1 // SPDX-License-Identifier: GPL-2.0-or-later
30 	struct watchdog_device wdt;  member
37 	writel(0x1, drvdata->base + WDT_SET);  in ls1x_wdt_ping()
46 	unsigned int max_hw_heartbeat = wdt_dev->max_hw_heartbeat_ms / 1000;  in ls1x_wdt_set_timeout()
49 	wdt_dev->timeout = timeout;  in ls1x_wdt_set_timeout()
51 	counts = drvdata->clk_rate * min(timeout, max_hw_heartbeat);  in ls1x_wdt_set_timeout()
52 	writel(counts, drvdata->base + WDT_TIMER);  in ls1x_wdt_set_timeout()
61 	writel(0x1, drvdata->base + WDT_EN);  in ls1x_wdt_start()
70 	writel(0x0, drvdata->base + WDT_EN);  in ls1x_wdt_stop()
80 	writel(0x1, drvdata->base + WDT_EN);  in ls1x_wdt_restart()
81 	writel(0x1, drvdata->base + WDT_TIMER);  in ls1x_wdt_restart()
82 	writel(0x1, drvdata->base + WDT_SET);  in ls1x_wdt_restart()
103 	struct device *dev = &pdev->dev;  in ls1x_wdt_probe()
111 		return -ENOMEM;  in ls1x_wdt_probe()
113 	drvdata->base = devm_platform_ioremap_resource(pdev, 0);  in ls1x_wdt_probe()
114 	if (IS_ERR(drvdata->base))  in ls1x_wdt_probe()
115 		return PTR_ERR(drvdata->base);  in ls1x_wdt_probe()
117 	drvdata->clk = devm_clk_get_enabled(dev, NULL);  in ls1x_wdt_probe()
118 	if (IS_ERR(drvdata->clk))  in ls1x_wdt_probe()
119 		return PTR_ERR(drvdata->clk);  in ls1x_wdt_probe()
121 	clk_rate = clk_get_rate(drvdata->clk);  in ls1x_wdt_probe()
123 		return -EINVAL;  in ls1x_wdt_probe()
124 	drvdata->clk_rate = clk_rate;  in ls1x_wdt_probe()
126 	ls1x_wdt = &drvdata->wdt;  in ls1x_wdt_probe()
127 	ls1x_wdt->info = &ls1x_wdt_info;  in ls1x_wdt_probe()
128 	ls1x_wdt->ops = &ls1x_wdt_ops;  in ls1x_wdt_probe()
129 	ls1x_wdt->timeout = DEFAULT_HEARTBEAT;  in ls1x_wdt_probe()
130 	ls1x_wdt->min_timeout = 1;  in ls1x_wdt_probe()
131 	ls1x_wdt->max_hw_heartbeat_ms = U32_MAX / clk_rate * 1000;  in ls1x_wdt_probe()
132 	ls1x_wdt->parent = dev;  in ls1x_wdt_probe()
138 	err = devm_watchdog_register_device(dev, &drvdata->wdt);  in ls1x_wdt_probe()
151 	{ .compatible = "loongson,ls1b-wdt", },
152 	{ .compatible = "loongson,ls1c-wdt", },
161 		.name = "ls1x-wdt",