42 #define wdt_read(wdt, field) \  argument
43 	__raw_readl((wdt)->base + (field))
45 	__raw_writel((val), (wdt)->base + (field))
99 	struct at91wdt *wdt = (struct at91wdt *)dev_id;  in wdt_interrupt()  local
101 	if (wdt_read(wdt, AT91_WDT_SR)) {  in wdt_interrupt()
113 static inline void at91_wdt_reset(struct at91wdt *wdt)  in at91_wdt_reset()  argument
115 	wdt_write(wdt, AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);  in at91_wdt_reset()
123 	struct at91wdt *wdt = (struct at91wdt *)data;  in at91_ping()  local
124 	if (time_before(jiffies, wdt->next_heartbeat) ||  in at91_ping()
125 	    !watchdog_active(&wdt->wdd)) {  in at91_ping()
126 		at91_wdt_reset(wdt);  in at91_ping()
127 		mod_timer(&wdt->timer, jiffies + wdt->heartbeat);  in at91_ping()
135 	struct at91wdt *wdt = to_wdt(wdd);  in at91_wdt_start()  local
137 	wdt->next_heartbeat = jiffies + wdd->timeout * HZ;  in at91_wdt_start()
153 static int at91_wdt_init(struct platform_device *pdev, struct at91wdt *wdt)  in at91_wdt_init()  argument
159 	u32 mask = wdt->mr_mask;  in at91_wdt_init()
164 	tmp = wdt_read(wdt, AT91_WDT_MR);  in at91_wdt_init()
165 	if ((tmp & mask) != (wdt->mr & mask)) {  in at91_wdt_init()
167 			wdt_write(wdt, AT91_WDT_MR, wdt->mr);  in at91_wdt_init()
168 			tmp = wdt_read(wdt, AT91_WDT_MR);  in at91_wdt_init()
173 		if (wdt->mr & AT91_WDT_WDDIS)  in at91_wdt_init()
199 		wdt->heartbeat = max_heartbeat / 4;  in at91_wdt_init()
201 		wdt->heartbeat = max_heartbeat / 2;  in at91_wdt_init()
203 		wdt->heartbeat = min_heartbeat;  in at91_wdt_init()
209 	if ((tmp & AT91_WDT_WDFIEN) && wdt->irq) {  in at91_wdt_init()
210 		err = request_irq(wdt->irq, wdt_interrupt,  in at91_wdt_init()
213 				  pdev->name, wdt);  in at91_wdt_init()
218 	if ((tmp & wdt->mr_mask) != (wdt->mr & wdt->mr_mask))  in at91_wdt_init()
221 			 tmp & wdt->mr_mask, wdt->mr & wdt->mr_mask);  in at91_wdt_init()
223 	setup_timer(&wdt->timer, at91_ping, (unsigned long)wdt);  in at91_wdt_init()
232 	mod_timer(&wdt->timer, jiffies + min_heartbeat);  in at91_wdt_init()
235 	if (watchdog_init_timeout(&wdt->wdd, 0, dev))  in at91_wdt_init()
236 		watchdog_init_timeout(&wdt->wdd, heartbeat, dev);  in at91_wdt_init()
237 	watchdog_set_nowayout(&wdt->wdd, wdt->nowayout);  in at91_wdt_init()
238 	err = watchdog_register_device(&wdt->wdd);  in at91_wdt_init()
242 	wdt->next_heartbeat = jiffies + wdt->wdd.timeout * HZ;  in at91_wdt_init()
247 	del_timer(&wdt->timer);  in at91_wdt_init()
267 static int of_at91wdt_init(struct device_node *np, struct at91wdt *wdt)  in of_at91wdt_init()  argument
274 	wdt->irq = irq_of_parse_and_map(np, 0);  in of_at91wdt_init()
275 	if (!wdt->irq)  in of_at91wdt_init()
276 		dev_warn(wdt->wdd.parent, "failed to get IRQ from DT\n");  in of_at91wdt_init()
293 	wdt->mr_mask = 0x3FFFFFFF;  in of_at91wdt_init()
294 	wdt->mr = 0;  in of_at91wdt_init()
297 		wdt->mr |= AT91_WDT_WDFIEN;  in of_at91wdt_init()
298 		wdt->mr_mask &= ~AT91_WDT_WDRPROC;  in of_at91wdt_init()
300 		wdt->mr |= AT91_WDT_WDRSTEN;  in of_at91wdt_init()
305 		wdt->mr |= AT91_WDT_WDRPROC;  in of_at91wdt_init()
308 		wdt->mr |= AT91_WDT_WDDIS;  in of_at91wdt_init()
309 		wdt->mr_mask &= AT91_WDT_WDDIS;  in of_at91wdt_init()
313 		wdt->mr |= AT91_WDT_WDIDLEHLT;  in of_at91wdt_init()
316 		wdt->mr |= AT91_WDT_WDDBGHLT;  in of_at91wdt_init()
318 	wdt->mr |= max | ((max - min) << 16);  in of_at91wdt_init()
323 static inline int of_at91wdt_init(struct device_node *np, struct at91wdt *wdt)  in of_at91wdt_init()  argument
333 	struct at91wdt *wdt;  in at91wdt_probe()  local
335 	wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);  in at91wdt_probe()
336 	if (!wdt)  in at91wdt_probe()
339 	wdt->mr = (WDT_HW_TIMEOUT * 256) | AT91_WDT_WDRSTEN | AT91_WDT_WDD |  in at91wdt_probe()
341 	wdt->mr_mask = 0x3FFFFFFF;  in at91wdt_probe()
342 	wdt->nowayout = nowayout;  in at91wdt_probe()
343 	wdt->wdd.parent = &pdev->dev;  in at91wdt_probe()
344 	wdt->wdd.info = &at91_wdt_info;  in at91wdt_probe()
345 	wdt->wdd.ops = &at91_wdt_ops;  in at91wdt_probe()
346 	wdt->wdd.timeout = WDT_HEARTBEAT;  in at91wdt_probe()
347 	wdt->wdd.min_timeout = 1;  in at91wdt_probe()
348 	wdt->wdd.max_timeout = 0xFFFF;  in at91wdt_probe()
351 	wdt->base = devm_ioremap_resource(&pdev->dev, r);  in at91wdt_probe()
352 	if (IS_ERR(wdt->base))  in at91wdt_probe()
353 		return PTR_ERR(wdt->base);  in at91wdt_probe()
356 		err = of_at91wdt_init(pdev->dev.of_node, wdt);  in at91wdt_probe()
361 	err = at91_wdt_init(pdev, wdt);  in at91wdt_probe()
365 	platform_set_drvdata(pdev, wdt);  in at91wdt_probe()
368 		wdt->wdd.timeout, wdt->nowayout);  in at91wdt_probe()
375 	struct at91wdt *wdt = platform_get_drvdata(pdev);  in at91wdt_remove()  local
376 	watchdog_unregister_device(&wdt->wdd);  in at91wdt_remove()
379 	del_timer(&wdt->timer);  in at91wdt_remove()