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/i2c-sensor.h>
31 /* Addresses to scan */
32 static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c,
33 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
34 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
36 /* Insmod parameters */
37 SENSORS_INSMOD_1(lm80);
39 /* Many LM80 constants specified below */
41 /* The LM80 registers */
42 #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
43 #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
44 #define LM80_REG_IN(nr) (0x20 + (nr))
46 #define LM80_REG_FAN1 0x28
47 #define LM80_REG_FAN2 0x29
48 #define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
50 #define LM80_REG_TEMP 0x27
51 #define LM80_REG_TEMP_HOT_MAX 0x38
52 #define LM80_REG_TEMP_HOT_HYST 0x39
53 #define LM80_REG_TEMP_OS_MAX 0x3a
54 #define LM80_REG_TEMP_OS_HYST 0x3b
56 #define LM80_REG_CONFIG 0x00
57 #define LM80_REG_ALARM1 0x01
58 #define LM80_REG_ALARM2 0x02
59 #define LM80_REG_MASK1 0x03
60 #define LM80_REG_MASK2 0x04
61 #define LM80_REG_FANDIV 0x05
62 #define LM80_REG_RES 0x06
65 /* Conversions. Rounding and limit checking is only done on the TO_REG
66 variants. Note that you should be a bit careful with which arguments
67 these macros are called: arguments may be evaluated more than once.
68 Fixing this is just not worth it. */
70 #define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
71 #define IN_FROM_REG(val) ((val)*10)
73 static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
77 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
78 return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
81 #define FAN_FROM_REG(val,div) ((val)==0?-1:\
82 (val)==255?0:1350000/((div)*(val)))
84 static inline long TEMP_FROM_REG(u16 temp)
90 res = 625 * (long) temp;
92 res = ((long) temp - 0x01000) * 625;
97 #define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
99 #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
100 ((val)-500)/1000:((val)+500)/1000,0,255)
102 #define DIV_FROM_REG(val) (1 << (val))
105 * Client data (each client gets its own)
109 struct i2c_client client;
110 struct semaphore update_lock;
111 char valid; /* !=0 if following fields are valid */
112 unsigned long last_updated; /* In jiffies */
114 u8 in[7]; /* Register value */
115 u8 in_max[7]; /* Register value */
116 u8 in_min[7]; /* Register value */
117 u8 fan[2]; /* Register value */
118 u8 fan_min[2]; /* Register value */
119 u8 fan_div[2]; /* Register encoding, shifted right */
120 u16 temp; /* Register values, shifted right */
121 u8 temp_hot_max; /* Register value */
122 u8 temp_hot_hyst; /* Register value */
123 u8 temp_os_max; /* Register value */
124 u8 temp_os_hyst; /* Register value */
125 u16 alarms; /* Register encoding, combined */
129 * Functions declaration
132 static int lm80_attach_adapter(struct i2c_adapter *adapter);
133 static int lm80_detect(struct i2c_adapter *adapter, int address, int kind);
134 static void lm80_init_client(struct i2c_client *client);
135 static int lm80_detach_client(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 struct i2c_driver lm80_driver = {
145 .owner = THIS_MODULE,
147 .id = I2C_DRIVERID_LM80,
148 .flags = I2C_DF_NOTIFY,
149 .attach_adapter = lm80_attach_adapter,
150 .detach_client = lm80_detach_client,
157 #define show_in(suffix, value) \
158 static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
160 struct lm80_data *data = lm80_update_device(dev); \
161 return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
163 show_in(min0, in_min[0]);
164 show_in(min1, in_min[1]);
165 show_in(min2, in_min[2]);
166 show_in(min3, in_min[3]);
167 show_in(min4, in_min[4]);
168 show_in(min5, in_min[5]);
169 show_in(min6, in_min[6]);
170 show_in(max0, in_max[0]);
171 show_in(max1, in_max[1]);
172 show_in(max2, in_max[2]);
173 show_in(max3, in_max[3]);
174 show_in(max4, in_max[4]);
175 show_in(max5, in_max[5]);
176 show_in(max6, in_max[6]);
177 show_in(input0, in[0]);
178 show_in(input1, in[1]);
179 show_in(input2, in[2]);
180 show_in(input3, in[3]);
181 show_in(input4, in[4]);
182 show_in(input5, in[5]);
183 show_in(input6, in[6]);
185 #define set_in(suffix, value, reg) \
186 static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
189 struct i2c_client *client = to_i2c_client(dev); \
190 struct lm80_data *data = i2c_get_clientdata(client); \
191 long val = simple_strtol(buf, NULL, 10); \
193 down(&data->update_lock);\
194 data->value = IN_TO_REG(val); \
195 lm80_write_value(client, reg, data->value); \
196 up(&data->update_lock);\
199 set_in(min0, in_min[0], LM80_REG_IN_MIN(0));
200 set_in(min1, in_min[1], LM80_REG_IN_MIN(1));
201 set_in(min2, in_min[2], LM80_REG_IN_MIN(2));
202 set_in(min3, in_min[3], LM80_REG_IN_MIN(3));
203 set_in(min4, in_min[4], LM80_REG_IN_MIN(4));
204 set_in(min5, in_min[5], LM80_REG_IN_MIN(5));
205 set_in(min6, in_min[6], LM80_REG_IN_MIN(6));
206 set_in(max0, in_max[0], LM80_REG_IN_MAX(0));
207 set_in(max1, in_max[1], LM80_REG_IN_MAX(1));
208 set_in(max2, in_max[2], LM80_REG_IN_MAX(2));
209 set_in(max3, in_max[3], LM80_REG_IN_MAX(3));
210 set_in(max4, in_max[4], LM80_REG_IN_MAX(4));
211 set_in(max5, in_max[5], LM80_REG_IN_MAX(5));
212 set_in(max6, in_max[6], LM80_REG_IN_MAX(6));
214 #define show_fan(suffix, value, div) \
215 static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
217 struct lm80_data *data = lm80_update_device(dev); \
218 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
219 DIV_FROM_REG(data->div))); \
221 show_fan(min1, fan_min[0], fan_div[0]);
222 show_fan(min2, fan_min[1], fan_div[1]);
223 show_fan(input1, fan[0], fan_div[0]);
224 show_fan(input2, fan[1], fan_div[1]);
226 #define show_fan_div(suffix, value) \
227 static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
229 struct lm80_data *data = lm80_update_device(dev); \
230 return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
232 show_fan_div(1, fan_div[0]);
233 show_fan_div(2, fan_div[1]);
235 #define set_fan(suffix, value, reg, div) \
236 static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
239 struct i2c_client *client = to_i2c_client(dev); \
240 struct lm80_data *data = i2c_get_clientdata(client); \
241 long val = simple_strtoul(buf, NULL, 10); \
243 down(&data->update_lock);\
244 data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
245 lm80_write_value(client, reg, data->value); \
246 up(&data->update_lock);\
249 set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]);
250 set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]);
252 /* Note: we save and restore the fan minimum here, because its value is
253 determined in part by the fan divisor. This follows the principle of
254 least suprise; the user doesn't expect the fan minimum to change just
255 because the divisor changed. */
256 static ssize_t set_fan_div(struct device *dev, const char *buf,
257 size_t count, int nr)
259 struct i2c_client *client = to_i2c_client(dev);
260 struct lm80_data *data = i2c_get_clientdata(client);
261 unsigned long min, val = simple_strtoul(buf, NULL, 10);
265 down(&data->update_lock);
266 min = FAN_FROM_REG(data->fan_min[nr],
267 DIV_FROM_REG(data->fan_div[nr]));
270 case 1: data->fan_div[nr] = 0; break;
271 case 2: data->fan_div[nr] = 1; break;
272 case 4: data->fan_div[nr] = 2; break;
273 case 8: data->fan_div[nr] = 3; break;
275 dev_err(&client->dev, "fan_div value %ld not "
276 "supported. Choose one of 1, 2, 4 or 8!\n", val);
277 up(&data->update_lock);
281 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
282 | (data->fan_div[nr] << (2 * (nr + 1)));
283 lm80_write_value(client, LM80_REG_FANDIV, reg);
285 /* Restore fan_min */
286 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
287 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
288 up(&data->update_lock);
293 #define set_fan_div(number) \
294 static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \
297 return set_fan_div(dev, buf, count, number - 1); \
302 static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
304 struct lm80_data *data = lm80_update_device(dev);
305 return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
308 #define show_temp(suffix, value) \
309 static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
311 struct lm80_data *data = lm80_update_device(dev); \
312 return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
314 show_temp(hot_max, temp_hot_max);
315 show_temp(hot_hyst, temp_hot_hyst);
316 show_temp(os_max, temp_os_max);
317 show_temp(os_hyst, temp_os_hyst);
319 #define set_temp(suffix, value, reg) \
320 static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
323 struct i2c_client *client = to_i2c_client(dev); \
324 struct lm80_data *data = i2c_get_clientdata(client); \
325 long val = simple_strtoul(buf, NULL, 10); \
327 down(&data->update_lock); \
328 data->value = TEMP_LIMIT_TO_REG(val); \
329 lm80_write_value(client, reg, data->value); \
330 up(&data->update_lock); \
333 set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
334 set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
335 set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
336 set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
338 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
340 struct lm80_data *data = lm80_update_device(dev);
341 return sprintf(buf, "%u\n", data->alarms);
344 static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);
345 static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1);
346 static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2);
347 static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3);
348 static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4);
349 static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5);
350 static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6);
351 static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0);
352 static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1);
353 static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2);
354 static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3);
355 static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4);
356 static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5);
357 static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6);
358 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
359 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
360 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
361 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
362 static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL);
363 static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL);
364 static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL);
365 static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1,
367 static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2,
369 static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
370 static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
371 static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1);
372 static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2);
373 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
374 static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
376 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
378 static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
380 static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
382 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
388 static int lm80_attach_adapter(struct i2c_adapter *adapter)
390 if (!(adapter->class & I2C_CLASS_HWMON))
392 return i2c_detect(adapter, &addr_data, lm80_detect);
395 int lm80_detect(struct i2c_adapter *adapter, int address, int kind)
398 struct i2c_client *new_client;
399 struct lm80_data *data;
403 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
406 /* OK. For now, we presume we have a valid client. We now create the
407 client structure, even though we cannot fill it completely yet.
408 But it allows us to access lm80_{read,write}_value. */
409 if (!(data = kmalloc(sizeof(struct lm80_data), GFP_KERNEL))) {
413 memset(data, 0, sizeof(struct lm80_data));
415 new_client = &data->client;
416 i2c_set_clientdata(new_client, data);
417 new_client->addr = address;
418 new_client->adapter = adapter;
419 new_client->driver = &lm80_driver;
420 new_client->flags = 0;
422 /* Now, we do the remaining detection. It is lousy. */
423 if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
425 for (i = 0x2a; i <= 0x3d; i++) {
426 cur = i2c_smbus_read_byte_data(new_client, i);
427 if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
428 || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur)
429 || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur))
433 /* Determine the chip type - only one kind supported! */
437 /* Fill in the remaining client fields and put it into the global list */
438 strlcpy(new_client->name, name, I2C_NAME_SIZE);
440 init_MUTEX(&data->update_lock);
442 /* Tell the I2C layer a new client has arrived */
443 if ((err = i2c_attach_client(new_client)))
446 /* Initialize the LM80 chip */
447 lm80_init_client(new_client);
449 /* A few vars need to be filled upon startup */
450 data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1));
451 data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2));
453 /* Register sysfs hooks */
454 device_create_file(&new_client->dev, &dev_attr_in0_min);
455 device_create_file(&new_client->dev, &dev_attr_in1_min);
456 device_create_file(&new_client->dev, &dev_attr_in2_min);
457 device_create_file(&new_client->dev, &dev_attr_in3_min);
458 device_create_file(&new_client->dev, &dev_attr_in4_min);
459 device_create_file(&new_client->dev, &dev_attr_in5_min);
460 device_create_file(&new_client->dev, &dev_attr_in6_min);
461 device_create_file(&new_client->dev, &dev_attr_in0_max);
462 device_create_file(&new_client->dev, &dev_attr_in1_max);
463 device_create_file(&new_client->dev, &dev_attr_in2_max);
464 device_create_file(&new_client->dev, &dev_attr_in3_max);
465 device_create_file(&new_client->dev, &dev_attr_in4_max);
466 device_create_file(&new_client->dev, &dev_attr_in5_max);
467 device_create_file(&new_client->dev, &dev_attr_in6_max);
468 device_create_file(&new_client->dev, &dev_attr_in0_input);
469 device_create_file(&new_client->dev, &dev_attr_in1_input);
470 device_create_file(&new_client->dev, &dev_attr_in2_input);
471 device_create_file(&new_client->dev, &dev_attr_in3_input);
472 device_create_file(&new_client->dev, &dev_attr_in4_input);
473 device_create_file(&new_client->dev, &dev_attr_in5_input);
474 device_create_file(&new_client->dev, &dev_attr_in6_input);
475 device_create_file(&new_client->dev, &dev_attr_fan1_min);
476 device_create_file(&new_client->dev, &dev_attr_fan2_min);
477 device_create_file(&new_client->dev, &dev_attr_fan1_input);
478 device_create_file(&new_client->dev, &dev_attr_fan2_input);
479 device_create_file(&new_client->dev, &dev_attr_fan1_div);
480 device_create_file(&new_client->dev, &dev_attr_fan2_div);
481 device_create_file(&new_client->dev, &dev_attr_temp1_input);
482 device_create_file(&new_client->dev, &dev_attr_temp1_max);
483 device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
484 device_create_file(&new_client->dev, &dev_attr_temp1_crit);
485 device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst);
486 device_create_file(&new_client->dev, &dev_attr_alarms);
496 static int lm80_detach_client(struct i2c_client *client)
500 if ((err = i2c_detach_client(client))) {
501 dev_err(&client->dev, "Client deregistration failed, "
502 "client not detached.\n");
506 kfree(i2c_get_clientdata(client));
510 static int lm80_read_value(struct i2c_client *client, u8 reg)
512 return i2c_smbus_read_byte_data(client, reg);
515 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
517 return i2c_smbus_write_byte_data(client, reg, value);
520 /* Called when we have found a new LM80. */
521 static void lm80_init_client(struct i2c_client *client)
523 /* Reset all except Watchdog values and last conversion values
524 This sets fan-divs to 2, among others. This makes most other
525 initializations unnecessary */
526 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
527 /* Set 11-bit temperature resolution */
528 lm80_write_value(client, LM80_REG_RES, 0x08);
530 /* Start monitoring */
531 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
534 static struct lm80_data *lm80_update_device(struct device *dev)
536 struct i2c_client *client = to_i2c_client(dev);
537 struct lm80_data *data = i2c_get_clientdata(client);
540 down(&data->update_lock);
542 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
543 dev_dbg(&client->dev, "Starting lm80 update\n");
544 for (i = 0; i <= 6; i++) {
546 lm80_read_value(client, LM80_REG_IN(i));
548 lm80_read_value(client, LM80_REG_IN_MIN(i));
550 lm80_read_value(client, LM80_REG_IN_MAX(i));
552 data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
554 lm80_read_value(client, LM80_REG_FAN_MIN(1));
555 data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
557 lm80_read_value(client, LM80_REG_FAN_MIN(2));
560 (lm80_read_value(client, LM80_REG_TEMP) << 8) |
561 (lm80_read_value(client, LM80_REG_RES) & 0xf0);
563 lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
565 lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
567 lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
568 data->temp_hot_hyst =
569 lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
571 i = lm80_read_value(client, LM80_REG_FANDIV);
572 data->fan_div[0] = (i >> 2) & 0x03;
573 data->fan_div[1] = (i >> 4) & 0x03;
574 data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
575 (lm80_read_value(client, LM80_REG_ALARM2) << 8);
576 data->last_updated = jiffies;
580 up(&data->update_lock);
585 static int __init sensors_lm80_init(void)
587 return i2c_add_driver(&lm80_driver);
590 static void __exit sensors_lm80_exit(void)
592 i2c_del_driver(&lm80_driver);
595 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
596 "Philip Edelbrock <phil@netroedge.com>");
597 MODULE_DESCRIPTION("LM80 driver");
598 MODULE_LICENSE("GPL");
600 module_init(sensors_lm80_init);
601 module_exit(sensors_lm80_exit);