35 	{ .compatible = "aspeed,ast2400-wdt", .data = &ast2400_config },
36 	{ .compatible = "aspeed,ast2500-wdt", .data = &ast2500_config },
37 	{ .compatible = "aspeed,ast2600-wdt", .data = &ast2500_config },
104 static void aspeed_wdt_enable(struct aspeed_wdt *wdt, int count)  in aspeed_wdt_enable()  argument
106 	wdt->ctrl |= WDT_CTRL_ENABLE;  in aspeed_wdt_enable()
108 	writel(0, wdt->base + WDT_CTRL);  in aspeed_wdt_enable()
109 	writel(count, wdt->base + WDT_RELOAD_VALUE);  in aspeed_wdt_enable()
110 	writel(WDT_RESTART_MAGIC, wdt->base + WDT_RESTART);  in aspeed_wdt_enable()
111 	writel(wdt->ctrl, wdt->base + WDT_CTRL);  in aspeed_wdt_enable()
116 	struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);  in aspeed_wdt_start()  local
118 	aspeed_wdt_enable(wdt, wdd->timeout * WDT_RATE_1MHZ);  in aspeed_wdt_start()
125 	struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);  in aspeed_wdt_stop()  local
127 	wdt->ctrl &= ~WDT_CTRL_ENABLE;  in aspeed_wdt_stop()
128 	writel(wdt->ctrl, wdt->base + WDT_CTRL);  in aspeed_wdt_stop()
135 	struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);  in aspeed_wdt_ping()  local
137 	writel(WDT_RESTART_MAGIC, wdt->base + WDT_RESTART);  in aspeed_wdt_ping()
145 	struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);  in aspeed_wdt_set_timeout()  local
152 	writel(actual * WDT_RATE_1MHZ, wdt->base + WDT_RELOAD_VALUE);  in aspeed_wdt_set_timeout()
153 	writel(WDT_RESTART_MAGIC, wdt->base + WDT_RESTART);  in aspeed_wdt_set_timeout()
161 	struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);  in aspeed_wdt_restart()  local
163 	wdt->ctrl &= ~WDT_CTRL_BOOT_SECONDARY;  in aspeed_wdt_restart()
164 	aspeed_wdt_enable(wdt, 128 * WDT_RATE_1MHZ / 1000);  in aspeed_wdt_restart()
175 	struct aspeed_wdt *wdt = dev_get_drvdata(dev);  in access_cs0_show()  local
176 	u32 status = readl(wdt->base + WDT_TIMEOUT_STATUS);  in access_cs0_show()
186 	struct aspeed_wdt *wdt = dev_get_drvdata(dev);  in access_cs0_store()  local
194 		       wdt->base + WDT_CLEAR_TIMEOUT_STATUS);  in access_cs0_store()
246 	struct aspeed_wdt *wdt;  in aspeed_wdt_probe()  local
253 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in aspeed_wdt_probe()
254 	if (!wdt)  in aspeed_wdt_probe()
257 	wdt->base = devm_platform_ioremap_resource(pdev, 0);  in aspeed_wdt_probe()
258 	if (IS_ERR(wdt->base))  in aspeed_wdt_probe()
259 		return PTR_ERR(wdt->base);  in aspeed_wdt_probe()
261 	wdt->wdd.info = &aspeed_wdt_info;  in aspeed_wdt_probe()
262 	wdt->wdd.ops = &aspeed_wdt_ops;  in aspeed_wdt_probe()
263 	wdt->wdd.max_hw_heartbeat_ms = WDT_MAX_TIMEOUT_MS;  in aspeed_wdt_probe()
264 	wdt->wdd.parent = dev;  in aspeed_wdt_probe()
266 	wdt->wdd.timeout = WDT_DEFAULT_TIMEOUT;  in aspeed_wdt_probe()
267 	watchdog_init_timeout(&wdt->wdd, 0, dev);  in aspeed_wdt_probe()
278 	 *  - ast2400 wdt can run at PCLK, or 1MHz  in aspeed_wdt_probe()
284 	if (of_device_is_compatible(np, "aspeed,ast2400-wdt"))  in aspeed_wdt_probe()
285 		wdt->ctrl = WDT_CTRL_1MHZ_CLK;  in aspeed_wdt_probe()
293 		wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC | WDT_CTRL_RESET_SYSTEM;  in aspeed_wdt_probe()
296 			wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU |  in aspeed_wdt_probe()
299 			wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC |  in aspeed_wdt_probe()
302 			wdt->ctrl |= WDT_CTRL_RESET_MODE_FULL_CHIP |  in aspeed_wdt_probe()
308 		wdt->ctrl |= WDT_CTRL_WDT_EXT;  in aspeed_wdt_probe()
310 		wdt->ctrl |= WDT_CTRL_BOOT_SECONDARY;  in aspeed_wdt_probe()
312 	if (readl(wdt->base + WDT_CTRL) & WDT_CTRL_ENABLE)  {  in aspeed_wdt_probe()
315 		 * write wdt->ctrl to WDT_CTRL to ensure the watchdog's  in aspeed_wdt_probe()
319 		aspeed_wdt_start(&wdt->wdd);  in aspeed_wdt_probe()
320 		set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);  in aspeed_wdt_probe()
323 	if ((of_device_is_compatible(np, "aspeed,ast2500-wdt")) ||  in aspeed_wdt_probe()
324 		(of_device_is_compatible(np, "aspeed,ast2600-wdt"))) {  in aspeed_wdt_probe()
325 		u32 reg = readl(wdt->base + WDT_RESET_WIDTH);  in aspeed_wdt_probe()
333 		writel(reg, wdt->base + WDT_RESET_WIDTH);  in aspeed_wdt_probe()
341 		writel(reg, wdt->base + WDT_RESET_WIDTH);  in aspeed_wdt_probe()
367 		writel(duration - 1, wdt->base + WDT_RESET_WIDTH);  in aspeed_wdt_probe()
370 	status = readl(wdt->base + WDT_TIMEOUT_STATUS);  in aspeed_wdt_probe()
372 		wdt->wdd.bootstatus = WDIOF_CARDRESET;  in aspeed_wdt_probe()
374 		if (of_device_is_compatible(np, "aspeed,ast2400-wdt") ||  in aspeed_wdt_probe()
375 		    of_device_is_compatible(np, "aspeed,ast2500-wdt"))  in aspeed_wdt_probe()
376 			wdt->wdd.groups = bswitch_groups;  in aspeed_wdt_probe()
379 	dev_set_drvdata(dev, wdt);  in aspeed_wdt_probe()
381 	return devm_watchdog_register_device(dev, &wdt->wdd);  in aspeed_wdt_probe()