52 #define wdt_enabled (!(wdt->mr & AT91_WDT_WDDIS))
54 #define wdt_read(wdt, field) \  argument
55 	readl_relaxed((wdt)->reg_base + (field))
60 static void wdt_write(struct sama5d4_wdt *wdt, u32 field, u32 val)  in wdt_write()  argument
67 	while (time_before(jiffies, wdt->last_ping + WDT_DELAY))  in wdt_write()
69 	writel_relaxed(val, wdt->reg_base + field);  in wdt_write()
70 	wdt->last_ping = jiffies;  in wdt_write()
73 static void wdt_write_nosleep(struct sama5d4_wdt *wdt, u32 field, u32 val)  in wdt_write_nosleep()  argument
75 	if (time_before(jiffies, wdt->last_ping + WDT_DELAY))  in wdt_write_nosleep()
77 	writel_relaxed(val, wdt->reg_base + field);  in wdt_write_nosleep()
78 	wdt->last_ping = jiffies;  in wdt_write_nosleep()
83 	struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd);  in sama5d4_wdt_start()  local
85 	if (wdt->sam9x60_support) {  in sama5d4_wdt_start()
86 		writel_relaxed(wdt->ir, wdt->reg_base + AT91_SAM9X60_IER);  in sama5d4_wdt_start()
87 		wdt->mr &= ~AT91_SAM9X60_WDDIS;  in sama5d4_wdt_start()
89 		wdt->mr &= ~AT91_WDT_WDDIS;  in sama5d4_wdt_start()
91 	wdt_write(wdt, AT91_WDT_MR, wdt->mr);  in sama5d4_wdt_start()
98 	struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd);  in sama5d4_wdt_stop()  local
100 	if (wdt->sam9x60_support) {  in sama5d4_wdt_stop()
101 		writel_relaxed(wdt->ir, wdt->reg_base + AT91_SAM9X60_IDR);  in sama5d4_wdt_stop()
102 		wdt->mr |= AT91_SAM9X60_WDDIS;  in sama5d4_wdt_stop()
104 		wdt->mr |= AT91_WDT_WDDIS;  in sama5d4_wdt_stop()
106 	wdt_write(wdt, AT91_WDT_MR, wdt->mr);  in sama5d4_wdt_stop()
113 	struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd);  in sama5d4_wdt_ping()  local
115 	wdt_write(wdt, AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);  in sama5d4_wdt_ping()
123 	struct sama5d4_wdt *wdt = watchdog_get_drvdata(wdd);  in sama5d4_wdt_set_timeout()  local
126 	if (wdt->sam9x60_support) {  in sama5d4_wdt_set_timeout()
127 		wdt_write(wdt, AT91_SAM9X60_WLR,  in sama5d4_wdt_set_timeout()
134 	wdt->mr &= ~AT91_WDT_WDV;  in sama5d4_wdt_set_timeout()
135 	wdt->mr |= AT91_WDT_SET_WDV(value);  in sama5d4_wdt_set_timeout()
145 		wdt_write(wdt, AT91_WDT_MR, wdt->mr & ~AT91_WDT_WDDIS);  in sama5d4_wdt_set_timeout()
167 	struct sama5d4_wdt *wdt = platform_get_drvdata(dev_id);  in sama5d4_wdt_irq_handler()  local
170 	if (wdt->sam9x60_support)  in sama5d4_wdt_irq_handler()
171 		reg = wdt_read(wdt, AT91_SAM9X60_ISR);  in sama5d4_wdt_irq_handler()
173 		reg = wdt_read(wdt, AT91_WDT_SR);  in sama5d4_wdt_irq_handler()
184 static int of_sama5d4_wdt_init(struct device_node *np, struct sama5d4_wdt *wdt)  in of_sama5d4_wdt_init()  argument
188 	if (wdt->sam9x60_support)  in of_sama5d4_wdt_init()
189 		wdt->mr = AT91_SAM9X60_WDDIS;  in of_sama5d4_wdt_init()
191 		wdt->mr = AT91_WDT_WDDIS;  in of_sama5d4_wdt_init()
195 		wdt->need_irq = true;  in of_sama5d4_wdt_init()
198 		wdt->mr |= AT91_WDT_WDIDLEHLT;  in of_sama5d4_wdt_init()
201 		wdt->mr |= AT91_WDT_WDDBGHLT;  in of_sama5d4_wdt_init()
206 static int sama5d4_wdt_init(struct sama5d4_wdt *wdt)  in sama5d4_wdt_init()  argument
218 		reg = wdt_read(wdt, AT91_WDT_MR);  in sama5d4_wdt_init()
219 		if (wdt->sam9x60_support && (!(reg & AT91_SAM9X60_WDDIS)))  in sama5d4_wdt_init()
220 			wdt_write_nosleep(wdt, AT91_WDT_MR,  in sama5d4_wdt_init()
222 		else if (!wdt->sam9x60_support &&  in sama5d4_wdt_init()
224 			wdt_write_nosleep(wdt, AT91_WDT_MR,  in sama5d4_wdt_init()
228 	if (wdt->sam9x60_support) {  in sama5d4_wdt_init()
229 		if (wdt->need_irq)  in sama5d4_wdt_init()
230 			wdt->ir = AT91_SAM9X60_PERINT;  in sama5d4_wdt_init()
232 			wdt->mr |= AT91_SAM9X60_PERIODRST;  in sama5d4_wdt_init()
234 		wdt_write(wdt, AT91_SAM9X60_IER, wdt->ir);  in sama5d4_wdt_init()
235 		wdt_write(wdt, AT91_SAM9X60_WLR, AT91_SAM9X60_SET_COUNTER(val));  in sama5d4_wdt_init()
237 		wdt->mr |= AT91_WDT_SET_WDD(WDT_SEC2TICKS(MAX_WDT_TIMEOUT));  in sama5d4_wdt_init()
238 		wdt->mr |= AT91_WDT_SET_WDV(val);  in sama5d4_wdt_init()
240 		if (wdt->need_irq)  in sama5d4_wdt_init()
241 			wdt->mr |= AT91_WDT_WDFIEN;  in sama5d4_wdt_init()
243 			wdt->mr |= AT91_WDT_WDRSTEN;  in sama5d4_wdt_init()
246 	wdt_write_nosleep(wdt, AT91_WDT_MR, wdt->mr);  in sama5d4_wdt_init()
255 	struct sama5d4_wdt *wdt;  in sama5d4_wdt_probe()  local
260 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in sama5d4_wdt_probe()
261 	if (!wdt)  in sama5d4_wdt_probe()
264 	wdd = &wdt->wdd;  in sama5d4_wdt_probe()
270 	wdt->last_ping = jiffies;  in sama5d4_wdt_probe()
271 	wdt->sam9x60_support = of_device_is_compatible(dev->of_node,  in sama5d4_wdt_probe()
272 						       "microchip,sam9x60-wdt");  in sama5d4_wdt_probe()
274 	watchdog_set_drvdata(wdd, wdt);  in sama5d4_wdt_probe()
280 	wdt->reg_base = regs;  in sama5d4_wdt_probe()
282 	ret = of_sama5d4_wdt_init(dev->of_node, wdt);  in sama5d4_wdt_probe()
286 	if (wdt->need_irq) {  in sama5d4_wdt_probe()
290 			wdt->need_irq = false;  in sama5d4_wdt_probe()
294 	if (wdt->need_irq) {  in sama5d4_wdt_probe()
306 	ret = sama5d4_wdt_init(wdt);  in sama5d4_wdt_probe()
317 	platform_set_drvdata(pdev, wdt);  in sama5d4_wdt_probe()
327 		.compatible = "atmel,sama5d4-wdt",
330 		.compatible = "microchip,sam9x60-wdt",
339 	struct sama5d4_wdt *wdt = dev_get_drvdata(dev);  in sama5d4_wdt_suspend_late()  local
341 	if (watchdog_active(&wdt->wdd))  in sama5d4_wdt_suspend_late()
342 		sama5d4_wdt_stop(&wdt->wdd);  in sama5d4_wdt_suspend_late()
349 	struct sama5d4_wdt *wdt = dev_get_drvdata(dev);  in sama5d4_wdt_resume_early()  local
356 	sama5d4_wdt_init(wdt);  in sama5d4_wdt_resume_early()
358 	if (watchdog_active(&wdt->wdd))  in sama5d4_wdt_resume_early()
359 		sama5d4_wdt_start(&wdt->wdd);  in sama5d4_wdt_resume_early()