68 	struct lpc18xx_wdt_dev *lpc18xx_wdt = watchdog_get_drvdata(wdt_dev);  in lpc18xx_wdt_feed()  local
75 	spin_lock_irqsave(&lpc18xx_wdt->lock, flags);  in lpc18xx_wdt_feed()
76 	writel(LPC18XX_WDT_FEED_MAGIC1, lpc18xx_wdt->base + LPC18XX_WDT_FEED);  in lpc18xx_wdt_feed()
77 	writel(LPC18XX_WDT_FEED_MAGIC2, lpc18xx_wdt->base + LPC18XX_WDT_FEED);  in lpc18xx_wdt_feed()
78 	spin_unlock_irqrestore(&lpc18xx_wdt->lock, flags);  in lpc18xx_wdt_feed()
86 	struct lpc18xx_wdt_dev *lpc18xx_wdt = watchdog_get_drvdata(wdt_dev);  in lpc18xx_wdt_timer_feed()  local
91 	mod_timer(&lpc18xx_wdt->timer, jiffies +  in lpc18xx_wdt_timer_feed()
106 static void __lpc18xx_wdt_set_timeout(struct lpc18xx_wdt_dev *lpc18xx_wdt)  in __lpc18xx_wdt_set_timeout()  argument
110 	val = DIV_ROUND_UP(lpc18xx_wdt->wdt_dev.timeout * lpc18xx_wdt->clk_rate,  in __lpc18xx_wdt_set_timeout()
112 	writel(val, lpc18xx_wdt->base + LPC18XX_WDT_TC);  in __lpc18xx_wdt_set_timeout()
118 	struct lpc18xx_wdt_dev *lpc18xx_wdt = watchdog_get_drvdata(wdt_dev);  in lpc18xx_wdt_set_timeout()  local
120 	lpc18xx_wdt->wdt_dev.timeout = new_timeout;  in lpc18xx_wdt_set_timeout()
121 	__lpc18xx_wdt_set_timeout(lpc18xx_wdt);  in lpc18xx_wdt_set_timeout()
128 	struct lpc18xx_wdt_dev *lpc18xx_wdt = watchdog_get_drvdata(wdt_dev);  in lpc18xx_wdt_get_timeleft()  local
131 	val = readl(lpc18xx_wdt->base + LPC18XX_WDT_TV);  in lpc18xx_wdt_get_timeleft()
132 	return (val * LPC18XX_WDT_CLK_DIV) / lpc18xx_wdt->clk_rate;  in lpc18xx_wdt_get_timeleft()
137 	struct lpc18xx_wdt_dev *lpc18xx_wdt = watchdog_get_drvdata(wdt_dev);  in lpc18xx_wdt_start()  local
140 	if (timer_pending(&lpc18xx_wdt->timer))  in lpc18xx_wdt_start()
141 		del_timer(&lpc18xx_wdt->timer);  in lpc18xx_wdt_start()
143 	val = readl(lpc18xx_wdt->base + LPC18XX_WDT_MOD);  in lpc18xx_wdt_start()
146 	writel(val, lpc18xx_wdt->base + LPC18XX_WDT_MOD);  in lpc18xx_wdt_start()
177 	struct lpc18xx_wdt_dev *lpc18xx_wdt = container_of(this,  in lpc18xx_wdt_restart()  local
185 	spin_lock_irqsave(&lpc18xx_wdt->lock, flags);  in lpc18xx_wdt_restart()
187 	val = readl(lpc18xx_wdt->base + LPC18XX_WDT_MOD);  in lpc18xx_wdt_restart()
190 	writel(val, lpc18xx_wdt->base + LPC18XX_WDT_MOD);  in lpc18xx_wdt_restart()
192 	writel(LPC18XX_WDT_FEED_MAGIC1, lpc18xx_wdt->base + LPC18XX_WDT_FEED);  in lpc18xx_wdt_restart()
193 	writel(LPC18XX_WDT_FEED_MAGIC2, lpc18xx_wdt->base + LPC18XX_WDT_FEED);  in lpc18xx_wdt_restart()
195 	writel(LPC18XX_WDT_FEED_MAGIC1, lpc18xx_wdt->base + LPC18XX_WDT_FEED);  in lpc18xx_wdt_restart()
196 	writel(LPC18XX_WDT_FEED_MAGIC1, lpc18xx_wdt->base + LPC18XX_WDT_FEED);  in lpc18xx_wdt_restart()
198 	spin_unlock_irqrestore(&lpc18xx_wdt->lock, flags);  in lpc18xx_wdt_restart()
205 	struct lpc18xx_wdt_dev *lpc18xx_wdt;  in lpc18xx_wdt_probe()  local
210 	lpc18xx_wdt = devm_kzalloc(dev, sizeof(*lpc18xx_wdt), GFP_KERNEL);  in lpc18xx_wdt_probe()
211 	if (!lpc18xx_wdt)  in lpc18xx_wdt_probe()
215 	lpc18xx_wdt->base = devm_ioremap_resource(dev, res);  in lpc18xx_wdt_probe()
216 	if (IS_ERR(lpc18xx_wdt->base))  in lpc18xx_wdt_probe()
217 		return PTR_ERR(lpc18xx_wdt->base);  in lpc18xx_wdt_probe()
219 	lpc18xx_wdt->reg_clk = devm_clk_get(dev, "reg");  in lpc18xx_wdt_probe()
220 	if (IS_ERR(lpc18xx_wdt->reg_clk)) {  in lpc18xx_wdt_probe()
222 		return PTR_ERR(lpc18xx_wdt->reg_clk);  in lpc18xx_wdt_probe()
225 	lpc18xx_wdt->wdt_clk = devm_clk_get(dev, "wdtclk");  in lpc18xx_wdt_probe()
226 	if (IS_ERR(lpc18xx_wdt->wdt_clk)) {  in lpc18xx_wdt_probe()
228 		return PTR_ERR(lpc18xx_wdt->wdt_clk);  in lpc18xx_wdt_probe()
231 	ret = clk_prepare_enable(lpc18xx_wdt->reg_clk);  in lpc18xx_wdt_probe()
237 	ret = clk_prepare_enable(lpc18xx_wdt->wdt_clk);  in lpc18xx_wdt_probe()
244 	lpc18xx_wdt->clk_rate = clk_get_rate(lpc18xx_wdt->wdt_clk);  in lpc18xx_wdt_probe()
245 	if (lpc18xx_wdt->clk_rate == 0) {  in lpc18xx_wdt_probe()
251 	lpc18xx_wdt->wdt_dev.info = &lpc18xx_wdt_info;  in lpc18xx_wdt_probe()
252 	lpc18xx_wdt->wdt_dev.ops = &lpc18xx_wdt_ops;  in lpc18xx_wdt_probe()
254 	lpc18xx_wdt->wdt_dev.min_timeout = DIV_ROUND_UP(LPC18XX_WDT_TC_MIN *  in lpc18xx_wdt_probe()
255 				LPC18XX_WDT_CLK_DIV, lpc18xx_wdt->clk_rate);  in lpc18xx_wdt_probe()
257 	lpc18xx_wdt->wdt_dev.max_timeout = (LPC18XX_WDT_TC_MAX *  in lpc18xx_wdt_probe()
258 				LPC18XX_WDT_CLK_DIV) / lpc18xx_wdt->clk_rate;  in lpc18xx_wdt_probe()
260 	lpc18xx_wdt->wdt_dev.timeout = min(lpc18xx_wdt->wdt_dev.max_timeout,  in lpc18xx_wdt_probe()
263 	spin_lock_init(&lpc18xx_wdt->lock);  in lpc18xx_wdt_probe()
265 	lpc18xx_wdt->wdt_dev.parent = dev;  in lpc18xx_wdt_probe()
266 	watchdog_set_drvdata(&lpc18xx_wdt->wdt_dev, lpc18xx_wdt);  in lpc18xx_wdt_probe()
268 	ret = watchdog_init_timeout(&lpc18xx_wdt->wdt_dev, heartbeat, dev);  in lpc18xx_wdt_probe()
270 	__lpc18xx_wdt_set_timeout(lpc18xx_wdt);  in lpc18xx_wdt_probe()
272 	setup_timer(&lpc18xx_wdt->timer, lpc18xx_wdt_timer_feed,  in lpc18xx_wdt_probe()
273 		    (unsigned long)&lpc18xx_wdt->wdt_dev);  in lpc18xx_wdt_probe()
275 	watchdog_set_nowayout(&lpc18xx_wdt->wdt_dev, nowayout);  in lpc18xx_wdt_probe()
277 	platform_set_drvdata(pdev, lpc18xx_wdt);  in lpc18xx_wdt_probe()
279 	ret = watchdog_register_device(&lpc18xx_wdt->wdt_dev);  in lpc18xx_wdt_probe()
283 	lpc18xx_wdt->restart_handler.notifier_call = lpc18xx_wdt_restart;  in lpc18xx_wdt_probe()
284 	lpc18xx_wdt->restart_handler.priority = 128;  in lpc18xx_wdt_probe()
285 	ret = register_restart_handler(&lpc18xx_wdt->restart_handler);  in lpc18xx_wdt_probe()
292 	clk_disable_unprepare(lpc18xx_wdt->wdt_clk);  in lpc18xx_wdt_probe()
294 	clk_disable_unprepare(lpc18xx_wdt->reg_clk);  in lpc18xx_wdt_probe()
300 	struct lpc18xx_wdt_dev *lpc18xx_wdt = platform_get_drvdata(pdev);  in lpc18xx_wdt_shutdown()  local
302 	lpc18xx_wdt_stop(&lpc18xx_wdt->wdt_dev);  in lpc18xx_wdt_shutdown()
307 	struct lpc18xx_wdt_dev *lpc18xx_wdt = platform_get_drvdata(pdev);  in lpc18xx_wdt_remove()  local
309 	unregister_restart_handler(&lpc18xx_wdt->restart_handler);  in lpc18xx_wdt_remove()
312 	del_timer(&lpc18xx_wdt->timer);  in lpc18xx_wdt_remove()
314 	watchdog_unregister_device(&lpc18xx_wdt->wdt_dev);  in lpc18xx_wdt_remove()
315 	clk_disable_unprepare(lpc18xx_wdt->wdt_clk);  in lpc18xx_wdt_remove()
316 	clk_disable_unprepare(lpc18xx_wdt->reg_clk);  in lpc18xx_wdt_remove()