drivers/watchdog/apple_wdt.c

69 	struct apple_wdt *wdt = to_apple_wdt(wdd);
71 	writel_relaxed(0, wdt->regs + APPLE_WDT_WD1_CUR_TIME);
72 	writel_relaxed(APPLE_WDT_CTRL_RESET_EN, wdt->regs + APPLE_WDT_WD1_CTRL);
79 	struct apple_wdt *wdt = to_apple_wdt(wdd);
81 	writel_relaxed(0, wdt->regs + APPLE_WDT_WD1_CTRL);
88 	struct apple_wdt *wdt = to_apple_wdt(wdd);
90 	writel_relaxed(0, wdt->regs + APPLE_WDT_WD1_CUR_TIME);
97 	struct apple_wdt *wdt = to_apple_wdt(wdd);
99 	writel_relaxed(0, wdt->regs + APPLE_WDT_WD1_CUR_TIME);
100 	writel_relaxed(wdt->clk_rate * s, wdt->regs + APPLE_WDT_WD1_BITE_TIME);
109 	struct apple_wdt *wdt = to_apple_wdt(wdd);
112 	cur_time = readl_relaxed(wdt->regs + APPLE_WDT_WD1_CUR_TIME);
113 	reset_time = readl_relaxed(wdt->regs + APPLE_WDT_WD1_BITE_TIME);
115 	return (reset_time - cur_time) / wdt->clk_rate;
121 	struct apple_wdt *wdt = to_apple_wdt(wdd);
123 	writel_relaxed(APPLE_WDT_CTRL_RESET_EN, wdt->regs + APPLE_WDT_WD1_CTRL);
124 	writel_relaxed(0, wdt->regs + APPLE_WDT_WD1_BITE_TIME);
125 	writel_relaxed(0, wdt->regs + APPLE_WDT_WD1_CUR_TIME);
133 	(void)readl_relaxed(wdt->regs + APPLE_WDT_WD1_CUR_TIME);
157 	struct apple_wdt *wdt;
161 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
162 	if (!wdt)
165 	wdt->regs = devm_platform_ioremap_resource(pdev, 0);
166 	if (IS_ERR(wdt->regs))
167 		return PTR_ERR(wdt->regs);
172 	wdt->clk_rate = clk_get_rate(clk);
173 	if (!wdt->clk_rate)
176 	platform_set_drvdata(pdev, wdt);
178 	wdt->wdd.ops = &apple_wdt_ops;
179 	wdt->wdd.info = &apple_wdt_info;
180 	wdt->wdd.max_timeout = U32_MAX / wdt->clk_rate;
181 	wdt->wdd.timeout = APPLE_WDT_TIMEOUT_DEFAULT;
183 	wdt_ctrl = readl_relaxed(wdt->regs + APPLE_WDT_WD1_CTRL);
185 		set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);
187 	watchdog_init_timeout(&wdt->wdd, 0, dev);
188 	apple_wdt_set_timeout(&wdt->wdd, wdt->wdd.timeout);
189 	watchdog_stop_on_unregister(&wdt->wdd);
190 	watchdog_set_restart_priority(&wdt->wdd, 128);
192 	return devm_watchdog_register_device(dev, &wdt->wdd);
197 	struct apple_wdt *wdt = dev_get_drvdata(dev);
199 	if (watchdog_active(&wdt->wdd) || watchdog_hw_running(&wdt->wdd))
200 		apple_wdt_start(&wdt->wdd);
207 	struct apple_wdt *wdt = dev_get_drvdata(dev);
209 	if (watchdog_active(&wdt->wdd) || watchdog_hw_running(&wdt->wdd))
210 		apple_wdt_stop(&wdt->wdd);
218 	{ .compatible = "apple,wdt" },