1 // SPDX-License-Identifier: GPL-2.0-or-later
34 #define DRV_NAME		"sunxi-wdt"
60  * wdt_timeout_map maps the watchdog timer interval value in seconds to
86 	void __iomem *wdt_base = sunxi_wdt->wdt_base;  in sunxi_wdt_restart()
87 	const struct sunxi_wdt_reg *regs = sunxi_wdt->wdt_regs;  in sunxi_wdt_restart()
91 	val = readl(wdt_base + regs->wdt_cfg);  in sunxi_wdt_restart()
92 	val &= ~(regs->wdt_reset_mask);  in sunxi_wdt_restart()
93 	val |= regs->wdt_reset_val;  in sunxi_wdt_restart()
94 	writel(val, wdt_base + regs->wdt_cfg);  in sunxi_wdt_restart()
97 	val = readl(wdt_base + regs->wdt_mode);  in sunxi_wdt_restart()
98 	val &= ~(WDT_TIMEOUT_MASK << regs->wdt_timeout_shift);  in sunxi_wdt_restart()
100 	writel(val, wdt_base + regs->wdt_mode);  in sunxi_wdt_restart()
106 	writel(WDT_CTRL_RELOAD, wdt_base + regs->wdt_ctrl);  in sunxi_wdt_restart()
110 		val = readl(wdt_base + regs->wdt_mode);  in sunxi_wdt_restart()
112 		writel(val, wdt_base + regs->wdt_mode);  in sunxi_wdt_restart()
120 	void __iomem *wdt_base = sunxi_wdt->wdt_base;  in sunxi_wdt_ping()
121 	const struct sunxi_wdt_reg *regs = sunxi_wdt->wdt_regs;  in sunxi_wdt_ping()
123 	writel(WDT_CTRL_RELOAD, wdt_base + regs->wdt_ctrl);  in sunxi_wdt_ping()
132 	void __iomem *wdt_base = sunxi_wdt->wdt_base;  in sunxi_wdt_set_timeout()
133 	const struct sunxi_wdt_reg *regs = sunxi_wdt->wdt_regs;  in sunxi_wdt_set_timeout()
139 	sunxi_wdt->wdt_dev.timeout = timeout;  in sunxi_wdt_set_timeout()
141 	reg = readl(wdt_base + regs->wdt_mode);  in sunxi_wdt_set_timeout()
142 	reg &= ~(WDT_TIMEOUT_MASK << regs->wdt_timeout_shift);  in sunxi_wdt_set_timeout()
143 	reg |= wdt_timeout_map[timeout] << regs->wdt_timeout_shift;  in sunxi_wdt_set_timeout()
144 	writel(reg, wdt_base + regs->wdt_mode);  in sunxi_wdt_set_timeout()
154 	void __iomem *wdt_base = sunxi_wdt->wdt_base;  in sunxi_wdt_stop()
155 	const struct sunxi_wdt_reg *regs = sunxi_wdt->wdt_regs;  in sunxi_wdt_stop()
157 	writel(0, wdt_base + regs->wdt_mode);  in sunxi_wdt_stop()
166 	void __iomem *wdt_base = sunxi_wdt->wdt_base;  in sunxi_wdt_start()
167 	const struct sunxi_wdt_reg *regs = sunxi_wdt->wdt_regs;  in sunxi_wdt_start()
170 	ret = sunxi_wdt_set_timeout(&sunxi_wdt->wdt_dev,  in sunxi_wdt_start()
171 			sunxi_wdt->wdt_dev.timeout);  in sunxi_wdt_start()
176 	reg = readl(wdt_base + regs->wdt_cfg);  in sunxi_wdt_start()
177 	reg &= ~(regs->wdt_reset_mask);  in sunxi_wdt_start()
178 	reg |= regs->wdt_reset_val;  in sunxi_wdt_start()
179 	writel(reg, wdt_base + regs->wdt_cfg);  in sunxi_wdt_start()
182 	reg = readl(wdt_base + regs->wdt_mode);  in sunxi_wdt_start()
184 	writel(reg, wdt_base + regs->wdt_mode);  in sunxi_wdt_start()
224 	{ .compatible = "allwinner,sun4i-a10-wdt", .data = &sun4i_wdt_reg },
225 	{ .compatible = "allwinner,sun6i-a31-wdt", .data = &sun6i_wdt_reg },
232 	struct device *dev = &pdev->dev;  in sunxi_wdt_probe()
238 		return -ENOMEM;  in sunxi_wdt_probe()
240 	sunxi_wdt->wdt_regs = of_device_get_match_data(dev);  in sunxi_wdt_probe()
241 	if (!sunxi_wdt->wdt_regs)  in sunxi_wdt_probe()
242 		return -ENODEV;  in sunxi_wdt_probe()
244 	sunxi_wdt->wdt_base = devm_platform_ioremap_resource(pdev, 0);  in sunxi_wdt_probe()
245 	if (IS_ERR(sunxi_wdt->wdt_base))  in sunxi_wdt_probe()
246 		return PTR_ERR(sunxi_wdt->wdt_base);  in sunxi_wdt_probe()
248 	sunxi_wdt->wdt_dev.info = &sunxi_wdt_info;  in sunxi_wdt_probe()
249 	sunxi_wdt->wdt_dev.ops = &sunxi_wdt_ops;  in sunxi_wdt_probe()
250 	sunxi_wdt->wdt_dev.timeout = WDT_MAX_TIMEOUT;  in sunxi_wdt_probe()
251 	sunxi_wdt->wdt_dev.max_timeout = WDT_MAX_TIMEOUT;  in sunxi_wdt_probe()
252 	sunxi_wdt->wdt_dev.min_timeout = WDT_MIN_TIMEOUT;  in sunxi_wdt_probe()
253 	sunxi_wdt->wdt_dev.parent = dev;  in sunxi_wdt_probe()
255 	watchdog_init_timeout(&sunxi_wdt->wdt_dev, timeout, dev);  in sunxi_wdt_probe()
256 	watchdog_set_nowayout(&sunxi_wdt->wdt_dev, nowayout);  in sunxi_wdt_probe()
257 	watchdog_set_restart_priority(&sunxi_wdt->wdt_dev, 128);  in sunxi_wdt_probe()
259 	watchdog_set_drvdata(&sunxi_wdt->wdt_dev, sunxi_wdt);  in sunxi_wdt_probe()
261 	sunxi_wdt_stop(&sunxi_wdt->wdt_dev);  in sunxi_wdt_probe()
263 	watchdog_stop_on_reboot(&sunxi_wdt->wdt_dev);  in sunxi_wdt_probe()
264 	err = devm_watchdog_register_device(dev, &sunxi_wdt->wdt_dev);  in sunxi_wdt_probe()
269 		 sunxi_wdt->wdt_dev.timeout, nowayout);  in sunxi_wdt_probe()
294 MODULE_DESCRIPTION("sunxi WatchDog Timer Driver");