1 // SPDX-License-Identifier: GPL-2.0
3  * Watchdog driver for the MEN z069 IP-Core
15 	void __iomem *base;  member
16 	struct resource *mem;  member
39 	val = readw(drv->base + MEN_Z069_WTR);  in men_z069_wdt_start()
41 	writew(val, drv->base + MEN_Z069_WTR);  in men_z069_wdt_start()
51 	val = readw(drv->base + MEN_Z069_WTR);  in men_z069_wdt_stop()
53 	writew(val, drv->base + MEN_Z069_WTR);  in men_z069_wdt_stop()
64 	val = readw(drv->base + MEN_Z069_WVR);  in men_z069_wdt_ping()
66 	writew(val, drv->base + MEN_Z069_WVR);  in men_z069_wdt_ping()
77 	wdt->timeout = timeout;  in men_z069_wdt_set_timeout()
80 	reg = readw(drv->base + MEN_Z069_WTR);  in men_z069_wdt_set_timeout()
83 	writew(reg, drv->base + MEN_Z069_WTR);  in men_z069_wdt_set_timeout()
105 	struct resource *mem;  in men_z069_probe()  local
107 	drv = devm_kzalloc(&dev->dev, sizeof(struct men_z069_drv), GFP_KERNEL);  in men_z069_probe()
109 		return -ENOMEM;  in men_z069_probe()
111 	mem = mcb_request_mem(dev, "z069-wdt");  in men_z069_probe()
112 	if (IS_ERR(mem))  in men_z069_probe()
113 		return PTR_ERR(mem);  in men_z069_probe()
115 	drv->base = devm_ioremap(&dev->dev, mem->start, resource_size(mem));  in men_z069_probe()
116 	if (drv->base == NULL)  in men_z069_probe()
119 	drv->mem = mem;  in men_z069_probe()
120 	drv->wdt.info = &men_z069_info;  in men_z069_probe()
121 	drv->wdt.ops = &men_z069_ops;  in men_z069_probe()
122 	drv->wdt.timeout = MEN_Z069_DEFAULT_TIMEOUT;  in men_z069_probe()
123 	drv->wdt.min_timeout = 1;  in men_z069_probe()
124 	drv->wdt.max_timeout = MEN_Z069_WDT_COUNTER_MAX / MEN_Z069_TIMER_FREQ;  in men_z069_probe()
126 	watchdog_init_timeout(&drv->wdt, 0, &dev->dev);  in men_z069_probe()
127 	watchdog_set_nowayout(&drv->wdt, nowayout);  in men_z069_probe()
128 	watchdog_set_drvdata(&drv->wdt, drv);  in men_z069_probe()
129 	drv->wdt.parent = &dev->dev;  in men_z069_probe()
132 	return watchdog_register_device(&drv->wdt);  in men_z069_probe()
135 	mcb_release_mem(mem);  in men_z069_probe()
136 	return -ENOMEM;  in men_z069_probe()
143 	watchdog_unregister_device(&drv->wdt);  in men_z069_remove()
144 	mcb_release_mem(drv->mem);  in men_z069_remove()
155 		.name = "z069-wdt",
164 MODULE_DESCRIPTION("Watchdog driver for the MEN z069 IP-Core");