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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Industrial Computer Source WDT500/501 driver
3 *
4 * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
5 * http://www.redhat.com
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 *
12 * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
13 * warranty for any of this software. This material is provided
14 * "AS-IS" and at no charge.
15 *
16 * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
17 *
18 * Release 0.10.
19 *
20 * Fixes
21 * Dave Gregorich : Modularisation and minor bugs
22 * Alan Cox : Added the watchdog ioctl() stuff
23 * Alan Cox : Fixed the reboot problem (as noted by
24 * Matt Crocker).
25 * Alan Cox : Added wdt= boot option
26 * Alan Cox : Cleaned up copy/user stuff
27 * Tim Hockin : Added insmod parameters, comment cleanup
28 * Parameterized timeout
29 * Tigran Aivazian : Restructured wdt_init() to handle failures
30 * Joel Becker : Added WDIOC_GET/SETTIMEOUT
31 * Matt Domsch : Added nowayout module option
32 */
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/interrupt.h>
35#include <linux/module.h>
36#include <linux/moduleparam.h>
37#include <linux/types.h>
38#include <linux/miscdevice.h>
39#include <linux/watchdog.h>
40#include <linux/fs.h>
41#include <linux/ioport.h>
42#include <linux/notifier.h>
43#include <linux/reboot.h>
44#include <linux/init.h>
45
46#include <asm/io.h>
47#include <asm/uaccess.h>
48#include <asm/system.h>
49#include "wd501p.h"
50
51static unsigned long wdt_is_open;
52static char expect_close;
53
54/*
55 * Module parameters
56 */
57
58#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
59
60static int heartbeat = WD_TIMO;
61static int wd_heartbeat;
62module_param(heartbeat, int, 0);
63MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
64
Andrey Panin4bfdf372005-07-27 11:43:58 -070065static int nowayout = WATCHDOG_NOWAYOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066module_param(nowayout, int, 0);
Wim Van Sebroeckbffda5c2007-01-27 20:54:24 +010067MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69/* You must set these - there is no sane way to probe for this board. */
70static int io=0x240;
71static int irq=11;
72
Alan Cox01c785d2008-01-09 21:36:01 -080073static DEFINE_SPINLOCK(wdt_lock);
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075module_param(io, int, 0);
76MODULE_PARM_DESC(io, "WDT io port (default=0x240)");
77module_param(irq, int, 0);
78MODULE_PARM_DESC(irq, "WDT irq (default=11)");
79
80#ifdef CONFIG_WDT_501
81/* Support for the Fan Tachometer on the WDT501-P */
82static int tachometer;
83
84module_param(tachometer, int, 0);
85MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, default=0)");
86#endif /* CONFIG_WDT_501 */
87
88/*
89 * Programming support
90 */
91
92static void wdt_ctr_mode(int ctr, int mode)
93{
94 ctr<<=6;
95 ctr|=0x30;
96 ctr|=(mode<<1);
97 outb_p(ctr, WDT_CR);
98}
99
100static void wdt_ctr_load(int ctr, int val)
101{
102 outb_p(val&0xFF, WDT_COUNT0+ctr);
103 outb_p(val>>8, WDT_COUNT0+ctr);
104}
105
106/**
107 * wdt_start:
108 *
109 * Start the watchdog driver.
110 */
111
112static int wdt_start(void)
113{
Alan Cox01c785d2008-01-09 21:36:01 -0800114 unsigned long flags;
115 spin_lock_irqsave(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 inb_p(WDT_DC); /* Disable watchdog */
117 wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
118 wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
119 wdt_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
120 wdt_ctr_load(0, 8948); /* Count at 100Hz */
121 wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
122 wdt_ctr_load(2,65535); /* Length of reset pulse */
123 outb_p(0, WDT_DC); /* Enable watchdog */
Alan Cox01c785d2008-01-09 21:36:01 -0800124 spin_unlock_irqrestore(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 return 0;
126}
127
128/**
129 * wdt_stop:
130 *
131 * Stop the watchdog driver.
132 */
133
134static int wdt_stop (void)
135{
Alan Cox01c785d2008-01-09 21:36:01 -0800136 unsigned long flags;
137 spin_lock_irqsave(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 /* Turn the card off */
139 inb_p(WDT_DC); /* Disable watchdog */
140 wdt_ctr_load(2,0); /* 0 length reset pulses now */
Alan Cox01c785d2008-01-09 21:36:01 -0800141 spin_unlock_irqrestore(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 return 0;
143}
144
145/**
146 * wdt_ping:
147 *
148 * Reload counter one with the watchdog heartbeat. We don't bother reloading
149 * the cascade counter.
150 */
151
152static int wdt_ping(void)
153{
Alan Cox01c785d2008-01-09 21:36:01 -0800154 unsigned long flags;
155 spin_lock_irqsave(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 /* Write a watchdog value */
157 inb_p(WDT_DC); /* Disable watchdog */
158 wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
159 wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
160 outb_p(0, WDT_DC); /* Enable watchdog */
Alan Cox01c785d2008-01-09 21:36:01 -0800161 spin_unlock_irqrestore(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 return 0;
163}
164
165/**
166 * wdt_set_heartbeat:
167 * @t: the new heartbeat value that needs to be set.
168 *
169 * Set a new heartbeat value for the watchdog device. If the heartbeat value is
170 * incorrect we keep the old value and return -EINVAL. If successfull we
171 * return 0.
172 */
173static int wdt_set_heartbeat(int t)
174{
175 if ((t < 1) || (t > 65535))
176 return -EINVAL;
177
178 heartbeat = t;
179 wd_heartbeat = t * 100;
180 return 0;
181}
182
183/**
184 * wdt_get_status:
185 * @status: the new status.
186 *
187 * Extract the status information from a WDT watchdog device. There are
188 * several board variants so we have to know which bits are valid. Some
189 * bits default to one and some to zero in order to be maximally painful.
190 *
191 * we then map the bits onto the status ioctl flags.
192 */
193
194static int wdt_get_status(int *status)
195{
Alan Cox01c785d2008-01-09 21:36:01 -0800196 unsigned char new_status;
197 unsigned long flags;
198
199 spin_lock_irqsave(&wdt_lock, flags);
200 new_status = inb_p(WDT_SR);
201 spin_unlock_irqrestore(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 *status=0;
204 if (new_status & WDC_SR_ISOI0)
205 *status |= WDIOF_EXTERN1;
206 if (new_status & WDC_SR_ISII1)
207 *status |= WDIOF_EXTERN2;
208#ifdef CONFIG_WDT_501
209 if (!(new_status & WDC_SR_TGOOD))
210 *status |= WDIOF_OVERHEAT;
211 if (!(new_status & WDC_SR_PSUOVER))
212 *status |= WDIOF_POWEROVER;
213 if (!(new_status & WDC_SR_PSUUNDR))
214 *status |= WDIOF_POWERUNDER;
215 if (tachometer) {
216 if (!(new_status & WDC_SR_FANGOOD))
217 *status |= WDIOF_FANFAULT;
218 }
219#endif /* CONFIG_WDT_501 */
220 return 0;
221}
222
223#ifdef CONFIG_WDT_501
224/**
225 * wdt_get_temperature:
226 *
227 * Reports the temperature in degrees Fahrenheit. The API is in
228 * farenheit. It was designed by an imperial measurement luddite.
229 */
230
231static int wdt_get_temperature(int *temperature)
232{
Alan Cox01c785d2008-01-09 21:36:01 -0800233 unsigned short c;
234 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Alan Cox01c785d2008-01-09 21:36:01 -0800236 spin_lock_irqsave(&wdt_lock, flags);
237 c = inb_p(WDT_RT);
238 spin_unlock_irqrestore(&wdt_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 *temperature = (c * 11 / 15) + 7;
240 return 0;
241}
242#endif /* CONFIG_WDT_501 */
243
244/**
245 * wdt_interrupt:
246 * @irq: Interrupt number
247 * @dev_id: Unused as we don't allow multiple devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 *
249 * Handle an interrupt from the board. These are raised when the status
250 * map changes in what the board considers an interesting way. That means
251 * a failure condition occurring.
252 */
253
David Howells7d12e782006-10-05 14:55:46 +0100254static irqreturn_t wdt_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
256 /*
257 * Read the status register see what is up and
258 * then printk it.
259 */
Alan Cox01c785d2008-01-09 21:36:01 -0800260 unsigned char status;
261
262 spin_lock(&wdt_lock);
263 status = inb_p(WDT_SR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265 printk(KERN_CRIT "WDT status %d\n", status);
266
267#ifdef CONFIG_WDT_501
268 if (!(status & WDC_SR_TGOOD))
269 printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT));
270 if (!(status & WDC_SR_PSUOVER))
271 printk(KERN_CRIT "PSU over voltage.\n");
272 if (!(status & WDC_SR_PSUUNDR))
273 printk(KERN_CRIT "PSU under voltage.\n");
274 if (tachometer) {
275 if (!(status & WDC_SR_FANGOOD))
276 printk(KERN_CRIT "Possible fan fault.\n");
277 }
278#endif /* CONFIG_WDT_501 */
Ilpo Jarvinen59338d42007-10-23 13:40:54 -0700279 if (!(status & WDC_SR_WCCR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280#ifdef SOFTWARE_REBOOT
281#ifdef ONLY_TESTING
282 printk(KERN_CRIT "Would Reboot.\n");
283#else
284 printk(KERN_CRIT "Initiating system reboot.\n");
Eric W. Biedermanf82567e2005-07-26 11:53:19 -0600285 emergency_restart();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286#endif
287#else
288 printk(KERN_CRIT "Reset in 5ms.\n");
289#endif
Ilpo Jarvinen59338d42007-10-23 13:40:54 -0700290 }
Alan Cox01c785d2008-01-09 21:36:01 -0800291 spin_unlock(&wdt_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 return IRQ_HANDLED;
293}
294
295
296/**
297 * wdt_write:
298 * @file: file handle to the watchdog
299 * @buf: buffer to write (unused as data does not matter here
300 * @count: count of bytes
301 * @ppos: pointer to the position to write. No seeks allowed
302 *
303 * A write to a watchdog device is defined as a keepalive signal. Any
304 * write of data will do, as we we don't define content meaning.
305 */
306
307static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
308{
309 if(count) {
310 if (!nowayout) {
311 size_t i;
312
313 /* In case it was set long ago */
314 expect_close = 0;
315
316 for (i = 0; i != count; i++) {
317 char c;
318 if (get_user(c, buf + i))
319 return -EFAULT;
320 if (c == 'V')
321 expect_close = 42;
322 }
323 }
324 wdt_ping();
325 }
326 return count;
327}
328
329/**
330 * wdt_ioctl:
331 * @inode: inode of the device
332 * @file: file handle to the device
333 * @cmd: watchdog command
334 * @arg: argument pointer
335 *
336 * The watchdog API defines a common set of functions for all watchdogs
337 * according to their available features. We only actually usefully support
338 * querying capabilities and current status.
339 */
340
341static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
342 unsigned long arg)
343{
344 void __user *argp = (void __user *)arg;
345 int __user *p = argp;
346 int new_heartbeat;
347 int status;
348
349 static struct watchdog_info ident = {
350 .options = WDIOF_SETTIMEOUT|
351 WDIOF_MAGICCLOSE|
352 WDIOF_KEEPALIVEPING,
353 .firmware_version = 1,
354 .identity = "WDT500/501",
355 };
356
357 /* Add options according to the card we have */
358 ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
359#ifdef CONFIG_WDT_501
360 ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
361 if (tachometer)
362 ident.options |= WDIOF_FANFAULT;
363#endif /* CONFIG_WDT_501 */
364
365 switch(cmd)
366 {
367 default:
Samuel Tardieu795b89d2006-09-09 17:34:31 +0200368 return -ENOTTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 case WDIOC_GETSUPPORT:
370 return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
371
372 case WDIOC_GETSTATUS:
373 wdt_get_status(&status);
374 return put_user(status, p);
375 case WDIOC_GETBOOTSTATUS:
376 return put_user(0, p);
377 case WDIOC_KEEPALIVE:
378 wdt_ping();
379 return 0;
380 case WDIOC_SETTIMEOUT:
381 if (get_user(new_heartbeat, p))
382 return -EFAULT;
383
384 if (wdt_set_heartbeat(new_heartbeat))
385 return -EINVAL;
386
387 wdt_ping();
388 /* Fall */
389 case WDIOC_GETTIMEOUT:
390 return put_user(heartbeat, p);
391 }
392}
393
394/**
395 * wdt_open:
396 * @inode: inode of device
397 * @file: file handle to device
398 *
399 * The watchdog device has been opened. The watchdog device is single
400 * open and on opening we load the counters. Counter zero is a 100Hz
401 * cascade, into counter 1 which downcounts to reboot. When the counter
402 * triggers counter 2 downcounts the length of the reset pulse which
403 * set set to be as long as possible.
404 */
405
406static int wdt_open(struct inode *inode, struct file *file)
407{
408 if(test_and_set_bit(0, &wdt_is_open))
409 return -EBUSY;
410 /*
411 * Activate
412 */
413 wdt_start();
414 return nonseekable_open(inode, file);
415}
416
417/**
418 * wdt_release:
419 * @inode: inode to board
420 * @file: file handle to board
421 *
422 * The watchdog has a configurable API. There is a religious dispute
423 * between people who want their watchdog to be able to shut down and
424 * those who want to be sure if the watchdog manager dies the machine
425 * reboots. In the former case we disable the counters, in the latter
426 * case you have to open it again very soon.
427 */
428
429static int wdt_release(struct inode *inode, struct file *file)
430{
431 if (expect_close == 42) {
432 wdt_stop();
433 clear_bit(0, &wdt_is_open);
434 } else {
435 printk(KERN_CRIT "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
436 wdt_ping();
437 }
438 expect_close = 0;
439 return 0;
440}
441
442#ifdef CONFIG_WDT_501
443/**
444 * wdt_temp_read:
445 * @file: file handle to the watchdog board
446 * @buf: buffer to write 1 byte into
447 * @count: length of buffer
448 * @ptr: offset (no seek allowed)
449 *
450 * Temp_read reports the temperature in degrees Fahrenheit. The API is in
451 * farenheit. It was designed by an imperial measurement luddite.
452 */
453
454static ssize_t wdt_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
455{
456 int temperature;
457
458 if (wdt_get_temperature(&temperature))
459 return -EFAULT;
460
461 if (copy_to_user (buf, &temperature, 1))
462 return -EFAULT;
463
464 return 1;
465}
466
467/**
468 * wdt_temp_open:
469 * @inode: inode of device
470 * @file: file handle to device
471 *
472 * The temperature device has been opened.
473 */
474
475static int wdt_temp_open(struct inode *inode, struct file *file)
476{
477 return nonseekable_open(inode, file);
478}
479
480/**
481 * wdt_temp_release:
482 * @inode: inode to board
483 * @file: file handle to board
484 *
485 * The temperature device has been closed.
486 */
487
488static int wdt_temp_release(struct inode *inode, struct file *file)
489{
490 return 0;
491}
492#endif /* CONFIG_WDT_501 */
493
494/**
495 * notify_sys:
496 * @this: our notifier block
497 * @code: the event being reported
498 * @unused: unused
499 *
500 * Our notifier is called on system shutdowns. We want to turn the card
501 * off at reboot otherwise the machine will reboot again during memory
502 * test or worse yet during the following fsck. This would suck, in fact
503 * trust me - if it happens it does suck.
504 */
505
506static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
507 void *unused)
508{
509 if(code==SYS_DOWN || code==SYS_HALT) {
510 /* Turn the card off */
511 wdt_stop();
512 }
513 return NOTIFY_DONE;
514}
515
516/*
517 * Kernel Interfaces
518 */
519
520
Arjan van de Ven62322d22006-07-03 00:24:21 -0700521static const struct file_operations wdt_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 .owner = THIS_MODULE,
523 .llseek = no_llseek,
524 .write = wdt_write,
525 .ioctl = wdt_ioctl,
526 .open = wdt_open,
527 .release = wdt_release,
528};
529
530static struct miscdevice wdt_miscdev = {
531 .minor = WATCHDOG_MINOR,
532 .name = "watchdog",
533 .fops = &wdt_fops,
534};
535
536#ifdef CONFIG_WDT_501
Arjan van de Ven62322d22006-07-03 00:24:21 -0700537static const struct file_operations wdt_temp_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 .owner = THIS_MODULE,
539 .llseek = no_llseek,
540 .read = wdt_temp_read,
541 .open = wdt_temp_open,
542 .release = wdt_temp_release,
543};
544
545static struct miscdevice temp_miscdev = {
546 .minor = TEMP_MINOR,
547 .name = "temperature",
548 .fops = &wdt_temp_fops,
549};
550#endif /* CONFIG_WDT_501 */
551
552/*
553 * The WDT card needs to learn about soft shutdowns in order to
554 * turn the timebomb registers off.
555 */
556
557static struct notifier_block wdt_notifier = {
558 .notifier_call = wdt_notify_sys,
559};
560
561/**
562 * cleanup_module:
563 *
564 * Unload the watchdog. You cannot do this with any file handles open.
565 * If your watchdog is set to continue ticking on close and you unload
566 * it, well it keeps ticking. We won't get the interrupt but the board
567 * will not touch PC memory so all is fine. You just have to load a new
568 * module in 60 seconds or reboot.
569 */
570
571static void __exit wdt_exit(void)
572{
573 misc_deregister(&wdt_miscdev);
574#ifdef CONFIG_WDT_501
575 misc_deregister(&temp_miscdev);
576#endif /* CONFIG_WDT_501 */
577 unregister_reboot_notifier(&wdt_notifier);
578 free_irq(irq, NULL);
579 release_region(io,8);
580}
581
582/**
583 * wdt_init:
584 *
585 * Set up the WDT watchdog board. All we have to do is grab the
586 * resources we require and bitch if anyone beat us to them.
587 * The open() function will actually kick the board off.
588 */
589
590static int __init wdt_init(void)
591{
592 int ret;
593
594 /* Check that the heartbeat value is within it's range ; if not reset to the default */
595 if (wdt_set_heartbeat(heartbeat)) {
596 wdt_set_heartbeat(WD_TIMO);
597 printk(KERN_INFO "wdt: heartbeat value must be 0<heartbeat<65536, using %d\n",
598 WD_TIMO);
599 }
600
601 if (!request_region(io, 8, "wdt501p")) {
602 printk(KERN_ERR "wdt: I/O address 0x%04x already in use\n", io);
603 ret = -EBUSY;
604 goto out;
605 }
606
Thomas Gleixner0f2ed4c2006-07-01 19:29:33 -0700607 ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 if(ret) {
609 printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
610 goto outreg;
611 }
612
613 ret = register_reboot_notifier(&wdt_notifier);
614 if(ret) {
615 printk(KERN_ERR "wdt: cannot register reboot notifier (err=%d)\n", ret);
616 goto outirq;
617 }
618
619#ifdef CONFIG_WDT_501
620 ret = misc_register(&temp_miscdev);
621 if (ret) {
622 printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
623 TEMP_MINOR, ret);
624 goto outrbt;
625 }
626#endif /* CONFIG_WDT_501 */
627
628 ret = misc_register(&wdt_miscdev);
629 if (ret) {
630 printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
631 WATCHDOG_MINOR, ret);
632 goto outmisc;
633 }
634
635 ret = 0;
636 printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n",
637 io, irq, heartbeat, nowayout);
638#ifdef CONFIG_WDT_501
639 printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
640#endif /* CONFIG_WDT_501 */
641
642out:
643 return ret;
644
645outmisc:
646#ifdef CONFIG_WDT_501
647 misc_deregister(&temp_miscdev);
648outrbt:
649#endif /* CONFIG_WDT_501 */
650 unregister_reboot_notifier(&wdt_notifier);
651outirq:
652 free_irq(irq, NULL);
653outreg:
654 release_region(io,8);
655 goto out;
656}
657
658module_init(wdt_init);
659module_exit(wdt_exit);
660
661MODULE_AUTHOR("Alan Cox");
662MODULE_DESCRIPTION("Driver for ISA ICS watchdog cards (WDT500/501)");
663MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
664MODULE_ALIAS_MISCDEV(TEMP_MINOR);
665MODULE_LICENSE("GPL");