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smsc47m1.c @ 4332

Revision 4332, 17.0 KB (checked in by khali, 6 years ago)
smsc47m1: Get rid of a useless semaphore (backport from Linux 2.6).
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`

Line
1	/*
2	smsc47m1.c - Part of lm_sensors, Linux kernel modules
3	for hardware monitoring
4
5	Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.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/ioport.h>
25	#include <linux/i2c.h>
26	#include <linux/i2c-proc.h>
27	#include <linux/init.h>
28	#include <asm/io.h>
29	#include "version.h"
30
31	static int force_addr = 0;
32	MODULE_PARM(force_addr, "i");
33	MODULE_PARM_DESC(force_addr,
34	"Initialize the base address of the sensors");
35
36	static unsigned short normal_i2c[] = { SENSORS_I2C_END };
37	static unsigned short normal_i2c_range[] = { SENSORS_I2C_END };
38	static unsigned int normal_isa[] = { 0x0000, SENSORS_ISA_END };
39	static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
40
41	SENSORS_INSMOD_2(smsc47m1, smsc47m2);
42	static u8 devid;
43
44	/* modified from kernel/include/traps.c */
45	#define REG 0x2e /* The register to read/write */
46	#define DEV 0x07 /* Register: Logical device select */
47	#define VAL 0x2f /* The value to read/write */
48	#define PME 0x0a /* The device with the fan registers in it */
49	#define DEVID 0x20 /* Register: Device ID */
50
51	static inline void
52	superio_outb(int reg, int val)
53	{
54	outb(reg, REG);
55	outb(val, VAL);
56	}
57
58	static inline int
59	superio_inb(int reg)
60	{
61	outb(reg, REG);
62	return inb(VAL);
63	}
64
65	static inline void
66	superio_select(void)
67	{
68	outb(DEV, REG);
69	outb(PME, VAL);
70	}
71
72	static inline void
73	superio_enter(void)
74	{
75	outb(0x55, REG);
76	}
77
78	static inline void
79	superio_exit(void)
80	{
81	outb(0xAA, REG);
82	}
83
84	/*
85	* SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
86	* (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
87	* The 47M15x and 47M192 chips "with hardware monitoring block"
88	* can do much more besides (device id 0x60).
89	* The LPC47M997 is undocumented, but seems to be compatible with
90	* the LPC47M192, and has the same device id.
91	* The LPC47M292 (device id 0x6B) is somewhat compatible, but it
92	* supports a 3rd fan, and the pin configuration registers are
93	* unfortunately different.
94	*/
95	#define SMSC_DEVID_MATCH(id) ((id) == 0x51 \|\| (id) == 0x59 \|\| \
96	(id) == 0x5F \|\| (id) == 0x60 \|\| \
97	(id) == 0x6B)
98
99	#define SMSC_ACT_REG 0x30
100	#define SMSC_BASE_REG 0x60
101
102	#define SMSC_EXTENT 0x80
103
104	#define SMSC47M1_REG_ALARM1 0x04
105	#define SMSC47M1_REG_TPIN2 0x33
106	#define SMSC47M1_REG_TPIN1 0x34
107	#define SMSC47M1_REG_PPIN(nr) (0x37 - (nr))
108	#define SMSC47M1_REG_FANDIV 0x58
109
110	static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
111	static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
112	static const u8 SMSC47M1_REG_FAN_MIN[3] = { 0x5b, 0x5c, 0x6c };
113
114	#define SMSC47M2_REG_ALARM6 0x09
115	#define SMSC47M2_REG_TPIN3 0x2d
116	#define SMSC47M2_REG_TPIN2 0x37
117	#define SMSC47M2_REG_TPIN1 0x38
118	#define SMSC47M2_REG_FANDIV3 0x6a
119
120	static inline u8 MIN_TO_REG(long rpm, int div)
121	{
122	if (rpm == 0)
123	return 0;
124	rpm = SENSORS_LIMIT(rpm, 1, 1000000);
125	return SENSORS_LIMIT(192 - ((983040 + rpm * div / 2) / (rpm * div)),
126	0, 191);
127	}
128
129	#define MIN_FROM_REG(val,div) ((val)>=192?0: \
130	983040/((192-(val))*(div)))
131	#define FAN_FROM_REG(val,div,preload) ((val)==0?-1:(val)==255?0: \
132	983040/(((val)-preload)*(div)))
133	#define DIV_FROM_REG(val) (1 << (val))
134	#define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1)
135	/* reg is 6 middle bits; /proc is 8 bits */
136	#define PWM_FROM_REG(val) (((val) << 1) & 0xfc)
137	#define PWM_TO_REG(val) (((SENSORS_LIMIT((val), 0, 255)) >> 1) & 0x7e)
138
139	struct smsc47m1_data {
140	struct i2c_client client;
141	int sysctl_id;
142	enum chips type;
143
144	struct semaphore update_lock;
145	char valid; /* !=0 if following fields are valid */
146	unsigned long last_updated; /* In jiffies */
147
148	u8 fan[3]; /* Register value */
149	u8 fan_min[3]; /* Register value */
150	u8 fan_div[3]; /* Register encoding, shifted right */
151	u8 alarms; /* Register encoding */
152	u8 pwm[3]; /* Register value (bit 0 is disable) */
153	};
154
155
156	static int smsc47m1_attach_adapter(struct i2c_adapter *adapter);
157	static int smsc47m1_detect(struct i2c_adapter *adapter, int address,
158	unsigned short flags, int kind);
159	static int smsc47m1_detach_client(struct i2c_client *client);
160	static void smsc47m1_update_client(struct i2c_client *client);
161	static void smsc47m1_init_client(struct i2c_client *client);
162
163
164	static void smsc47m1_fan(struct i2c_client *client, int operation,
165	int ctl_name, int nrels_mag, long results);
166	static void smsc47m1_alarms(struct i2c_client *client, int operation,
167	int ctl_name, int nrels_mag, long results);
168	static void smsc47m1_fan_div(struct i2c_client *client, int operation,
169	int ctl_name, int nrels_mag, long results);
170	static void smsc47m1_pwm(struct i2c_client *client, int operation,
171	int ctl_name, int nrels_mag, long results);
172
173	static struct i2c_driver smsc47m1_driver = {
174	.name = "SMSC 47M1xx fan monitor",
175	.id = I2C_DRIVERID_SMSC47M1,
176	.flags = I2C_DF_NOTIFY,
177	.attach_adapter = smsc47m1_attach_adapter,
178	.detach_client = smsc47m1_detach_client,
179	};
180
181	/* -- SENSORS SYSCTL START -- */
182	#define SMSC47M1_SYSCTL_FAN1 1101 /* Rotations/min */
183	#define SMSC47M1_SYSCTL_FAN2 1102
184	#define SMSC47M1_SYSCTL_FAN3 1103
185	#define SMSC47M1_SYSCTL_PWM1 1401
186	#define SMSC47M1_SYSCTL_PWM2 1402
187	#define SMSC47M1_SYSCTL_PWM3 1403
188	#define SMSC47M1_SYSCTL_FAN_DIV 2000 /* 1, 2, 4 or 8 */
189	#define SMSC47M1_SYSCTL_ALARMS 2004 /* bitvector */
190
191	#define SMSC47M1_ALARM_FAN1 0x0001
192	#define SMSC47M1_ALARM_FAN2 0x0002
193	#define SMSC47M1_ALARM_FAN3 0x0004
194
195	/* -- SENSORS SYSCTL END -- */
196
197	static ctl_table smsc47m1_dir_table_template[] = {
198	{SMSC47M1_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &i2c_proc_real,
199	&i2c_sysctl_real, NULL, &smsc47m1_fan},
200	{SMSC47M1_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &i2c_proc_real,
201	&i2c_sysctl_real, NULL, &smsc47m1_fan},
202	{SMSC47M1_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL, &i2c_proc_real,
203	&i2c_sysctl_real, NULL, &smsc47m1_fan_div},
204	{SMSC47M1_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
205	&i2c_sysctl_real, NULL, &smsc47m1_alarms},
206	{SMSC47M1_SYSCTL_PWM1, "pwm1", NULL, 0, 0644, NULL, &i2c_proc_real,
207	&i2c_sysctl_real, NULL, &smsc47m1_pwm},
208	{SMSC47M1_SYSCTL_PWM2, "pwm2", NULL, 0, 0644, NULL, &i2c_proc_real,
209	&i2c_sysctl_real, NULL, &smsc47m1_pwm},
210	{0}
211	};
212
213	static ctl_table smsc47m2_dir_table_template[] = {
214	{SMSC47M1_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &i2c_proc_real,
215	&i2c_sysctl_real, NULL, &smsc47m1_fan},
216	{SMSC47M1_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &i2c_proc_real,
217	&i2c_sysctl_real, NULL, &smsc47m1_fan},
218	{SMSC47M1_SYSCTL_FAN3, "fan3", NULL, 0, 0644, NULL, &i2c_proc_real,
219	&i2c_sysctl_real, NULL, &smsc47m1_fan},
220	{SMSC47M1_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL, &i2c_proc_real,
221	&i2c_sysctl_real, NULL, &smsc47m1_fan_div},
222	{SMSC47M1_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
223	&i2c_sysctl_real, NULL, &smsc47m1_alarms},
224	{SMSC47M1_SYSCTL_PWM1, "pwm1", NULL, 0, 0644, NULL, &i2c_proc_real,
225	&i2c_sysctl_real, NULL, &smsc47m1_pwm},
226	{SMSC47M1_SYSCTL_PWM2, "pwm2", NULL, 0, 0644, NULL, &i2c_proc_real,
227	&i2c_sysctl_real, NULL, &smsc47m1_pwm},
228	{SMSC47M1_SYSCTL_PWM3, "pwm3", NULL, 0, 0644, NULL, &i2c_proc_real,
229	&i2c_sysctl_real, NULL, &smsc47m1_pwm},
230	{0}
231	};
232
233	static int smsc47m1_attach_adapter(struct i2c_adapter *adapter)
234	{
235	return i2c_detect(adapter, &addr_data, smsc47m1_detect);
236	}
237
238	static int __init smsc47m1_find(int *address)
239	{
240	u16 val;
241
242	superio_enter();
243	devid = superio_inb(DEVID);
244	if (!SMSC_DEVID_MATCH(devid)) {
245	superio_exit();
246	return -ENODEV;
247	}
248
249	superio_select();
250	val = (superio_inb(SMSC_BASE_REG) << 8) \|
251	superio_inb(SMSC_BASE_REG + 1);
252	*address = val & ~(SMSC_EXTENT - 1);
253	if (*address == 0 && force_addr == 0) {
254	printk("smsc47m1.o: base address not set - use force_addr=0xaddr\n");
255	superio_exit();
256	return -ENODEV;
257	}
258	if (force_addr)
259	address = force_addr; / so detect will get called */
260
261	superio_exit();
262	return 0;
263	}
264
265	int smsc47m1_detect(struct i2c_adapter *adapter, int address,
266	unsigned short flags, int kind)
267	{
268	int i;
269	struct i2c_client *new_client;
270	struct smsc47m1_data *data;
271	int err = 0;
272	const char *type_name;
273	const char *client_name;
274
275	if (!i2c_is_isa_adapter(adapter)) {
276	return 0;
277	}
278
279	if(force_addr)
280	address = force_addr & ~(SMSC_EXTENT - 1);
281	if (check_region(address, SMSC_EXTENT)) {
282	printk("smsc47m1.o: region 0x%x already in use!\n", address);
283	return -ENODEV;
284	}
285	if(force_addr) {
286	printk("smsc47m1.o: forcing ISA address 0x%04X\n", address);
287	superio_enter();
288	superio_select();
289	superio_outb(SMSC_BASE_REG, address >> 8);
290	superio_outb(SMSC_BASE_REG+1, address & 0xff);
291	superio_exit();
292	}
293
294	if (!(data = kmalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) {
295	return -ENOMEM;
296	}
297
298	switch (devid) {
299	case 0x51:
300	kind = smsc47m1;
301	type_name = "smsc47m1";
302	client_name = "LPC47B27x chip";
303	break;
304	case 0x5F:
305	kind = smsc47m1;
306	type_name = "smsc47m1";
307	client_name = "LPC47M14x chip";
308	break;
309	case 0x60:
310	kind = smsc47m1;
311	type_name = "smsc47m1";
312	client_name = "LPC47M192 chip";
313	break;
314	case 0x6B:
315	kind = smsc47m2;
316	type_name = "smsc47m2";
317	client_name = "LPC47M292 chip";
318	break;
319	default:
320	kind = smsc47m1;
321	type_name = "smsc47m1";
322	client_name = "LPC47M1xx chip";
323	}
324
325	new_client = &data->client;
326	new_client->addr = address;
327	new_client->data = data;
328	new_client->adapter = adapter;
329	new_client->driver = &smsc47m1_driver;
330	new_client->flags = 0;
331
332	request_region(address, SMSC_EXTENT, "smsc47m1-fans");
333	strcpy(new_client->name, client_name);
334	data->type = kind;
335	data->valid = 0;
336	init_MUTEX(&data->update_lock);
337
338	if ((err = i2c_attach_client(new_client)))
339	goto ERROR3;
340
341	if ((i = i2c_register_entry((struct i2c_client *) new_client,
342	type_name,
343	kind == smsc47m2 ?
344	smsc47m2_dir_table_template :
345	smsc47m1_dir_table_template,
346	THIS_MODULE)) < 0) {
347	err = i;
348	goto ERROR4;
349	}
350	data->sysctl_id = i;
351
352	smsc47m1_init_client(new_client);
353	return 0;
354
355	ERROR4:
356	i2c_detach_client(new_client);
357	ERROR3:
358	release_region(address, SMSC_EXTENT);
359	kfree(data);
360	return err;
361	}
362
363	static int smsc47m1_detach_client(struct i2c_client *client)
364	{
365	int err;
366
367	i2c_deregister_entry(((struct smsc47m1_data *) (client->data))->
368	sysctl_id);
369
370	if ((err = i2c_detach_client(client))) {
371	printk
372	("smsc47m1.o: Client deregistration failed, client not detached.\n");
373	return err;
374	}
375
376	release_region(client->addr, SMSC_EXTENT);
377	kfree(client->data);
378
379	return 0;
380	}
381
382	static inline int smsc47m1_read_value(struct i2c_client *client, u8 reg)
383	{
384	return inb_p(client->addr + reg);
385	}
386
387	static inline void smsc47m1_write_value(struct i2c_client *client, u8 reg,
388	u8 value)
389	{
390	outb_p(value, client->addr + reg);
391	}
392
393	static void smsc47m1_init_client(struct i2c_client *client)
394	{
395	struct smsc47m1_data *data = client->data;
396	u8 reg;
397
398	switch (data->type) {
399	case smsc47m2:
400	/* For the new LPC47M292 chip, I prefer to play it safe and
401	only report the pin configuration */
402	reg = smsc47m1_read_value(client, SMSC47M2_REG_TPIN1);
403	if ((reg & 0x0d) != 0x09)
404	printk(KERN_NOTICE "smsc47m1: GP35 not configured for "
405	"fan input, ignore fan1 values\n");
406	reg = smsc47m1_read_value(client, SMSC47M2_REG_TPIN2);
407	if ((reg & 0x0d) != 0x09)
408	printk(KERN_NOTICE "smsc47m1: GP34 not configured for "
409	"fan input, ignore fan2 values\n");
410	reg = smsc47m1_read_value(client, SMSC47M2_REG_TPIN3);
411	if ((reg & 0x0d) != 0x0d)
412	printk(KERN_NOTICE "smsc47m1: GP33 not configured for "
413	"fan input, ignore fan3 values\n");
414	break;
415	default:
416	/* configure pins for tach function */
417	smsc47m1_write_value(client, SMSC47M1_REG_TPIN1, 0x05);
418	smsc47m1_write_value(client, SMSC47M1_REG_TPIN2, 0x05);
419	}
420	}
421
422	static void smsc47m1_update_client(struct i2c_client *client)
423	{
424	struct smsc47m1_data *data = client->data;
425
426	down(&data->update_lock);
427
428	if ((jiffies - data->last_updated > HZ + HZ / 2) \|\|
429	(jiffies < data->last_updated) \|\| !data->valid) {
430	int i, fan_nr;
431	fan_nr = data->type == smsc47m2 ? 3 : 2;
432
433	for (i = 0; i < fan_nr; i++) {
434	data->fan[i] =
435	smsc47m1_read_value(client, SMSC47M1_REG_FAN[i]);
436	data->fan_min[i] =
437	smsc47m1_read_value(client, SMSC47M1_REG_FAN_MIN[i]);
438	data->pwm[i] =
439	smsc47m1_read_value(client, SMSC47M1_REG_PWM[i]);
440	}
441
442	i = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV);
443	data->fan_div[0] = (i >> 4) & 0x03;
444	data->fan_div[1] = i >> 6;
445	data->alarms =
446	smsc47m1_read_value(client, SMSC47M1_REG_ALARM1) >> 6;
447	if(data->alarms)
448	smsc47m1_write_value(client, SMSC47M1_REG_ALARM1, 0xc0);
449
450	if (fan_nr >= 3) {
451	data->fan_div[2] = (smsc47m1_read_value(client,
452	SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
453	data->alarms \|= (smsc47m1_read_value(client,
454	SMSC47M2_REG_ALARM6) & 0x40) >> 4;
455	if (data->alarms & 0x04)
456	smsc47m1_write_value(client,
457	SMSC47M2_REG_ALARM6,
458	0x40);
459	}
460
461	data->last_updated = jiffies;
462	data->valid = 1;
463	}
464
465	up(&data->update_lock);
466	}
467
468
469	void smsc47m1_fan(struct i2c_client *client, int operation, int ctl_name,
470	int nrels_mag, long results)
471	{
472	struct smsc47m1_data *data = client->data;
473	int nr = ctl_name - SMSC47M1_SYSCTL_FAN1;
474
475	if (operation == SENSORS_PROC_REAL_INFO)
476	*nrels_mag = 0;
477	else if (operation == SENSORS_PROC_REAL_READ) {
478	smsc47m1_update_client(client);
479	results[0] = MIN_FROM_REG(data->fan_min[nr],
480	DIV_FROM_REG(data->fan_div[nr]));
481	results[1] = FAN_FROM_REG(data->fan[nr],
482	DIV_FROM_REG(data->fan_div[nr]),
483	data->fan_min[nr]);
484	*nrels_mag = 2;
485	} else if (operation == SENSORS_PROC_REAL_WRITE) {
486	if (*nrels_mag >= 1) {
487	data->fan_min[nr] = MIN_TO_REG(results[0],
488	DIV_FROM_REG(data->fan_div[nr]));
489	smsc47m1_write_value(client, SMSC47M1_REG_FAN_MIN[nr],
490	data->fan_min[nr]);
491	}
492	}
493	}
494
495
496	void smsc47m1_alarms(struct i2c_client *client, int operation, int ctl_name,
497	int nrels_mag, long results)
498	{
499	struct smsc47m1_data *data = client->data;
500	if (operation == SENSORS_PROC_REAL_INFO)
501	*nrels_mag = 0;
502	else if (operation == SENSORS_PROC_REAL_READ) {
503	smsc47m1_update_client(client);
504	results[0] = data->alarms;
505	*nrels_mag = 1;
506	}
507	}
508
509	void smsc47m1_fan_div(struct i2c_client *client, int operation,
510	int ctl_name, int nrels_mag, long results)
511	{
512	struct smsc47m1_data *data = client->data;
513	int old;
514
515	if (operation == SENSORS_PROC_REAL_INFO)
516	*nrels_mag = 0;
517	else if (operation == SENSORS_PROC_REAL_READ) {
518	smsc47m1_update_client(client);
519	results[0] = DIV_FROM_REG(data->fan_div[0]);
520	results[1] = DIV_FROM_REG(data->fan_div[1]);
521	*nrels_mag = 2;
522	} else if (operation == SENSORS_PROC_REAL_WRITE) {
523	old = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV);
524	if (*nrels_mag >= 3 && data->type == smsc47m2) {
525	data->fan_div[2] = DIV_TO_REG(results[2]);
526	smsc47m1_write_value(client, SMSC47M2_REG_FANDIV3,
527	(smsc47m1_read_value(client,
528	SMSC47M2_REG_FANDIV3) & 0xcf)
529	\| (data->fan_div[2] << 4));
530	}
531	if (*nrels_mag >= 2) {
532	data->fan_div[1] = DIV_TO_REG(results[1]);
533	old = (old & 0x3f) \| (data->fan_div[1] << 6);
534	}
535	if (*nrels_mag >= 1) {
536	data->fan_div[0] = DIV_TO_REG(results[0]);
537	old = (old & 0xcf) \| (data->fan_div[0] << 4);
538	smsc47m1_write_value(client, SMSC47M1_REG_FANDIV, old);
539	}
540	}
541	}
542
543	void smsc47m1_pwm(struct i2c_client *client, int operation, int ctl_name,
544	int nrels_mag, long results)
545	{
546	struct smsc47m1_data *data = client->data;
547	int nr = ctl_name - SMSC47M1_SYSCTL_PWM1;
548
549	if (operation == SENSORS_PROC_REAL_INFO)
550	*nrels_mag = 0;
551	else if (operation == SENSORS_PROC_REAL_READ) {
552	smsc47m1_update_client(client);
553	results[0] = PWM_FROM_REG(data->pwm[nr]);
554	results[1] = !(data->pwm[nr] & 0x01);
555	*nrels_mag = 2;
556	} else if (operation == SENSORS_PROC_REAL_WRITE) {
557	if (*nrels_mag >= 1) {
558	data->pwm[nr] = smsc47m1_read_value(client,
559	SMSC47M1_REG_PWM[nr]) & 0x81;
560	data->pwm[nr] \|= PWM_TO_REG(results[0]);
561	if (*nrels_mag >= 2) {
562	if (results[1]) {
563	/* enable PWM */
564	data->pwm[nr] &= 0xfe;
565	} else {
566	/* disable PWM */
567	data->pwm[nr] \|= 0x01;
568	}
569	}
570	smsc47m1_write_value(client, SMSC47M1_REG_PWM[nr],
571	data->pwm[nr]);
572	}
573	}
574	}
575
576	static int __init sm_smsc47m1_init(void)
577	{
578	int addr;
579
580	printk("smsc47m1.o version %s (%s)\n", LM_VERSION, LM_DATE);
581
582	if (smsc47m1_find(&addr)) {
583	printk("smsc47m1.o: SMSC 47M1xx not detected, module not inserted.\n");
584	return -ENODEV;
585	}
586	normal_isa[0] = addr;
587
588	return i2c_add_driver(&smsc47m1_driver);
589	}
590
591	static void __exit sm_smsc47m1_exit(void)
592	{
593	i2c_del_driver(&smsc47m1_driver);
594	}
595
596
597
598	MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
599	MODULE_DESCRIPTION("SMSC 47M1xx Fan sensors");
600	MODULE_LICENSE("GPL");
601
602	module_init(sm_smsc47m1_init);
603	module_exit(sm_smsc47m1_exit);

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