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");
70 	.name = "ac",
93                                AC Adapter Management
96 static int acpi_ac_get_state(struct acpi_ac *ac)  in acpi_ac_get_state()  argument
100 	if (!ac)  in acpi_ac_get_state()
104 		ac->state = 1;  in acpi_ac_get_state()
108 	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,  in acpi_ac_get_state()
109 				       &ac->state);  in acpi_ac_get_state()
112 				"Error reading AC Adapter state"));  in acpi_ac_get_state()
113 		ac->state = ACPI_AC_STATUS_UNKNOWN;  in acpi_ac_get_state()
127 	struct acpi_ac *ac = to_acpi_ac(psy);  in get_ac_property()  local
129 	if (!ac)  in get_ac_property()
132 	if (acpi_ac_get_state(ac))  in get_ac_property()
137 		val->intval = ac->state;  in get_ac_property()
155 	struct acpi_ac *ac = acpi_driver_data(device);  in acpi_ac_notify()  local
157 	if (!ac)  in acpi_ac_notify()
169 		 * A buggy BIOS may notify AC first and then sleep for  in acpi_ac_notify()
171 		 * EC event handler (_Qxx). This will cause the AC state  in acpi_ac_notify()
178 		acpi_ac_get_state(ac);  in acpi_ac_notify()
181 						  (u32) ac->state);  in acpi_ac_notify()
182 		acpi_notifier_call_chain(device, event, (u32) ac->state);  in acpi_ac_notify()
183 		kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);  in acpi_ac_notify()
192 	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);  in acpi_ac_battery_notify()  local
196 	 * On HP Pavilion dv6-6179er AC status notifications aren't triggered  in acpi_ac_battery_notify()
199 	 * discharging. Re-reading AC status triggers lost AC notifications,  in acpi_ac_battery_notify()
200 	 * if AC status has changed.  in acpi_ac_battery_notify()
204 		acpi_ac_get_state(ac);  in acpi_ac_battery_notify()
267 	struct acpi_ac *ac = NULL;  in acpi_ac_add()  local
273 	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);  in acpi_ac_add()
274 	if (!ac)  in acpi_ac_add()
277 	ac->device = device;  in acpi_ac_add()
280 	device->driver_data = ac;  in acpi_ac_add()
282 	result = acpi_ac_get_state(ac);  in acpi_ac_add()
286 	psy_cfg.drv_data = ac;  in acpi_ac_add()
288 	ac->charger_desc.name = acpi_device_bid(device);  in acpi_ac_add()
289 	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;  in acpi_ac_add()
290 	ac->charger_desc.properties = ac_props;  in acpi_ac_add()
291 	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);  in acpi_ac_add()
292 	ac->charger_desc.get_property = get_ac_property;  in acpi_ac_add()
293 	ac->charger = power_supply_register(&ac->device->dev,  in acpi_ac_add()
294 					    &ac->charger_desc, &psy_cfg);  in acpi_ac_add()
295 	if (IS_ERR(ac->charger)) {  in acpi_ac_add()
296 		result = PTR_ERR(ac->charger);  in acpi_ac_add()
302 	       ac->state ? "on-line" : "off-line");  in acpi_ac_add()
304 	ac->battery_nb.notifier_call = acpi_ac_battery_notify;  in acpi_ac_add()
305 	register_acpi_notifier(&ac->battery_nb);  in acpi_ac_add()
308 		kfree(ac);  in acpi_ac_add()
317 	struct acpi_ac *ac;  in acpi_ac_resume()  local
323 	ac = acpi_driver_data(to_acpi_device(dev));  in acpi_ac_resume()
324 	if (!ac)  in acpi_ac_resume()
327 	old_state = ac->state;  in acpi_ac_resume()
328 	if (acpi_ac_get_state(ac))  in acpi_ac_resume()
330 	if (old_state != ac->state)  in acpi_ac_resume()
331 		kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);  in acpi_ac_resume()
340 	struct acpi_ac *ac = NULL;  in acpi_ac_remove()  local
346 	ac = acpi_driver_data(device);  in acpi_ac_remove()
348 	power_supply_unregister(ac->charger);  in acpi_ac_remove()
349 	unregister_acpi_notifier(&ac->battery_nb);  in acpi_ac_remove()
351 	kfree(ac);  in acpi_ac_remove()
370 				pr_info(PREFIX "AC: found native %s PMIC, not loading\n",  in acpi_ac_init()