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
63 #define LM96080_REG_CONV_RATE 0x07
64 #define LM96080_REG_MAN_ID 0x3e
65 #define LM96080_REG_DEV_ID 0x3f
69 * Conversions. Rounding and limit checking is only done on the TO_REG
70 * variants. Note that you should be a bit careful with which arguments
71 * these macros are called: arguments may be evaluated more than once.
72 * Fixing this is just not worth it.
75 #define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255))
76 #define IN_FROM_REG(val) ((val) * 10)
78 static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
82 rpm = clamp_val(rpm, 1, 1000000);
83 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
86 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
87 (val) == 255 ? 0 : 1350000/((div) * (val)))
89 #define TEMP_FROM_REG(reg) ((reg) * 125 / 32)
90 #define TEMP_TO_REG(temp) (DIV_ROUND_CLOSEST(clamp_val((temp), \
91 -128000, 127000), 1000) << 8)
93 #define DIV_FROM_REG(val) (1 << (val))
104 static const u8 temp_regs[t_num_temp] = {
105 [t_input] = LM80_REG_TEMP,
106 [t_hot_max] = LM80_REG_TEMP_HOT_MAX,
107 [t_hot_hyst] = LM80_REG_TEMP_HOT_HYST,
108 [t_os_max] = LM80_REG_TEMP_OS_MAX,
109 [t_os_hyst] = LM80_REG_TEMP_OS_HYST,
120 * Client data (each client gets its own)
124 struct i2c_client *client;
125 struct mutex update_lock;
126 char error; /* !=0 if error occurred during last update */
127 char valid; /* !=0 if following fields are valid */
128 unsigned long last_updated; /* In jiffies */
130 u8 in[i_num_in][7]; /* Register value, 1st index is enum in_index */
131 u8 fan[2]; /* Register value */
132 u8 fan_min[2]; /* Register value */
133 u8 fan_div[2]; /* Register encoding, shifted right */
134 s16 temp[t_num_temp]; /* Register values, normalized to 16 bit */
135 u16 alarms; /* Register encoding, combined */
139 * Functions declaration
142 static int lm80_probe(struct i2c_client *client,
143 const struct i2c_device_id *id);
144 static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
145 static void lm80_init_client(struct i2c_client *client);
146 static struct lm80_data *lm80_update_device(struct device *dev);
147 static int lm80_read_value(struct i2c_client *client, u8 reg);
148 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
151 * Driver data (common to all clients)
154 static const struct i2c_device_id lm80_id[] = {
159 MODULE_DEVICE_TABLE(i2c, lm80_id);
161 static struct i2c_driver lm80_driver = {
162 .class = I2C_CLASS_HWMON,
168 .detect = lm80_detect,
169 .address_list = normal_i2c,
176 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
179 struct lm80_data *data = lm80_update_device(dev);
180 int index = to_sensor_dev_attr_2(attr)->index;
181 int nr = to_sensor_dev_attr_2(attr)->nr;
184 return PTR_ERR(data);
185 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr][index]));
188 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
189 const char *buf, size_t count)
191 struct lm80_data *data = dev_get_drvdata(dev);
192 struct i2c_client *client = data->client;
193 int index = to_sensor_dev_attr_2(attr)->index;
194 int nr = to_sensor_dev_attr_2(attr)->nr;
197 int err = kstrtol(buf, 10, &val);
201 reg = nr == i_min ? LM80_REG_IN_MIN(index) : LM80_REG_IN_MAX(index);
203 mutex_lock(&data->update_lock);
204 data->in[nr][index] = IN_TO_REG(val);
205 lm80_write_value(client, reg, data->in[nr][index]);
206 mutex_unlock(&data->update_lock);
210 #define show_fan(suffix, value) \
211 static ssize_t show_fan_##suffix(struct device *dev, \
212 struct device_attribute *attr, char *buf) \
214 int nr = to_sensor_dev_attr(attr)->index; \
215 struct lm80_data *data = lm80_update_device(dev); \
217 return PTR_ERR(data); \
218 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
219 DIV_FROM_REG(data->fan_div[nr]))); \
221 show_fan(min, fan_min)
224 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
227 int nr = to_sensor_dev_attr(attr)->index;
228 struct lm80_data *data = lm80_update_device(dev);
230 return PTR_ERR(data);
231 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
234 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
235 const char *buf, size_t count)
237 int nr = to_sensor_dev_attr(attr)->index;
238 struct lm80_data *data = dev_get_drvdata(dev);
239 struct i2c_client *client = data->client;
241 int err = kstrtoul(buf, 10, &val);
245 mutex_lock(&data->update_lock);
246 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
247 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
248 mutex_unlock(&data->update_lock);
253 * Note: we save and restore the fan minimum here, because its value is
254 * determined in part by the fan divisor. This follows the principle of
255 * least surprise; the user doesn't expect the fan minimum to change just
256 * because the divisor changed.
258 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
259 const char *buf, size_t count)
261 int nr = to_sensor_dev_attr(attr)->index;
262 struct lm80_data *data = dev_get_drvdata(dev);
263 struct i2c_client *client = data->client;
264 unsigned long min, val;
266 int err = kstrtoul(buf, 10, &val);
271 mutex_lock(&data->update_lock);
272 min = FAN_FROM_REG(data->fan_min[nr],
273 DIV_FROM_REG(data->fan_div[nr]));
277 data->fan_div[nr] = 0;
280 data->fan_div[nr] = 1;
283 data->fan_div[nr] = 2;
286 data->fan_div[nr] = 3;
290 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
292 mutex_unlock(&data->update_lock);
296 reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
297 | (data->fan_div[nr] << (2 * (nr + 1)));
298 lm80_write_value(client, LM80_REG_FANDIV, reg);
300 /* Restore fan_min */
301 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
302 lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
303 mutex_unlock(&data->update_lock);
308 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
311 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
312 struct lm80_data *data = lm80_update_device(dev);
314 return PTR_ERR(data);
315 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
318 static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
319 const char *buf, size_t count)
321 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
322 struct lm80_data *data = dev_get_drvdata(dev);
323 struct i2c_client *client = data->client;
324 int nr = attr->index;
326 int err = kstrtol(buf, 10, &val);
330 mutex_lock(&data->update_lock);
331 data->temp[nr] = TEMP_TO_REG(val);
332 lm80_write_value(client, temp_regs[nr], data->temp[nr] >> 8);
333 mutex_unlock(&data->update_lock);
337 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
340 struct lm80_data *data = lm80_update_device(dev);
342 return PTR_ERR(data);
343 return sprintf(buf, "%u\n", data->alarms);
346 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
349 int bitnr = to_sensor_dev_attr(attr)->index;
350 struct lm80_data *data = lm80_update_device(dev);
352 return PTR_ERR(data);
353 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
356 static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO,
357 show_in, set_in, i_min, 0);
358 static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO,
359 show_in, set_in, i_min, 1);
360 static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO,
361 show_in, set_in, i_min, 2);
362 static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO,
363 show_in, set_in, i_min, 3);
364 static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO,
365 show_in, set_in, i_min, 4);
366 static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO,
367 show_in, set_in, i_min, 5);
368 static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO,
369 show_in, set_in, i_min, 6);
370 static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO,
371 show_in, set_in, i_max, 0);
372 static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO,
373 show_in, set_in, i_max, 1);
374 static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO,
375 show_in, set_in, i_max, 2);
376 static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO,
377 show_in, set_in, i_max, 3);
378 static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO,
379 show_in, set_in, i_max, 4);
380 static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO,
381 show_in, set_in, i_max, 5);
382 static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO,
383 show_in, set_in, i_max, 6);
384 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, i_input, 0);
385 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, i_input, 1);
386 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, i_input, 2);
387 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, i_input, 3);
388 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, i_input, 4);
389 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, i_input, 5);
390 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, i_input, 6);
391 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
392 show_fan_min, set_fan_min, 0);
393 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
394 show_fan_min, set_fan_min, 1);
395 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
396 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
397 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
398 show_fan_div, set_fan_div, 0);
399 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
400 show_fan_div, set_fan_div, 1);
401 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input);
402 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp,
403 set_temp, t_hot_max);
404 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp,
405 set_temp, t_hot_hyst);
406 static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
408 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp,
409 set_temp, t_os_hyst);
410 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
411 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
412 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
413 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
414 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
415 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
416 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
417 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
418 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
419 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
420 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
421 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
427 static struct attribute *lm80_attrs[] = {
428 &sensor_dev_attr_in0_min.dev_attr.attr,
429 &sensor_dev_attr_in1_min.dev_attr.attr,
430 &sensor_dev_attr_in2_min.dev_attr.attr,
431 &sensor_dev_attr_in3_min.dev_attr.attr,
432 &sensor_dev_attr_in4_min.dev_attr.attr,
433 &sensor_dev_attr_in5_min.dev_attr.attr,
434 &sensor_dev_attr_in6_min.dev_attr.attr,
435 &sensor_dev_attr_in0_max.dev_attr.attr,
436 &sensor_dev_attr_in1_max.dev_attr.attr,
437 &sensor_dev_attr_in2_max.dev_attr.attr,
438 &sensor_dev_attr_in3_max.dev_attr.attr,
439 &sensor_dev_attr_in4_max.dev_attr.attr,
440 &sensor_dev_attr_in5_max.dev_attr.attr,
441 &sensor_dev_attr_in6_max.dev_attr.attr,
442 &sensor_dev_attr_in0_input.dev_attr.attr,
443 &sensor_dev_attr_in1_input.dev_attr.attr,
444 &sensor_dev_attr_in2_input.dev_attr.attr,
445 &sensor_dev_attr_in3_input.dev_attr.attr,
446 &sensor_dev_attr_in4_input.dev_attr.attr,
447 &sensor_dev_attr_in5_input.dev_attr.attr,
448 &sensor_dev_attr_in6_input.dev_attr.attr,
449 &sensor_dev_attr_fan1_min.dev_attr.attr,
450 &sensor_dev_attr_fan2_min.dev_attr.attr,
451 &sensor_dev_attr_fan1_input.dev_attr.attr,
452 &sensor_dev_attr_fan2_input.dev_attr.attr,
453 &sensor_dev_attr_fan1_div.dev_attr.attr,
454 &sensor_dev_attr_fan2_div.dev_attr.attr,
455 &sensor_dev_attr_temp1_input.dev_attr.attr,
456 &sensor_dev_attr_temp1_max.dev_attr.attr,
457 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
458 &sensor_dev_attr_temp1_crit.dev_attr.attr,
459 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
460 &dev_attr_alarms.attr,
461 &sensor_dev_attr_in0_alarm.dev_attr.attr,
462 &sensor_dev_attr_in1_alarm.dev_attr.attr,
463 &sensor_dev_attr_in2_alarm.dev_attr.attr,
464 &sensor_dev_attr_in3_alarm.dev_attr.attr,
465 &sensor_dev_attr_in4_alarm.dev_attr.attr,
466 &sensor_dev_attr_in5_alarm.dev_attr.attr,
467 &sensor_dev_attr_in6_alarm.dev_attr.attr,
468 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
469 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
470 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
471 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
474 ATTRIBUTE_GROUPS(lm80);
476 /* Return 0 if detection is successful, -ENODEV otherwise */
477 static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
479 struct i2c_adapter *adapter = client->adapter;
480 int i, cur, man_id, dev_id;
481 const char *name = NULL;
483 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
486 /* First check for unused bits, common to both chip types */
487 if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
488 || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
492 * The LM96080 has manufacturer and stepping/die rev registers so we
493 * can just check that. The LM80 does not have such registers so we
494 * have to use a more expensive trick.
496 man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
497 dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
498 if (man_id == 0x01 && dev_id == 0x08) {
499 /* Check more unused bits for confirmation */
500 if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
505 /* Check 6-bit addressing */
506 for (i = 0x2a; i <= 0x3d; i++) {
507 cur = i2c_smbus_read_byte_data(client, i);
508 if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
509 || (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
510 || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
517 strlcpy(info->type, name, I2C_NAME_SIZE);
522 static int lm80_probe(struct i2c_client *client,
523 const struct i2c_device_id *id)
525 struct device *dev = &client->dev;
526 struct device *hwmon_dev;
527 struct lm80_data *data;
529 data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL);
533 data->client = client;
534 mutex_init(&data->update_lock);
536 /* Initialize the LM80 chip */
537 lm80_init_client(client);
539 /* A few vars need to be filled upon startup */
540 data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
541 data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
543 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
546 return PTR_ERR_OR_ZERO(hwmon_dev);
549 static int lm80_read_value(struct i2c_client *client, u8 reg)
551 return i2c_smbus_read_byte_data(client, reg);
554 static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
556 return i2c_smbus_write_byte_data(client, reg, value);
559 /* Called when we have found a new LM80. */
560 static void lm80_init_client(struct i2c_client *client)
563 * Reset all except Watchdog values and last conversion values
564 * This sets fan-divs to 2, among others. This makes most other
565 * initializations unnecessary
567 lm80_write_value(client, LM80_REG_CONFIG, 0x80);
568 /* Set 11-bit temperature resolution */
569 lm80_write_value(client, LM80_REG_RES, 0x08);
571 /* Start monitoring */
572 lm80_write_value(client, LM80_REG_CONFIG, 0x01);
575 static struct lm80_data *lm80_update_device(struct device *dev)
577 struct lm80_data *data = dev_get_drvdata(dev);
578 struct i2c_client *client = data->client;
582 struct lm80_data *ret = data;
584 mutex_lock(&data->update_lock);
587 lm80_init_client(client);
589 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
590 dev_dbg(dev, "Starting lm80 update\n");
591 for (i = 0; i <= 6; i++) {
592 rv = lm80_read_value(client, LM80_REG_IN(i));
595 data->in[i_input][i] = rv;
597 rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
600 data->in[i_min][i] = rv;
602 rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
605 data->in[i_max][i] = rv;
608 rv = lm80_read_value(client, LM80_REG_FAN1);
613 rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
616 data->fan_min[0] = rv;
618 rv = lm80_read_value(client, LM80_REG_FAN2);
623 rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
626 data->fan_min[1] = rv;
628 prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
631 rv = lm80_read_value(client, LM80_REG_RES);
634 data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0);
636 for (i = t_input + 1; i < t_num_temp; i++) {
637 rv = lm80_read_value(client, temp_regs[i]);
640 data->temp[i] = rv << 8;
643 rv = lm80_read_value(client, LM80_REG_FANDIV);
646 data->fan_div[0] = (rv >> 2) & 0x03;
647 data->fan_div[1] = (rv >> 4) & 0x03;
649 prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
652 rv = lm80_read_value(client, LM80_REG_ALARM2);
655 data->alarms = prev_rv + (rv << 8);
657 data->last_updated = jiffies;
669 mutex_unlock(&data->update_lock);
674 module_i2c_driver(lm80_driver);
676 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
677 "Philip Edelbrock <phil@netroedge.com>");
678 MODULE_DESCRIPTION("LM80 driver");
679 MODULE_LICENSE("GPL");