1 // SPDX-License-Identifier: GPL-2.0-or-later
10 #include <linux/mfd/rohm-bd957x.h>
20 		"Watchdog cannot be stopped once started (default=\"false\")");
38 	gpiod_set_value_cansleep(priv->gpiod_en, 0);  in bd9576_wdt_disable()
46 	gpiod_set_value_cansleep(priv->gpiod_ping, 1);  in bd9576_wdt_ping()
47 	gpiod_set_value_cansleep(priv->gpiod_ping, 0);  in bd9576_wdt_ping()
56 	gpiod_set_value_cansleep(priv->gpiod_en, 1);  in bd9576_wdt_start()
65 	if (!priv->always_running)  in bd9576_wdt_stop()
68 		set_bit(WDOG_HW_RUNNING, &wdd->status);  in bd9576_wdt_stop()
101 		return -EINVAL;  in find_closest_fast()
117 		return -EINVAL;  in find_closest_slow_by_fast()
145 		return -EINVAL;  in find_closest_slow()
160 	struct device *dev = priv->dev;  in bd957x_set_wdt_mode()
172 			dev_err(dev, "bad WDT window for fast timeout\n");  in bd957x_set_wdt_mode()
178 			dev_err(dev, "bad WDT window\n");  in bd957x_set_wdt_mode()
187 			dev_err(dev, "bad WDT window\n");  in bd957x_set_wdt_mode()
192 	slowng <<= ffs(BD957X_WDG_NG_RATIO_MASK) - 1;  in bd957x_set_wdt_mode()
196 	ret = regmap_update_bits(priv->regmap, BD957X_REG_WDT_CONF,  in bd957x_set_wdt_mode()
204 	struct device *dev = &pdev->dev;  in bd9576_wdt_probe()
213 		return -ENOMEM;  in bd9576_wdt_probe()
217 	priv->dev = dev;  in bd9576_wdt_probe()
218 	priv->regmap = dev_get_regmap(dev->parent, NULL);  in bd9576_wdt_probe()
219 	if (!priv->regmap) {  in bd9576_wdt_probe()
221 		return -ENODEV;  in bd9576_wdt_probe()
224 	priv->gpiod_en = devm_fwnode_gpiod_get(dev, dev_fwnode(dev->parent),  in bd9576_wdt_probe()
225 					       "rohm,watchdog-enable",  in bd9576_wdt_probe()
227 					       "watchdog-enable");  in bd9576_wdt_probe()
228 	if (IS_ERR(priv->gpiod_en))  in bd9576_wdt_probe()
229 		return dev_err_probe(dev, PTR_ERR(priv->gpiod_en),  in bd9576_wdt_probe()
230 			      "getting watchdog-enable GPIO failed\n");  in bd9576_wdt_probe()
232 	priv->gpiod_ping = devm_fwnode_gpiod_get(dev, dev_fwnode(dev->parent),  in bd9576_wdt_probe()
233 						 "rohm,watchdog-ping",  in bd9576_wdt_probe()
235 						 "watchdog-ping");  in bd9576_wdt_probe()
236 	if (IS_ERR(priv->gpiod_ping))  in bd9576_wdt_probe()
237 		return dev_err_probe(dev, PTR_ERR(priv->gpiod_ping),  in bd9576_wdt_probe()
238 				     "getting watchdog-ping GPIO failed\n");  in bd9576_wdt_probe()
240 	count = device_property_count_u32(dev->parent, "rohm,hw-timeout-ms");  in bd9576_wdt_probe()
241 	if (count < 0 && count != -EINVAL)  in bd9576_wdt_probe()
246 			return -EINVAL;  in bd9576_wdt_probe()
248 		ret = device_property_read_u32_array(dev->parent,  in bd9576_wdt_probe()
249 						     "rohm,hw-timeout-ms",  in bd9576_wdt_probe()
267 	priv->always_running = device_property_read_bool(dev->parent,  in bd9576_wdt_probe()
268 							 "always-running");  in bd9576_wdt_probe()
270 	watchdog_set_drvdata(&priv->wdd, priv);  in bd9576_wdt_probe()
272 	priv->wdd.info			= &bd957x_wdt_ident;  in bd9576_wdt_probe()
273 	priv->wdd.ops			= &bd957x_wdt_ops;  in bd9576_wdt_probe()
274 	priv->wdd.min_hw_heartbeat_ms	= hw_margin_min;  in bd9576_wdt_probe()
275 	priv->wdd.max_hw_heartbeat_ms	= hw_margin_max;  in bd9576_wdt_probe()
276 	priv->wdd.parent		= dev;  in bd9576_wdt_probe()
277 	priv->wdd.timeout		= WATCHDOG_TIMEOUT;  in bd9576_wdt_probe()
279 	watchdog_init_timeout(&priv->wdd, 0, dev);  in bd9576_wdt_probe()
280 	watchdog_set_nowayout(&priv->wdd, nowayout);  in bd9576_wdt_probe()
282 	watchdog_stop_on_reboot(&priv->wdd);  in bd9576_wdt_probe()
284 	if (priv->always_running)  in bd9576_wdt_probe()
285 		bd9576_wdt_start(&priv->wdd);  in bd9576_wdt_probe()
287 	return devm_watchdog_register_device(dev, &priv->wdd);  in bd9576_wdt_probe()
292 		.name = "bd9576-wdt",
302 MODULE_ALIAS("platform:bd9576-wdt");