1 // SPDX-License-Identifier: GPL-2.0
35 #define SEC_TO_WDTTIMSET_PRD(sec) \  argument
36 		(ilog2(sec) + WDTTIMSET_PERIOD_1_SEC)
44 static unsigned int timeout = 0;  variable
62 	ret = regmap_write_bits(wdev->regmap, WDTCTRL,  in uniphier_watchdog_ping()
69 		ret = regmap_read_poll_timeout(wdev->regmap, WDTCTRL, val,  in uniphier_watchdog_ping()
76 static int __uniphier_watchdog_start(struct regmap *regmap, unsigned int sec)  in __uniphier_watchdog_start()  argument
89 			   SEC_TO_WDTTIMSET_PRD(sec));  in __uniphier_watchdog_start()
113 static int __uniphier_watchdog_restart(struct regmap *regmap, unsigned int sec)  in __uniphier_watchdog_restart()  argument
121 	return __uniphier_watchdog_start(regmap, sec);  in __uniphier_watchdog_restart()
129 	tmp_timeout = roundup_pow_of_two(w->timeout);  in uniphier_watchdog_start()
131 	return __uniphier_watchdog_start(wdev->regmap, tmp_timeout);  in uniphier_watchdog_start()
138 	return __uniphier_watchdog_stop(wdev->regmap);  in uniphier_watchdog_stop()
149 	if (tmp_timeout == w->timeout)  in uniphier_watchdog_set_timeout()
153 		ret = __uniphier_watchdog_restart(wdev->regmap, tmp_timeout);  in uniphier_watchdog_set_timeout()
158 	w->timeout = tmp_timeout;  in uniphier_watchdog_set_timeout()
167 	.identity	= "uniphier-wdt",
184 	struct device *dev = &pdev->dev;  in uniphier_wdt_probe()
192 		return -ENOMEM;  in uniphier_wdt_probe()
194 	parent = of_get_parent(dev->of_node); /* parent should be syscon node */  in uniphier_wdt_probe()
200 	wdev->regmap = regmap;  in uniphier_wdt_probe()
201 	wdev->wdt_dev.info = &uniphier_wdt_info;  in uniphier_wdt_probe()
202 	wdev->wdt_dev.ops = &uniphier_wdt_ops;  in uniphier_wdt_probe()
203 	wdev->wdt_dev.max_timeout = WDT_PERIOD_MAX;  in uniphier_wdt_probe()
204 	wdev->wdt_dev.min_timeout = WDT_PERIOD_MIN;  in uniphier_wdt_probe()
205 	wdev->wdt_dev.timeout = WDT_DEFAULT_TIMEOUT;  in uniphier_wdt_probe()
206 	wdev->wdt_dev.parent = dev;  in uniphier_wdt_probe()
208 	watchdog_init_timeout(&wdev->wdt_dev, timeout, dev);  in uniphier_wdt_probe()
209 	watchdog_set_nowayout(&wdev->wdt_dev, nowayout);  in uniphier_wdt_probe()
210 	watchdog_stop_on_reboot(&wdev->wdt_dev);  in uniphier_wdt_probe()
212 	watchdog_set_drvdata(&wdev->wdt_dev, wdev);  in uniphier_wdt_probe()
214 	uniphier_watchdog_stop(&wdev->wdt_dev);  in uniphier_wdt_probe()
215 	ret = regmap_write(wdev->regmap, WDTRSTSEL, WDTRSTSEL_RSTSEL_BOTH);  in uniphier_wdt_probe()
219 	ret = devm_watchdog_register_device(dev, &wdev->wdt_dev);  in uniphier_wdt_probe()
223 	dev_info(dev, "watchdog driver (timeout=%d sec, nowayout=%d)\n",  in uniphier_wdt_probe()
224 		 wdev->wdt_dev.timeout, nowayout);  in uniphier_wdt_probe()
230 	{ .compatible = "socionext,uniphier-wdt" },
238 		.name		= "uniphier-wdt",
245 module_param(timeout, uint, 0000);
246 MODULE_PARM_DESC(timeout,
247 	"Watchdog timeout seconds in power of 2. (0 < timeout < 128, default="