2  *      Intel_SCU 0.2:  An Intel SCU IOH Based Watchdog Device
31 #include <linux/watchdog.h>
62 		"Watchdog timer margin"
70 		"Default Watchdog timer setting"
75 /* After watchdog device is closed, check force_boot. If:
76  * force_boot == 0, then force boot on next watchdog interrupt after close,
83 		"the system immediately if the /dev/watchdog device is closed"
84 		"A value of 0 means that when /dev/watchdog device is closed"
85 		"the watchdog timer will be refreshed for one more interval"
87 		"watchdog timer will reset the system."
107 			"System will reset when watchdog timer times out!\n");  in watchdog_fire()
115 		pr_debug("Watchdog timer: value of new_margin %d is out of the range %d to %d\n",  in check_timer_margin()
144 		pr_err("Error setting SCU watchdog timer: %x\n", ipc_ret);  in watchdog_set_ipc()
159 	pr_debug("Watchdog timer: irq, int_status: %x\n", int_status);  in watchdog_timer_interrupt()
166 		pr_debug("Watchdog timer: spurious interrupt received\n");  in watchdog_timer_interrupt()
223 	pr_debug("Watchdog timer: set_heartbeat: timer freq is %d\n",  in intel_scu_set_heartbeat()
225 	pr_debug("Watchdog timer: set_heartbeat: timer_set is %x (hex)\n",  in intel_scu_set_heartbeat()
227 	pr_debug("Watchdog timer: set_hearbeat: timer_margin is %x (hex)\n",  in intel_scu_set_heartbeat()
229 	pr_debug("Watchdog timer: set_heartbeat: threshold is %x (hex)\n",  in intel_scu_set_heartbeat()
231 	pr_debug("Watchdog timer: set_heartbeat: soft_threshold is %x (hex)\n",  in intel_scu_set_heartbeat()
235 	/* watchdog timing come out right. */  in intel_scu_set_heartbeat()
249 		/* Make sure the watchdog timer is stopped */  in intel_scu_set_heartbeat()
267 			pr_err("Watchdog timer: Unable to set timer\n");  in intel_scu_set_heartbeat()
295  * /dev/watchdog handling
301 	/* Set flag to indicate that watchdog device is open */  in intel_scu_open()
315 	 * This watchdog should not be closed, after the timer  in intel_scu_release()
318 	 * immediate reset. If force_boot is not set, the watchdog  in intel_scu_release()
320 	 * of that interval, the watchdog timer will reset the system.  in intel_scu_release()
324 		pr_debug("Watchdog timer: intel_scu_release, without open\n");  in intel_scu_release()
330 		pr_debug("Watchdog timer: closed, without starting timer\n");  in intel_scu_release()
335 	       "Unexpected close of /dev/watchdog!\n");  in intel_scu_release()
357 		/* Watchdog already started, keep it alive */  in intel_scu_write()
360 		/* Start watchdog with timer value set by init */  in intel_scu_write()
380 		.identity =         "Intel_SCU IOH Watchdog"  /* len < 32 */  in intel_scu_ioctl()
421 		/* Turn off the watchdog timer. */  in intel_scu_notify_sys()
447 	 * If it isn't an intel MID device then it doesn't have this watchdog  in intel_scu_watchdog_init()
457 		pr_err("Watchdog timer: value of timer_set %x (hex) "  in intel_scu_watchdog_init()
470 		pr_debug("Watchdog timer - Intel SCU watchdog: timer is not available\n");  in intel_scu_watchdog_init()
475 		pr_debug("Watchdog timer - Intel SCU watchdog - timer %d does not have valid physical memory\n",  in intel_scu_watchdog_init()
481 		pr_debug("Watchdog timer: timer %d invalid irq\n",  in intel_scu_watchdog_init()
490 		pr_debug("Watchdog timer: timer unable to ioremap\n");  in intel_scu_watchdog_init()
515 		pr_err("Watchdog timer: cannot register notifier %d)\n", ret);  in intel_scu_watchdog_init()
520 	watchdog_device.miscdev.name = "watchdog";  in intel_scu_watchdog_init()
525 		pr_err("Watchdog timer: cannot register miscdev %d err =%d\n",  in intel_scu_watchdog_init()
532 		IRQF_SHARED, "watchdog",  in intel_scu_watchdog_init()
535 		pr_err("Watchdog timer: error requesting irq %d\n", ret);  in intel_scu_watchdog_init()
568 MODULE_DESCRIPTION("Intel SCU Watchdog Device Driver");