40 #define IMX2_WDT_WCR_WRE	BIT(3)		/* -> WDOG Reset Enable */
66 	struct watchdog_device wdog;  member
93 static int imx2_wdt_restart(struct watchdog_device *wdog, unsigned long action,  in imx2_wdt_restart()  argument
96 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_restart()
108 	 * Due to imx6q errata ERR004346 (WDOG: WDOG SRS bit requires to be  in imx2_wdt_restart()
123 static inline void imx2_wdt_setup(struct watchdog_device *wdog)  in imx2_wdt_setup()  argument
125 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_setup()
134 	/* Generate internal chip-level reset if WDOG times out */  in imx2_wdt_setup()
143 	val |= WDOG_SEC_TO_COUNT(wdog->timeout);  in imx2_wdt_setup()
161 static int imx2_wdt_ping(struct watchdog_device *wdog)  in imx2_wdt_ping()  argument
163 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_ping()
173 static void __imx2_wdt_set_timeout(struct watchdog_device *wdog,  in __imx2_wdt_set_timeout()  argument
176 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in __imx2_wdt_set_timeout()
182 static int imx2_wdt_set_timeout(struct watchdog_device *wdog,  in imx2_wdt_set_timeout()  argument
188 	__imx2_wdt_set_timeout(wdog, actual);  in imx2_wdt_set_timeout()
189 	wdog->timeout = new_timeout;  in imx2_wdt_set_timeout()
193 static int imx2_wdt_set_pretimeout(struct watchdog_device *wdog,  in imx2_wdt_set_pretimeout()  argument
196 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_set_pretimeout()
201 	wdog->pretimeout = new_pretimeout;  in imx2_wdt_set_pretimeout()
211 	struct watchdog_device *wdog = wdog_arg;  in imx2_wdt_isr()  local
212 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_isr()
217 	watchdog_notify_pretimeout(wdog);  in imx2_wdt_isr()
222 static int imx2_wdt_start(struct watchdog_device *wdog)  in imx2_wdt_start()  argument
224 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_start()
227 		imx2_wdt_set_timeout(wdog, wdog->timeout);  in imx2_wdt_start()
229 		imx2_wdt_setup(wdog);  in imx2_wdt_start()
231 	set_bit(WDOG_HW_RUNNING, &wdog->status);  in imx2_wdt_start()
233 	return imx2_wdt_ping(wdog);  in imx2_wdt_start()
261 	struct watchdog_device *wdog;  in imx2_wdt_probe()  local
287 	wdog			= &wdev->wdog;  in imx2_wdt_probe()
288 	wdog->info		= &imx2_wdt_info;  in imx2_wdt_probe()
289 	wdog->ops		= &imx2_wdt_ops;  in imx2_wdt_probe()
290 	wdog->min_timeout	= 1;  in imx2_wdt_probe()
291 	wdog->timeout		= IMX2_WDT_DEFAULT_TIME;  in imx2_wdt_probe()
292 	wdog->max_hw_heartbeat_ms = IMX2_WDT_MAX_TIME * 1000;  in imx2_wdt_probe()
293 	wdog->parent		= dev;  in imx2_wdt_probe()
298 				      dev_name(dev), wdog))  in imx2_wdt_probe()
299 			wdog->info = &imx2_wdt_pretimeout_info;  in imx2_wdt_probe()
312 	wdog->bootstatus = val & IMX2_WDT_WRSR_TOUT ? WDIOF_CARDRESET : 0;  in imx2_wdt_probe()
321 	platform_set_drvdata(pdev, wdog);  in imx2_wdt_probe()
322 	watchdog_set_drvdata(wdog, wdev);  in imx2_wdt_probe()
323 	watchdog_set_nowayout(wdog, nowayout);  in imx2_wdt_probe()
324 	watchdog_set_restart_priority(wdog, 128);  in imx2_wdt_probe()
325 	watchdog_init_timeout(wdog, timeout, dev);  in imx2_wdt_probe()
327 		watchdog_stop_ping_on_suspend(wdog);  in imx2_wdt_probe()
330 		imx2_wdt_set_timeout(wdog, wdog->timeout);  in imx2_wdt_probe()
331 		set_bit(WDOG_HW_RUNNING, &wdog->status);  in imx2_wdt_probe()
336 	 * down counter will pull down the #WDOG interrupt line for one clock  in imx2_wdt_probe()
341 	return devm_watchdog_register_device(dev, wdog);  in imx2_wdt_probe()
346 	struct watchdog_device *wdog = platform_get_drvdata(pdev);  in imx2_wdt_shutdown()  local
347 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_shutdown()
354 		imx2_wdt_set_timeout(wdog, IMX2_WDT_MAX_TIME);  in imx2_wdt_shutdown()
355 		imx2_wdt_ping(wdog);  in imx2_wdt_shutdown()
363 	struct watchdog_device *wdog = dev_get_drvdata(dev);  in imx2_wdt_suspend()  local
364 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_suspend()
369 		 * Don't update wdog->timeout, we'll restore the current value  in imx2_wdt_suspend()
372 		__imx2_wdt_set_timeout(wdog, IMX2_WDT_MAX_TIME);  in imx2_wdt_suspend()
373 		imx2_wdt_ping(wdog);  in imx2_wdt_suspend()
388 	struct watchdog_device *wdog = dev_get_drvdata(dev);  in imx2_wdt_resume()  local
389 	struct imx2_wdt_device *wdev = watchdog_get_drvdata(wdog);  in imx2_wdt_resume()
401 	if (watchdog_active(wdog) && !imx2_wdt_is_running(wdev)) {  in imx2_wdt_resume()
407 		imx2_wdt_setup(wdog);  in imx2_wdt_resume()
410 		imx2_wdt_set_timeout(wdog, wdog->timeout);  in imx2_wdt_resume()
411 		imx2_wdt_ping(wdog);  in imx2_wdt_resume()