1 // SPDX-License-Identifier: GPL-2.0+
41 	 * peripheral registers for CPU-native byte order.  in bcm7038_wdt_write()
62 	timeout = wdt->rate * wdog->timeout;  in bcm7038_wdt_set_timeout_reg()
64 	bcm7038_wdt_write(timeout, wdt->base + WDT_TIMEOUT_REG);  in bcm7038_wdt_set_timeout_reg()
71 	bcm7038_wdt_write(WDT_START_1, wdt->base + WDT_CMD_REG);  in bcm7038_wdt_ping()
72 	bcm7038_wdt_write(WDT_START_2, wdt->base + WDT_CMD_REG);  in bcm7038_wdt_ping()
89 	bcm7038_wdt_write(WDT_STOP_1, wdt->base + WDT_CMD_REG);  in bcm7038_wdt_stop()
90 	bcm7038_wdt_write(WDT_STOP_2, wdt->base + WDT_CMD_REG);  in bcm7038_wdt_stop()
98 	/* Can't modify timeout value if watchdog timer is running */  in bcm7038_wdt_set_timeout()
100 	wdog->timeout = t;  in bcm7038_wdt_set_timeout()
111 	time_left = bcm7038_wdt_read(wdt->base + WDT_CMD_REG);  in bcm7038_wdt_get_timeleft()
113 	return time_left / wdt->rate;  in bcm7038_wdt_get_timeleft()
117 	.identity	= "Broadcom BCM7038 Watchdog Timer",
132 	struct bcm7038_wdt_platform_data *pdata = pdev->dev.platform_data;  in bcm7038_wdt_probe()
133 	struct device *dev = &pdev->dev;  in bcm7038_wdt_probe()
140 		return -ENOMEM;  in bcm7038_wdt_probe()
144 	wdt->base = devm_platform_ioremap_resource(pdev, 0);  in bcm7038_wdt_probe()
145 	if (IS_ERR(wdt->base))  in bcm7038_wdt_probe()
146 		return PTR_ERR(wdt->base);  in bcm7038_wdt_probe()
148 	if (pdata && pdata->clk_name)  in bcm7038_wdt_probe()
149 		clk_name = pdata->clk_name;  in bcm7038_wdt_probe()
151 	wdt->clk = devm_clk_get_enabled(dev, clk_name);  in bcm7038_wdt_probe()
153 	if (!IS_ERR(wdt->clk)) {  in bcm7038_wdt_probe()
154 		wdt->rate = clk_get_rate(wdt->clk);  in bcm7038_wdt_probe()
155 		/* Prevent divide-by-zero exception */  in bcm7038_wdt_probe()
156 		if (!wdt->rate)  in bcm7038_wdt_probe()
157 			wdt->rate = WDT_DEFAULT_RATE;  in bcm7038_wdt_probe()
159 		wdt->rate = WDT_DEFAULT_RATE;  in bcm7038_wdt_probe()
160 		wdt->clk = NULL;  in bcm7038_wdt_probe()
163 	wdt->wdd.info		= &bcm7038_wdt_info;  in bcm7038_wdt_probe()
164 	wdt->wdd.ops		= &bcm7038_wdt_ops;  in bcm7038_wdt_probe()
165 	wdt->wdd.min_timeout	= WDT_MIN_TIMEOUT;  in bcm7038_wdt_probe()
166 	wdt->wdd.timeout	= WDT_DEFAULT_TIMEOUT;  in bcm7038_wdt_probe()
167 	wdt->wdd.max_timeout	= 0xffffffff / wdt->rate;  in bcm7038_wdt_probe()
168 	wdt->wdd.parent		= dev;  in bcm7038_wdt_probe()
169 	watchdog_set_drvdata(&wdt->wdd, wdt);  in bcm7038_wdt_probe()
171 	watchdog_stop_on_reboot(&wdt->wdd);  in bcm7038_wdt_probe()
172 	watchdog_stop_on_unregister(&wdt->wdd);  in bcm7038_wdt_probe()
173 	err = devm_watchdog_register_device(dev, &wdt->wdd);  in bcm7038_wdt_probe()
186 	if (watchdog_active(&wdt->wdd))  in bcm7038_wdt_suspend()
187 		return bcm7038_wdt_stop(&wdt->wdd);  in bcm7038_wdt_suspend()
196 	if (watchdog_active(&wdt->wdd))  in bcm7038_wdt_resume()
197 		return bcm7038_wdt_start(&wdt->wdd);  in bcm7038_wdt_resume()
206 	{ .compatible = "brcm,bcm6345-wdt" },
207 	{ .compatible = "brcm,bcm7038-wdt" },
213 	{ .name = "bcm63xx-wdt" },
222 		.name		= "bcm7038-wdt",