1 // SPDX-License-Identifier: GPL-2.0+
5  *	(c) Copyright 2000-2001 Marek Michalkiewicz <[email protected]>
15  *	"AS-IS" and at no charge.
19  *	14-Dec-2001 Matt Domsch <[email protected]>
22  *	16-Oct-2002 Rob Radez <[email protected]>
44 #define WATCHDOG_TIMEOUT 60		/* 60 sec default timeout */
52  *	You must set these - there is no sane way to probe for this board.
54  *	To enable or restart, write the timeout value in seconds (1 to 63)
56  *	Both are 0x443 for most boards (tested on a PCA-6276VE-00B1), but
57  *	check your manual (at least the PCA-6159 seems to be different -
59  *	(0x43 is also a write-only control register for the 8254 timer!)
70 static int timeout = WATCHDOG_TIMEOUT;	/* in seconds */  variable
71 module_param(timeout, int, 0);
72 MODULE_PARM_DESC(timeout,
73 	"Watchdog timeout in seconds. 1<= timeout <=63, default="
89 	outb_p(timeout, wdt_start);  in advwdt_ping()
100 		return -EINVAL;  in advwdt_set_heartbeat()
101 	timeout = t;  in advwdt_set_heartbeat()
121 					return -EFAULT;  in advwdt_write()
147 			return -EFAULT;  in advwdt_ioctl()
156 		int options, retval = -EINVAL;  in advwdt_ioctl()
159 			return -EFAULT;  in advwdt_ioctl()
176 			return -EFAULT;  in advwdt_ioctl()
178 			return -EINVAL;  in advwdt_ioctl()
182 		return put_user(timeout, p);  in advwdt_ioctl()
184 		return -ENOTTY;  in advwdt_ioctl()
192 		return -EBUSY;  in advwdt_open()
245 			ret = -EIO;  in advwdt_probe()
252 		ret = -EIO;  in advwdt_probe()
258 	if (advwdt_set_heartbeat(timeout)) {  in advwdt_probe()
260 		pr_info("timeout value must be 1<=x<=63, using %d\n", timeout);  in advwdt_probe()
269 	pr_info("initialized. timeout=%d sec (nowayout=%d)\n",  in advwdt_probe()
270 		timeout, nowayout);  in advwdt_probe()
310 								-1, NULL, 0);  in advwdt_init()