrarily one of the 5 possible
545 configurations; I go for the safest */
552 mutex_lock(&data->update_lock);
553 data->autofan[nr].config = lm85_read_value(client,
554 LM85_REG_AFAN_CONFIG(nr));
555 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
557 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
558 data->autofan[nr].config);
559 mutex_unlock(&data->update_lock);
563 static ssize_t show_pwm_freq(struct device *dev,
564 struct device_attribute *attr, char *buf)
566 int nr = to_sensor_dev_attr(attr)->index;
567 struct lm85_data *data = lm85_update_device(dev);
568 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map,
569 data->pwm_freq[nr]));
572 static ssize_t set_pwm_freq(struct device *dev,
573 struct device_attribute *attr, const char *buf, size_t count)
575 int nr = to_sensor_dev_attr(attr)->index;
576 struct i2c_client *client = to_i2c_client(dev);
577 struct lm85_data *data = i2c_get_clientdata(client);
578 long val = simple_strtol(buf, NULL, 10);
580 mutex_lock(&data->update_lock);
581 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
582 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
583 (data->zone[nr].range << 4)
584 | data->pwm_freq[nr]);
585 mutex_unlock(&data->update_lock);
589 #define show_pwm_reg(offset) \
590 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
591 show_pwm, set_pwm, offset - 1); \
592 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
593 show_pwm_enable, set_pwm_enable, offset - 1); \
594 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
595 show_pwm_freq, set_pwm_freq, offset - 1)
603 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
606 int nr = to_sensor_dev_attr(attr)->index;
607 struct lm85_data *data = lm85_update_device(dev);
608 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
612 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
615 int nr = to_sensor_dev_attr(attr)->index;
616 struct lm85_data *data = lm85_update_device(dev);
617 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
620 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
621 const char *buf, size_t count)
623 int nr = to_sensor_dev_attr(attr)->index;
624 struct i2c_client *client = to_i2c_client(dev);
625 struct lm85_data *data = i2c_get_clientdata(client);
626 long val = simple_strtol(buf, NULL, 10);
628 mutex_lock(&data->update_lock);
629 data->in_min[nr] = INS_TO_REG(nr, val);
630 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
631 mutex_unlock(&data->update_lock);
635 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
638 int nr = to_sensor_dev_attr(attr)->index;
639 struct lm85_data *data = lm85_update_device(dev);
640 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
643 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
644 const char *buf, size_t count)
646 int nr = to_sensor_dev_attr(attr)->index;
647 struct i2c_client *client = to_i2c_client(dev);
648 struct lm85_data *data = i2c_get_clientdata(client);
649 long val = simple_strtol(buf, NULL, 10);
651 mutex_lock(&data->update_lock);
652 data->in_max[nr] = INS_TO_REG(nr, val);
653 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
654 mutex_unlock(&data->update_lock);
658 #define show_in_reg(offset) \
659 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
660 show_in, NULL, offset); \
661 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
662 show_in_min, set_in_min, offset); \
663 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
664 show_in_max, set_in_max, offset)
677 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
680 int nr = to_sensor_dev_attr(attr)->index;
681 struct lm85_data *data = lm85_update_device(dev);
682 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
683 data->temp_ext[nr]));
686 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
689 int nr = to_sensor_dev_attr(attr)->index;
690 struct lm85_data *data = lm85_update_device(dev);
691 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
694 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
695 const char *buf, size_t count)
697 int nr = to_sensor_dev_attr(attr)->index;
698 struct i2c_client *client = to_i2c_client(dev);
699 struct lm85_data *data = i2c_get_clientdata(client);
700 long val = simple_strtol(buf, NULL, 10);
702 if (IS_ADT7468_OFF64(data))
705 mutex_lock(&data->update_lock);
706 data->temp_min[nr] = TEMP_TO_REG(val);
707 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
708 mutex_unlock(&data->update_lock);
712 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
715 int nr = to_sensor_dev_attr(attr)->index;
716 struct lm85_data *data = lm85_update_device(dev);
717 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
720 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
721 const char *buf, size_t count)
723 int nr = to_sensor_dev_attr(attr)->index;
724 struct i2c_client *client = to_i2c_client(dev);
725 struct lm85_data *data = i2c_get_clientdata(client);
726 long val = simple_strtol(buf, NULL, 10);
728 if (IS_ADT7468_OFF64(data))
731 mutex_lock(&data->update_lock);
732 data->temp_max[nr] = TEMP_TO_REG(val);
733 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
734 mutex_unlock(&data->update_lock);
738 #define show_temp_reg(offset) \
739 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
740 show_temp, NULL, offset - 1); \
741 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
742 show_temp_min, set_temp_min, offset - 1); \
743 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
744 show_temp_max, set_temp_max, offset - 1);
751 /* Automatic PWM control */
753 static ssize_t show_pwm_auto_channels(struct device *dev,
754 struct device_attribute *attr, char *buf)
756 int nr = to_sensor_dev_attr(attr)->index;
757 struct lm85_data *data = lm85_update_device(dev);
758 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
761 static ssize_t set_pwm_auto_channels(struct device *dev,
762 struct device_attribute *attr, const char *buf, size_t count)
764 int nr = to_sensor_dev_attr(attr)->index;
765 struct i2c_client *client = to_i2c_client(dev);
766 struct lm85_data *data = i2c_get_clientdata(client);
767 long val = simple_strtol(buf, NULL, 10);
769 mutex_lock(&data->update_lock);
770 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
772 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
773 data->autofan[nr].config);
774 mutex_unlock(&data->update_lock);
778 static ssize_t show_pwm_auto_pwm_min(struct device *dev,
779 struct device_attribute *attr, char *buf)
781 int nr = to_sensor_dev_attr(attr)->index;
782 struct lm85_data *data = lm85_update_device(dev);
783 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
786 static ssize_t set_pwm_auto_pwm_min(struct device *dev,
787 struct device_attribute *attr, const char *buf, size_t count)
789 int nr = to_sensor_dev_attr(attr)->index;
790 struct i2c_client *client = to_i2c_client(dev);
791 struct lm85_data *data = i2c_get_clientdata(client);
792 long val = simple_strtol(buf, NULL, 10);
794 mutex_lock(&data->update_lock);
795 data->autofan[nr].min_pwm = PWM_TO_REG(val);
796 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
797 data->autofan[nr].min_pwm);
798 mutex_unlock(&data->update_lock);
802 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
803 struct device_attribute *attr, char *buf)
805 int nr = to_sensor_dev_attr(attr)->index;
806 struct lm85_data *data = lm85_update_device(dev);
807 return sprintf(buf, "%d\n", data->autofan[nr].min_off);
810 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
811 struct device_attribute *attr, const char *buf, size_t count)
813 int nr = to_sensor_dev_attr(attr)->index;
814 struct i2c_client *client = to_i2c_client(dev);
815 struct lm85_data *data = i2c_get_clientdata(client);
816 long val = simple_strtol(buf, NULL, 10);
819 mutex_lock(&data->update_lock);
820 data->autofan[nr].min_off = val;
821 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
822 tmp &= ~(0x20 << nr);
823 if (data->autofan[nr].min_off)
825 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
826 mutex_unlock(&data->update_lock);
830 #define pwm_auto(offset) \
831 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
832 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
833 set_pwm_auto_channels, offset - 1); \
834 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
835 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \
836 set_pwm_auto_pwm_min, offset - 1); \
837 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
838 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
839 set_pwm_auto_pwm_minctl, offset - 1)
845 /* Temperature settings for automatic PWM control */
847 static ssize_t show_temp_auto_temp_off(struct device *dev,
848 struct device_attribute *attr, char *buf)
850 int nr = to_sensor_dev_attr(attr)->index;
851 struct lm85_data *data = lm85_update_device(dev);
852 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
853 HYST_FROM_REG(data->zone[nr].hyst));
856 static ssize_t set_temp_auto_temp_off(struct device *dev,
857 struct device_attribute *attr, const char *buf, size_t count)
859 int nr = to_sensor_dev_attr(attr)->index;
860 struct i2c_client *client = to_i2c_client(dev);
861 struct lm85_data *data = i2c_get_clientdata(client);
863 long val = simple_strtol(buf, NULL, 10);
865 mutex_lock(&data->update_lock);
866 min = TEMP_FROM_REG(data->zone[nr].limit);
867 data->zone[nr].off_desired = TEMP_TO_REG(val);
868 data->zone[nr].hyst = HYST_TO_REG(min - val);
869 if (nr == 0 || nr == 1) {
870 lm85_write_value(client, LM85_REG_AFAN_HYST1,
871 (data->zone[0].hyst << 4)
872 | data->zone[1].hyst);
874 lm85_write_value(client, LM85_REG_AFAN_HYST2,
875 (data->zone[2].hyst << 4));
877 mutex_unlock(&data->update_lock);
881 static ssize_t show_temp_auto_temp_min(struct device *dev,
882 struct device_attribute *attr, char *buf)
884 int nr = to_sensor_dev_attr(attr)->index;
885 struct lm85_data *data = lm85_update_device(dev);
886 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
889 static ssize_t set_temp_auto_temp_min(struct device *dev,
890 struct device_attribute *attr, const char *buf, size_t count)
892 int nr = to_sensor_dev_attr(attr)->index;
893 struct i2c_client *client = to_i2c_client(dev);
894 struct lm85_data *data = i2c_get_clientdata(client);
895 long val = simple_strtol(buf, NULL, 10);
897 mutex_lock(&data->update_lock);
898 data->zone[nr].limit = TEMP_TO_REG(val);
899 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
900 data->zone[nr].limit);
902 /* Update temp_auto_max and temp_auto_range */
903 data->zone[nr].range = RANGE_TO_REG(
904 TEMP_FROM_REG(data->zone[nr].max_desired) -
905 TEMP_FROM_REG(data->zone[nr].limit));
906 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
907 ((data->zone[nr].range & 0x0f) << 4)
908 | (data->pwm_freq[nr] & 0x07));
910 /* Update temp_auto_hyst and temp_auto_off */
911 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
912 data->zone[nr].limit) - TEMP_FROM_REG(
913 data->zone[nr].off_desired));
914 if (nr == 0 || nr == 1) {
915 lm85_write_value(client, LM85_REG_AFAN_HYST1,
916 (data->zone[0].hyst << 4)
917 | data->zone[1].hyst);
919 lm85_write_value(client, LM85_REG_AFAN_HYST2,
920 (data->zone[2].hyst << 4));
922 mutex_unlock(&data->update_lock);
926 static ssize_t show_temp_auto_temp_max(struct device *dev,
927 struct device_attribute *attr, char *buf)
929 int nr = to_sensor_dev_attr(attr)->index;
930 struct lm85_data *data = lm85_update_device(dev);
931 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
932 RANGE_FROM_REG(data->zone[nr].range));
935 static ssize_t set_temp_auto_temp_max(struct device *dev,
936 struct device_attribute *attr, const char *buf, size_t count)
938 int nr = to_sensor_dev_attr(attr)->index;
939 struct i2c_client *client = to_i2c_client(dev);
940 struct lm85_data *data = i2c_get_clientdata(client);
942 long val = simple_strtol(buf, NULL, 10);
944 mutex_lock(&data->update_lock);
945 min = TEMP_FROM_REG(data->zone[nr].limit);
946 data->zone[nr].max_desired = TEMP_TO_REG(val);
947 data->zone[nr].range = RANGE_TO_REG(
949 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
950 ((data->zone[nr].range & 0x0f) << 4)
951 | (data->pwm_freq[nr] & 0x07));
952 mutex_unlock(&data->update_lock);
956 static ssize_t show_temp_auto_temp_crit(struct device *dev,
957 struct device_attribute *attr, char *buf)
959 int nr = to_sensor_dev_attr(attr)->index;
960 struct lm85_data *data = lm85_update_device(dev);
961 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
964 static ssize_t set_temp_auto_temp_crit(struct device *dev,
965 struct device_attribute *attr, const char *buf, size_t count)
967 int nr = to_sensor_dev_attr(attr)->index;
968 struct i2c_client *client = to_i2c_client(dev);
969 struct lm85_data *data = i2c_get_clientdata(client);
970 long val = simple_strtol(buf, NULL, 10);
972 mutex_lock(&data->update_lock);
973 data->zone[nr].critical = TEMP_TO_REG(val);
974 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
975 data->zone[nr].critical);
976 mutex_unlock(&data->update_lock);
980 #define temp_auto(offset) \
981 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \
982 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \
983 set_temp_auto_temp_off, offset - 1); \
984 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \
985 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \
986 set_temp_auto_temp_min, offset - 1); \
987 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \
988 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \
989 set_temp_auto_temp_max, offset - 1); \
990 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \
991 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \
992 set_temp_auto_temp_crit, offset - 1);
998 static struct attribute *lm85_attributes[] = {
999 &sensor_dev_attr_fan1_input.dev_attr.attr,
1000 &sensor_dev_attr_fan2_input.dev_attr.attr,
1001 &sensor_dev_attr_fan3_input.dev_attr.attr,
1002 &sensor_dev_attr_fan4_input.dev_attr.attr,
1003 &sensor_dev_attr_fan1_min.dev_attr.attr,
1004 &sensor_dev_attr_fan2_min.dev_attr.attr,
1005 &sensor_dev_attr_fan3_min.dev_attr.attr,
1006 &sensor_dev_attr_fan4_min.dev_attr.attr,
1007 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1008 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1009 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1010 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1012 &sensor_dev_attr_pwm1.dev_attr.attr,
1013 &sensor_dev_attr_pwm2.dev_attr.attr,
1014 &sensor_dev_attr_pwm3.dev_attr.attr,
1015 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1016 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1017 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1018 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1019 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1020 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1022 &sensor_dev_attr_in0_input.dev_attr.attr,
1023 &sensor_dev_attr_in1_input.dev_attr.attr,
1024 &sensor_dev_attr_in2_input.dev_attr.attr,
1025 &sensor_dev_attr_in3_input.dev_attr.attr,
1026 &sensor_dev_attr_in0_min.dev_attr.attr,
1027 &sensor_dev_attr_in1_min.dev_attr.attr,
1028 &sensor_dev_attr_in2_min.dev_attr.attr,
1029 &sensor_dev_attr_in3_min.dev_attr.attr,
1030 &sensor_dev_attr_in0_max.dev_attr.attr,
1031 &sensor_dev_attr_in1_max.dev_attr.attr,
1032 &sensor_dev_attr_in2_max.dev_attr.attr,
1033 &sensor_dev_attr_in3_max.dev_attr.attr,
1034 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1035 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1036 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1037 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1039 &sensor_dev_attr_temp1_input.dev_attr.attr,
1040 &sensor_dev_attr_temp2_input.dev_attr.attr,
1041 &sensor_dev_attr_temp3_input.dev_attr.attr,
1042 &sensor_dev_attr_temp1_min.dev_attr.attr,
1043 &sensor_dev_attr_temp2_min.dev_attr.attr,
1044 &sensor_dev_attr_temp3_min.dev_attr.attr,
1045 &sensor_dev_attr_temp1_max.dev_attr.attr,
1046 &sensor_dev_attr_temp2_max.dev_attr.attr,
1047 &sensor_dev_attr_temp3_max.dev_attr.attr,
1048 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1049 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1050 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1051 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1052 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1054 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1055 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1056 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1057 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1058 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1059 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1060 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1061 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1062 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1064 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1065 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1066 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1067 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1068 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1069 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1070 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1071 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1072 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1073 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1074 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1075 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1078 &dev_attr_cpu0_vid.attr,
1079 &dev_attr_alarms.attr,
1083 static const struct attribute_group lm85_group = {
1084 .attrs = lm85_attributes,
1087 static struct attribute *lm85_attributes_in4[] = {
1088 &sensor_dev_attr_in4_input.dev_attr.attr,
1089 &sensor_dev_attr_in4_min.dev_attr.attr,
1090 &sensor_dev_attr_in4_max.dev_attr.attr,
1091 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1095 static const struct attribute_group lm85_group_in4 = {
1096 .attrs = lm85_attributes_in4,
1099 static struct attribute *lm85_attributes_in567[] = {
1100 &sensor_dev_attr_in5_input.dev_attr.attr,
1101 &sensor_dev_attr_in6_input.dev_attr.attr,
1102 &sensor_dev_attr_in7_input.dev_attr.attr,
1103 &sensor_dev_attr_in5_min.dev_attr.attr,
1104 &sensor_dev_attr_in6_min.dev_attr.attr,
1105 &sensor_dev_attr_in7_min.dev_attr.attr,
1106 &sensor_dev_attr_in5_max.dev_attr.attr,
1107 &sensor_dev_attr_in6_max.dev_attr.attr,
1108 &sensor_dev_attr_in7_max.dev_attr.attr,
1109 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1110 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1111 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1115 static const struct attribute_group lm85_group_in567 = {
1116 .attrs = lm85_attributes_in567,
1119 static void lm85_init_client(struct i2c_client *client)
1123 /* Start monitoring if needed */
1124 value = lm85_read_value(client, LM85_REG_CONFIG);
1125 if (!(value & 0x01)) {
1126 dev_info(&client->dev, "Starting monitoring\n");
1127 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1130 /* Warn about unusual configuration bits */
1132 dev_warn(&client->dev, "Device configuration is locked\n");
1133 if (!(value & 0x04))
1134 dev_warn(&client->dev, "Device is not ready\n");
1137 static int lm85_is_fake(struct i2c_client *client)
1140 * Differenciate between real LM96000 and Winbond WPCD377I. The latter
1141 * emulate the former except that it has no hardware monitoring function
1142 * so the readings are always 0.
1147 for (i = 0; i < 8; i++) {
1148 in_temp = i2c_smbus_read_byte_data(client, 0x20 + i);
1149 fan = i2c_smbus_read_byte_data(client, 0x28 + i);
1150 if (in_temp != 0x00 || fan != 0xff)
1157 /* Return 0 if detection is successful, -ENODEV otherwise */
1158 static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)
1160 struct i2c_adapter *adapter = client->adapter;
1161 int address = client->addr;
1162 const char *type_name;
1163 int company, verstep;
1165 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1166 /* We need to be able to do byte I/O */
1170 /* Determine the chip type */
1171 company = lm85_read_value(client, LM85_REG_COMPANY);
1172 verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1174 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1175 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1176 address, company, verstep);
1178 /* All supported chips have the version in common */
1179 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC &&
1180 (verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC2) {
1181 dev_dbg(&adapter->dev,
1182 "Autodetection failed: unsupported version\n");
1187 /* Now, refine the detection */
1188 if (company == LM85_COMPANY_NATIONAL) {
1190 case LM85_VERSTEP_LM85C:
1191 type_name = "lm85c";
1193 case LM85_VERSTEP_LM85B:
1194 type_name = "lm85b";
1196 case LM85_VERSTEP_LM96000_1:
1197 case LM85_VERSTEP_LM96000_2:
1198 /* Check for Winbond WPCD377I */
1199 if (lm85_is_fake(client)) {
1200 dev_dbg(&adapter->dev,
1201 "Found Winbond WPCD377I, ignoring\n");
1206 } else if (company == LM85_COMPANY_ANALOG_DEV) {
1208 case LM85_VERSTEP_ADM1027:
1209 type_name = "adm1027";
1211 case LM85_VERSTEP_ADT7463:
1212 case LM85_VERSTEP_ADT7463C:
1213 type_name = "adt7463";
1215 case LM85_VERSTEP_ADT7468_1:
1216 case LM85_VERSTEP_ADT7468_2:
1217 type_name = "adt7468";
1220 } else if (company == LM85_COMPANY_SMSC) {
1222 case LM85_VERSTEP_EMC6D100_A0:
1223 case LM85_VERSTEP_EMC6D100_A1:
1224 /* Note: we can't tell a '100 from a '101 */
1225 type_name = "emc6d100";
1227 case LM85_VERSTEP_EMC6D102:
1228 type_name = "emc6d102";
1232 dev_dbg(&adapter->dev,
1233 "Autodetection failed: unknown vendor\n");
1237 strlcpy(info->type, type_name, I2C_NAME_SIZE);
1242 static int lm85_probe(struct i2c_client *client,
1243 const struct i2c_device_id *id)
1245 struct lm85_data *data;
1248 data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL);
1252 i2c_set_clientdata(client, data);
1253 data->type = id->driver_data;
1254 mutex_init(&data->update_lock);
1256 /* Fill in the chip specific driver values */
1257 switch (data->type) {
1262 data->freq_map = adm1027_freq_map;
1265 data->freq_map = lm85_freq_map;
1268 /* Set the VRM version */
1269 data->vrm = vid_which_vrm();
1271 /* Initialize the LM85 chip */
1272 lm85_init_client(client);
1274 /* Register sysfs hooks */
1275 err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1279 /* The ADT7463/68 have an optional VRM 10 mode where pin 21 is used
1280 as a sixth digital VID input rather than an analog input. */
1281 data->vid = lm85_read_value(client, LM85_REG_VID);
1282 if (!((data->type == adt7463 || data->type == adt7468) &&
1283 (data->vid & 0x80)))
1284 if ((err = sysfs_create_group(&client->dev.kobj,
1286 goto err_remove_files;
1288 /* The EMC6D100 has 3 additional voltage inputs */
1289 if (data->type == emc6d100)
1290 if ((err = sysfs_create_group(&client->dev.kobj,
1291 &lm85_group_in567)))
1292 goto err_remove_files;
1294 data->hwmon_dev = hwmon_device_register(&client->dev);
1295 if (IS_ERR(data->hwmon_dev)) {
1296 err = PTR_ERR(data->hwmon_dev);
1297 goto err_remove_files;
1302 /* Error out and cleanup code */
1304 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1305 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1306 if (data->type == emc6d100)
1307 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1313 static int lm85_remove(struct i2c_client *client)
1315 struct lm85_data *data = i2c_get_clientdata(client);
1316 hwmon_device_unregister(data->hwmon_dev);
1317 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1318 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1319 if (data->type == emc6d100)
1320 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1326 static int lm85_read_value(struct i2c_client *client, u8 reg)
1330 /* What size location is it? */
1332 case LM85_REG_FAN(0): /* Read WORD data */
1333 case LM85_REG_FAN(1):
1334 case LM85_REG_FAN(2):
1335 case LM85_REG_FAN(3):
1336 case LM85_REG_FAN_MIN(0):
1337 case LM85_REG_FAN_MIN(1):
1338 case LM85_REG_FAN_MIN(2):
1339 case LM85_REG_FAN_MIN(3):
1340 case LM85_REG_ALARM1: /* Read both bytes at once */
1341 res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1342 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1344 default: /* Read BYTE data */
1345 res = i2c_smbus_read_byte_data(client, reg);
1352 static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1355 case LM85_REG_FAN(0): /* Write WORD data */
1356 case LM85_REG_FAN(1):
1357 case LM85_REG_FAN(2):
1358 case LM85_REG_FAN(3):
1359 case LM85_REG_FAN_MIN(0):
1360 case LM85_REG_FAN_MIN(1):
1361 case LM85_REG_FAN_MIN(2):
1362 case LM85_REG_FAN_MIN(3):
1363 /* NOTE: ALARM is read only, so not included here */
1364 i2c_smbus_write_byte_data(client, reg, value & 0xff);
1365 i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1367 default: /* Write BYTE data */
1368 i2c_smbus_write_byte_data(client, reg, value);
1373 static struct lm85_data *lm85_update_device(struct device *dev)
1375 struct i2c_client *client = to_i2c_client(dev);
1376 struct lm85_data *data = i2c_get_clientdata(client);
1379 mutex_lock(&data->update_lock);
1382 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1383 /* Things that change quickly */
1384 dev_dbg(&client->dev, "Reading sensor values\n");
1386 /* Have to read extended bits first to "freeze" the
1387 * more significant bits that are read later.
1388 * There are 2 additional resolution bits per channel and we
1389 * have room for 4, so we shift them to the left.
1391 if (data->type == adm1027 || data->type == adt7463 ||
1392 data->type == adt7468) {
1393 int ext1 = lm85_read_value(client,
1394 ADM1027_REG_EXTEND_ADC1);
1395 int ext2 = lm85_read_value(client,
1396 ADM1027_REG_EXTEND_ADC2);
1397 int val = (ext1 << 8) + ext2;
1399 for (i = 0; i <= 4; i++)
1401 ((val >> (i * 2)) & 0x03) << 2;
1403 for (i = 0; i <= 2; i++)
1405 (val >> ((i + 4) * 2)) & 0x0c;
1408 data->vid = lm85_read_value(client, LM85_REG_VID);
1410 for (i = 0; i <= 3; ++i) {
1412 lm85_read_value(client, LM85_REG_IN(i));
1414 lm85_read_value(client, LM85_REG_FAN(i));
1417 if (!((data->type == adt7463 || data->type == adt7468) &&
1418 (data->vid & 0x80))) {
1419 data->in[4] = lm85_read_value(client,
1423 if (data->type == adt7468)
1424 data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5);
1426 for (i = 0; i <= 2; ++i) {
1428 lm85_read_value(client, LM85_REG_TEMP(i));
1430 lm85_read_value(client, LM85_REG_PWM(i));
1432 if (IS_ADT7468_OFF64(data))
1433 data->temp[i] -= 64;
1436 data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1438 if (data->type == emc6d100) {
1439 /* Three more voltage sensors */
1440 for (i = 5; i <= 7; ++i) {
1441 data->in[i] = lm85_read_value(client,
1442 EMC6D100_REG_IN(i));
1444 /* More alarm bits */
1445 data->alarms |= lm85_read_value(client,
1446 EMC6D100_REG_ALARM3) << 16;
1447 } else if (data->type == emc6d102) {
1448 /* Have to read LSB bits after the MSB ones because
1449 the reading of the MSB bits has frozen the
1450 LSBs (backward from the ADM1027).
1452 int ext1 = lm85_read_value(client,
1453 EMC6D102_REG_EXTEND_ADC1);
1454 int ext2 = lm85_read_value(client,
1455 EMC6D102_REG_EXTEND_ADC2);
1456 int ext3 = lm85_read_value(client,
1457 EMC6D102_REG_EXTEND_ADC3);
1458 int ext4 = lm85_read_value(client,
1459 EMC6D102_REG_EXTEND_ADC4);
1460 data->in_ext[0] = ext3 & 0x0f;
1461 data->in_ext[1] = ext4 & 0x0f;
1462 data->in_ext[2] = ext4 >> 4;
1463 data->in_ext[3] = ext3 >> 4;
1464 data->in_ext[4] = ext2 >> 4;
1466 data->temp_ext[0] = ext1 & 0x0f;
1467 data->temp_ext[1] = ext2 & 0x0f;
1468 data->temp_ext[2] = ext1 >> 4;
1471 data->last_reading = jiffies;
1472 } /* last_reading */
1475 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1476 /* Things that don't change often */
1477 dev_dbg(&client->dev, "Reading config values\n");
1479 for (i = 0; i <= 3; ++i) {
1481 lm85_read_value(client, LM85_REG_IN_MIN(i));
1483 lm85_read_value(client, LM85_REG_IN_MAX(i));
1485 lm85_read_value(client, LM85_REG_FAN_MIN(i));
1488 if (!((data->type == adt7463 || data->type == adt7468) &&
1489 (data->vid & 0x80))) {
1490 data->in_min[4] = lm85_read_value(client,
1491 LM85_REG_IN_MIN(4));
1492 data->in_max[4] = lm85_read_value(client,
1493 LM85_REG_IN_MAX(4));
1496 if (data->type == emc6d100) {
1497 for (i = 5; i <= 7; ++i) {
1498 data->in_min[i] = lm85_read_value(client,
1499 EMC6D100_REG_IN_MIN(i));
1500 data->in_max[i] = lm85_read_value(client,
1501 EMC6D100_REG_IN_MAX(i));
1505 for (i = 0; i <= 2; ++i) {
1509 lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1511 lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1513 data->autofan[i].config =
1514 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1515 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1516 data->pwm_freq[i] = val & 0x07;
1517 data->zone[i].range = val >> 4;
1518 data->autofan[i].min_pwm =
1519 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1520 data->zone[i].limit =
1521 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1522 data->zone[i].critical =
1523 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1525 if (IS_ADT7468_OFF64(data)) {
1526 data->temp_min[i] -= 64;
1527 data->temp_max[i] -= 64;
1528 data->zone[i].limit -= 64;
1529 data->zone[i].critical -= 64;
1533 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1534 data->autofan[0].min_off = (i & 0x20) != 0;
1535 data->autofan[1].min_off = (i & 0x40) != 0;
1536 data->autofan[2].min_off = (i & 0x80) != 0;
1538 i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1539 data->zone[0].hyst = i >> 4;
1540 data->zone[1].hyst = i & 0x0f;
1542 i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1543 data->zone[2].hyst = i >> 4;
1545 data->last_config = jiffies;
1550 mutex_unlock(&data->update_lock);
1556 static int __init sm_lm85_init(void)
1558 return i2c_add_driver(&lm85_driver);
1561 static void __exit sm_lm85_exit(void)
1563 i2c_del_driver(&lm85_driver);
1566 MODULE_LICENSE("GPL");
1567 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1568 "Margit Schubert-While <margitsw@t-online.de>, "
1569 "Justin Thiessen <jthiessen@penguincomputing.com>");
1570 MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1572 module_init(sm_lm85_init);
1573 module_exit(sm_lm85_exit);