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adm1021.c @ 1685

Revision 1685, 20.2 KB (checked in by mds, 10 years ago)
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1	/*
2	adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
3	monitoring
4	Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
5	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/version.h>
23	#include <linux/module.h>
24	#include <linux/slab.h>
25	#include <linux/i2c.h>
26	#include "sensors.h"
27	#include "version.h"
28	#include <linux/init.h>
29
30	#ifdef MODULE_LICENSE
31	MODULE_LICENSE("GPL");
32	#endif
33
34	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,2,18)) \|\| \
35	(LINUX_VERSION_CODE == KERNEL_VERSION(2,3,0))
36	#define init_MUTEX(s) do { *(s) = MUTEX; } while(0)
37	#endif
38
39	#ifndef THIS_MODULE
40	#define THIS_MODULE NULL
41	#endif
42
43	/* Addresses to scan */
44	static unsigned short normal_i2c[] = { SENSORS_I2C_END };
45	static unsigned short normal_i2c_range[] = { 0x18, 0x1a, 0x29, 0x2b,
46	0x4c, 0x4e, SENSORS_I2C_END
47	};
48	static unsigned int normal_isa[] = { SENSORS_ISA_END };
49	static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
50
51	/* Insmod parameters */
52	SENSORS_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066);
53
54	/* adm1021 constants specified below */
55
56	/* The adm1021 registers */
57	/* Read-only */
58	#define ADM1021_REG_TEMP 0x00
59	#define ADM1021_REG_REMOTE_TEMP 0x01
60	#define ADM1021_REG_STATUS 0x02
61	#define ADM1021_REG_MAN_ID 0x0FE /* 0x41 = AMD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi*/
62	#define ADM1021_REG_DEV_ID 0x0FF /* ADM1021 = 0x0X, ADM1023 = 0x3X */
63	#define ADM1021_REG_DIE_CODE 0x0FF /* MAX1617A */
64	/* These use different addresses for reading/writing */
65	#define ADM1021_REG_CONFIG_R 0x03
66	#define ADM1021_REG_CONFIG_W 0x09
67	#define ADM1021_REG_CONV_RATE_R 0x04
68	#define ADM1021_REG_CONV_RATE_W 0x0A
69	/* These are for the ADM1023's additional precision on the remote temp sensor */
70	#define ADM1021_REG_REM_TEMP_PREC 0x010
71	#define ADM1021_REG_REM_OFFSET 0x011
72	#define ADM1021_REG_REM_OFFSET_PREC 0x012
73	#define ADM1021_REG_REM_TOS_PREC 0x013
74	#define ADM1021_REG_REM_THYST_PREC 0x014
75	/* limits */
76	#define ADM1021_REG_TOS_R 0x05
77	#define ADM1021_REG_TOS_W 0x0B
78	#define ADM1021_REG_REMOTE_TOS_R 0x07
79	#define ADM1021_REG_REMOTE_TOS_W 0x0D
80	#define ADM1021_REG_THYST_R 0x06
81	#define ADM1021_REG_THYST_W 0x0C
82	#define ADM1021_REG_REMOTE_THYST_R 0x08
83	#define ADM1021_REG_REMOTE_THYST_W 0x0E
84	/* write-only */
85	#define ADM1021_REG_ONESHOT 0x0F
86
87
88	/* Conversions. Rounding and limit checking is only done on the TO_REG
89	variants. Note that you should be a bit careful with which arguments
90	these macros are called: arguments may be evaluated more than once.
91	Fixing this is just not worth it. */
92	/* Conversions note: 1021 uses normal integer signed-byte format*/
93	#define TEMP_FROM_REG(val) (val > 127 ? val-256 : val)
94	#define TEMP_TO_REG(val) (SENSORS_LIMIT((val < 0 ? val+256 : val),0,255))
95
96	/* Initial values */
97
98	/* Note: Eventhough I left the low and high limits named os and hyst,
99	they don't quite work like a thermostat the way the LM75 does. I.e.,
100	a lower temp than THYST actuall triggers an alarm instead of
101	clearing it. Weird, ey? --Phil */
102	#define adm1021_INIT_TOS 60
103	#define adm1021_INIT_THYST 20
104	#define adm1021_INIT_REMOTE_TOS 60
105	#define adm1021_INIT_REMOTE_THYST 20
106
107	/* Each client has this additional data */
108	struct adm1021_data {
109	int sysctl_id;
110	enum chips type;
111
112	struct semaphore update_lock;
113	char valid; /* !=0 if following fields are valid */
114	unsigned long last_updated; /* In jiffies */
115
116	u8 temp, temp_os, temp_hyst; /* Register values */
117	u8 remote_temp, remote_temp_os, remote_temp_hyst, alarms, die_code;
118	/* Special values for ADM1023 only */
119	u8 remote_temp_prec, remote_temp_os_prec, remote_temp_hyst_prec,
120	remote_temp_offset, remote_temp_offset_prec;
121	};
122
123	#ifdef MODULE
124	extern int init_module(void);
125	extern int cleanup_module(void);
126	#endif /* MODULE */
127
128	#ifdef MODULE
129	static
130	#else
131	extern
132	#endif
133	int __init sensors_adm1021_init(void);
134	static int __init adm1021_cleanup(void);
135	static int adm1021_attach_adapter(struct i2c_adapter *adapter);
136	static int adm1021_detect(struct i2c_adapter *adapter, int address,
137	unsigned short flags, int kind);
138	static void adm1021_init_client(struct i2c_client *client);
139	static int adm1021_detach_client(struct i2c_client *client);
140	static int adm1021_command(struct i2c_client *client, unsigned int cmd,
141	void *arg);
142	static void adm1021_inc_use(struct i2c_client *client);
143	static void adm1021_dec_use(struct i2c_client *client);
144	static int adm1021_read_value(struct i2c_client *client, u8 reg);
145	static int adm1021_rd_good(u8 val, struct i2c_client client, u8 reg);
146	static int adm1021_write_value(struct i2c_client *client, u8 reg,
147	u16 value);
148	static void adm1021_temp(struct i2c_client *client, int operation,
149	int ctl_name, int nrels_mag, long results);
150	static void adm1021_remote_temp(struct i2c_client *client, int operation,
151	int ctl_name, int *nrels_mag,
152	long *results);
153	static void adm1021_alarms(struct i2c_client *client, int operation,
154	int ctl_name, int nrels_mag, long results);
155	static void adm1021_die_code(struct i2c_client *client, int operation,
156	int ctl_name, int nrels_mag, long results);
157	static void adm1021_update_client(struct i2c_client *client);
158
159	/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
160	static int read_only = 0;
161
162
163	/* This is the driver that will be inserted */
164	static struct i2c_driver adm1021_driver = {
165	/* name */ "ADM1021, MAX1617 sensor driver",
166	/* id */ I2C_DRIVERID_ADM1021,
167	/* flags */ I2C_DF_NOTIFY,
168	/* attach_adapter */ &adm1021_attach_adapter,
169	/* detach_client */ &adm1021_detach_client,
170	/* command */ &adm1021_command,
171	/* inc_use */ &adm1021_inc_use,
172	/* dec_use */ &adm1021_dec_use
173	};
174
175	/* These files are created for each detected adm1021. This is just a template;
176	though at first sight, you might think we could use a statically
177	allocated list, we need some way to get back to the parent - which
178	is done through one of the 'extra' fields which are initialized
179	when a new copy is allocated. */
180	static ctl_table adm1021_dir_table_template[] = {
181	{ADM1021_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real,
182	&i2c_sysctl_real, NULL, &adm1021_temp},
183	{ADM1021_SYSCTL_REMOTE_TEMP, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real,
184	&i2c_sysctl_real, NULL, &adm1021_remote_temp},
185	{ADM1021_SYSCTL_DIE_CODE, "die_code", NULL, 0, 0444, NULL, &i2c_proc_real,
186	&i2c_sysctl_real, NULL, &adm1021_die_code},
187	{ADM1021_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
188	&i2c_sysctl_real, NULL, &adm1021_alarms},
189	{0}
190	};
191
192	static ctl_table adm1021_max_dir_table_template[] = {
193	{ADM1021_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real,
194	&i2c_sysctl_real, NULL, &adm1021_temp},
195	{ADM1021_SYSCTL_REMOTE_TEMP, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real,
196	&i2c_sysctl_real, NULL, &adm1021_remote_temp},
197	{ADM1021_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
198	&i2c_sysctl_real, NULL, &adm1021_alarms},
199	{0}
200	};
201
202	/* Used by init/cleanup */
203	static int __initdata adm1021_initialized = 0;
204
205	/* I choose here for semi-static allocation. Complete dynamic
206	allocation could also be used; the code needed for this would probably
207	take more memory than the datastructure takes now. */
208	static int adm1021_id = 0;
209
210	int adm1021_attach_adapter(struct i2c_adapter *adapter)
211	{
212	return i2c_detect(adapter, &addr_data, adm1021_detect);
213	}
214
215	static int adm1021_detect(struct i2c_adapter *adapter, int address,
216	unsigned short flags, int kind)
217	{
218	int i;
219	struct i2c_client *new_client;
220	struct adm1021_data *data;
221	int err = 0;
222	const char *type_name = "";
223	const char *client_name = "";
224
225	/* Make sure we aren't probing the ISA bus!! This is just a safety check
226	at this moment; i2c_detect really won't call us. */
227	#ifdef DEBUG
228	if (i2c_is_isa_adapter(adapter)) {
229	printk
230	("adm1021.o: adm1021_detect called for an ISA bus adapter?!?\n");
231	return 0;
232	}
233	#endif
234
235	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
236	goto ERROR0;
237
238	/* OK. For now, we presume we have a valid client. We now create the
239	client structure, even though we cannot fill it completely yet.
240	But it allows us to access adm1021_{read,write}_value. */
241
242	if (!(new_client = kmalloc(sizeof(struct i2c_client) +
243	sizeof(struct adm1021_data),
244	GFP_KERNEL))) {
245	err = -ENOMEM;
246	goto ERROR0;
247	}
248
249	data = (struct adm1021_data *) (new_client + 1);
250	new_client->addr = address;
251	new_client->data = data;
252	new_client->adapter = adapter;
253	new_client->driver = &adm1021_driver;
254	new_client->flags = 0;
255
256	/* Now, we do the remaining detection. */
257
258	if (kind < 0) {
259	if (
260	(adm1021_read_value(new_client, ADM1021_REG_STATUS) &
261	0x03) != 0x00)
262	goto ERROR1;
263	}
264
265	/* Determine the chip type. */
266
267	if (kind <= 0) {
268	i = adm1021_read_value(new_client, ADM1021_REG_MAN_ID);
269	if (i == 0x41)
270	if ((adm1021_read_value (new_client, ADM1021_REG_DEV_ID) & 0x0F0) == 0x030)
271	kind = adm1023;
272	else
273	kind = adm1021;
274	else if (i == 0x49)
275	kind = thmc10;
276	else if (i == 0x23)
277	kind = gl523sm;
278	else if ((i == 0x4d) &&
279	(adm1021_read_value
280	(new_client, ADM1021_REG_DEV_ID) == 0x01))
281	kind = max1617a;
282	/* LM84 Mfr ID in a different place */
283	else
284	if (adm1021_read_value
285	(new_client, ADM1021_REG_CONV_RATE_R) == 0x00)
286	kind = lm84;
287	else if (i == 0x54)
288	kind = mc1066;
289	else
290	kind = max1617;
291	}
292
293	if (kind == max1617) {
294	type_name = "max1617";
295	client_name = "MAX1617 chip";
296	} else if (kind == max1617a) {
297	type_name = "max1617a";
298	client_name = "MAX1617A chip";
299	} else if (kind == adm1021) {
300	type_name = "adm1021";
301	client_name = "ADM1021 chip";
302	} else if (kind == adm1023) {
303	type_name = "adm1023";
304	client_name = "ADM1023 chip";
305	} else if (kind == thmc10) {
306	type_name = "thmc10";
307	client_name = "THMC10 chip";
308	} else if (kind == lm84) {
309	type_name = "lm84";
310	client_name = "LM84 chip";
311	} else if (kind == gl523sm) {
312	type_name = "gl523sm";
313	client_name = "GL523SM chip";
314	} else if (kind == mc1066) {
315	type_name = "mc1066";
316	client_name = "MC1066 chip";
317	} else {
318	#ifdef DEBUG
319	printk("adm1021.o: Internal error: unknown kind (%d)?!?",
320	kind);
321	#endif
322	goto ERROR1;
323	}
324
325	/* Fill in the remaining client fields and put it into the global list */
326	strcpy(new_client->name, client_name);
327	data->type = kind;
328
329	new_client->id = adm1021_id++;
330	data->valid = 0;
331	init_MUTEX(&data->update_lock);
332
333	/* Tell the I2C layer a new client has arrived */
334	if ((err = i2c_attach_client(new_client)))
335	goto ERROR3;
336
337	/* Register a new directory entry with module sensors */
338	if ((i = i2c_register_entry(new_client,
339	type_name,
340	data->type ==
341	adm1021 ?
342	adm1021_dir_table_template :
343	adm1021_max_dir_table_template,
344	THIS_MODULE)) < 0) {
345	err = i;
346	goto ERROR4;
347	}
348	data->sysctl_id = i;
349
350	/* Initialize the ADM1021 chip */
351	adm1021_init_client(new_client);
352	return 0;
353
354	/* OK, this is not exactly good programming practice, usually. But it is
355	very code-efficient in this case. */
356
357	ERROR4:
358	i2c_detach_client(new_client);
359	ERROR3:
360	ERROR1:
361	kfree(new_client);
362	ERROR0:
363	return err;
364	}
365
366	void adm1021_init_client(struct i2c_client *client)
367	{
368	/* Initialize the adm1021 chip */
369	adm1021_write_value(client, ADM1021_REG_TOS_W,
370	TEMP_TO_REG(adm1021_INIT_TOS));
371	adm1021_write_value(client, ADM1021_REG_THYST_W,
372	TEMP_TO_REG(adm1021_INIT_THYST));
373	adm1021_write_value(client, ADM1021_REG_REMOTE_TOS_W,
374	TEMP_TO_REG(adm1021_INIT_REMOTE_TOS));
375	adm1021_write_value(client, ADM1021_REG_REMOTE_THYST_W,
376	TEMP_TO_REG(adm1021_INIT_REMOTE_THYST));
377	/* Enable ADC and disable suspend mode */
378	adm1021_write_value(client, ADM1021_REG_CONFIG_W, 0);
379	/* Set Conversion rate to 1/sec (this can be tinkered with) */
380	adm1021_write_value(client, ADM1021_REG_CONV_RATE_W, 0x04);
381	}
382
383	int adm1021_detach_client(struct i2c_client *client)
384	{
385
386	int err;
387
388	i2c_deregister_entry(((struct adm1021_data *) (client->data))->
389	sysctl_id);
390
391	if ((err = i2c_detach_client(client))) {
392	printk
393	("adm1021.o: Client deregistration failed, client not detached.\n");
394	return err;
395	}
396
397	kfree(client);
398
399	return 0;
400
401	}
402
403
404	/* No commands defined yet */
405	int adm1021_command(struct i2c_client client, unsigned int cmd, void arg)
406	{
407	return 0;
408	}
409
410	void adm1021_inc_use(struct i2c_client *client)
411	{
412	#ifdef MODULE
413	MOD_INC_USE_COUNT;
414	#endif
415	}
416
417	void adm1021_dec_use(struct i2c_client *client)
418	{
419	#ifdef MODULE
420	MOD_DEC_USE_COUNT;
421	#endif
422	}
423
424	/* All registers are byte-sized */
425	int adm1021_read_value(struct i2c_client *client, u8 reg)
426	{
427	return i2c_smbus_read_byte_data(client, reg);
428	}
429
430	/* only update value if read succeeded */
431	int adm1021_rd_good(u8 val, struct i2c_client client, u8 reg)
432	{
433	int i;
434	i = i2c_smbus_read_byte_data(client, reg);
435	if(i < 0)
436	return i;
437	*val = i;
438	return 0;
439	}
440
441	int adm1021_write_value(struct i2c_client *client, u8 reg, u16 value)
442	{
443	if (read_only > 0)
444	return 0;
445
446	return i2c_smbus_write_byte_data(client, reg, value);
447	}
448
449	void adm1021_update_client(struct i2c_client *client)
450	{
451	struct adm1021_data *data = client->data;
452
453	down(&data->update_lock);
454
455	if ((jiffies - data->last_updated > HZ + HZ / 2) \|\|
456	(jiffies < data->last_updated) \|\| !data->valid) {
457
458	#ifdef DEBUG
459	printk("Starting adm1021 update\n");
460	#endif
461
462	adm1021_rd_good(&(data->temp), client, ADM1021_REG_TEMP);
463	adm1021_rd_good(&(data->temp_os), client, ADM1021_REG_TOS_R);
464	adm1021_rd_good(&(data->temp_hyst), client,
465	ADM1021_REG_THYST_R);
466	adm1021_rd_good(&(data->remote_temp), client,
467	ADM1021_REG_REMOTE_TEMP);
468	adm1021_rd_good(&(data->remote_temp_os), client,
469	ADM1021_REG_REMOTE_TOS_R);
470	adm1021_rd_good(&(data->remote_temp_hyst), client,
471	ADM1021_REG_REMOTE_THYST_R);
472	if(!adm1021_rd_good(&(data->alarms), client,
473	ADM1021_REG_STATUS))
474	data->alarms &= 0xec;
475	if (data->type == adm1021)
476	adm1021_rd_good(&(data->die_code), client,
477	ADM1021_REG_DIE_CODE);
478	if (data->type == adm1023) {
479	adm1021_rd_good(&(data->remote_temp_prec), client,
480	ADM1021_REG_REM_TEMP_PREC);
481	adm1021_rd_good(&(data->remote_temp_os_prec), client,
482	ADM1021_REG_REM_TOS_PREC);
483	adm1021_rd_good(&(data->remote_temp_hyst_prec), client,
484	ADM1021_REG_REM_THYST_PREC);
485	adm1021_rd_good(&(data->remote_temp_offset), client,
486	ADM1021_REG_REM_OFFSET);
487	adm1021_rd_good(&(data->remote_temp_offset_prec),
488	client, ADM1021_REG_REM_OFFSET_PREC);
489	}
490	data->last_updated = jiffies;
491	data->valid = 1;
492	}
493
494	up(&data->update_lock);
495	}
496
497
498	void adm1021_temp(struct i2c_client *client, int operation, int ctl_name,
499	int nrels_mag, long results)
500	{
501	struct adm1021_data *data = client->data;
502	if (operation == SENSORS_PROC_REAL_INFO)
503	*nrels_mag = 0;
504	else if (operation == SENSORS_PROC_REAL_READ) {
505	adm1021_update_client(client);
506	results[0] = TEMP_FROM_REG(data->temp_os);
507	results[1] = TEMP_FROM_REG(data->temp_hyst);
508	results[2] = TEMP_FROM_REG(data->temp);
509	*nrels_mag = 3;
510	} else if (operation == SENSORS_PROC_REAL_WRITE) {
511	if (*nrels_mag >= 1) {
512	data->temp_os = TEMP_TO_REG(results[0]);
513	adm1021_write_value(client, ADM1021_REG_TOS_W,
514	data->temp_os);
515	}
516	if (*nrels_mag >= 2) {
517	data->temp_hyst = TEMP_TO_REG(results[1]);
518	adm1021_write_value(client, ADM1021_REG_THYST_W,
519	data->temp_hyst);
520	}
521	}
522	}
523
524	void adm1021_remote_temp(struct i2c_client *client, int operation,
525	int ctl_name, int nrels_mag, long results)
526	{
527	int prec=0;
528	struct adm1021_data *data = client->data;
529	if (operation == SENSORS_PROC_REAL_INFO)
530	if (data->type == adm1023) { *nrels_mag = 3; }
531	else { *nrels_mag = 0; }
532	else if (operation == SENSORS_PROC_REAL_READ) {
533	adm1021_update_client(client);
534	results[0] = TEMP_FROM_REG(data->remote_temp_os);
535	results[1] = TEMP_FROM_REG(data->remote_temp_hyst);
536	results[2] = TEMP_FROM_REG(data->remote_temp);
537	if (data->type == adm1023) {
538	results[0]=results[0]*1000 +
539	((data->remote_temp_os_prec >> 5) * 125);
540	results[1]=results[1]*1000 +
541	((data->remote_temp_hyst_prec >> 5) * 125);
542	results[2]=(TEMP_FROM_REG(data->remote_temp_offset)*1000) +
543	((data->remote_temp_offset_prec >> 5) * 125);
544	results[3]=TEMP_FROM_REG(data->remote_temp)*1000 +
545	((data->remote_temp_prec >> 5) * 125);
546	*nrels_mag = 4;
547	} else {
548	*nrels_mag = 3;
549	}
550	} else if (operation == SENSORS_PROC_REAL_WRITE) {
551	if (*nrels_mag >= 1) {
552	if (data->type == adm1023) {
553	prec=((results[0]-((results[0]/1000)*1000))/125)<<5;
554	adm1021_write_value(client,
555	ADM1021_REG_REM_TOS_PREC,
556	prec);
557	results[0]=results[0]/1000;
558	data->remote_temp_os_prec=prec;
559	}
560	data->remote_temp_os = TEMP_TO_REG(results[0]);
561	adm1021_write_value(client,
562	ADM1021_REG_REMOTE_TOS_W,
563	data->remote_temp_os);
564	}
565	if (*nrels_mag >= 2) {
566	if (data->type == adm1023) {
567	prec=((results[1]-((results[1]/1000)*1000))/125)<<5;
568	adm1021_write_value(client,
569	ADM1021_REG_REM_THYST_PREC,
570	prec);
571	results[1]=results[1]/1000;
572	data->remote_temp_hyst_prec=prec;
573	}
574	data->remote_temp_hyst = TEMP_TO_REG(results[1]);
575	adm1021_write_value(client,
576	ADM1021_REG_REMOTE_THYST_W,
577	data->remote_temp_hyst);
578	}
579	if (*nrels_mag >= 3) {
580	if (data->type == adm1023) {
581	prec=((results[2]-((results[2]/1000)*1000))/125)<<5;
582	adm1021_write_value(client,
583	ADM1021_REG_REM_OFFSET_PREC,
584	prec);
585	results[2]=results[2]/1000;
586	data->remote_temp_offset_prec=prec;
587	data->remote_temp_offset=results[2];
588	adm1021_write_value(client,
589	ADM1021_REG_REM_OFFSET,
590	data->remote_temp_offset);
591	}
592	}
593	}
594	}
595
596	void adm1021_die_code(struct i2c_client *client, int operation,
597	int ctl_name, int nrels_mag, long results)
598	{
599	struct adm1021_data *data = client->data;
600	if (operation == SENSORS_PROC_REAL_INFO)
601	*nrels_mag = 0;
602	else if (operation == SENSORS_PROC_REAL_READ) {
603	adm1021_update_client(client);
604	results[0] = data->die_code;
605	*nrels_mag = 1;
606	} else if (operation == SENSORS_PROC_REAL_WRITE) {
607	/* Can't write to it */
608	}
609	}
610
611	void adm1021_alarms(struct i2c_client *client, int operation, int ctl_name,
612	int nrels_mag, long results)
613	{
614	struct adm1021_data *data = client->data;
615	if (operation == SENSORS_PROC_REAL_INFO)
616	*nrels_mag = 0;
617	else if (operation == SENSORS_PROC_REAL_READ) {
618	adm1021_update_client(client);
619	results[0] = data->alarms;
620	*nrels_mag = 1;
621	} else if (operation == SENSORS_PROC_REAL_WRITE) {
622	/* Can't write to it */
623	}
624	}
625
626	int __init sensors_adm1021_init(void)
627	{
628	int res;
629
630	printk("adm1021.o version %s (%s)\n", LM_VERSION, LM_DATE);
631	adm1021_initialized = 0;
632	if ((res = i2c_add_driver(&adm1021_driver))) {
633	printk
634	("adm1021.o: Driver registration failed, module not inserted.\n");
635	adm1021_cleanup();
636	return res;
637	}
638	adm1021_initialized++;
639	return 0;
640	}
641
642	int __init adm1021_cleanup(void)
643	{
644	int res;
645
646	if (adm1021_initialized >= 1) {
647	if ((res = i2c_del_driver(&adm1021_driver))) {
648	printk
649	("adm1021.o: Driver deregistration failed, module not removed.\n");
650	return res;
651	}
652	adm1021_initialized--;
653	}
654
655	return 0;
656	}
657
658	EXPORT_NO_SYMBOLS;
659
660	#ifdef MODULE
661
662	MODULE_AUTHOR
663	("Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock <phil@netroedge.com>");
664	MODULE_DESCRIPTION("adm1021 driver");
665
666	MODULE_PARM(read_only, "i");
667	MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
668
669	int init_module(void)
670	{
671	return sensors_adm1021_init();
672	}
673
674	int cleanup_module(void)
675	{
676	return adm1021_cleanup();
677	}
678
679	#endif /* MODULE */

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