6  * Watchdog driver for the ST-Ericsson AB COH 901 327 IP core
13 #include <linux/watchdog.h>
82  * The watchdog block is of course always clocked, the
114 	/* Enable the watchdog interrupt */  in coh901327_enable()
116 	/* Activate the watchdog timer */  in coh901327_enable()
118 	/* Start the watchdog timer */  in coh901327_enable()
121 	 * Extra read so that this change propagate in the watchdog.  in coh901327_enable()
128 			"%s(): watchdog not enabled! D2R value %04x\n",  in coh901327_enable()
137 	/* Disable the watchdog interrupt if it is active */  in coh901327_disable()
139 	/* If the watchdog is currently enabled, attempt to disable it */  in coh901327_disable()
154 			"%s(): watchdog not disabled! D2R value %04x\n",  in coh901327_disable()
166 	/* Feed the watchdog */  in coh901327_keepalive()
194  * This interrupt occurs 10 ms before the watchdog WILL bark.
204 	 * when the system is about to watchdog-reset, add them here!  in coh901327_interrupt()
207 	 * to prevent a watchdog reset by feeding the watchdog at this  in coh901327_interrupt()
217 	dev_crit(parent, "watchdog is barking!\n");  in coh901327_interrupt()
222  * Allow only one user (daemon) to open the watchdog
262 		.identity		= "COH 901 327 Watchdog",  in coh901327_ioctl()
338 	.name		= "watchdog",
395 			"watchdog timed out since last chip reset!\n");  in coh901327_probe()
426 	/* Reset the watchdog */  in coh901327_probe()
470 	/* If watchdog is on, disable it here and now */  in coh901327_suspend()
478 	/* Restore the watchdog interrupt */  in coh901327_resume()
481 		/* Restart the watchdog timer */  in coh901327_resume()
495  * Mistreating the watchdog is the only way to perform a software reset of the
504 	 * Timeout = 5s, we have to wait for the watchdog reset to  in coh901327_watchdog_reset()
505 	 * actually take place: the watchdog will be reloaded with the  in coh901327_watchdog_reset()
508 	 * The boot loader will typically deactivate the watchdog, so we  in coh901327_watchdog_reset()
510 	 * deactivating the watchdog before it is shut down by it.  in coh901327_watchdog_reset()
512 	 * NOTE: on future versions of the watchdog, this restriction is  in coh901327_watchdog_reset()
513 	 * gone: the watchdog will be reloaded with a default value (1 min)  in coh901327_watchdog_reset()
514 	 * instead of last value, and you can conveniently set the watchdog  in coh901327_watchdog_reset()
544 MODULE_DESCRIPTION("COH 901 327 Watchdog");
547 MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)");