drivers/watchdog/max63xx_wdt.c

54 	void (*ping)(struct max63xx_wdt *wdt);
55 	void (*set)(struct max63xx_wdt *wdt, u8 set);
120 	struct max63xx_wdt *wdt = watchdog_get_drvdata(wdd);
122 	wdt->ping(wdt);
128 	struct max63xx_wdt *wdt = watchdog_get_drvdata(wdd);
130 	wdt->set(wdt, wdt->timeout->wdset);
133 	if (wdt->timeout->tdelay == 0)
134 		wdt->ping(wdt);
140 	struct max63xx_wdt *wdt = watchdog_get_drvdata(wdd);
142 	wdt->set(wdt, MAX6369_WDSET_DISABLED);
158 static void max63xx_mmap_ping(struct max63xx_wdt *wdt)
162 	spin_lock(&wdt->lock);
164 	val = __raw_readb(wdt->base);
166 	__raw_writeb(val | MAX6369_WDI, wdt->base);
167 	__raw_writeb(val & ~MAX6369_WDI, wdt->base);
169 	spin_unlock(&wdt->lock);
172 static void max63xx_mmap_set(struct max63xx_wdt *wdt, u8 set)
176 	spin_lock(&wdt->lock);
178 	val = __raw_readb(wdt->base);
181 	__raw_writeb(val, wdt->base);
183 	spin_unlock(&wdt->lock);
186 static int max63xx_mmap_init(struct platform_device *p, struct max63xx_wdt *wdt)
188 	wdt->base = devm_platform_ioremap_resource(p, 0);
189 	if (IS_ERR(wdt->base))
190 		return PTR_ERR(wdt->base);
192 	spin_lock_init(&wdt->lock);
194 	wdt->ping = max63xx_mmap_ping;
195 	wdt->set = max63xx_mmap_set;
202 	struct max63xx_wdt *wdt;
206 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
207 	if (!wdt)
218 	wdt->timeout = max63xx_select_timeout(table, heartbeat);
219 	if (!wdt->timeout) {
225 	err = max63xx_mmap_init(pdev, wdt);
229 	platform_set_drvdata(pdev, &wdt->wdd);
230 	watchdog_set_drvdata(&wdt->wdd, wdt);
232 	wdt->wdd.parent = dev;
233 	wdt->wdd.timeout = wdt->timeout->twd;
234 	wdt->wdd.info = &max63xx_wdt_info;
235 	wdt->wdd.ops = &max63xx_wdt_ops;
237 	watchdog_set_nowayout(&wdt->wdd, nowayout);
239 	err = devm_watchdog_register_device(dev, &wdt->wdd);
244 		 wdt->timeout->twd, wdt->timeout->tdelay);