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 /* Insmod parameters */
39 I2C_CLIENT_INSMOD_1(lm80);
41 /* Many LM80 constants specified below */
43 /* The LM80 registers */
44 #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
45 #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
46 #define LM80_REG_IN(nr) (0x20 + (nr))
48 #define LM80_REG_FAN1 0x28
49 #define LM80_REG_FAN2 0x29
50 #define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
52 #define LM80_REG_TEMP 0x27
53 #define LM80_REG_TEMP_HOT_MAX 0x38
54 #define LM80_REG_TEMP_HOT_HYST 0x39
55 #define LM80_REG_TEMP_OS_MAX 0x3a
56 #define LM80_REG_TEMP_OS_HYST 0x3b
58 #define LM80_REG_CONFIG 0x00
59 #define LM80_REG_ALARM1 0x01
60 #define LM80_REG_ALARM2 0x02
61 #define LM80_REG_MASK1 0x03
62 #define LM80_REG_MASK2 0x04
63 #define LM80_REG_FANDIV 0x05
64 #define LM80_REG_RES 0x06
67 /* Conversions. Rounding and limit checking is only done on the TO_REG
68 variants. Note that you should be a bit careful with which arguments
69 these macros are called: arguments may be evaluated more than once.
70 Fixing this is just not worth it. */
72 #define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
73 #define IN_FROM_REG(val) ((val)*10)
75 static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
79 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
80 return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
83 #define FAN_FROM_REG(val,div) ((val)==0?-1:\
84 (val)==255?0:1350000/((div)*(val)))
86 static inline long TEMP_FROM_REG(u16 temp)
92 res = 625 * (long) temp;
94 res = ((long) temp - 0x01000) * 625;
99 #define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
101 #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
102 ((val)-500)/1000:((val)+500)/1000,0,255)
104 #define DIV_FROM_REG(val) (1 << (val))
107 * Client data (each client gets its own)
111 struct device *hwmon_dev;
112 struct mutex update_lock;
113 char valid; /* !=0 if following fields are valid */
114 unsigned long last_updated; /* In jiffies */
116 u8 in[7]; /* Register value */
117 u8 in_max[7]; /* Register value */
118 u8 in_min[7]; /* Register value */
119 u8 fan[2]; /* Register value */
120 u8 fan_min[2]; /* Register value */
121 u8 fan_div[2]; /* Register encoding, shifted right */
122 u16 temp; /* Register values, shifted right */
123 u8 temp_hot_max; /* Register value */
124 u8 temp_hot_hyst; /* Register value */
125 u8 temp_os_max; /* Register value */
126 u8 temp_os_hyst; /* Register value */
127 u16 alarms; /* Register encoding, combined */
131 * Functions declaration
134 static int lm80_probe(struct i2c_client *client,
135 const struct i2c_device_id *id);
136 static int lm80_detect(struct i2c_client *client, int kind,
137 struct i2c_board_info *info);
138 static void lm80_init_client(struct i2c_client *client);
139 static int lm80_remove(struct i2c_client *client);
140 static struct lm80_data *lm80_update_device(struct device *dev);
141 static int lm80_read_value(struct i2c_client *client, u8 reg);
142 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
145 * Driver data (common to all clients)
148 static const struct i2c_device_id lm80_id[] = {
152 MODULE_DEVICE_TABLE(i2c, lm80_id);
154 static struct i2c_driver lm80_driver = {
155 .class = I2C_CLASS_HWMON,
160 .remove = lm80_remove,
162 .detect = lm80_detect,
163 .address_data = &addr_data,
170 #define show_in(suffix, value) \
171 static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
173 int nr = to_sensor_dev_attr(attr)->index; \
174 struct lm80_data *data = lm80_update_device(dev); \
175 return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
181 #define set_in(suffix, value, reg) \
182 static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
185 int nr = to_sensor_dev_attr(attr)->index; \
186 struct i2c_client *client = to_i2c_client(dev); \
187 struct lm80_data *data = i2c_get_clientdata(client); \
188 long val = simple_strtol(buf, NULL, 10); \
190 mutex_lock(&data->update_lock);\
191 data->value[nr] = IN_TO_REG(val); \
192 lm80_write_value(client, reg(nr), data->value[nr]); \
193 mutex_unlock(&data->update_lock);\
196 set_in(min, in_min, LM80_REG_IN_MIN)
197 set_in(max, in_max, LM80_REG_IN_MAX)
199 #define show_fan(suffix, value) \
200 static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
202 int nr = to_sensor_dev_attr(attr)->index; \
203 struct lm80_data *data = lm80_update_device(dev); \
204 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
205 DIV_FROM_REG(data->fan_div[nr]))); \
207 show_fan(min, fan_min)
210 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
213 int nr = to_sensor_dev_attr(attr)->index;
214 struct lm80_data *data = lm80_update_device(dev);
215 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
218 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
219 const char *buf, size_t count)
221 int nr = to_sensor_dev_attr(attr)->index;
222 struct i2c_client *client = to_i2c_client(dev);
223 struct lm80_data *data = i2c_get_clientdata(client);
224 long val = simple_strtoul(buf, NULL, 10);
226 mutex_lock(&data->update_lock);
227 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
228 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
229 mutex_unlock(&data->update_lock);
233 /* Note: we save and restore the fan minimum here, because its value is
234 determined in part by the fan divisor. This follows the principle of
235 least surprise; the user doesn't expect the fan minimum to change just
236 because the divisor changed. */
237 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
238 const char *buf, size_t count)
240 int nr = to_sensor_dev_attr(attr)->index;
241 struct i2c_client *client = to_i2c_client(dev);
242 struct lm80_data *data = i2c_get_clientdata(client);
243 unsigned long min, val = simple_strtoul(buf, NULL, 10);
247 mutex_lock(&data->update_lock);
248 min = FAN_FROM_REG(data->fan_min[nr],
249 DIV_FROM_REG(data->fan_div[nr]));
252 case 1: data->fan_div[nr] = 0; break;
253 case 2: data->fan_div[nr] = 1; break;
254 case 4: data->fan_div[nr] = 2; break;
255 case 8: data->fan_div[nr] = 3; break;
257 dev_err(&client->dev, "fan_div value %ld not "
258 "supported. Choose one of 1, 2, 4 or 8!\n", val);
259 mutex_unlock(&data->update_lock);
263 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
264 | (data->fan_div[nr] << (2 * (nr + 1)));
265 lm80_write_value(client, LM80_REG_FANDIV, reg);
267 /* Restore fan_min */
268 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
269 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
270 mutex_unlock(&data->update_lock);
275 static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
277 struct lm80_data *data = lm80_update_device(dev);
278 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
281 #define show_temp(suffix, value) \
282 static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
284 struct lm80_data *data = lm80_update_device(dev); \
285 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
287 show_temp(hot_max, temp_hot_max);
288 show_temp(hot_hyst, temp_hot_hyst);
289 show_temp(os_max, temp_os_max);
290 show_temp(os_hyst, temp_os_hyst);
292 #define set_temp(suffix, value, reg) \
293 static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
296 struct i2c_client *client = to_i2c_client(dev); \
297 struct lm80_data *data = i2c_get_clientdata(client); \
298 long val = simple_strtoul(buf, NULL, 10); \
300 mutex_lock(&data->update_lock); \
301 data->value = TEMP_LIMIT_TO_REG(val); \
302 lm80_write_value(client, reg, data->value); \
303 mutex_unlock(&data->update_lock); \
306 set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
307 set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
308 set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
309 set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
311 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
314 struct lm80_data *data = lm80_update_device(dev);
315 return sprintf(buf, "%u\n", data->alarms);
318 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
321 int bitnr = to_sensor_dev_attr(attr)->index;
322 struct lm80_data *data = lm80_update_device(dev);
323 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
326 static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
327 show_in_min, set_in_min, 0);
328 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
329 show_in_min, set_in_min, 1);
330 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
331 show_in_min, set_in_min, 2);
332 static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
333 show_in_min, set_in_min, 3);
334 static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
335 show_in_min, set_in_min, 4);
336 static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
337 show_in_min, set_in_min, 5);
338 static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
339 show_in_min, set_in_min, 6);
340 static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
341 show_in_max, set_in_max, 0);
342 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
343 show_in_max, set_in_max, 1);
344 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
345 show_in_max, set_in_max, 2);
346 static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
347 show_in_max, set_in_max, 3);
348 static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
349 show_in_max, set_in_max, 4);
350 static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
351 show_in_max, set_in_max, 5);
352 static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
353 show_in_max, set_in_max, 6);
354 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
355 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
356 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
357 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
358 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
359 static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
360 static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
361 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
362 show_fan_min, set_fan_min, 0);
363 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
364 show_fan_min, set_fan_min, 1);
365 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
366 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
367 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
368 show_fan_div, set_fan_div, 0);
369 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
370 show_fan_div, set_fan_div, 1);
371 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
372 static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
374 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
376 static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
378 static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
380 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
381 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
382 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
383 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
384 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
385 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
386 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
387 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
388 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
389 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
390 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
391 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
397 static struct attribute *lm80_attributes[] = {
398 &sensor_dev_attr_in0_min.dev_attr.attr,
399 &sensor_dev_attr_in1_min.dev_attr.attr,
400 &sensor_dev_attr_in2_min.dev_attr.attr,
401 &sensor_dev_attr_in3_min.dev_attr.attr,
402 &sensor_dev_attr_in4_min.dev_attr.attr,
403 &sensor_dev_attr_in5_min.dev_attr.attr,
404 &sensor_dev_attr_in6_min.dev_attr.attr,
405 &sensor_dev_attr_in0_max.dev_attr.attr,
406 &sensor_dev_attr_in1_max.dev_attr.attr,
407 &sensor_dev_attr_in2_max.dev_attr.attr,
408 &sensor_dev_attr_in3_max.dev_attr.attr,
409 &sensor_dev_attr_in4_max.dev_attr.attr,
410 &sensor_dev_attr_in5_max.dev_attr.attr,
411 &sensor_dev_attr_in6_max.dev_attr.attr,
412 &sensor_dev_attr_in0_input.dev_attr.attr,
413 &sensor_dev_attr_in1_input.dev_attr.attr,
414 &sensor_dev_attr_in2_input.dev_attr.attr,
415 &sensor_dev_attr_in3_input.dev_attr.attr,
416 &sensor_dev_attr_in4_input.dev_attr.attr,
417 &sensor_dev_attr_in5_input.dev_attr.attr,
418 &sensor_dev_attr_in6_input.dev_attr.attr,
419 &sensor_dev_attr_fan1_min.dev_attr.attr,
420 &sensor_dev_attr_fan2_min.dev_attr.attr,
421 &sensor_dev_attr_fan1_input.dev_attr.attr,
422 &sensor_dev_attr_fan2_input.dev_attr.attr,
423 &sensor_dev_attr_fan1_div.dev_attr.attr,
424 &sensor_dev_attr_fan2_div.dev_attr.attr,
425 &dev_attr_temp1_input.attr,
426 &dev_attr_temp1_max.attr,
427 &dev_attr_temp1_max_hyst.attr,
428 &dev_attr_temp1_crit.attr,
429 &dev_attr_temp1_crit_hyst.attr,
430 &dev_attr_alarms.attr,
431 &sensor_dev_attr_in0_alarm.dev_attr.attr,
432 &sensor_dev_attr_in1_alarm.dev_attr.attr,
433 &sensor_dev_attr_in2_alarm.dev_attr.attr,
434 &sensor_dev_attr_in3_alarm.dev_attr.attr,
435 &sensor_dev_attr_in4_alarm.dev_attr.attr,
436 &sensor_dev_attr_in5_alarm.dev_attr.attr,
437 &sensor_dev_attr_in6_alarm.dev_attr.attr,
438 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
439 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
440 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
441 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
445 static const struct attribute_group lm80_group = {
446 .attrs = lm80_attributes,
449 /* Return 0 if detection is successful, -ENODEV otherwise */
450 static int lm80_detect(struct i2c_client *client, int kind,
451 struct i2c_board_info *info)
453 struct i2c_adapter *adapter = client->adapter;
456 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
459 /* Now, we do the remaining detection. It is lousy. */
460 if (lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
462 for (i = 0x2a; i <= 0x3d; i++) {
463 cur = i2c_smbus_read_byte_data(client, i);
464 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
465 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
466 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
470 strlcpy(info->type, "lm80", I2C_NAME_SIZE);
475 static int lm80_probe(struct i2c_client *client,
476 const struct i2c_device_id *id)
478 struct lm80_data *data;
481 data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
487 i2c_set_clientdata(client, data);
488 mutex_init(&data->update_lock);
490 /* Initialize the LM80 chip */
491 lm80_init_client(client);
493 /* A few vars need to be filled upon startup */
494 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
495 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
497 /* Register sysfs hooks */
498 if ((err = sysfs_create_group(&client->dev.kobj, &lm80_group)))
501 data->hwmon_dev = hwmon_device_register(&client->dev);
502 if (IS_ERR(data->hwmon_dev)) {
503 err = PTR_ERR(data->hwmon_dev);
510 sysfs_remove_group(&client->dev.kobj, &lm80_group);
517 static int lm80_remove(struct i2c_client *client)
519 struct lm80_data *data = i2c_get_clientdata(client);
521 hwmon_device_unregister(data->hwmon_dev);
522 sysfs_remove_group(&client->dev.kobj, &lm80_group);
528 static int lm80_read_value(struct i2c_client *client, u8 reg)
530 return i2c_smbus_read_byte_data(client, reg);
533 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
535 return i2c_smbus_write_byte_data(client, reg, value);
538 /* Called when we have found a new LM80. */
539 static void lm80_init_client(struct i2c_client *client)
541 /* Reset all except Watchdog values and last conversion values
542 This sets fan-divs to 2, among others. This makes most other
543 initializations unnecessary */
544 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
545 /* Set 11-bit temperature resolution */
546 lm80_write_value(client, LM80_REG_RES, 0x08);
548 /* Start monitoring */
549 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
552 static struct lm80_data *lm80_update_device(struct device *dev)
554 struct i2c_client *client = to_i2c_client(dev);
555 struct lm80_data *data = i2c_get_clientdata(client);
558 mutex_lock(&data->update_lock);
560 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
561 dev_dbg(&client->dev, "Starting lm80 update\n");
562 for (i = 0; i <= 6; i++) {
564 lm80_read_value(client, LM80_REG_IN(i));
566 lm80_read_value(client, LM80_REG_IN_MIN(i));
568 lm80_read_value(client, LM80_REG_IN_MAX(i));
570 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
572 lm80_read_value(client, LM80_REG_FAN_MIN(1));
573 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
575 lm80_read_value(client, LM80_REG_FAN_MIN(2));
578 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
579 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
581 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
583 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
585 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
586 data->temp_hot_hyst =
587 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
589 i = lm80_read_value(client, LM80_REG_FANDIV);
590 data->fan_div[0] = (i >> 2) & 0x03;
591 data->fan_div[1] = (i >> 4) & 0x03;
592 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
593 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
594 data->last_updated = jiffies;
598 mutex_unlock(&data->update_lock);
603 static int __init sensors_lm80_init(void)
605 return i2c_add_driver(&lm80_driver);
608 static void __exit sensors_lm80_exit(void)
610 i2c_del_driver(&lm80_driver);
613 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
614 "Philip Edelbrock <phil@netroedge.com>");
615 MODULE_DESCRIPTION("LM80 driver");
616 MODULE_LICENSE("GPL");
618 module_init(sensors_lm80_init);
619 module_exit(sensors_lm80_exit);