3  *  acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
24 #define ACPI_AC_DEVICE_NAME		"AC Adapter"
32 ACPI_MODULE_NAME("ac");
35 MODULE_DESCRIPTION("ACPI AC Adapter Driver");
69 	.name = "ac",
92                                AC Adapter Management
95 static int acpi_ac_get_state(struct acpi_ac *ac)  in acpi_ac_get_state()  argument
99 	if (!ac)  in acpi_ac_get_state()
102 	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,  in acpi_ac_get_state()
103 				       &ac->state);  in acpi_ac_get_state()
106 				"Error reading AC Adapter state"));  in acpi_ac_get_state()
107 		ac->state = ACPI_AC_STATUS_UNKNOWN;  in acpi_ac_get_state()
121 	struct acpi_ac *ac = to_acpi_ac(psy);  in get_ac_property()  local
123 	if (!ac)  in get_ac_property()
126 	if (acpi_ac_get_state(ac))  in get_ac_property()
131 		val->intval = ac->state;  in get_ac_property()
149 	struct acpi_ac *ac = acpi_driver_data(device);  in acpi_ac_notify()  local
151 	if (!ac)  in acpi_ac_notify()
163 		 * A buggy BIOS may notify AC first and then sleep for  in acpi_ac_notify()
165 		 * EC event handler (_Qxx). This will cause the AC state  in acpi_ac_notify()
172 		acpi_ac_get_state(ac);  in acpi_ac_notify()
175 						  (u32) ac->state);  in acpi_ac_notify()
176 		acpi_notifier_call_chain(device, event, (u32) ac->state);  in acpi_ac_notify()
177 		kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);  in acpi_ac_notify()
186 	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);  in acpi_ac_battery_notify()  local
190 	 * On HP Pavilion dv6-6179er AC status notifications aren't triggered  in acpi_ac_battery_notify()
193 	 * discharging. Re-reading AC status triggers lost AC notifications,  in acpi_ac_battery_notify()
194 	 * if AC status has changed.  in acpi_ac_battery_notify()
198 		acpi_ac_get_state(ac);  in acpi_ac_battery_notify()
248 	struct acpi_ac *ac = NULL;  in acpi_ac_add()  local
254 	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);  in acpi_ac_add()
255 	if (!ac)  in acpi_ac_add()
258 	ac->device = device;  in acpi_ac_add()
261 	device->driver_data = ac;  in acpi_ac_add()
263 	result = acpi_ac_get_state(ac);  in acpi_ac_add()
267 	psy_cfg.drv_data = ac;  in acpi_ac_add()
269 	ac->charger_desc.name = acpi_device_bid(device);  in acpi_ac_add()
270 	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;  in acpi_ac_add()
271 	ac->charger_desc.properties = ac_props;  in acpi_ac_add()
272 	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);  in acpi_ac_add()
273 	ac->charger_desc.get_property = get_ac_property;  in acpi_ac_add()
274 	ac->charger = power_supply_register(&ac->device->dev,  in acpi_ac_add()
275 					    &ac->charger_desc, &psy_cfg);  in acpi_ac_add()
276 	if (IS_ERR(ac->charger)) {  in acpi_ac_add()
277 		result = PTR_ERR(ac->charger);  in acpi_ac_add()
283 	       ac->state ? "on-line" : "off-line");  in acpi_ac_add()
285 	ac->battery_nb.notifier_call = acpi_ac_battery_notify;  in acpi_ac_add()
286 	register_acpi_notifier(&ac->battery_nb);  in acpi_ac_add()
289 		kfree(ac);  in acpi_ac_add()
298 	struct acpi_ac *ac;  in acpi_ac_resume()  local
304 	ac = acpi_driver_data(to_acpi_device(dev));  in acpi_ac_resume()
305 	if (!ac)  in acpi_ac_resume()
308 	old_state = ac->state;  in acpi_ac_resume()
309 	if (acpi_ac_get_state(ac))  in acpi_ac_resume()
311 	if (old_state != ac->state)  in acpi_ac_resume()
312 		kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);  in acpi_ac_resume()
321 	struct acpi_ac *ac = NULL;  in acpi_ac_remove()  local
327 	ac = acpi_driver_data(device);  in acpi_ac_remove()
329 	power_supply_unregister(ac->charger);  in acpi_ac_remove()
330 	unregister_acpi_notifier(&ac->battery_nb);  in acpi_ac_remove()
332 	kfree(ac);  in acpi_ac_remove()
351 				pr_info(PREFIX "AC: found native %s PMIC, not loading\n",  in acpi_ac_init()