drivers/watchdog/riowd.c

1 /* riowd.c - driver for hw watchdog inside Super I/O of RIO
13 #include <linux/watchdog.h>
22  * as its' watchdog.
24  * When the watchdog triggers, it asserts a line to the BBC (Boot Bus
30  * 0x05 (WDTO_INDEX) which is the watchdog time-out in minutes (1-255).
31  * If set to zero, this disables the watchdog.  When set, the system
32  * must periodically (before watchdog expires) clear (set to zero) and
33  * re-set the watchdog else it will trigger.
35  * There are two other indexed watchdog registers inside this Super I/O
37  * the watchdog control and can be used to make the watchdog timer re-set
39  * index 0x07 is merely a sampling of the line from the watchdog to the
42  * The watchdog device generates no interrupts.
46 MODULE_DESCRIPTION("Hardware watchdog driver for Sun RIO");
47 MODULE_SUPPORTED_DEVICE("watchdog");
64 MODULE_PARM_DESC(riowd_timeout, "Watchdog timeout in minutes");
171 	.name	= "watchdog",
200 		printk(KERN_ERR PFX "Cannot register watchdog misc device.\n");  in riowd_probe()
204 	printk(KERN_INFO PFX "Hardware watchdog [%i minutes], "  in riowd_probe()