2 * lm80.c - From lm_sensors, Linux kernel modules for hardware
4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 * and Philip Edelbrock <phil@netroedge.com>
7 * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/hwmon.h>
30 #include <linux/hwmon-sysfs.h>
31 #include <linux/err.h>
32 #include <linux/mutex.h>
34 /* Addresses to scan */
35 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
36 0x2e, 0x2f, I2C_CLIENT_END };
38 /* Many LM80 constants specified below */
40 /* The LM80 registers */
41 #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
42 #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
43 #define LM80_REG_IN(nr) (0x20 + (nr))
45 #define LM80_REG_FAN1 0x28
46 #define LM80_REG_FAN2 0x29
47 #define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
49 #define LM80_REG_TEMP 0x27
50 #define LM80_REG_TEMP_HOT_MAX 0x38
51 #define LM80_REG_TEMP_HOT_HYST 0x39
52 #define LM80_REG_TEMP_OS_MAX 0x3a
53 #define LM80_REG_TEMP_OS_HYST 0x3b
55 #define LM80_REG_CONFIG 0x00
56 #define LM80_REG_ALARM1 0x01
57 #define LM80_REG_ALARM2 0x02
58 #define LM80_REG_MASK1 0x03
59 #define LM80_REG_MASK2 0x04
60 #define LM80_REG_FANDIV 0x05
61 #define LM80_REG_RES 0x06
64 /* Conversions. Rounding and limit checking is only done on the TO_REG
65 variants. Note that you should be a bit careful with which arguments
66 these macros are called: arguments may be evaluated more than once.
67 Fixing this is just not worth it. */
69 #define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
70 #define IN_FROM_REG(val) ((val)*10)
72 static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
76 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
77 return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
80 #define FAN_FROM_REG(val,div) ((val)==0?-1:\
81 (val)==255?0:1350000/((div)*(val)))
83 static inline long TEMP_FROM_REG(u16 temp)
89 res = 625 * (long) temp;
91 res = ((long) temp - 0x01000) * 625;
96 #define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
98 #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
99 ((val)-500)/1000:((val)+500)/1000,0,255)
101 #define DIV_FROM_REG(val) (1 << (val))
104 * Client data (each client gets its own)
108 struct device *hwmon_dev;
109 struct mutex update_lock;
110 char valid; /* !=0 if following fields are valid */
111 unsigned long last_updated; /* In jiffies */
113 u8 in[7]; /* Register value */
114 u8 in_max[7]; /* Register value */
115 u8 in_min[7]; /* Register value */
116 u8 fan[2]; /* Register value */
117 u8 fan_min[2]; /* Register value */
118 u8 fan_div[2]; /* Register encoding, shifted right */
119 u16 temp; /* Register values, shifted right */
120 u8 temp_hot_max; /* Register value */
121 u8 temp_hot_hyst; /* Register value */
122 u8 temp_os_max; /* Register value */
123 u8 temp_os_hyst; /* Register value */
124 u16 alarms; /* Register encoding, combined */
128 * Functions declaration
131 static int lm80_probe(struct i2c_client *client,
132 const struct i2c_device_id *id);
133 static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
134 static void lm80_init_client(struct i2c_client *client);
135 static int lm80_remove(struct i2c_client *client);
136 static struct lm80_data *lm80_update_device(struct device *dev);
137 static int lm80_read_value(struct i2c_client *client, u8 reg);
138 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
141 * Driver data (common to all clients)
144 static const struct i2c_device_id lm80_id[] = {
148 MODULE_DEVICE_TABLE(i2c, lm80_id);
150 static struct i2c_driver lm80_driver = {
151 .class = I2C_CLASS_HWMON,
156 .remove = lm80_remove,
158 .detect = lm80_detect,
159 .address_list = normal_i2c,
166 #define show_in(suffix, value) \
167 static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
169 int nr = to_sensor_dev_attr(attr)->index; \
170 struct lm80_data *data = lm80_update_device(dev); \
171 return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
177 #define set_in(suffix, value, reg) \
178 static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
181 int nr = to_sensor_dev_attr(attr)->index; \
182 struct i2c_client *client = to_i2c_client(dev); \
183 struct lm80_data *data = i2c_get_clientdata(client); \
184 long val = simple_strtol(buf, NULL, 10); \
186 mutex_lock(&data->update_lock);\
187 data->value[nr] = IN_TO_REG(val); \
188 lm80_write_value(client, reg(nr), data->value[nr]); \
189 mutex_unlock(&data->update_lock);\
192 set_in(min, in_min, LM80_REG_IN_MIN)
193 set_in(max, in_max, LM80_REG_IN_MAX)
195 #define show_fan(suffix, value) \
196 static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
198 int nr = to_sensor_dev_attr(attr)->index; \
199 struct lm80_data *data = lm80_update_device(dev); \
200 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
201 DIV_FROM_REG(data->fan_div[nr]))); \
203 show_fan(min, fan_min)
206 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
209 int nr = to_sensor_dev_attr(attr)->index;
210 struct lm80_data *data = lm80_update_device(dev);
211 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
214 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
215 const char *buf, size_t count)
217 int nr = to_sensor_dev_attr(attr)->index;
218 struct i2c_client *client = to_i2c_client(dev);
219 struct lm80_data *data = i2c_get_clientdata(client);
220 long val = simple_strtoul(buf, NULL, 10);
222 mutex_lock(&data->update_lock);
223 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
224 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
225 mutex_unlock(&data->update_lock);
229 /* Note: we save and restore the fan minimum here, because its value is
230 determined in part by the fan divisor. This follows the principle of
231 least surprise; the user doesn't expect the fan minimum to change just
232 because the divisor changed. */
233 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
234 const char *buf, size_t count)
236 int nr = to_sensor_dev_attr(attr)->index;
237 struct i2c_client *client = to_i2c_client(dev);
238 struct lm80_data *data = i2c_get_clientdata(client);
239 unsigned long min, val = simple_strtoul(buf, NULL, 10);
243 mutex_lock(&data->update_lock);
244 min = FAN_FROM_REG(data->fan_min[nr],
245 DIV_FROM_REG(data->fan_div[nr]));
248 case 1: data->fan_div[nr] = 0; break;
249 case 2: data->fan_div[nr] = 1; break;
250 case 4: data->fan_div[nr] = 2; break;
251 case 8: data->fan_div[nr] = 3; break;
253 dev_err(&client->dev, "fan_div value %ld not "
254 "supported. Choose one of 1, 2, 4 or 8!\n", val);
255 mutex_unlock(&data->update_lock);
259 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
260 | (data->fan_div[nr] << (2 * (nr + 1)));
261 lm80_write_value(client, LM80_REG_FANDIV, reg);
263 /* Restore fan_min */
264 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
265 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
266 mutex_unlock(&data->update_lock);
271 static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
273 struct lm80_data *data = lm80_update_device(dev);
274 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
277 #define show_temp(suffix, value) \
278 static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
280 struct lm80_data *data = lm80_update_device(dev); \
281 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
283 show_temp(hot_max, temp_hot_max);
284 show_temp(hot_hyst, temp_hot_hyst);
285 show_temp(os_max, temp_os_max);
286 show_temp(os_hyst, temp_os_hyst);
288 #define set_temp(suffix, value, reg) \
289 static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
292 struct i2c_client *client = to_i2c_client(dev); \
293 struct lm80_data *data = i2c_get_clientdata(client); \
294 long val = simple_strtoul(buf, NULL, 10); \
296 mutex_lock(&data->update_lock); \
297 data->value = TEMP_LIMIT_TO_REG(val); \
298 lm80_write_value(client, reg, data->value); \
299 mutex_unlock(&data->update_lock); \
302 set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
303 set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
304 set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
305 set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
307 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
310 struct lm80_data *data = lm80_update_device(dev);
311 return sprintf(buf, "%u\n", data->alarms);
314 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
317 int bitnr = to_sensor_dev_attr(attr)->index;
318 struct lm80_data *data = lm80_update_device(dev);
319 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
322 static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
323 show_in_min, set_in_min, 0);
324 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
325 show_in_min, set_in_min, 1);
326 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
327 show_in_min, set_in_min, 2);
328 static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
329 show_in_min, set_in_min, 3);
330 static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
331 show_in_min, set_in_min, 4);
332 static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
333 show_in_min, set_in_min, 5);
334 static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
335 show_in_min, set_in_min, 6);
336 static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
337 show_in_max, set_in_max, 0);
338 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
339 show_in_max, set_in_max, 1);
340 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
341 show_in_max, set_in_max, 2);
342 static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
343 show_in_max, set_in_max, 3);
344 static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
345 show_in_max, set_in_max, 4);
346 static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
347 show_in_max, set_in_max, 5);
348 static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
349 show_in_max, set_in_max, 6);
350 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
351 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
352 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
353 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
354 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
355 static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
356 static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
357 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
358 show_fan_min, set_fan_min, 0);
359 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
360 show_fan_min, set_fan_min, 1);
361 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
362 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
363 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
364 show_fan_div, set_fan_div, 0);
365 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
366 show_fan_div, set_fan_div, 1);
367 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
368 static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
370 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
372 static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
374 static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
376 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
377 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
378 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
379 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
380 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
381 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
382 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
383 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
384 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
385 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
386 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
387 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
393 static struct attribute *lm80_attributes[] = {
394 &sensor_dev_attr_in0_min.dev_attr.attr,
395 &sensor_dev_attr_in1_min.dev_attr.attr,
396 &sensor_dev_attr_in2_min.dev_attr.attr,
397 &sensor_dev_attr_in3_min.dev_attr.attr,
398 &sensor_dev_attr_in4_min.dev_attr.attr,
399 &sensor_dev_attr_in5_min.dev_attr.attr,
400 &sensor_dev_attr_in6_min.dev_attr.attr,
401 &sensor_dev_attr_in0_max.dev_attr.attr,
402 &sensor_dev_attr_in1_max.dev_attr.attr,
403 &sensor_dev_attr_in2_max.dev_attr.attr,
404 &sensor_dev_attr_in3_max.dev_attr.attr,
405 &sensor_dev_attr_in4_max.dev_attr.attr,
406 &sensor_dev_attr_in5_max.dev_attr.attr,
407 &sensor_dev_attr_in6_max.dev_attr.attr,
408 &sensor_dev_attr_in0_input.dev_attr.attr,
409 &sensor_dev_attr_in1_input.dev_attr.attr,
410 &sensor_dev_attr_in2_input.dev_attr.attr,
411 &sensor_dev_attr_in3_input.dev_attr.attr,
412 &sensor_dev_attr_in4_input.dev_attr.attr,
413 &sensor_dev_attr_in5_input.dev_attr.attr,
414 &sensor_dev_attr_in6_input.dev_attr.attr,
415 &sensor_dev_attr_fan1_min.dev_attr.attr,
416 &sensor_dev_attr_fan2_min.dev_attr.attr,
417 &sensor_dev_attr_fan1_input.dev_attr.attr,
418 &sensor_dev_attr_fan2_input.dev_attr.attr,
419 &sensor_dev_attr_fan1_div.dev_attr.attr,
420 &sensor_dev_attr_fan2_div.dev_attr.attr,
421 &dev_attr_temp1_input.attr,
422 &dev_attr_temp1_max.attr,
423 &dev_attr_temp1_max_hyst.attr,
424 &dev_attr_temp1_crit.attr,
425 &dev_attr_temp1_crit_hyst.attr,
426 &dev_attr_alarms.attr,
427 &sensor_dev_attr_in0_alarm.dev_attr.attr,
428 &sensor_dev_attr_in1_alarm.dev_attr.attr,
429 &sensor_dev_attr_in2_alarm.dev_attr.attr,
430 &sensor_dev_attr_in3_alarm.dev_attr.attr,
431 &sensor_dev_attr_in4_alarm.dev_attr.attr,
432 &sensor_dev_attr_in5_alarm.dev_attr.attr,
433 &sensor_dev_attr_in6_alarm.dev_attr.attr,
434 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
435 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
436 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
437 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
441 static const struct attribute_group lm80_group = {
442 .attrs = lm80_attributes,
445 /* Return 0 if detection is successful, -ENODEV otherwise */
446 static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
448 struct i2c_adapter *adapter = client->adapter;
451 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
454 /* Now, we do the remaining detection. It is lousy. */
455 if (lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
457 for (i = 0x2a; i <= 0x3d; i++) {
458 cur = i2c_smbus_read_byte_data(client, i);
459 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
460 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
461 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
465 strlcpy(info->type, "lm80", I2C_NAME_SIZE);
470 static int lm80_probe(struct i2c_client *client,
471 const struct i2c_device_id *id)
473 struct lm80_data *data;
476 data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
482 i2c_set_clientdata(client, data);
483 mutex_init(&data->update_lock);
485 /* Initialize the LM80 chip */
486 lm80_init_client(client);
488 /* A few vars need to be filled upon startup */
489 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
490 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
492 /* Register sysfs hooks */
493 if ((err = sysfs_create_group(&client->dev.kobj, &lm80_group)))
496 data->hwmon_dev = hwmon_device_register(&client->dev);
497 if (IS_ERR(data->hwmon_dev)) {
498 err = PTR_ERR(data->hwmon_dev);
505 sysfs_remove_group(&client->dev.kobj, &lm80_group);
512 static int lm80_remove(struct i2c_client *client)
514 struct lm80_data *data = i2c_get_clientdata(client);
516 hwmon_device_unregister(data->hwmon_dev);
517 sysfs_remove_group(&client->dev.kobj, &lm80_group);
523 static int lm80_read_value(struct i2c_client *client, u8 reg)
525 return i2c_smbus_read_byte_data(client, reg);
528 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
530 return i2c_smbus_write_byte_data(client, reg, value);
533 /* Called when we have found a new LM80. */
534 static void lm80_init_client(struct i2c_client *client)
536 /* Reset all except Watchdog values and last conversion values
537 This sets fan-divs to 2, among others. This makes most other
538 initializations unnecessary */
539 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
540 /* Set 11-bit temperature resolution */
541 lm80_write_value(client, LM80_REG_RES, 0x08);
543 /* Start monitoring */
544 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
547 static struct lm80_data *lm80_update_device(struct device *dev)
549 struct i2c_client *client = to_i2c_client(dev);
550 struct lm80_data *data = i2c_get_clientdata(client);
553 mutex_lock(&data->update_lock);
555 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
556 dev_dbg(&client->dev, "Starting lm80 update\n");
557 for (i = 0; i <= 6; i++) {
559 lm80_read_value(client, LM80_REG_IN(i));
561 lm80_read_value(client, LM80_REG_IN_MIN(i));
563 lm80_read_value(client, LM80_REG_IN_MAX(i));
565 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
567 lm80_read_value(client, LM80_REG_FAN_MIN(1));
568 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
570 lm80_read_value(client, LM80_REG_FAN_MIN(2));
573 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
574 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
576 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
578 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
580 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
581 data->temp_hot_hyst =
582 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
584 i = lm80_read_value(client, LM80_REG_FANDIV);
585 data->fan_div[0] = (i >> 2) & 0x03;
586 data->fan_div[1] = (i >> 4) & 0x03;
587 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
588 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
589 data->last_updated = jiffies;
593 mutex_unlock(&data->update_lock);
598 static int __init sensors_lm80_init(void)
600 return i2c_add_driver(&lm80_driver);
603 static void __exit sensors_lm80_exit(void)
605 i2c_del_driver(&lm80_driver);
608 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
609 "Philip Edelbrock <phil@netroedge.com>");
610 MODULE_DESCRIPTION("LM80 driver");
611 MODULE_LICENSE("GPL");
613 module_init(sensors_lm80_init);
614 module_exit(sensors_lm80_exit);