1 // SPDX-License-Identifier: GPL-2.0-only
14 #define DRIVER_NAME "rn5t618-wdt"
23 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
50 	struct rn5t618_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in rn5t618_wdt_set_timeout()  local
59 		return -EINVAL;  in rn5t618_wdt_set_timeout()
61 	ret = regmap_update_bits(wdt->rn5t618->regmap, RN5T618_WATCHDOG,  in rn5t618_wdt_set_timeout()
65 		wdt_dev->timeout = rn5t618_wdt_map[i].time;  in rn5t618_wdt_set_timeout()
72 	struct rn5t618_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in rn5t618_wdt_start()  local
75 	ret = rn5t618_wdt_set_timeout(wdt_dev, wdt_dev->timeout);  in rn5t618_wdt_start()
79 	/* enable repower-on */  in rn5t618_wdt_start()
80 	ret = regmap_update_bits(wdt->rn5t618->regmap, RN5T618_REPCNT,  in rn5t618_wdt_start()
86 	/* enable watchdog */  in rn5t618_wdt_start()
87 	ret = regmap_update_bits(wdt->rn5t618->regmap, RN5T618_WATCHDOG,  in rn5t618_wdt_start()
93 	/* enable watchdog interrupt */  in rn5t618_wdt_start()
94 	return regmap_update_bits(wdt->rn5t618->regmap, RN5T618_PWRIREN,  in rn5t618_wdt_start()
101 	struct rn5t618_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in rn5t618_wdt_stop()  local
103 	return regmap_update_bits(wdt->rn5t618->regmap, RN5T618_WATCHDOG,  in rn5t618_wdt_stop()
109 	struct rn5t618_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in rn5t618_wdt_ping()  local
114 	ret = regmap_read(wdt->rn5t618->regmap, RN5T618_WATCHDOG, &val);  in rn5t618_wdt_ping()
118 	ret = regmap_write(wdt->rn5t618->regmap, RN5T618_WATCHDOG, val);  in rn5t618_wdt_ping()
123 	return regmap_update_bits(wdt->rn5t618->regmap, RN5T618_PWRIRQ,  in rn5t618_wdt_ping()
143 	struct device *dev = &pdev->dev;  in rn5t618_wdt_probe()
144 	struct rn5t618 *rn5t618 = dev_get_drvdata(dev->parent);  in rn5t618_wdt_probe()
145 	struct rn5t618_wdt *wdt;  in rn5t618_wdt_probe()  local
150 	wdt = devm_kzalloc(dev, sizeof(struct rn5t618_wdt), GFP_KERNEL);  in rn5t618_wdt_probe()
151 	if (!wdt)  in rn5t618_wdt_probe()
152 		return -ENOMEM;  in rn5t618_wdt_probe()
155 	max_timeout = rn5t618_wdt_map[ARRAY_SIZE(rn5t618_wdt_map) - 1].time;  in rn5t618_wdt_probe()
157 	wdt->rn5t618 = rn5t618;  in rn5t618_wdt_probe()
158 	wdt->wdt_dev.info = &rn5t618_wdt_info;  in rn5t618_wdt_probe()
159 	wdt->wdt_dev.ops = &rn5t618_wdt_ops;  in rn5t618_wdt_probe()
160 	wdt->wdt_dev.min_timeout = min_timeout;  in rn5t618_wdt_probe()
161 	wdt->wdt_dev.max_timeout = max_timeout;  in rn5t618_wdt_probe()
162 	wdt->wdt_dev.timeout = max_timeout;  in rn5t618_wdt_probe()
163 	wdt->wdt_dev.parent = dev;  in rn5t618_wdt_probe()
165 	/* Read out previous power-off factor */  in rn5t618_wdt_probe()
166 	ret = regmap_read(wdt->rn5t618->regmap, RN5T618_POFFHIS, &val);  in rn5t618_wdt_probe()
171 		wdt->wdt_dev.bootstatus = WDIOF_POWERUNDER;  in rn5t618_wdt_probe()
173 		wdt->wdt_dev.bootstatus = WDIOF_CARDRESET;  in rn5t618_wdt_probe()
175 	watchdog_set_drvdata(&wdt->wdt_dev, wdt);  in rn5t618_wdt_probe()
176 	watchdog_init_timeout(&wdt->wdt_dev, timeout, dev);  in rn5t618_wdt_probe()
177 	watchdog_set_nowayout(&wdt->wdt_dev, nowayout);  in rn5t618_wdt_probe()
179 	platform_set_drvdata(pdev, wdt);  in rn5t618_wdt_probe()
181 	return devm_watchdog_register_device(dev, &wdt->wdt_dev);  in rn5t618_wdt_probe()
193 MODULE_ALIAS("platform:rn5t618-wdt");