1 // SPDX-License-Identifier: GPL-2.0-or-later
9 #include <linux/gpio/consumer.h>
10 #include <linux/mfd/rohm-bd957x.h>
37 	gpiod_set_value_cansleep(priv->gpiod_en, 0);  in bd9576_wdt_disable()
45 	gpiod_set_value_cansleep(priv->gpiod_ping, 1);  in bd9576_wdt_ping()
46 	gpiod_set_value_cansleep(priv->gpiod_ping, 0);  in bd9576_wdt_ping()
55 	gpiod_set_value_cansleep(priv->gpiod_en, 1);  in bd9576_wdt_start()
97 		return -EINVAL;  in find_closest_fast()
113 		return -EINVAL;  in find_closest_slow_by_fast()
141 		return -EINVAL;  in find_closest_slow()
156 	struct device *dev = priv->dev;  in bd957x_set_wdt_mode()
168 			dev_err(dev, "bad WDT window for fast timeout\n");  in bd957x_set_wdt_mode()
174 			dev_err(dev, "bad WDT window\n");  in bd957x_set_wdt_mode()
183 			dev_err(dev, "bad WDT window\n");  in bd957x_set_wdt_mode()
188 	slowng <<= ffs(BD957X_WDG_NG_RATIO_MASK) - 1;  in bd957x_set_wdt_mode()
192 	ret = regmap_update_bits(priv->regmap, BD957X_REG_WDT_CONF,  in bd957x_set_wdt_mode()
200 	struct device *dev = &pdev->dev;  in bd9576_wdt_probe()
209 		return -ENOMEM;  in bd9576_wdt_probe()
213 	priv->dev = dev;  in bd9576_wdt_probe()
214 	priv->regmap = dev_get_regmap(dev->parent, NULL);  in bd9576_wdt_probe()
215 	if (!priv->regmap) {  in bd9576_wdt_probe()
217 		return -ENODEV;  in bd9576_wdt_probe()
220 	priv->gpiod_en = devm_fwnode_gpiod_get(dev, dev_fwnode(dev->parent),  in bd9576_wdt_probe()
221 					       "rohm,watchdog-enable",  in bd9576_wdt_probe()
223 					       "watchdog-enable");  in bd9576_wdt_probe()
224 	if (IS_ERR(priv->gpiod_en))  in bd9576_wdt_probe()
225 		return dev_err_probe(dev, PTR_ERR(priv->gpiod_en),  in bd9576_wdt_probe()
226 			      "getting watchdog-enable GPIO failed\n");  in bd9576_wdt_probe()
228 	priv->gpiod_ping = devm_fwnode_gpiod_get(dev, dev_fwnode(dev->parent),  in bd9576_wdt_probe()
229 						 "rohm,watchdog-ping",  in bd9576_wdt_probe()
231 						 "watchdog-ping");  in bd9576_wdt_probe()
232 	if (IS_ERR(priv->gpiod_ping))  in bd9576_wdt_probe()
233 		return dev_err_probe(dev, PTR_ERR(priv->gpiod_ping),  in bd9576_wdt_probe()
234 				     "getting watchdog-ping GPIO failed\n");  in bd9576_wdt_probe()
236 	count = device_property_count_u32(dev->parent, "rohm,hw-timeout-ms");  in bd9576_wdt_probe()
237 	if (count < 0 && count != -EINVAL)  in bd9576_wdt_probe()
242 			return -EINVAL;  in bd9576_wdt_probe()
244 		ret = device_property_read_u32_array(dev->parent,  in bd9576_wdt_probe()
245 						     "rohm,hw-timeout-ms",  in bd9576_wdt_probe()
263 	watchdog_set_drvdata(&priv->wdd, priv);  in bd9576_wdt_probe()
265 	priv->wdd.info			= &bd957x_wdt_ident;  in bd9576_wdt_probe()
266 	priv->wdd.ops			= &bd957x_wdt_ops;  in bd9576_wdt_probe()
267 	priv->wdd.min_hw_heartbeat_ms	= hw_margin_min;  in bd9576_wdt_probe()
268 	priv->wdd.max_hw_heartbeat_ms	= hw_margin_max;  in bd9576_wdt_probe()
269 	priv->wdd.parent		= dev;  in bd9576_wdt_probe()
270 	priv->wdd.timeout		= WATCHDOG_TIMEOUT;  in bd9576_wdt_probe()
272 	watchdog_init_timeout(&priv->wdd, 0, dev);  in bd9576_wdt_probe()
273 	watchdog_set_nowayout(&priv->wdd, nowayout);  in bd9576_wdt_probe()
275 	watchdog_stop_on_reboot(&priv->wdd);  in bd9576_wdt_probe()
277 	return devm_watchdog_register_device(dev, &priv->wdd);  in bd9576_wdt_probe()
282 		.name = "bd9576-wdt",
292 MODULE_ALIAS("platform:bd9576-wdt");