1 // SPDX-License-Identifier: GPL-2.0+
3  * Realtek RTD129x watchdog
15 #include <linux/watchdog.h>
38 	val = readl_relaxed(data->base + RTD119X_TCWCR);  in rtd119x_wdt_start()
41 	writel(val, data->base + RTD119X_TCWCR);  in rtd119x_wdt_start()
51 	val = readl_relaxed(data->base + RTD119X_TCWCR);  in rtd119x_wdt_stop()
54 	writel(val, data->base + RTD119X_TCWCR);  in rtd119x_wdt_stop()
63 	writel_relaxed(RTD119X_TCWTR_WDCLR, data->base + RTD119X_TCWTR);  in rtd119x_wdt_ping()
72 	writel(val * clk_get_rate(data->clk), data->base + RTD119X_TCWOV);  in rtd119x_wdt_set_timeout()
74 	data->wdt_dev.timeout = val;  in rtd119x_wdt_set_timeout()
88 	.identity = "rtd119x-wdt",
93 	 { .compatible = "realtek,rtd1295-watchdog" },
99 	struct device *dev = &pdev->dev;  in rtd119x_wdt_probe()
104 		return -ENOMEM;  in rtd119x_wdt_probe()
106 	data->base = devm_platform_ioremap_resource(pdev, 0);  in rtd119x_wdt_probe()
107 	if (IS_ERR(data->base))  in rtd119x_wdt_probe()
108 		return PTR_ERR(data->base);  in rtd119x_wdt_probe()
110 	data->clk = devm_clk_get_enabled(dev, NULL);  in rtd119x_wdt_probe()
111 	if (IS_ERR(data->clk))  in rtd119x_wdt_probe()
112 		return PTR_ERR(data->clk);  in rtd119x_wdt_probe()
114 	data->wdt_dev.info = &rtd119x_wdt_info;  in rtd119x_wdt_probe()
115 	data->wdt_dev.ops = &rtd119x_wdt_ops;  in rtd119x_wdt_probe()
116 	data->wdt_dev.timeout = 120;  in rtd119x_wdt_probe()
117 	data->wdt_dev.max_timeout = 0xffffffff / clk_get_rate(data->clk);  in rtd119x_wdt_probe()
118 	data->wdt_dev.min_timeout = 1;  in rtd119x_wdt_probe()
119 	data->wdt_dev.parent = dev;  in rtd119x_wdt_probe()
121 	watchdog_stop_on_reboot(&data->wdt_dev);  in rtd119x_wdt_probe()
122 	watchdog_set_drvdata(&data->wdt_dev, data);  in rtd119x_wdt_probe()
125 	writel_relaxed(RTD119X_TCWTR_WDCLR, data->base + RTD119X_TCWTR);  in rtd119x_wdt_probe()
126 	rtd119x_wdt_set_timeout(&data->wdt_dev, data->wdt_dev.timeout);  in rtd119x_wdt_probe()
127 	rtd119x_wdt_stop(&data->wdt_dev);  in rtd119x_wdt_probe()
129 	return devm_watchdog_register_device(dev, &data->wdt_dev);  in rtd119x_wdt_probe()
135 		.name = "rtd1295-watchdog",