41 #define IMX2_WDT_WCR_WRE	BIT(3)		/* -> WDOG Reset Enable */
71 	struct watchdog_device wdog;  member
100 static int imx2_wdt_restart(struct watchdog_device *wdog, unsigned long action,  in imx2_wdt_restart()  argument
103 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_restart()
115 	 * Due to imx6q errata ERR004346 (WDOG: WDOG SRS bit requires to be  in imx2_wdt_restart()
130 static inline void imx2_wdt_setup(struct watchdog_device *wdog)  in imx2_wdt_setup()  argument
132 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_setup()
144 	/* Generate internal chip-level reset if WDOG times out */  in imx2_wdt_setup()
153 	val |= WDOG_SEC_TO_COUNT(wdog->timeout);  in imx2_wdt_setup()
171 static int imx2_wdt_ping(struct watchdog_device *wdog)  in imx2_wdt_ping()  argument
173 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_ping()
183 static void __imx2_wdt_set_timeout(struct watchdog_device *wdog,  in __imx2_wdt_set_timeout()  argument
186 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in __imx2_wdt_set_timeout()
192 static int imx2_wdt_set_timeout(struct watchdog_device *wdog,  in imx2_wdt_set_timeout()  argument
198 	__imx2_wdt_set_timeout(wdog, actual);  in imx2_wdt_set_timeout()
199 	wdog->timeout = new_timeout;  in imx2_wdt_set_timeout()
203 static int imx2_wdt_set_pretimeout(struct watchdog_device *wdog,  in imx2_wdt_set_pretimeout()  argument
206 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_set_pretimeout()
211 	wdog->pretimeout = new_pretimeout;  in imx2_wdt_set_pretimeout()
221 	struct watchdog_device *wdog = wdog_arg;  in imx2_wdt_isr()  local
222 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_isr()
227 	watchdog_notify_pretimeout(wdog);  in imx2_wdt_isr()
232 static int imx2_wdt_start(struct watchdog_device *wdog)  in imx2_wdt_start()  argument
234 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_start()
237 		imx2_wdt_set_timeout(wdog, wdog->timeout);  in imx2_wdt_start()
239 		imx2_wdt_setup(wdog);  in imx2_wdt_start()
241 	set_bit(WDOG_HW_RUNNING, &wdog->status);  in imx2_wdt_start()
243 	return imx2_wdt_ping(wdog);  in imx2_wdt_start()
271 	struct watchdog_device *wdog;  in imx2_wdt_probe()  local
297 	wdog			= &wdev->wdog;  in imx2_wdt_probe()
298 	wdog->info		= &imx2_wdt_info;  in imx2_wdt_probe()
299 	wdog->ops		= &imx2_wdt_ops;  in imx2_wdt_probe()
300 	wdog->min_timeout	= 1;  in imx2_wdt_probe()
301 	wdog->timeout		= IMX2_WDT_DEFAULT_TIME;  in imx2_wdt_probe()
302 	wdog->max_hw_heartbeat_ms = IMX2_WDT_MAX_TIME * 1000;  in imx2_wdt_probe()
303 	wdog->parent		= dev;  in imx2_wdt_probe()
310 				      dev_name(dev), wdog))  in imx2_wdt_probe()
311 			wdog->info = &imx2_wdt_pretimeout_info;  in imx2_wdt_probe()
324 	wdog->bootstatus = val & IMX2_WDT_WRSR_TOUT ? WDIOF_CARDRESET : 0;  in imx2_wdt_probe()
342 	platform_set_drvdata(pdev, wdog);  in imx2_wdt_probe()
343 	watchdog_set_drvdata(wdog, wdev);  in imx2_wdt_probe()
344 	watchdog_set_nowayout(wdog, nowayout);  in imx2_wdt_probe()
345 	watchdog_set_restart_priority(wdog, 128);  in imx2_wdt_probe()
346 	watchdog_init_timeout(wdog, timeout, dev);  in imx2_wdt_probe()
348 		watchdog_stop_ping_on_suspend(wdog);  in imx2_wdt_probe()
351 		imx2_wdt_set_timeout(wdog, wdog->timeout);  in imx2_wdt_probe()
352 		set_bit(WDOG_HW_RUNNING, &wdog->status);  in imx2_wdt_probe()
357 	 * down counter will pull down the #WDOG interrupt line for one clock  in imx2_wdt_probe()
362 	return devm_watchdog_register_device(dev, wdog);  in imx2_wdt_probe()
367 	struct watchdog_device *wdog = platform_get_drvdata(pdev);  in imx2_wdt_shutdown()  local
368 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_shutdown()
375 		imx2_wdt_set_timeout(wdog, IMX2_WDT_MAX_TIME);  in imx2_wdt_shutdown()
376 		imx2_wdt_ping(wdog);  in imx2_wdt_shutdown()
384 	struct watchdog_device *wdog = dev_get_drvdata(dev);  in imx2_wdt_suspend()  local
385 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_suspend()
390 		 * Don't update wdog->timeout, we'll restore the current value  in imx2_wdt_suspend()
393 		__imx2_wdt_set_timeout(wdog, IMX2_WDT_MAX_TIME);  in imx2_wdt_suspend()
394 		imx2_wdt_ping(wdog);  in imx2_wdt_suspend()
409 	struct watchdog_device *wdog = dev_get_drvdata(dev);  in imx2_wdt_resume()  local
410 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_resume()
422 	if (watchdog_active(wdog) && !imx2_wdt_is_running(wdev)) {  in imx2_wdt_resume()
428 		imx2_wdt_setup(wdog);  in imx2_wdt_resume()
431 		imx2_wdt_set_timeout(wdog, wdog->timeout);  in imx2_wdt_resume()
432 		imx2_wdt_ping(wdog);  in imx2_wdt_resume()