3  *	W83977F Watchdog Timer Driver for Winbond W83977F I/O Chip
23 #include <linux/watchdog.h>
43 static	int timeoutW;			/* timeout in watchdog counter units */
51 		"Watchdog timeout in seconds (15..7635), default="
54 MODULE_PARM_DESC(testmode, "Watchdog testmode (1 = no reboot), default=0");
59 		"Watchdog cannot be stopped once started (default="
63  * Start the watchdog
77 	 * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.  in wdt_start()
78 	 * F2 has the timeout in watchdog counter units.  in wdt_start()
79 	 * F3 is set to enable watchdog LED blink at timeout.  in wdt_start()
96 	 * Select device Aux1 (dev=7) to set GP16 as the watchdog output  in wdt_start()
97 	 * (in reg E6) and GP13 as the watchdog LED output (in reg E3).  in wdt_start()
100 	 * check watchdog LED on SBC.  in wdt_start()
134  * Stop the watchdog
148 	 * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.  in wdt_stop()
149 	 * F2 is reset to its default value (watchdog timer disabled).  in wdt_stop()
188  * Send a keepalive ping to the watchdog
202 	/* Select device Aux2 (device=8) to kick watchdog reg F2 */  in wdt_keepalive()
217  * Set the watchdog timeout value
225 	 * Convert seconds to watchdog counter time units, rounding up.  in wdt_set_timeout()
226 	 * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup  in wdt_set_timeout()
241 	 * timeoutW is the timeout in watchdog counter units.  in wdt_set_timeout()
249  * Get the watchdog status
263 	/* Select device Aux2 (device=8) to read watchdog reg F4 */  in wdt_get_status()
283  *	/dev/watchdog handling
288 	/* If the watchdog is alive we don't need to start it again */  in wdt_open()
310 		pr_crit("unexpected close, not stopping watchdog!\n");  in wdt_release()
318  *      @file: file handle to the watchdog
323  *      A write to a watchdog device is defined as a keepalive signal. Any
360  *      @cmd: watchdog command
363  *      The watchdog API defines a common set of functions for all watchdogs
456 	.name		= "watchdog",
524 MODULE_DESCRIPTION("Driver for watchdog timer in W83977F I/O chip");