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lm80.c @ 2781

Revision 2781, 18.3 KB (checked in by khali, 8 years ago)
Discard owner field from i2c_driver structure. I do not restore inc_use/dec_use because they are not actually used anywhere.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`

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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)) < 0) {
317	err = i;
318	goto ERROR4;
319	}
320	data->sysctl_id = i;
321
322	lm80_init_client(new_client);
323	return 0;
324
325	/* OK, this is not exactly good programming practice, usually. But it is
326	very code-efficient in this case. */
327	ERROR4:
328	i2c_detach_client(new_client);
329	ERROR3:
330	ERROR1:
331	kfree(data);
332	ERROR0:
333	return err;
334	}
335
336	static int lm80_detach_client(struct i2c_client *client)
337	{
338	int err;
339
340	i2c_deregister_entry(((struct lm80_data *) (client->data))->
341	sysctl_id);
342
343	if ((err = i2c_detach_client(client))) {
344	printk
345	("lm80.o: Client deregistration failed, client not detached.\n");
346	return err;
347	}
348
349	kfree(client->data);
350
351	return 0;
352	}
353
354	static int lm80_read_value(struct i2c_client *client, u8 reg)
355	{
356	return i2c_smbus_read_byte_data(client, reg);
357	}
358
359	static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
360	{
361	return i2c_smbus_write_byte_data(client, reg, value);
362	}
363
364	/* Called when we have found a new LM80. */
365	static void lm80_init_client(struct i2c_client *client)
366	{
367	/* Reset all except Watchdog values and last conversion values
368	This sets fan-divs to 2, among others. This makes most other
369	initializations unnecessary */
370	lm80_write_value(client, LM80_REG_CONFIG, 0x80);
371	/* Set 11-bit temperature resolution */
372	lm80_write_value(client, LM80_REG_RES, 0x08);
373
374	/* Start monitoring */
375	lm80_write_value(client, LM80_REG_CONFIG, 0x01);
376	}
377
378	static void lm80_update_client(struct i2c_client *client)
379	{
380	struct lm80_data *data = client->data;
381	int i;
382
383	down(&data->update_lock);
384
385	if ((jiffies - data->last_updated > 2 * HZ) \|\|
386	(jiffies < data->last_updated) \|\| !data->valid) {
387
388	#ifdef DEBUG
389	printk("Starting lm80 update\n");
390	#endif
391	for (i = 0; i <= 6; i++) {
392	data->in[i] =
393	lm80_read_value(client, LM80_REG_IN(i));
394	data->in_min[i] =
395	lm80_read_value(client, LM80_REG_IN_MIN(i));
396	data->in_max[i] =
397	lm80_read_value(client, LM80_REG_IN_MAX(i));
398	}
399	data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
400	data->fan_min[0] =
401	lm80_read_value(client, LM80_REG_FAN1_MIN);
402	data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
403	data->fan_min[1] =
404	lm80_read_value(client, LM80_REG_FAN2_MIN);
405
406	data->temp =
407	(lm80_read_value(client, LM80_REG_TEMP) << 8) \|
408	(lm80_read_value(client, LM80_REG_RES) & 0xf0);
409	data->temp_os_max =
410	lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
411	data->temp_os_hyst =
412	lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
413	data->temp_hot_max =
414	lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
415	data->temp_hot_hyst =
416	lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
417
418	i = lm80_read_value(client, LM80_REG_FANDIV);
419	data->fan_div[0] = (i >> 2) & 0x03;
420	data->fan_div[1] = (i >> 4) & 0x03;
421	data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
422	(lm80_read_value(client, LM80_REG_ALARM2) << 8);
423	data->last_updated = jiffies;
424	data->valid = 1;
425	}
426
427	up(&data->update_lock);
428	}
429
430
431	/* The next few functions are the call-back functions of the /proc/sys and
432	sysctl files. Which function is used is defined in the ctl_table in
433	the extra1 field.
434	Each function must return the magnitude (power of 10 to divide the date
435	with) if it is called with operation==SENSORS_PROC_REAL_INFO. It must
436	put a maximum of *nrels elements in results reflecting the data of this
437	file, and set *nrels to the number it actually put in it, if operation==
438	SENSORS_PROC_REAL_READ. Finally, it must get upto *nrels elements from
439	results and write them to the chip, if operations==SENSORS_PROC_REAL_WRITE.
440	Note that on SENSORS_PROC_REAL_READ, I do not check whether results is
441	large enough (by checking the incoming value of *nrels). This is not very
442	good practice, but as long as you put less than about 5 values in results,
443	you can assume it is large enough. */
444	void lm80_in(struct i2c_client *client, int operation, int ctl_name,
445	int nrels_mag, long results)
446	{
447	struct lm80_data *data = client->data;
448	int nr = ctl_name - LM80_SYSCTL_IN0;
449
450	if (operation == SENSORS_PROC_REAL_INFO)
451	*nrels_mag = 2;
452	else if (operation == SENSORS_PROC_REAL_READ) {
453	lm80_update_client(client);
454	results[0] = IN_FROM_REG(data->in_min[nr]);
455	results[1] = IN_FROM_REG(data->in_max[nr]);
456	results[2] = IN_FROM_REG(data->in[nr]);
457	*nrels_mag = 3;
458	} else if (operation == SENSORS_PROC_REAL_WRITE) {
459	if (*nrels_mag >= 1) {
460	data->in_min[nr] = IN_TO_REG(results[0]);
461	lm80_write_value(client, LM80_REG_IN_MIN(nr),
462	data->in_min[nr]);
463	}
464	if (*nrels_mag >= 2) {
465	data->in_max[nr] = IN_TO_REG(results[1]);
466	lm80_write_value(client, LM80_REG_IN_MAX(nr),
467	data->in_max[nr]);
468	}
469	}
470	}
471
472	void lm80_fan(struct i2c_client *client, int operation, int ctl_name,
473	int nrels_mag, long results)
474	{
475	struct lm80_data *data = client->data;
476	int nr = ctl_name - LM80_SYSCTL_FAN1 + 1;
477
478	if (operation == SENSORS_PROC_REAL_INFO)
479	*nrels_mag = 0;
480	else if (operation == SENSORS_PROC_REAL_READ) {
481	lm80_update_client(client);
482	results[0] = FAN_FROM_REG(data->fan_min[nr - 1],
483	DIV_FROM_REG(data->
484	fan_div[nr - 1]));
485	results[1] =
486	FAN_FROM_REG(data->fan[nr - 1],
487	DIV_FROM_REG(data->fan_div[nr - 1]));
488	*nrels_mag = 2;
489	} else if (operation == SENSORS_PROC_REAL_WRITE) {
490	if (*nrels_mag >= 1) {
491	data->fan_min[nr - 1] = FAN_TO_REG(results[0],
492	DIV_FROM_REG
493	(data->
494	fan_div[nr -
495	1]));
496	lm80_write_value(client,
497	nr ==
498	1 ? LM80_REG_FAN1_MIN :
499	LM80_REG_FAN2_MIN,
500	data->fan_min[nr - 1]);
501	}
502	}
503	}
504
505
506	void lm80_temp(struct i2c_client *client, int operation, int ctl_name,
507	int nrels_mag, long results)
508	{
509	struct lm80_data *data = client->data;
510	if (operation == SENSORS_PROC_REAL_INFO)
511	*nrels_mag = 2;
512	else if (operation == SENSORS_PROC_REAL_READ) {
513	lm80_update_client(client);
514	results[0] = TEMP_LIMIT_FROM_REG(data->temp_hot_max);
515	results[1] = TEMP_LIMIT_FROM_REG(data->temp_hot_hyst);
516	results[2] = TEMP_LIMIT_FROM_REG(data->temp_os_max);
517	results[3] = TEMP_LIMIT_FROM_REG(data->temp_os_hyst);
518	results[4] = TEMP_FROM_REG(data->temp);
519	*nrels_mag = 5;
520	} else if (operation == SENSORS_PROC_REAL_WRITE) {
521	if (*nrels_mag >= 1) {
522	data->temp_hot_max = TEMP_LIMIT_TO_REG(results[0]);
523	lm80_write_value(client, LM80_REG_TEMP_HOT_MAX,
524	data->temp_hot_max);
525	}
526	if (*nrels_mag >= 2) {
527	data->temp_hot_hyst =
528	TEMP_LIMIT_TO_REG(results[1]);
529	lm80_write_value(client, LM80_REG_TEMP_HOT_HYST,
530	data->temp_hot_hyst);
531	}
532	if (*nrels_mag >= 3) {
533	data->temp_os_max = TEMP_LIMIT_TO_REG(results[2]);
534	lm80_write_value(client, LM80_REG_TEMP_OS_MAX,
535	data->temp_os_max);
536	}
537	if (*nrels_mag >= 4) {
538	data->temp_os_hyst = TEMP_LIMIT_TO_REG(results[3]);
539	lm80_write_value(client, LM80_REG_TEMP_OS_HYST,
540	data->temp_os_hyst);
541	}
542	}
543	}
544
545	void lm80_alarms(struct i2c_client *client, int operation, int ctl_name,
546	int nrels_mag, long results)
547	{
548	struct lm80_data *data = client->data;
549	if (operation == SENSORS_PROC_REAL_INFO)
550	*nrels_mag = 0;
551	else if (operation == SENSORS_PROC_REAL_READ) {
552	lm80_update_client(client);
553	results[0] = ALARMS_FROM_REG(data->alarms);
554	*nrels_mag = 1;
555	}
556	}
557
558	void lm80_fan_div(struct i2c_client *client, int operation, int ctl_name,
559	int nrels_mag, long results)
560	{
561	struct lm80_data *data = client->data;
562	int old;
563
564	if (operation == SENSORS_PROC_REAL_INFO)
565	*nrels_mag = 0;
566	else if (operation == SENSORS_PROC_REAL_READ) {
567	lm80_update_client(client);
568	results[0] = DIV_FROM_REG(data->fan_div[0]);
569	results[1] = DIV_FROM_REG(data->fan_div[1]);
570	results[2] = 2;
571	*nrels_mag = 3;
572	} else if (operation == SENSORS_PROC_REAL_WRITE) {
573	old = lm80_read_value(client, LM80_REG_FANDIV);
574	if (*nrels_mag >= 2) {
575	data->fan_div[1] = DIV_TO_REG(results[1]);
576	old = (old & 0xcf) \| (data->fan_div[1] << 4);
577	}
578	if (*nrels_mag >= 1) {
579	data->fan_div[0] = DIV_TO_REG(results[0]);
580	old = (old & 0xf3) \| (data->fan_div[0] << 2);
581	lm80_write_value(client, LM80_REG_FANDIV, old);
582	}
583	}
584	}
585
586	static int __init sm_lm80_init(void)
587	{
588	printk("lm80.o version %s (%s)\n", LM_VERSION, LM_DATE);
589	return i2c_add_driver(&lm80_driver);
590	}
591
592	static void __exit sm_lm80_exit(void)
593	{
594	i2c_del_driver(&lm80_driver);
595	}
596
597
598
599	MODULE_AUTHOR
600	("Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock <phil@netroedge.com>");
601	MODULE_DESCRIPTION("LM80 driver");
602
603	module_init(sm_lm80_init);
604	module_exit(sm_lm80_exit);

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