Lines Matching +full:timer +full:- +full:watchdog

1 // SPDX-License-Identifier: GPL-2.0+
3  *	Acquire Single Board Computer Watchdog Timer driver
12  *	"AS-IS" and at no charge.
16  *	14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
18  *	    Can't add timeout - driver doesn't allow changing value
23  *		The Watch-Dog Timer is provided to ensure that standalone
28  *		reset (cold boot) or a non-maskable interrupt (NMI) to bring the
31  *		The Watch-Dog Timer is controlled by two I/O Ports.
32  *		  443 hex	- Read	- Enable or refresh the Watch-Dog Timer
33  *		  043 hex	- Read	- Disable the Watch-Dog Timer
35  *		To enable the Watch-Dog Timer, a read from I/O port 443h must
36  *		be performed. This will enable and activate the countdown timer
39  *		reset condition does not occur, the Watch-Dog Timer must be
41  *		The Watch-Dog Timer is disabled by reading I/O port 043h.
43  *		The Watch-Dog Timer Time-Out Period is set via jumpers.
57 #include <linux/errno.h>		/* For the -ENODEV/... values */
60 #include <linux/watchdog.h>		/* For the watchdog specific items */
62 #include <linux/ioport.h>		/* For io-port access */
71 /* There is no way to see what the correct time-out period is */
75 /* the watchdog platform device */
81 /* You must set this - there is no sane way to probe for this board. */
86 /* You must set this - there is no sane way to probe for this board. */
94 	"Watchdog cannot be stopped once started (default="
98  *	Watchdog Operations
103 	/* Write a watchdog value */  in acq_keepalive()
114  *	/dev/watchdog handling
120 	/* See if we got the magic character 'V' and reload the timer */  in acq_write()
132 					return -EFAULT;  in acq_write()
146 	int options, retval = -EINVAL;  in acq_ioctl()
157 		return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;  in acq_ioctl()
166 			return -EFAULT;  in acq_ioctl()
185 		return -ENOTTY;  in acq_ioctl()
192 		return -EBUSY;  in acq_open()
207 		pr_crit("Unexpected close, not stopping watchdog!\n");  in acq_close()
231 	.name	= "watchdog",
246 			ret = -EIO;  in acq_probe()
253 		ret = -EIO;  in acq_probe()
305 								-1, NULL, 0);  in acq_init()
323 	pr_info("Watchdog Module Unloaded\n");  in acq_exit()
330 MODULE_DESCRIPTION("Acquire Inc. Single Board Computer Watchdog Timer driver");