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lm80.c @ 2784

Revision 2784, 18.3 KB (checked in by khali, 9 years ago)
Restore controlling_mod argument to i2c_register_entry(). This is needed to properly lock chip drivers in memory while anyone uses their /proc entries. This also brings back compatibility with the 2.4 Linux kernel.
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1	/*
2	lm80.c - Part of lm_sensors, Linux kernel modules for hardware
3	monitoring
4	Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5	and Philip Edelbrock <phil@netroedge.com>
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20	*/
21
22	#include <linux/module.h>
23	#include <linux/slab.h>
24	#include <linux/i2c.h>
25	#include <linux/i2c-proc.h>
26	#include <linux/init.h>
27	#include "version.h"
28
29	MODULE_LICENSE("GPL");
30
31	/* Addresses to scan */
32	static unsigned short normal_i2c[] = { SENSORS_I2C_END };
33	static unsigned short normal_i2c_range[] = { 0x20, 0x2f, SENSORS_I2C_END };
34	static unsigned int normal_isa[] = { SENSORS_ISA_END };
35	static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
36
37	/* Insmod parameters */
38	SENSORS_INSMOD_1(lm80);
39
40	/* Many LM80 constants specified below */
41
42	/* The LM80 registers */
43	#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
44	#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
45	#define LM80_REG_IN(nr) (0x20 + (nr))
46
47	#define LM80_REG_FAN1_MIN 0x3c
48	#define LM80_REG_FAN2_MIN 0x3d
49	#define LM80_REG_FAN1 0x28
50	#define LM80_REG_FAN2 0x29
51
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
57
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
65
66
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. */
71
72	#define IN_TO_REG(val) (SENSORS_LIMIT((val),0,255))
73	#define IN_FROM_REG(val) (val)
74
75	static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
76	{
77	if (rpm == 0)
78	return 255;
79	rpm = SENSORS_LIMIT(rpm, 1, 1000000);
80	return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
81	254);
82	}
83
84	#define FAN_FROM_REG(val,div) ((val)==0?-1:\
85	(val)==255?0:1350000/((div)*(val)))
86
87	static inline long TEMP_FROM_REG(u16 temp)
88	{
89	long res;
90
91	temp >>= 4;
92	if (temp < 0x0800)
93	res = 625 * (long) temp;
94	else
95	res = ((long) temp - 0x01000) * 625;
96
97	return res / 100;
98	}
99
100	#define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*100)
101
102	#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT(((val)<0?(((val)-50)/100):\
103	((val)+50)/100), \
104	0,255)
105
106	#define ALARMS_FROM_REG(val) (val)
107
108	#define DIV_FROM_REG(val) (1 << (val))
109	#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
110
111	struct lm80_data {
112	struct i2c_client client;
113	int sysctl_id;
114
115	struct semaphore update_lock;
116	char valid; /* !=0 if following fields are valid */
117	unsigned long last_updated; /* In jiffies */
118
119	u8 in[7]; /* Register value */
120	u8 in_max[7]; /* Register value */
121	u8 in_min[7]; /* Register value */
122	u8 fan[2]; /* Register value */
123	u8 fan_min[2]; /* Register value */
124	u8 fan_div[2]; /* Register encoding, shifted right */
125	u16 temp; /* Register values, shifted right */
126	u8 temp_hot_max; /* Register value */
127	u8 temp_hot_hyst; /* Register value */
128	u8 temp_os_max; /* Register value */
129	u8 temp_os_hyst; /* Register value */
130	u16 alarms; /* Register encoding, combined */
131	};
132
133
134
135	static int lm80_attach_adapter(struct i2c_adapter *adapter);
136	static int lm80_detect(struct i2c_adapter *adapter, int address,
137	unsigned short flags, int kind);
138	static int lm80_detach_client(struct i2c_client *client);
139
140	static int lm80_read_value(struct i2c_client *client, u8 reg);
141	static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
142	static void lm80_update_client(struct i2c_client *client);
143	static void lm80_init_client(struct i2c_client *client);
144
145
146	static void lm80_in(struct i2c_client *client, int operation, int ctl_name,
147	int nrels_mag, long results);
148	static void lm80_fan(struct i2c_client *client, int operation,
149	int ctl_name, int nrels_mag, long results);
150	static void lm80_temp(struct i2c_client *client, int operation,
151	int ctl_name, int nrels_mag, long results);
152	static void lm80_alarms(struct i2c_client *client, int operation,
153	int ctl_name, int nrels_mag, long results);
154	static void lm80_fan_div(struct i2c_client *client, int operation,
155	int ctl_name, int nrels_mag, long results);
156
157	static int lm80_id = 0;
158
159	static struct i2c_driver lm80_driver = {
160	.name = "LM80 sensor driver",
161	.id = I2C_DRIVERID_LM80,
162	.flags = I2C_DF_NOTIFY,
163	.attach_adapter = lm80_attach_adapter,
164	.detach_client = lm80_detach_client,
165	};
166
167	/* The /proc/sys entries */
168
169	/* -- SENSORS SYSCTL START -- */
170
171	#define LM80_SYSCTL_IN0 1000 /* Volts * 100 */
172	#define LM80_SYSCTL_IN1 1001
173	#define LM80_SYSCTL_IN2 1002
174	#define LM80_SYSCTL_IN3 1003
175	#define LM80_SYSCTL_IN4 1004
176	#define LM80_SYSCTL_IN5 1005
177	#define LM80_SYSCTL_IN6 1006
178	#define LM80_SYSCTL_FAN1 1101 /* Rotations/min */
179	#define LM80_SYSCTL_FAN2 1102
180	#define LM80_SYSCTL_TEMP 1250 /* Degrees Celcius * 100 */
181	#define LM80_SYSCTL_FAN_DIV 2000 /* 1, 2, 4 or 8 */
182	#define LM80_SYSCTL_ALARMS 2001 /* bitvector */
183
184	#define LM80_ALARM_IN0 0x0001
185	#define LM80_ALARM_IN1 0x0002
186	#define LM80_ALARM_IN2 0x0004
187	#define LM80_ALARM_IN3 0x0008
188	#define LM80_ALARM_IN4 0x0010
189	#define LM80_ALARM_IN5 0x0020
190	#define LM80_ALARM_IN6 0x0040
191	#define LM80_ALARM_FAN1 0x0400
192	#define LM80_ALARM_FAN2 0x0800
193	#define LM80_ALARM_TEMP_HOT 0x0100
194	#define LM80_ALARM_TEMP_OS 0x2000
195	#define LM80_ALARM_CHAS 0x1000
196	#define LM80_ALARM_BTI 0x0200
197	#define LM80_ALARM_INT_IN 0x0080
198
199	/* -- SENSORS SYSCTL END -- */
200
201	/* These files are created for each detected LM80. This is just a template;
202	though at first sight, you might think we could use a statically
203	allocated list, we need some way to get back to the parent - which
204	is done through one of the 'extra' fields which are initialized
205	when a new copy is allocated. */
206	static ctl_table lm80_dir_table_template[] = {
207	{LM80_SYSCTL_IN0, "in0", NULL, 0, 0644, NULL, &i2c_proc_real,
208	&i2c_sysctl_real, NULL, &lm80_in},
209	{LM80_SYSCTL_IN1, "in1", NULL, 0, 0644, NULL, &i2c_proc_real,
210	&i2c_sysctl_real, NULL, &lm80_in},
211	{LM80_SYSCTL_IN2, "in2", NULL, 0, 0644, NULL, &i2c_proc_real,
212	&i2c_sysctl_real, NULL, &lm80_in},
213	{LM80_SYSCTL_IN3, "in3", NULL, 0, 0644, NULL, &i2c_proc_real,
214	&i2c_sysctl_real, NULL, &lm80_in},
215	{LM80_SYSCTL_IN4, "in4", NULL, 0, 0644, NULL, &i2c_proc_real,
216	&i2c_sysctl_real, NULL, &lm80_in},
217	{LM80_SYSCTL_IN5, "in5", NULL, 0, 0644, NULL, &i2c_proc_real,
218	&i2c_sysctl_real, NULL, &lm80_in},
219	{LM80_SYSCTL_IN6, "in6", NULL, 0, 0644, NULL, &i2c_proc_real,
220	&i2c_sysctl_real, NULL, &lm80_in},
221	{LM80_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &i2c_proc_real,
222	&i2c_sysctl_real, NULL, &lm80_fan},
223	{LM80_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &i2c_proc_real,
224	&i2c_sysctl_real, NULL, &lm80_fan},
225	{LM80_SYSCTL_TEMP, "temp", NULL, 0, 0644, NULL, &i2c_proc_real,
226	&i2c_sysctl_real, NULL, &lm80_temp},
227	{LM80_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL, &i2c_proc_real,
228	&i2c_sysctl_real, NULL, &lm80_fan_div},
229	{LM80_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
230	&i2c_sysctl_real, NULL, &lm80_alarms},
231	{0}
232	};
233
234	static int lm80_attach_adapter(struct i2c_adapter *adapter)
235	{
236	return i2c_detect(adapter, &addr_data, lm80_detect);
237	}
238
239	int lm80_detect(struct i2c_adapter *adapter, int address,
240	unsigned short flags, int kind)
241	{
242	int i, cur;
243	struct i2c_client *new_client;
244	struct lm80_data *data;
245	int err = 0;
246	const char type_name, client_name;
247
248	/* Make sure we aren't probing the ISA bus!! This is just a safety check
249	at this moment; i2c_detect really won't call us. */
250	#ifdef DEBUG
251	if (i2c_is_isa_adapter(adapter)) {
252	printk
253	("lm80.o: lm80_detect called for an ISA bus adapter?!?\n");
254	return 0;
255	}
256	#endif
257
258	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
259	goto ERROR0;
260
261	/* OK. For now, we presume we have a valid client. We now create the
262	client structure, even though we cannot fill it completely yet.
263	But it allows us to access lm80_{read,write}_value. */
264	if (!(data = kmalloc(sizeof(struct lm80_data), GFP_KERNEL))) {
265	err = -ENOMEM;
266	goto ERROR0;
267	}
268
269	new_client = &data->client;
270	new_client->addr = address;
271	new_client->data = data;
272	new_client->adapter = adapter;
273	new_client->driver = &lm80_driver;
274	new_client->flags = 0;
275
276	/* Now, we do the remaining detection. It is lousy. */
277	if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
278	goto ERROR1;
279	for (i = 0x2a; i <= 0x3d; i++) {
280	cur = i2c_smbus_read_byte_data(new_client, i);
281	if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
282	\|\| (i2c_smbus_read_byte_data(new_client, i + 0x80) !=
283	cur)
284	\|\| (i2c_smbus_read_byte_data(new_client, i + 0xc0) !=
285	cur)) goto ERROR1;
286	}
287
288	/* Determine the chip type - only one kind supported! */
289	if (kind <= 0)
290	kind = lm80;
291
292	if (kind == lm80) {
293	type_name = "lm80";
294	client_name = "LM80 chip";
295	} else {
296	#ifdef DEBUG
297	printk("lm80.o: Internal error: unknown kind (%d)?!?",
298	kind);
299	#endif
300	goto ERROR1;
301	}
302
303	/* Fill in the remaining client fields and put it into the global list */
304	strcpy(new_client->name, client_name);
305
306	new_client->id = lm80_id++;
307	data->valid = 0;
308	init_MUTEX(&data->update_lock);
309
310	/* Tell the I2C layer a new client has arrived */
311	if ((err = i2c_attach_client(new_client)))
312	goto ERROR3;
313
314	/* Register a new directory entry with module sensors */
315	if ((i = i2c_register_entry(new_client, type_name,
316	lm80_dir_table_template,
317	THIS_MODULE)) < 0) {
318	err = i;
319	goto ERROR4;
320	}
321	data->sysctl_id = i;
322
323	lm80_init_client(new_client);
324	return 0;
325
326	/* OK, this is not exactly good programming practice, usually. But it is
327	very code-efficient in this case. */
328	ERROR4:
329	i2c_detach_client(new_client);
330	ERROR3:
331	ERROR1:
332	kfree(data);
333	ERROR0:
334	return err;
335	}
336
337	static int lm80_detach_client(struct i2c_client *client)
338	{
339	int err;
340
341	i2c_deregister_entry(((struct lm80_data *) (client->data))->
342	sysctl_id);
343
344	if ((err = i2c_detach_client(client))) {
345	printk
346	("lm80.o: Client deregistration failed, client not detached.\n");
347	return err;
348	}
349
350	kfree(client->data);
351
352	return 0;
353	}
354
355	static int lm80_read_value(struct i2c_client *client, u8 reg)
356	{
357	return i2c_smbus_read_byte_data(client, reg);
358	}
359
360	static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
361	{
362	return i2c_smbus_write_byte_data(client, reg, value);
363	}
364
365	/* Called when we have found a new LM80. */
366	static void lm80_init_client(struct i2c_client *client)
367	{
368	/* Reset all except Watchdog values and last conversion values
369	This sets fan-divs to 2, among others. This makes most other
370	initializations unnecessary */
371	lm80_write_value(client, LM80_REG_CONFIG, 0x80);
372	/* Set 11-bit temperature resolution */
373	lm80_write_value(client, LM80_REG_RES, 0x08);
374
375	/* Start monitoring */
376	lm80_write_value(client, LM80_REG_CONFIG, 0x01);
377	}
378
379	static void lm80_update_client(struct i2c_client *client)
380	{
381	struct lm80_data *data = client->data;
382	int i;
383
384	down(&data->update_lock);
385
386	if ((jiffies - data->last_updated > 2 * HZ) \|\|
387	(jiffies < data->last_updated) \|\| !data->valid) {
388
389	#ifdef DEBUG
390	printk("Starting lm80 update\n");
391	#endif
392	for (i = 0; i <= 6; i++) {
393	data->in[i] =
394	lm80_read_value(client, LM80_REG_IN(i));
395	data->in_min[i] =
396	lm80_read_value(client, LM80_REG_IN_MIN(i));
397	data->in_max[i] =
398	lm80_read_value(client, LM80_REG_IN_MAX(i));
399	}
400	data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
401	data->fan_min[0] =
402	lm80_read_value(client, LM80_REG_FAN1_MIN);
403	data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
404	data->fan_min[1] =
405	lm80_read_value(client, LM80_REG_FAN2_MIN);
406
407	data->temp =
408	(lm80_read_value(client, LM80_REG_TEMP) << 8) \|
409	(lm80_read_value(client, LM80_REG_RES) & 0xf0);
410	data->temp_os_max =
411	lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
412	data->temp_os_hyst =
413	lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
414	data->temp_hot_max =
415	lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
416	data->temp_hot_hyst =
417	lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
418
419	i = lm80_read_value(client, LM80_REG_FANDIV);
420	data->fan_div[0] = (i >> 2) & 0x03;
421	data->fan_div[1] = (i >> 4) & 0x03;
422	data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
423	(lm80_read_value(client, LM80_REG_ALARM2) << 8);
424	data->last_updated = jiffies;
425	data->valid = 1;
426	}
427
428	up(&data->update_lock);
429	}
430
431
432	/* The next few functions are the call-back functions of the /proc/sys and
433	sysctl files. Which function is used is defined in the ctl_table in
434	the extra1 field.
435	Each function must return the magnitude (power of 10 to divide the date
436	with) if it is called with operation==SENSORS_PROC_REAL_INFO. It must
437	put a maximum of *nrels elements in results reflecting the data of this
438	file, and set *nrels to the number it actually put in it, if operation==
439	SENSORS_PROC_REAL_READ. Finally, it must get upto *nrels elements from
440	results and write them to the chip, if operations==SENSORS_PROC_REAL_WRITE.
441	Note that on SENSORS_PROC_REAL_READ, I do not check whether results is
442	large enough (by checking the incoming value of *nrels). This is not very
443	good practice, but as long as you put less than about 5 values in results,
444	you can assume it is large enough. */
445	void lm80_in(struct i2c_client *client, int operation, int ctl_name,
446	int nrels_mag, long results)
447	{
448	struct lm80_data *data = client->data;
449	int nr = ctl_name - LM80_SYSCTL_IN0;
450
451	if (operation == SENSORS_PROC_REAL_INFO)
452	*nrels_mag = 2;
453	else if (operation == SENSORS_PROC_REAL_READ) {
454	lm80_update_client(client);
455	results[0] = IN_FROM_REG(data->in_min[nr]);
456	results[1] = IN_FROM_REG(data->in_max[nr]);
457	results[2] = IN_FROM_REG(data->in[nr]);
458	*nrels_mag = 3;
459	} else if (operation == SENSORS_PROC_REAL_WRITE) {
460	if (*nrels_mag >= 1) {
461	data->in_min[nr] = IN_TO_REG(results[0]);
462	lm80_write_value(client, LM80_REG_IN_MIN(nr),
463	data->in_min[nr]);
464	}
465	if (*nrels_mag >= 2) {
466	data->in_max[nr] = IN_TO_REG(results[1]);
467	lm80_write_value(client, LM80_REG_IN_MAX(nr),
468	data->in_max[nr]);
469	}
470	}
471	}
472
473	void lm80_fan(struct i2c_client *client, int operation, int ctl_name,
474	int nrels_mag, long results)
475	{
476	struct lm80_data *data = client->data;
477	int nr = ctl_name - LM80_SYSCTL_FAN1 + 1;
478
479	if (operation == SENSORS_PROC_REAL_INFO)
480	*nrels_mag = 0;
481	else if (operation == SENSORS_PROC_REAL_READ) {
482	lm80_update_client(client);
483	results[0] = FAN_FROM_REG(data->fan_min[nr - 1],
484	DIV_FROM_REG(data->
485	fan_div[nr - 1]));
486	results[1] =
487	FAN_FROM_REG(data->fan[nr - 1],
488	DIV_FROM_REG(data->fan_div[nr - 1]));
489	*nrels_mag = 2;
490	} else if (operation == SENSORS_PROC_REAL_WRITE) {
491	if (*nrels_mag >= 1) {
492	data->fan_min[nr - 1] = FAN_TO_REG(results[0],
493	DIV_FROM_REG
494	(data->
495	fan_div[nr -
496	1]));
497	lm80_write_value(client,
498	nr ==
499	1 ? LM80_REG_FAN1_MIN :
500	LM80_REG_FAN2_MIN,
501	data->fan_min[nr - 1]);
502	}
503	}
504	}
505
506
507	void lm80_temp(struct i2c_client *client, int operation, int ctl_name,
508	int nrels_mag, long results)
509	{
510	struct lm80_data *data = client->data;
511	if (operation == SENSORS_PROC_REAL_INFO)
512	*nrels_mag = 2;
513	else if (operation == SENSORS_PROC_REAL_READ) {
514	lm80_update_client(client);
515	results[0] = TEMP_LIMIT_FROM_REG(data->temp_hot_max);
516	results[1] = TEMP_LIMIT_FROM_REG(data->temp_hot_hyst);
517	results[2] = TEMP_LIMIT_FROM_REG(data->temp_os_max);
518	results[3] = TEMP_LIMIT_FROM_REG(data->temp_os_hyst);
519	results[4] = TEMP_FROM_REG(data->temp);
520	*nrels_mag = 5;
521	} else if (operation == SENSORS_PROC_REAL_WRITE) {
522	if (*nrels_mag >= 1) {
523	data->temp_hot_max = TEMP_LIMIT_TO_REG(results[0]);
524	lm80_write_value(client, LM80_REG_TEMP_HOT_MAX,
525	data->temp_hot_max);
526	}
527	if (*nrels_mag >= 2) {
528	data->temp_hot_hyst =
529	TEMP_LIMIT_TO_REG(results[1]);
530	lm80_write_value(client, LM80_REG_TEMP_HOT_HYST,
531	data->temp_hot_hyst);
532	}
533	if (*nrels_mag >= 3) {
534	data->temp_os_max = TEMP_LIMIT_TO_REG(results[2]);
535	lm80_write_value(client, LM80_REG_TEMP_OS_MAX,
536	data->temp_os_max);
537	}
538	if (*nrels_mag >= 4) {
539	data->temp_os_hyst = TEMP_LIMIT_TO_REG(results[3]);
540	lm80_write_value(client, LM80_REG_TEMP_OS_HYST,
541	data->temp_os_hyst);
542	}
543	}
544	}
545
546	void lm80_alarms(struct i2c_client *client, int operation, int ctl_name,
547	int nrels_mag, long results)
548	{
549	struct lm80_data *data = client->data;
550	if (operation == SENSORS_PROC_REAL_INFO)
551	*nrels_mag = 0;
552	else if (operation == SENSORS_PROC_REAL_READ) {
553	lm80_update_client(client);
554	results[0] = ALARMS_FROM_REG(data->alarms);
555	*nrels_mag = 1;
556	}
557	}
558
559	void lm80_fan_div(struct i2c_client *client, int operation, int ctl_name,
560	int nrels_mag, long results)
561	{
562	struct lm80_data *data = client->data;
563	int old;
564
565	if (operation == SENSORS_PROC_REAL_INFO)
566	*nrels_mag = 0;
567	else if (operation == SENSORS_PROC_REAL_READ) {
568	lm80_update_client(client);
569	results[0] = DIV_FROM_REG(data->fan_div[0]);
570	results[1] = DIV_FROM_REG(data->fan_div[1]);
571	results[2] = 2;
572	*nrels_mag = 3;
573	} else if (operation == SENSORS_PROC_REAL_WRITE) {
574	old = lm80_read_value(client, LM80_REG_FANDIV);
575	if (*nrels_mag >= 2) {
576	data->fan_div[1] = DIV_TO_REG(results[1]);
577	old = (old & 0xcf) \| (data->fan_div[1] << 4);
578	}
579	if (*nrels_mag >= 1) {
580	data->fan_div[0] = DIV_TO_REG(results[0]);
581	old = (old & 0xf3) \| (data->fan_div[0] << 2);
582	lm80_write_value(client, LM80_REG_FANDIV, old);
583	}
584	}
585	}
586
587	static int __init sm_lm80_init(void)
588	{
589	printk("lm80.o version %s (%s)\n", LM_VERSION, LM_DATE);
590	return i2c_add_driver(&lm80_driver);
591	}
592
593	static void __exit sm_lm80_exit(void)
594	{
595	i2c_del_driver(&lm80_driver);
596	}
597
598
599
600	MODULE_AUTHOR
601	("Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock <phil@netroedge.com>");
602	MODULE_DESCRIPTION("LM80 driver");
603
604	module_init(sm_lm80_init);
605	module_exit(sm_lm80_exit);

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