drivers/watchdog/keembay_wdt.c

59 static inline u32 keembay_wdt_readl(struct keembay_wdt *wdt, u32 offset)
61 	return readl(wdt->base + offset);
64 static inline void keembay_wdt_writel(struct keembay_wdt *wdt, u32 offset, u32 val)
66 	writel(WDT_UNLOCK, wdt->base + TIM_SAFE);
67 	writel(val, wdt->base + offset);
72 	struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
74 	keembay_wdt_writel(wdt, TIM_WATCHDOG, wdog->timeout * wdt->rate);
79 	struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
85 	keembay_wdt_writel(wdt, TIM_WATCHDOG_INT_THRES, th_val * wdt->rate);
90 	struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
92 	keembay_wdt_writel(wdt, TIM_WDOG_EN, WDT_ENABLE);
99 	struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
101 	keembay_wdt_writel(wdt, TIM_WDOG_EN, WDT_DISABLE);
135 	struct keembay_wdt *wdt = watchdog_get_drvdata(wdog);
137 	return keembay_wdt_readl(wdt, TIM_WATCHDOG) / wdt->rate;
146 	struct keembay_wdt *wdt = dev_id;
150 	dev_crit(wdt->wdd.parent, "Intel Keem Bay non-secure wdt timeout.\n");
158 	struct keembay_wdt *wdt = dev_id;
161 	keembay_wdt_set_pretimeout(&wdt->wdd, 0x0);
164 	dev_crit(wdt->wdd.parent, "Intel Keem Bay non-secure wdt pre-timeout.\n");
165 	watchdog_notify_pretimeout(&wdt->wdd);
191 	struct keembay_wdt *wdt;
194 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
195 	if (!wdt)
198 	wdt->base = devm_platform_ioremap_resource(pdev, 0);
199 	if (IS_ERR(wdt->base))
200 		return PTR_ERR(wdt->base);
203 	wdt->clk = devm_clk_get(dev, NULL);
204 	if (IS_ERR(wdt->clk))
205 		return dev_err_probe(dev, PTR_ERR(wdt->clk), "Failed to get clock\n");
207 	wdt->rate = clk_get_rate(wdt->clk);
208 	if (!wdt->rate)
211 	wdt->th_irq = platform_get_irq_byname(pdev, "threshold");
212 	if (wdt->th_irq < 0)
213 		return dev_err_probe(dev, wdt->th_irq, "Failed to get IRQ for threshold\n");
215 	ret = devm_request_irq(dev, wdt->th_irq, keembay_wdt_th_isr, 0,
216 			       "keembay-wdt", wdt);
220 	wdt->to_irq = platform_get_irq_byname(pdev, "timeout");
221 	if (wdt->to_irq < 0)
222 		return dev_err_probe(dev, wdt->to_irq, "Failed to get IRQ for timeout\n");
224 	ret = devm_request_irq(dev, wdt->to_irq, keembay_wdt_to_isr, 0,
225 			       "keembay-wdt", wdt);
229 	wdt->wdd.parent		= dev;
230 	wdt->wdd.info		= &keembay_wdt_info;
231 	wdt->wdd.ops		= &keembay_wdt_ops;
232 	wdt->wdd.min_timeout	= WDT_LOAD_MIN;
233 	wdt->wdd.max_timeout	= WDT_LOAD_MAX / wdt->rate;
234 	wdt->wdd.timeout	= WDT_TIMEOUT;
235 	wdt->wdd.pretimeout	= WDT_PRETIMEOUT;
237 	watchdog_set_drvdata(&wdt->wdd, wdt);
238 	watchdog_set_nowayout(&wdt->wdd, nowayout);
239 	watchdog_init_timeout(&wdt->wdd, timeout, dev);
240 	keembay_wdt_set_timeout(&wdt->wdd, wdt->wdd.timeout);
241 	keembay_wdt_set_pretimeout(&wdt->wdd, wdt->wdd.pretimeout);
243 	ret = devm_watchdog_register_device(dev, &wdt->wdd);
247 	platform_set_drvdata(pdev, wdt);
249 		 wdt->wdd.timeout, nowayout ? ", nowayout" : "");
256 	struct keembay_wdt *wdt = dev_get_drvdata(dev);
258 	if (watchdog_active(&wdt->wdd))
259 		return keembay_wdt_stop(&wdt->wdd);
266 	struct keembay_wdt *wdt = dev_get_drvdata(dev);
268 	if (watchdog_active(&wdt->wdd))
269 		return keembay_wdt_start(&wdt->wdd);
278 	{ .compatible = "intel,keembay-wdt" },