72 static void omap_wdt_reload(struct omap_wdt_dev *wdev)  in omap_wdt_reload()  argument
74 	void __iomem    *base = wdev->base;  in omap_wdt_reload()
80 	wdev->wdt_trgr_pattern = ~wdev->wdt_trgr_pattern;  in omap_wdt_reload()
81 	writel_relaxed(wdev->wdt_trgr_pattern, (base + OMAP_WATCHDOG_TGR));  in omap_wdt_reload()
89 static void omap_wdt_enable(struct omap_wdt_dev *wdev)  in omap_wdt_enable()  argument
91 	void __iomem *base = wdev->base;  in omap_wdt_enable()
103 static void omap_wdt_disable(struct omap_wdt_dev *wdev)  in omap_wdt_disable()  argument
105 	void __iomem *base = wdev->base;  in omap_wdt_disable()
117 static void omap_wdt_set_timer(struct omap_wdt_dev *wdev,  in omap_wdt_set_timer()  argument
121 	void __iomem *base = wdev->base;  in omap_wdt_set_timer()
134 	struct omap_wdt_dev *wdev = to_omap_wdt_dev(wdog);  in omap_wdt_start()  local
135 	void __iomem *base = wdev->base;  in omap_wdt_start()
137 	mutex_lock(&wdev->lock);  in omap_wdt_start()
139 	wdev->omap_wdt_users = true;  in omap_wdt_start()
141 	pm_runtime_get_sync(wdev->dev);  in omap_wdt_start()
148 	omap_wdt_disable(wdev);  in omap_wdt_start()
158 	omap_wdt_set_timer(wdev, wdog->timeout);  in omap_wdt_start()
159 	omap_wdt_reload(wdev); /* trigger loading of new timeout value */  in omap_wdt_start()
160 	omap_wdt_enable(wdev);  in omap_wdt_start()
162 	mutex_unlock(&wdev->lock);  in omap_wdt_start()
169 	struct omap_wdt_dev *wdev = to_omap_wdt_dev(wdog);  in omap_wdt_stop()  local
171 	mutex_lock(&wdev->lock);  in omap_wdt_stop()
172 	omap_wdt_disable(wdev);  in omap_wdt_stop()
173 	pm_runtime_put_sync(wdev->dev);  in omap_wdt_stop()
174 	wdev->omap_wdt_users = false;  in omap_wdt_stop()
175 	mutex_unlock(&wdev->lock);  in omap_wdt_stop()
181 	struct omap_wdt_dev *wdev = to_omap_wdt_dev(wdog);  in omap_wdt_ping()  local
183 	mutex_lock(&wdev->lock);  in omap_wdt_ping()
184 	omap_wdt_reload(wdev);  in omap_wdt_ping()
185 	mutex_unlock(&wdev->lock);  in omap_wdt_ping()
193 	struct omap_wdt_dev *wdev = to_omap_wdt_dev(wdog);  in omap_wdt_set_timeout()  local
195 	mutex_lock(&wdev->lock);  in omap_wdt_set_timeout()
196 	omap_wdt_disable(wdev);  in omap_wdt_set_timeout()
197 	omap_wdt_set_timer(wdev, timeout);  in omap_wdt_set_timeout()
198 	omap_wdt_enable(wdev);  in omap_wdt_set_timeout()
199 	omap_wdt_reload(wdev);  in omap_wdt_set_timeout()
201 	mutex_unlock(&wdev->lock);  in omap_wdt_set_timeout()
208 	struct omap_wdt_dev *wdev = to_omap_wdt_dev(wdog);  in omap_wdt_get_timeleft()  local
209 	void __iomem *base = wdev->base;  in omap_wdt_get_timeleft()
234 	struct omap_wdt_dev *wdev;  in omap_wdt_probe()  local
237 	wdev = devm_kzalloc(&pdev->dev, sizeof(*wdev), GFP_KERNEL);  in omap_wdt_probe()
238 	if (!wdev)  in omap_wdt_probe()
241 	wdev->omap_wdt_users	= false;  in omap_wdt_probe()
242 	wdev->dev		= &pdev->dev;  in omap_wdt_probe()
243 	wdev->wdt_trgr_pattern	= 0x1234;  in omap_wdt_probe()
244 	mutex_init(&wdev->lock);  in omap_wdt_probe()
248 	wdev->base = devm_ioremap_resource(&pdev->dev, res);  in omap_wdt_probe()
249 	if (IS_ERR(wdev->base))  in omap_wdt_probe()
250 		return PTR_ERR(wdev->base);  in omap_wdt_probe()
252 	wdev->wdog.info = &omap_wdt_info;  in omap_wdt_probe()
253 	wdev->wdog.ops = &omap_wdt_ops;  in omap_wdt_probe()
254 	wdev->wdog.min_timeout = TIMER_MARGIN_MIN;  in omap_wdt_probe()
255 	wdev->wdog.max_timeout = TIMER_MARGIN_MAX;  in omap_wdt_probe()
256 	wdev->wdog.parent = &pdev->dev;  in omap_wdt_probe()
258 	if (watchdog_init_timeout(&wdev->wdog, timer_margin, &pdev->dev) < 0)  in omap_wdt_probe()
259 		wdev->wdog.timeout = TIMER_MARGIN_DEFAULT;  in omap_wdt_probe()
261 	watchdog_set_nowayout(&wdev->wdog, nowayout);  in omap_wdt_probe()
263 	platform_set_drvdata(pdev, wdev);  in omap_wdt_probe()
265 	pm_runtime_enable(wdev->dev);  in omap_wdt_probe()
266 	pm_runtime_get_sync(wdev->dev);  in omap_wdt_probe()
271 			wdev->wdog.bootstatus = WDIOF_CARDRESET;  in omap_wdt_probe()
274 	omap_wdt_disable(wdev);  in omap_wdt_probe()
276 	ret = watchdog_register_device(&wdev->wdog);  in omap_wdt_probe()
278 		pm_runtime_disable(wdev->dev);  in omap_wdt_probe()
283 		readl_relaxed(wdev->base + OMAP_WATCHDOG_REV) & 0xFF,  in omap_wdt_probe()
284 		wdev->wdog.timeout);  in omap_wdt_probe()
286 	pm_runtime_put_sync(wdev->dev);  in omap_wdt_probe()
289 		omap_wdt_start(&wdev->wdog);  in omap_wdt_probe()
296 	struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);  in omap_wdt_shutdown()  local
298 	mutex_lock(&wdev->lock);  in omap_wdt_shutdown()
299 	if (wdev->omap_wdt_users) {  in omap_wdt_shutdown()
300 		omap_wdt_disable(wdev);  in omap_wdt_shutdown()
301 		pm_runtime_put_sync(wdev->dev);  in omap_wdt_shutdown()
303 	mutex_unlock(&wdev->lock);  in omap_wdt_shutdown()
308 	struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);  in omap_wdt_remove()  local
310 	pm_runtime_disable(wdev->dev);  in omap_wdt_remove()
311 	watchdog_unregister_device(&wdev->wdog);  in omap_wdt_remove()
326 	struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);  in omap_wdt_suspend()  local
328 	mutex_lock(&wdev->lock);  in omap_wdt_suspend()
329 	if (wdev->omap_wdt_users) {  in omap_wdt_suspend()
330 		omap_wdt_disable(wdev);  in omap_wdt_suspend()
331 		pm_runtime_put_sync(wdev->dev);  in omap_wdt_suspend()
333 	mutex_unlock(&wdev->lock);  in omap_wdt_suspend()
340 	struct omap_wdt_dev *wdev = platform_get_drvdata(pdev);  in omap_wdt_resume()  local
342 	mutex_lock(&wdev->lock);  in omap_wdt_resume()
343 	if (wdev->omap_wdt_users) {  in omap_wdt_resume()
344 		pm_runtime_get_sync(wdev->dev);  in omap_wdt_resume()
345 		omap_wdt_enable(wdev);  in omap_wdt_resume()
346 		omap_wdt_reload(wdev);  in omap_wdt_resume()
348 	mutex_unlock(&wdev->lock);  in omap_wdt_resume()