summaryrefslogtreecommitdiff
path: root/drivers/hwmon/smsc47m192.c
blob: bdc4570acf9a868893c2de71709c51dd0d639a7e (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
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
/*
    smsc47m192.c - Support for hardware monitoring block of
                   SMSC LPC47M192 and LPC47M997 Super I/O chips

    Copyright (C) 2006  Hartmut Rick <linux@rick.claranet.de>

    Derived from lm78.c and other chip drivers.

    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/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>

/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_1(smsc47m192);

/* SMSC47M192 registers */
#define SMSC47M192_REG_IN(nr)		((nr)<6 ? (0x20 + (nr)) : \
					(0x50 + (nr) - 6))
#define SMSC47M192_REG_IN_MAX(nr)	((nr)<6 ? (0x2b + (nr) * 2) : \
					(0x54 + (((nr) - 6) * 2)))
#define SMSC47M192_REG_IN_MIN(nr)	((nr)<6 ? (0x2c + (nr) * 2) : \
					(0x55 + (((nr) - 6) * 2)))
static u8 SMSC47M192_REG_TEMP[3] =	{ 0x27, 0x26, 0x52 };
static u8 SMSC47M192_REG_TEMP_MAX[3] =	{ 0x39, 0x37, 0x58 };
static u8 SMSC47M192_REG_TEMP_MIN[3] =	{ 0x3A, 0x38, 0x59 };
#define SMSC47M192_REG_TEMP_OFFSET(nr)	((nr)==2 ? 0x1e : 0x1f)
#define SMSC47M192_REG_ALARM1		0x41
#define SMSC47M192_REG_ALARM2		0x42
#define SMSC47M192_REG_VID		0x47
#define SMSC47M192_REG_VID4		0x49
#define SMSC47M192_REG_CONFIG		0x40
#define SMSC47M192_REG_SFR		0x4f
#define SMSC47M192_REG_COMPANY_ID	0x3e
#define SMSC47M192_REG_VERSION		0x3f

/* generalised scaling with integer rounding */
static inline int SCALE(long val, int mul, int div)
{
	if (val < 0)
		return (val * mul - div / 2) / div;
	else
		return (val * mul + div / 2) / div;
}

/* Conversions */

/* smsc47m192 internally scales voltage measurements */
static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };

static inline unsigned int IN_FROM_REG(u8 reg, int n)
{
	return SCALE(reg, nom_mv[n], 192);
}

static inline u8 IN_TO_REG(unsigned long val, int n)
{
	return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
}

/* TEMP: 0.001 degC units (-128C to +127C)
   REG: 1C/bit, two's complement */
static inline s8 TEMP_TO_REG(int val)
{
	return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
}

static inline int TEMP_FROM_REG(s8 val)
{
	return val * 1000;
}

struct smsc47m192_data {
	struct i2c_client client;
	struct class_device *class_dev;
	struct semaphore update_lock;
	char valid;		/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */

	u8 in[8];		/* Register value */
	u8 in_max[8];		/* Register value */
	u8 in_min[8];		/* Register value */
	s8 temp[3];		/* Register value */
	s8 temp_max[3];		/* Register value */
	s8 temp_min[3];		/* Register value */
	s8 temp_offset[3];	/* Register value */
	u16 alarms;		/* Register encoding, combined */
	u8 vid;			/* Register encoding, combined */
	u8 vrm;
};

static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
		int kind);
static int smsc47m192_detach_client(struct i2c_client *client);
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);

static struct i2c_driver smsc47m192_driver = {
	.driver = {
		.name	= "smsc47m192",
	},
	.attach_adapter	= smsc47m192_attach_adapter,
	.detach_client	= smsc47m192_detach_client,
};

/* Voltages */
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
}

static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
}

static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
}

static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	unsigned long val = simple_strtoul(buf, NULL, 10);

	down(&data->update_lock);
	data->in_min[nr] = IN_TO_REG(val, nr);
	i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
							data->in_min[nr]);
	up(&data->update_lock);
	return count;
}

static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	unsigned long val = simple_strtoul(buf, NULL, 10);

	down(&data->update_lock);
	data->in_max[nr] = IN_TO_REG(val, nr);
	i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
							data->in_max[nr]);
	up(&data->update_lock);
	return count;
}

#define show_in_offset(offset)					\
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,		\
		show_in, NULL, offset);				\
static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,	\
		show_in_min, set_in_min, offset);		\
static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,	\
		show_in_max, set_in_max, offset);

show_in_offset(0)
show_in_offset(1)
show_in_offset(2)
show_in_offset(3)
show_in_offset(4)
show_in_offset(5)
show_in_offset(6)
show_in_offset(7)

/* Temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
}

static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
}

static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
}

static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	down(&data->update_lock);
	data->temp_min[nr] = TEMP_TO_REG(val);
	i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
						data->temp_min[nr]);
	up(&data->update_lock);
	return count;
}

static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	down(&data->update_lock);
	data->temp_max[nr] = TEMP_TO_REG(val);
	i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
						data->temp_max[nr]);
	up(&data->update_lock);
	return count;
}

static ssize_t show_temp_offset(struct device *dev, struct device_attribute
		*attr, char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
}

static ssize_t set_temp_offset(struct device *dev, struct device_attribute
		*attr, const char *buf, size_t count)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
	long val = simple_strtol(buf, NULL, 10);

	down(&data->update_lock);
	data->temp_offset[nr] = TEMP_TO_REG(val);
	if (nr>1)
		i2c_smbus_write_byte_data(client,
			SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
	else if (data->temp_offset[nr] != 0) {
		/* offset[0] and offset[1] share the same register,
			SFR bit 4 activates offset[0] */
		i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
					(sfr & 0xef) | (nr==0 ? 0x10 : 0));
		data->temp_offset[1-nr] = 0;
		i2c_smbus_write_byte_data(client,
			SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
	} else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
		i2c_smbus_write_byte_data(client,
					SMSC47M192_REG_TEMP_OFFSET(nr), 0);
	up(&data->update_lock);
	return count;
}

#define show_temp_index(index)						\
static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO,			\
		show_temp, NULL, index-1);				\
static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR,		\
		show_temp_min, set_temp_min, index-1);			\
static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR,		\
		show_temp_max, set_temp_max, index-1);			\
static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR,	\
		show_temp_offset, set_temp_offset, index-1);

show_temp_index(1)
show_temp_index(2)
show_temp_index(3)

/* VID */
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);

static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%d\n", data->vrm);
}

static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	data->vrm = simple_strtoul(buf, NULL, 10);
	return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);

/* Alarms */
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
	int nr = sensor_attr->index;
	struct smsc47m192_data *data = smsc47m192_update_device(dev);
	return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
}

static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 0x4000);
static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 0x8000);
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);

/* This function is called when:
    * smsc47m192_driver is inserted (when this module is loaded), for each
      available adapter
    * when a new adapter is inserted (and smsc47m192_driver is still present) */
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, smsc47m192_detect);
}

static void smsc47m192_init_client(struct i2c_client *client)
{
	int i;
	u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
	u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);

	/* select cycle mode (pause 1 sec between updates) */
	i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
						(sfr & 0xfd) | 0x02);
	if (!(config & 0x01)) {
		/* initialize alarm limits */
		for (i=0; i<8; i++) {
			i2c_smbus_write_byte_data(client,
				SMSC47M192_REG_IN_MIN(i), 0);
			i2c_smbus_write_byte_data(client,
				SMSC47M192_REG_IN_MAX(i), 0xff);
		}
		for (i=0; i<3; i++) {
			i2c_smbus_write_byte_data(client,
				SMSC47M192_REG_TEMP_MIN[i], 0x80);
			i2c_smbus_write_byte_data(client,
				SMSC47M192_REG_TEMP_MAX[i], 0x7f);
		}

		/* start monitoring */
		i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
						(config & 0xf7) | 0x01);
	}
}

/* This function is called by i2c_probe */
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
		int kind)
{
	struct i2c_client *client;
	struct smsc47m192_data *data;
	int err = 0;
	int version, config;

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

	if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	client = &data->client;
	i2c_set_clientdata(client, data);
	client->addr = address;
	client->adapter = adapter;
	client->driver = &smsc47m192_driver;

	if (kind == 0)
		kind = smsc47m192;

	/* Detection criteria from sensors_detect script */
	if (kind < 0) {
		if (i2c_smbus_read_byte_data(client,
				SMSC47M192_REG_COMPANY_ID) == 0x55
		 && ((version = i2c_smbus_read_byte_data(client,
				SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
		 && (i2c_smbus_read_byte_data(client,
				SMSC47M192_REG_VID) & 0x70) == 0x00
		 && (i2c_smbus_read_byte_data(client,
				SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
			dev_info(&adapter->dev,
				 "found SMSC47M192 or SMSC47M997, "
				 "version 2, stepping A%d\n", version & 0x0f);
		} else {
			dev_dbg(&adapter->dev,
				"SMSC47M192 detection failed at 0x%02x\n",
				address);
			goto exit_free;
		}
	}

	/* Fill in the remaining client fields and put into the global list */
	strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
	data->vrm = vid_which_vrm();
	init_MUTEX(&data->update_lock);

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

	/* Initialize the SMSC47M192 chip */
	smsc47m192_init_client(client);

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

	device_create_file(&client->dev, &sensor_dev_attr_in0_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in0_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in0_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in0_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in1_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in1_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in1_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in1_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in2_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in2_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in2_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in2_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in3_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in3_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in3_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in3_alarm.dev_attr);

	/* Pin 110 is either in4 (+12V) or VID4 */
	config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
	if (!(config & 0x20)) {
		device_create_file(&client->dev,
				   &sensor_dev_attr_in4_input.dev_attr);
		device_create_file(&client->dev,
				   &sensor_dev_attr_in4_min.dev_attr);
		device_create_file(&client->dev,
				   &sensor_dev_attr_in4_max.dev_attr);
		device_create_file(&client->dev,
				   &sensor_dev_attr_in4_alarm.dev_attr);
	}
	device_create_file(&client->dev, &sensor_dev_attr_in5_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in5_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in5_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in5_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in6_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in6_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in6_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in6_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in7_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in7_min.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in7_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_in7_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp1_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp1_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp1_min.dev_attr);
	device_create_file(&client->dev,
			   &sensor_dev_attr_temp1_offset.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp1_alarm.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp2_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp2_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp2_min.dev_attr);
	device_create_file(&client->dev,
			   &sensor_dev_attr_temp2_offset.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp2_alarm.dev_attr);
	device_create_file(&client->dev,
			   &sensor_dev_attr_temp2_input_fault.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp3_input.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp3_max.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp3_min.dev_attr);
	device_create_file(&client->dev,
			   &sensor_dev_attr_temp3_offset.dev_attr);
	device_create_file(&client->dev, &sensor_dev_attr_temp3_alarm.dev_attr);
	device_create_file(&client->dev,
			   &sensor_dev_attr_temp3_input_fault.dev_attr);
	device_create_file(&client->dev, &dev_attr_cpu0_vid);
	device_create_file(&client->dev, &dev_attr_vrm);

	return 0;

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

static int smsc47m192_detach_client(struct i2c_client *client)
{
	struct smsc47m192_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 smsc47m192_data *smsc47m192_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct smsc47m192_data *data = i2c_get_clientdata(client);
	int i, config;

	down(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	 || !data->valid) {
		u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);

		dev_dbg(&client->dev, "Starting smsc47m192 update\n");

		for (i = 0; i <= 7; i++) {
			data->in[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_IN(i));
			data->in_min[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_IN_MIN(i));
			data->in_max[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_IN_MAX(i));
		}
		for (i = 0; i < 3; i++) {
			data->temp[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_TEMP[i]);
			data->temp_max[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_TEMP_MAX[i]);
			data->temp_min[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_TEMP_MIN[i]);
		}
		for (i = 1; i < 3; i++)
			data->temp_offset[i] = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_TEMP_OFFSET(i));
		/* first offset is temp_offset[0] if SFR bit 4 is set,
					temp_offset[1] otherwise */
		if (sfr & 0x10) {
			data->temp_offset[0] = data->temp_offset[1];
			data->temp_offset[1] = 0;
		} else
			data->temp_offset[0] = 0;

		data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
			    & 0x0f;
		config = i2c_smbus_read_byte_data(client,
						  SMSC47M192_REG_CONFIG);
		if (config & 0x20)
			data->vid |= (i2c_smbus_read_byte_data(client,
					SMSC47M192_REG_VID4) & 0x01) << 4;
		data->alarms = i2c_smbus_read_byte_data(client,
						SMSC47M192_REG_ALARM1) |
			       (i2c_smbus_read_byte_data(client,
		       				SMSC47M192_REG_ALARM2) << 8);

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

	up(&data->update_lock);

	return data;
}

static int __init smsc47m192_init(void)
{
	return i2c_add_driver(&smsc47m192_driver);
}

static void __exit smsc47m192_exit(void)
{
	i2c_del_driver(&smsc47m192_driver);
}

MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
MODULE_DESCRIPTION("SMSC47M192 driver");
MODULE_LICENSE("GPL");

module_init(smsc47m192_init);
module_exit(smsc47m192_exit);