aboutsummaryrefslogtreecommitdiff
path: root/drivers/hwmon/lm63.c
blob: 736126d73aa25e430e594ef76e0e3f58cbbb6eaf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
/*
 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
 *          with integrated fan control
 * Copyright (C) 2004-2005  Jean Delvare <khali@linux-fr.org>
 * Based on the lm90 driver.
 *
 * The LM63 is a sensor chip made by National Semiconductor. It measures
 * two temperatures (its own and one external one) and the speed of one
 * fan, those speed it can additionally control. Complete datasheet can be
 * obtained from National's website at:
 *   http://www.national.com/pf/LM/LM63.html
 *
 * The LM63 is basically an LM86 with fan speed monitoring and control
 * capabilities added. It misses some of the LM86 features though:
 *  - No low limit for local temperature.
 *  - No critical limit for local temperature.
 *  - Critical limit for remote temperature can be changed only once. We
 *    will consider that the critical limit is read-only.
 *
 * The datasheet isn't very clear about what the tachometer reading is.
 * I had a explanation from National Semiconductor though. The two lower
 * bits of the read value have to be masked out. The value is still 16 bit
 * in width.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon.h>
#include <linux/err.h>

/*
 * Addresses to scan
 * Address is fully defined internally and cannot be changed.
 */

static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };

/*
 * Insmod parameters
 */

SENSORS_INSMOD_1(lm63);

/*
 * The LM63 registers
 */

#define LM63_REG_CONFIG1		0x03
#define LM63_REG_CONFIG2		0xBF
#define LM63_REG_CONFIG_FAN		0x4A

#define LM63_REG_TACH_COUNT_MSB		0x47
#define LM63_REG_TACH_COUNT_LSB		0x46
#define LM63_REG_TACH_LIMIT_MSB		0x49
#define LM63_REG_TACH_LIMIT_LSB		0x48

#define LM63_REG_PWM_VALUE		0x4C
#define LM63_REG_PWM_FREQ		0x4D

#define LM63_REG_LOCAL_TEMP		0x00
#define LM63_REG_LOCAL_HIGH		0x05

#define LM63_REG_REMOTE_TEMP_MSB	0x01
#define LM63_REG_REMOTE_TEMP_LSB	0x10
#define LM63_REG_REMOTE_OFFSET_MSB	0x11
#define LM63_REG_REMOTE_OFFSET_LSB	0x12
#define LM63_REG_REMOTE_HIGH_MSB	0x07
#define LM63_REG_REMOTE_HIGH_LSB	0x13
#define LM63_REG_REMOTE_LOW_MSB		0x08
#define LM63_REG_REMOTE_LOW_LSB		0x14
#define LM63_REG_REMOTE_TCRIT		0x19
#define LM63_REG_REMOTE_TCRIT_HYST	0x21

#define LM63_REG_ALERT_STATUS		0x02
#define LM63_REG_ALERT_MASK		0x16

#define LM63_REG_MAN_ID			0xFE
#define LM63_REG_CHIP_ID		0xFF

/*
 * Conversions and various macros
 * For tachometer counts, the LM63 uses 16-bit values.
 * For local temperature and high limit, remote critical limit and hysteresis
 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
 * For remote temperature, low and high limits, it uses signed 11-bit values
 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 */

#define FAN_FROM_REG(reg)	((reg) == 0xFFFC || (reg) == 0 ? 0 : \
				 5400000 / (reg))
#define FAN_TO_REG(val)		((val) <= 82 ? 0xFFFC : \
				 (5400000 / (val)) & 0xFFFC)
#define TEMP8_FROM_REG(reg)	((reg) * 1000)
#define TEMP8_TO_REG(val)	((val) <= -128000 ? -128 : \
				 (val) >= 127000 ? 127 : \
				 (val) < 0 ? ((val) - 500) / 1000 : \
				 ((val) + 500) / 1000)
#define TEMP11_FROM_REG(reg)	((reg) / 32 * 125)
#define TEMP11_TO_REG(val)	((val) <= -128000 ? 0x8000 : \
				 (val) >= 127875 ? 0x7FE0 : \
				 (val) < 0 ? ((val) - 62) / 125 * 32 : \
				 ((val) + 62) / 125 * 32)
#define HYST_TO_REG(val)	((val) <= 0 ? 0 : \
				 (val) >= 127000 ? 127 : \
				 ((val) + 500) / 1000)

/*
 * Functions declaration
 */

static int lm63_attach_adapter(struct i2c_adapter *adapter);
static int lm63_detach_client(struct i2c_client *client);

static struct lm63_data *lm63_update_device(struct device *dev);

static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
static void lm63_init_client(struct i2c_client *client);

/*
 * Driver data (common to all clients)
 */

static struct i2c_driver lm63_driver = {
	.owner		= THIS_MODULE,
	.name		= "lm63",
	.flags		= I2C_DF_NOTIFY,
	.attach_adapter	= lm63_attach_adapter,
	.detach_client	= lm63_detach_client,
};

/*
 * Client data (each client gets its own)
 */

struct lm63_data {
	struct i2c_client client;
	struct class_device *class_dev;
	struct semaphore update_lock;
	char valid; /* zero until following fields are valid */
	unsigned long last_updated; /* in jiffies */

	/* registers values */
	u8 config, config_fan;
	u16 fan[2];	/* 0: input
			   1: low limit */
	u8 pwm1_freq;
	u8 pwm1_value;
	s8 temp8[3];	/* 0: local input
			   1: local high limit
			   2: remote critical limit */
	s16 temp11[3];	/* 0: remote input
			   1: remote low limit
			   2: remote high limit */
	u8 temp2_crit_hyst;
	u8 alarms;
};

/*
 * Sysfs callback functions and files
 */

static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
			char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
}

static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
		       const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct lm63_data *data = i2c_get_clientdata(client);
	unsigned long val = simple_strtoul(buf, NULL, 10);

	down(&data->update_lock);
	data->fan[1] = FAN_TO_REG(val);
	i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
				  data->fan[1] & 0xFF);
	i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
				  data->fan[1] >> 8);
	up(&data->update_lock);
	return count;
}

static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
			 char *buf)
{
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
		       255 : (data->pwm1_value * 255 + data->pwm1_freq) /
		       (2 * data->pwm1_freq));
}

static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
			const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct lm63_data *data = i2c_get_clientdata(client);
	unsigned long val;
	
	if (!(data->config_fan & 0x20)) /* register is read-only */
		return -EPERM;

	val = simple_strtoul(buf, NULL, 10);
	down(&data->update_lock);
	data->pwm1_value = val <= 0 ? 0 :
			   val >= 255 ? 2 * data->pwm1_freq :
			   (val * data->pwm1_freq * 2 + 127) / 255;
	i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
	up(&data->update_lock);
	return count;
}

static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
				char *buf)
{
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
}

static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
			  char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
}

static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
			 const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct lm63_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	down(&data->update_lock);
	data->temp8[1] = TEMP8_TO_REG(val);
	i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
	up(&data->update_lock);
	return count;
}

static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
			   char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
}

static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
			  const char *buf, size_t count)
{
	static const u8 reg[4] = {
		LM63_REG_REMOTE_LOW_MSB,
		LM63_REG_REMOTE_LOW_LSB,
		LM63_REG_REMOTE_HIGH_MSB,
		LM63_REG_REMOTE_HIGH_LSB,
	};

	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct i2c_client *client = to_i2c_client(dev);
	struct lm63_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);
	int nr = attr->index;

	down(&data->update_lock);
	data->temp11[nr] = TEMP11_TO_REG(val);
	i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
				  data->temp11[nr] >> 8);
	i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
				  data->temp11[nr] & 0xff);
	up(&data->update_lock);
	return count;
}

/* Hysteresis register holds a relative value, while we want to present
   an absolute to user-space */
static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
				    char *buf)
{
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
		       - TEMP8_FROM_REG(data->temp2_crit_hyst));
}

/* And now the other way around, user-space provides an absolute
   hysteresis value and we have to store a relative one */
static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
				   const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct lm63_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);
	long hyst;

	down(&data->update_lock);
	hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
	i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
				  HYST_TO_REG(hyst));
	up(&data->update_lock);
	return count;
}

static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
			   char *buf)
{
	struct lm63_data *data = lm63_update_device(dev);
	return sprintf(buf, "%u\n", data->alarms);
}

static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
	set_fan, 1);

static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, 1);

static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 1);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 2);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
	set_temp2_crit_hyst);

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);

/*
 * Real code
 */

static int lm63_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_detect(adapter, &addr_data, lm63_detect);
}

/*
 * The following function does more than just detection. If detection
 * succeeds, it also registers the new chip.
 */
static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *new_client;
	struct lm63_data *data;
	int err = 0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		goto exit;

	if (!(data = kmalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}
	memset(data, 0, sizeof(struct lm63_data));

	/* The common I2C client data is placed right before the
	   LM63-specific data. */
	new_client = &data->client;
	i2c_set_clientdata(new_client, data);
	new_client->addr = address;
	new_client->adapter = adapter;
	new_client->driver = &lm63_driver;
	new_client->flags = 0;

	/* Default to an LM63 if forced */
	if (kind == 0)
		kind = lm63;

	if (kind < 0) { /* must identify */
		u8 man_id, chip_id, reg_config1, reg_config2;
		u8 reg_alert_status, reg_alert_mask;

		man_id = i2c_smbus_read_byte_data(new_client,
			 LM63_REG_MAN_ID);
		chip_id = i2c_smbus_read_byte_data(new_client,
			  LM63_REG_CHIP_ID);
		reg_config1 = i2c_smbus_read_byte_data(new_client,
			      LM63_REG_CONFIG1);
		reg_config2 = i2c_smbus_read_byte_data(new_client,
			      LM63_REG_CONFIG2);
		reg_alert_status = i2c_smbus_read_byte_data(new_client,
				   LM63_REG_ALERT_STATUS);
		reg_alert_mask = i2c_smbus_read_byte_data(new_client,
				 LM63_REG_ALERT_MASK);

		if (man_id == 0x01 /* National Semiconductor */
		 && chip_id == 0x41 /* LM63 */
		 && (reg_config1 & 0x18) == 0x00
		 && (reg_config2 & 0xF8) == 0x00
		 && (reg_alert_status & 0x20) == 0x00
		 && (reg_alert_mask & 0xA4) == 0xA4) {
			kind = lm63;
		} else { /* failed */
			dev_dbg(&adapter->dev, "Unsupported chip "
				"(man_id=0x%02X, chip_id=0x%02X).\n",
				man_id, chip_id);
			goto exit_free;
		}
	}

	strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
	data->valid = 0;
	init_MUTEX(&data->update_lock);

	/* Tell the I2C layer a new client has arrived */
	if ((err = i2c_attach_client(new_client)))
		goto exit_free;

	/* Initialize the LM63 chip */
	lm63_init_client(new_client);

	/* Register sysfs hooks */
	data->class_dev = hwmon_device_register(&new_client->dev);
	if (IS_ERR(data->class_dev)) {
		err = PTR_ERR(data->class_dev);
		goto exit_detach;
	}

	if (data->config & 0x04) { /* tachometer enabled */
		device_create_file(&new_client->dev,
				   &sensor_dev_attr_fan1_input.dev_attr);
		device_create_file(&new_client->dev,
				   &sensor_dev_attr_fan1_min.dev_attr);
	}
	device_create_file(&new_client->dev, &dev_attr_pwm1);
	device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
	device_create_file(&new_client->dev,
			   &sensor_dev_attr_temp1_input.dev_attr);
	device_create_file(&new_client->dev,
			   &sensor_dev_attr_temp2_input.dev_attr);
	device_create_file(&new_client->dev,
			   &sensor_dev_attr_temp2_min.dev_attr);
	device_create_file(&new_client->dev,
			   &sensor_dev_attr_temp1_max.dev_attr);
	device_create_file(&new_client->dev,
			   &sensor_dev_attr_temp2_max.dev_attr);
	device_create_file(&new_client->dev,
			   &sensor_dev_attr_temp2_crit.dev_attr);
	device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst);
	device_create_file(&new_client->dev, &dev_attr_alarms);

	return 0;

exit_detach:
	i2c_detach_client(new_client);
exit_free:
	kfree(data);
exit:
	return err;
}

/* Idealy we shouldn't have to initialize anything, since the BIOS
   should have taken care of everything */
static void lm63_init_client(struct i2c_client *client)
{
	struct lm63_data *data = i2c_get_clientdata(client);

	data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
	data->config_fan = i2c_smbus_read_byte_data(client,
						    LM63_REG_CONFIG_FAN);

	/* Start converting if needed */
	if (data->config & 0x40) { /* standby */
		dev_dbg(&client->dev, "Switching to operational mode");
		data->config &= 0xA7;
		i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
					  data->config);
	}

	/* We may need pwm1_freq before ever updating the client data */
	data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
	if (data->pwm1_freq == 0)
		data->pwm1_freq = 1;

	/* Show some debug info about the LM63 configuration */
	dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
		(data->config & 0x04) ? "tachometer input" :
		"alert output");
	dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
		(data->config_fan & 0x08) ? "1.4" : "360",
		((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
	dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
		(data->config_fan & 0x10) ? "low" : "high",
		(data->config_fan & 0x20) ? "manual" : "auto");
}

static int lm63_detach_client(struct i2c_client *client)
{
	struct lm63_data *data = i2c_get_clientdata(client);
	int err;

	hwmon_device_unregister(data->class_dev);

	if ((err = i2c_detach_client(client)))
		return err;

	kfree(data);
	return 0;
}

static struct lm63_data *lm63_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct lm63_data *data = i2c_get_clientdata(client);

	down(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
		if (data->config & 0x04) { /* tachometer enabled  */
			/* order matters for fan1_input */
			data->fan[0] = i2c_smbus_read_byte_data(client,
				       LM63_REG_TACH_COUNT_LSB) & 0xFC;
			data->fan[0] |= i2c_smbus_read_byte_data(client,
					LM63_REG_TACH_COUNT_MSB) << 8;
			data->fan[1] = (i2c_smbus_read_byte_data(client,
					LM63_REG_TACH_LIMIT_LSB) & 0xFC)
				     | (i2c_smbus_read_byte_data(client,
					LM63_REG_TACH_LIMIT_MSB) << 8);
		}

		data->pwm1_freq = i2c_smbus_read_byte_data(client,
				  LM63_REG_PWM_FREQ);
		if (data->pwm1_freq == 0)
			data->pwm1_freq = 1;
		data->pwm1_value = i2c_smbus_read_byte_data(client,
				   LM63_REG_PWM_VALUE);

		data->temp8[0] = i2c_smbus_read_byte_data(client,
				 LM63_REG_LOCAL_TEMP);
		data->temp8[1] = i2c_smbus_read_byte_data(client,
				 LM63_REG_LOCAL_HIGH);

		/* order matters for temp2_input */
		data->temp11[0] = i2c_smbus_read_byte_data(client,
				  LM63_REG_REMOTE_TEMP_MSB) << 8;
		data->temp11[0] |= i2c_smbus_read_byte_data(client,
				   LM63_REG_REMOTE_TEMP_LSB);
		data->temp11[1] = (i2c_smbus_read_byte_data(client,
				  LM63_REG_REMOTE_LOW_MSB) << 8)
				| i2c_smbus_read_byte_data(client,
				  LM63_REG_REMOTE_LOW_LSB);
		data->temp11[2] = (i2c_smbus_read_byte_data(client,
				  LM63_REG_REMOTE_HIGH_MSB) << 8)
				| i2c_smbus_read_byte_data(client,
				  LM63_REG_REMOTE_HIGH_LSB);
		data->temp8[2] = i2c_smbus_read_byte_data(client,
				 LM63_REG_REMOTE_TCRIT);
		data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
					LM63_REG_REMOTE_TCRIT_HYST);

		data->alarms = i2c_smbus_read_byte_data(client,
			       LM63_REG_ALERT_STATUS) & 0x7F;

		data->last_updated = jiffies;
		data->valid = 1;
	}

	up(&data->update_lock);

	return data;
}

static int __init sensors_lm63_init(void)
{
	return i2c_add_driver(&lm63_driver);
}

static void __exit sensors_lm63_exit(void)
{
	i2c_del_driver(&lm63_driver);
}

MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("LM63 driver");
MODULE_LICENSE("GPL");

module_init(sensors_lm63_init);
module_exit(sensors_lm63_exit);