56 	void (*ping)(struct max63xx_wdt *wdt);
57 	void (*set)(struct max63xx_wdt *wdt, u8 set);
122 	struct max63xx_wdt *wdt = watchdog_get_drvdata(wdd);  in max63xx_wdt_ping()  local
124 	wdt->ping(wdt);  in max63xx_wdt_ping()
130 	struct max63xx_wdt *wdt = watchdog_get_drvdata(wdd);  in max63xx_wdt_start()  local
132 	wdt->set(wdt, wdt->timeout->wdset);  in max63xx_wdt_start()
135 	if (wdt->timeout->tdelay == 0)  in max63xx_wdt_start()
136 		wdt->ping(wdt);  in max63xx_wdt_start()
142 	struct max63xx_wdt *wdt = watchdog_get_drvdata(wdd);  in max63xx_wdt_stop()  local
144 	wdt->set(wdt, MAX6369_WDSET_DISABLED);  in max63xx_wdt_stop()
160 static void max63xx_mmap_ping(struct max63xx_wdt *wdt)  in max63xx_mmap_ping()  argument
164 	spin_lock(&wdt->lock);  in max63xx_mmap_ping()
166 	val = __raw_readb(wdt->base);  in max63xx_mmap_ping()
168 	__raw_writeb(val | MAX6369_WDI, wdt->base);  in max63xx_mmap_ping()
169 	__raw_writeb(val & ~MAX6369_WDI, wdt->base);  in max63xx_mmap_ping()
171 	spin_unlock(&wdt->lock);  in max63xx_mmap_ping()
174 static void max63xx_mmap_set(struct max63xx_wdt *wdt, u8 set)  in max63xx_mmap_set()  argument
178 	spin_lock(&wdt->lock);  in max63xx_mmap_set()
180 	val = __raw_readb(wdt->base);  in max63xx_mmap_set()
183 	__raw_writeb(val, wdt->base);  in max63xx_mmap_set()
185 	spin_unlock(&wdt->lock);  in max63xx_mmap_set()
188 static int max63xx_mmap_init(struct platform_device *p, struct max63xx_wdt *wdt)  in max63xx_mmap_init()  argument
190 	wdt->base = devm_platform_ioremap_resource(p, 0);  in max63xx_mmap_init()
191 	if (IS_ERR(wdt->base))  in max63xx_mmap_init()
192 		return PTR_ERR(wdt->base);  in max63xx_mmap_init()
194 	spin_lock_init(&wdt->lock);  in max63xx_mmap_init()
196 	wdt->ping = max63xx_mmap_ping;  in max63xx_mmap_init()
197 	wdt->set = max63xx_mmap_set;  in max63xx_mmap_init()
204 	struct max63xx_wdt *wdt;  in max63xx_wdt_probe()  local
208 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in max63xx_wdt_probe()
209 	if (!wdt)  in max63xx_wdt_probe()
217 	wdt->timeout = max63xx_select_timeout(table, heartbeat);  in max63xx_wdt_probe()
218 	if (!wdt->timeout) {  in max63xx_wdt_probe()
224 	err = max63xx_mmap_init(pdev, wdt);  in max63xx_wdt_probe()
228 	platform_set_drvdata(pdev, &wdt->wdd);  in max63xx_wdt_probe()
229 	watchdog_set_drvdata(&wdt->wdd, wdt);  in max63xx_wdt_probe()
231 	wdt->wdd.parent = dev;  in max63xx_wdt_probe()
232 	wdt->wdd.timeout = wdt->timeout->twd;  in max63xx_wdt_probe()
233 	wdt->wdd.info = &max63xx_wdt_info;  in max63xx_wdt_probe()
234 	wdt->wdd.ops = &max63xx_wdt_ops;  in max63xx_wdt_probe()
236 	watchdog_set_nowayout(&wdt->wdd, nowayout);  in max63xx_wdt_probe()
238 	err = devm_watchdog_register_device(dev, &wdt->wdd);  in max63xx_wdt_probe()
243 		 wdt->timeout->twd, wdt->timeout->tdelay);  in max63xx_wdt_probe()