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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
4 *
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/init.h>
13#include <linux/types.h>
14#include <linux/dmi.h>
15#include <linux/delay.h>
16#ifdef CONFIG_ACPI_PROCFS_POWER
17#include <linux/proc_fs.h>
18#include <linux/seq_file.h>
19#endif
20#include <linux/platform_device.h>
21#include <linux/power_supply.h>
22#include <linux/acpi.h>
23#include <acpi/battery.h>
24
25#define PREFIX "ACPI: "
26
27#define ACPI_AC_CLASS "ac_adapter"
28#define ACPI_AC_DEVICE_NAME "AC Adapter"
29#define ACPI_AC_FILE_STATE "state"
30#define ACPI_AC_NOTIFY_STATUS 0x80
31#define ACPI_AC_STATUS_OFFLINE 0x00
32#define ACPI_AC_STATUS_ONLINE 0x01
33#define ACPI_AC_STATUS_UNKNOWN 0xFF
34
35#define _COMPONENT ACPI_AC_COMPONENT
36ACPI_MODULE_NAME("ac");
37
38MODULE_AUTHOR("Paul Diefenbaugh");
39MODULE_DESCRIPTION("ACPI AC Adapter Driver");
40MODULE_LICENSE("GPL");
41
42
43static int acpi_ac_add(struct acpi_device *device);
44static int acpi_ac_remove(struct acpi_device *device);
45static void acpi_ac_notify(struct acpi_device *device, u32 event);
46
47struct acpi_ac_bl {
48 const char *hid;
49 int hrv;
50};
51
52static const struct acpi_device_id ac_device_ids[] = {
53 {"ACPI0003", 0},
54 {"", 0},
55};
56MODULE_DEVICE_TABLE(acpi, ac_device_ids);
57
58/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
59static const struct acpi_ac_bl acpi_ac_blacklist[] = {
60 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
61 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
62};
63
64#ifdef CONFIG_PM_SLEEP
65static int acpi_ac_resume(struct device *dev);
66#endif
67static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
68
69#ifdef CONFIG_ACPI_PROCFS_POWER
70extern struct proc_dir_entry *acpi_lock_ac_dir(void);
71extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
72#endif
73
74
75static int ac_sleep_before_get_state_ms;
76static int ac_check_pmic = 1;
77
78static struct acpi_driver acpi_ac_driver = {
79 .name = "ac",
80 .class = ACPI_AC_CLASS,
81 .ids = ac_device_ids,
82 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
83 .ops = {
84 .add = acpi_ac_add,
85 .remove = acpi_ac_remove,
86 .notify = acpi_ac_notify,
87 },
88 .drv.pm = &acpi_ac_pm,
89};
90
91struct acpi_ac {
92 struct power_supply *charger;
93 struct power_supply_desc charger_desc;
94 struct acpi_device * device;
95 unsigned long long state;
96 struct notifier_block battery_nb;
97};
98
99#define to_acpi_ac(x) power_supply_get_drvdata(x)
100
101/* --------------------------------------------------------------------------
102 AC Adapter Management
103 -------------------------------------------------------------------------- */
104
105static int acpi_ac_get_state(struct acpi_ac *ac)
106{
107 acpi_status status = AE_OK;
108
109 if (!ac)
110 return -EINVAL;
111
112 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
113 &ac->state);
114 if (ACPI_FAILURE(status)) {
115 ACPI_EXCEPTION((AE_INFO, status,
116 "Error reading AC Adapter state"));
117 ac->state = ACPI_AC_STATUS_UNKNOWN;
118 return -ENODEV;
119 }
120
121 return 0;
122}
123
124/* --------------------------------------------------------------------------
125 sysfs I/F
126 -------------------------------------------------------------------------- */
127static int get_ac_property(struct power_supply *psy,
128 enum power_supply_property psp,
129 union power_supply_propval *val)
130{
131 struct acpi_ac *ac = to_acpi_ac(psy);
132
133 if (!ac)
134 return -ENODEV;
135
136 if (acpi_ac_get_state(ac))
137 return -ENODEV;
138
139 switch (psp) {
140 case POWER_SUPPLY_PROP_ONLINE:
141 val->intval = ac->state;
142 break;
143 default:
144 return -EINVAL;
145 }
146 return 0;
147}
148
149static enum power_supply_property ac_props[] = {
150 POWER_SUPPLY_PROP_ONLINE,
151};
152
153#ifdef CONFIG_ACPI_PROCFS_POWER
154/* --------------------------------------------------------------------------
155 FS Interface (/proc)
156 -------------------------------------------------------------------------- */
157
158static struct proc_dir_entry *acpi_ac_dir;
159
160static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
161{
162 struct acpi_ac *ac = seq->private;
163
164
165 if (!ac)
166 return 0;
167
168 if (acpi_ac_get_state(ac)) {
169 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
170 return 0;
171 }
172
173 seq_puts(seq, "state: ");
174 switch (ac->state) {
175 case ACPI_AC_STATUS_OFFLINE:
176 seq_puts(seq, "off-line\n");
177 break;
178 case ACPI_AC_STATUS_ONLINE:
179 seq_puts(seq, "on-line\n");
180 break;
181 default:
182 seq_puts(seq, "unknown\n");
183 break;
184 }
185
186 return 0;
187}
188
189static int acpi_ac_add_fs(struct acpi_ac *ac)
190{
191 struct proc_dir_entry *entry = NULL;
192
193 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
194 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
195 if (!acpi_device_dir(ac->device)) {
196 acpi_device_dir(ac->device) =
197 proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
198 if (!acpi_device_dir(ac->device))
199 return -ENODEV;
200 }
201
202 /* 'state' [R] */
203 entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO,
204 acpi_device_dir(ac->device), acpi_ac_seq_show, ac);
205 if (!entry)
206 return -ENODEV;
207 return 0;
208}
209
210static int acpi_ac_remove_fs(struct acpi_ac *ac)
211{
212
213 if (acpi_device_dir(ac->device)) {
214 remove_proc_entry(ACPI_AC_FILE_STATE,
215 acpi_device_dir(ac->device));
216 remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
217 acpi_device_dir(ac->device) = NULL;
218 }
219
220 return 0;
221}
222#endif
223
224/* --------------------------------------------------------------------------
225 Driver Model
226 -------------------------------------------------------------------------- */
227
228static void acpi_ac_notify(struct acpi_device *device, u32 event)
229{
230 struct acpi_ac *ac = acpi_driver_data(device);
231
232 if (!ac)
233 return;
234
235 switch (event) {
236 default:
237 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
238 "Unsupported event [0x%x]\n", event));
239 /* fall through */
240 case ACPI_AC_NOTIFY_STATUS:
241 case ACPI_NOTIFY_BUS_CHECK:
242 case ACPI_NOTIFY_DEVICE_CHECK:
243 /*
244 * A buggy BIOS may notify AC first and then sleep for
245 * a specific time before doing actual operations in the
246 * EC event handler (_Qxx). This will cause the AC state
247 * reported by the ACPI event to be incorrect, so wait for a
248 * specific time for the EC event handler to make progress.
249 */
250 if (ac_sleep_before_get_state_ms > 0)
251 msleep(ac_sleep_before_get_state_ms);
252
253 acpi_ac_get_state(ac);
254 acpi_bus_generate_netlink_event(device->pnp.device_class,
255 dev_name(&device->dev), event,
256 (u32) ac->state);
257 acpi_notifier_call_chain(device, event, (u32) ac->state);
258 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
259 }
260
261 return;
262}
263
264static int acpi_ac_battery_notify(struct notifier_block *nb,
265 unsigned long action, void *data)
266{
267 struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
268 struct acpi_bus_event *event = (struct acpi_bus_event *)data;
269
270 /*
271 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
272 * when adapter is plugged/unplugged. However, battery status
273 * notifcations are triggered when battery starts charging or
274 * discharging. Re-reading AC status triggers lost AC notifications,
275 * if AC status has changed.
276 */
277 if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
278 event->type == ACPI_BATTERY_NOTIFY_STATUS)
279 acpi_ac_get_state(ac);
280
281 return NOTIFY_OK;
282}
283
284static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
285{
286 ac_sleep_before_get_state_ms = 1000;
287 return 0;
288}
289
290static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
291{
292 ac_check_pmic = 0;
293 return 0;
294}
295
296static const struct dmi_system_id ac_dmi_table[] __initconst = {
297 {
298 /* Thinkpad e530 */
299 .callback = thinkpad_e530_quirk,
300 .matches = {
301 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
302 DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
303 },
304 },
305 {
306 /* ECS EF20EA */
307 .callback = ac_do_not_check_pmic_quirk,
308 .matches = {
309 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
310 },
311 },
312 {
313 /* Lenovo Ideapad Miix 320 */
314 .callback = ac_do_not_check_pmic_quirk,
315 .matches = {
316 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
317 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
318 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
319 },
320 },
321 {},
322};
323
324static int acpi_ac_add(struct acpi_device *device)
325{
326 struct power_supply_config psy_cfg = {};
327 int result = 0;
328 struct acpi_ac *ac = NULL;
329
330
331 if (!device)
332 return -EINVAL;
333
334 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
335 if (!ac)
336 return -ENOMEM;
337
338 ac->device = device;
339 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
340 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
341 device->driver_data = ac;
342
343 result = acpi_ac_get_state(ac);
344 if (result)
345 goto end;
346
347 psy_cfg.drv_data = ac;
348
349 ac->charger_desc.name = acpi_device_bid(device);
350#ifdef CONFIG_ACPI_PROCFS_POWER
351 result = acpi_ac_add_fs(ac);
352 if (result)
353 goto end;
354#endif
355 ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
356 ac->charger_desc.properties = ac_props;
357 ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
358 ac->charger_desc.get_property = get_ac_property;
359 ac->charger = power_supply_register(&ac->device->dev,
360 &ac->charger_desc, &psy_cfg);
361 if (IS_ERR(ac->charger)) {
362 result = PTR_ERR(ac->charger);
363 goto end;
364 }
365
366 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
367 acpi_device_name(device), acpi_device_bid(device),
368 ac->state ? "on-line" : "off-line");
369
370 ac->battery_nb.notifier_call = acpi_ac_battery_notify;
371 register_acpi_notifier(&ac->battery_nb);
372end:
373 if (result) {
374#ifdef CONFIG_ACPI_PROCFS_POWER
375 acpi_ac_remove_fs(ac);
376#endif
377 kfree(ac);
378 }
379
380 return result;
381}
382
383#ifdef CONFIG_PM_SLEEP
384static int acpi_ac_resume(struct device *dev)
385{
386 struct acpi_ac *ac;
387 unsigned old_state;
388
389 if (!dev)
390 return -EINVAL;
391
392 ac = acpi_driver_data(to_acpi_device(dev));
393 if (!ac)
394 return -EINVAL;
395
396 old_state = ac->state;
397 if (acpi_ac_get_state(ac))
398 return 0;
399 if (old_state != ac->state)
400 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
401 return 0;
402}
403#else
404#define acpi_ac_resume NULL
405#endif
406
407static int acpi_ac_remove(struct acpi_device *device)
408{
409 struct acpi_ac *ac = NULL;
410
411
412 if (!device || !acpi_driver_data(device))
413 return -EINVAL;
414
415 ac = acpi_driver_data(device);
416
417 power_supply_unregister(ac->charger);
418 unregister_acpi_notifier(&ac->battery_nb);
419
420#ifdef CONFIG_ACPI_PROCFS_POWER
421 acpi_ac_remove_fs(ac);
422#endif
423
424 kfree(ac);
425
426 return 0;
427}
428
429static int __init acpi_ac_init(void)
430{
431 unsigned int i;
432 int result;
433
434 if (acpi_disabled)
435 return -ENODEV;
436
437 dmi_check_system(ac_dmi_table);
438
439 if (ac_check_pmic) {
440 for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
441 if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
442 acpi_ac_blacklist[i].hrv)) {
443 pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
444 acpi_ac_blacklist[i].hid);
445 return -ENODEV;
446 }
447 }
448
449#ifdef CONFIG_ACPI_PROCFS_POWER
450 acpi_ac_dir = acpi_lock_ac_dir();
451 if (!acpi_ac_dir)
452 return -ENODEV;
453#endif
454
455
456 result = acpi_bus_register_driver(&acpi_ac_driver);
457 if (result < 0) {
458#ifdef CONFIG_ACPI_PROCFS_POWER
459 acpi_unlock_ac_dir(acpi_ac_dir);
460#endif
461 return -ENODEV;
462 }
463
464 return 0;
465}
466
467static void __exit acpi_ac_exit(void)
468{
469 acpi_bus_unregister_driver(&acpi_ac_driver);
470#ifdef CONFIG_ACPI_PROCFS_POWER
471 acpi_unlock_ac_dir(acpi_ac_dir);
472#endif
473}
474module_init(acpi_ac_init);
475module_exit(acpi_ac_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * acpi_ac.c - ACPI AC Adapter Driver (Revision: 27)
4 *
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 */
8
9#define pr_fmt(fmt) "ACPI: AC: " fmt
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/init.h>
15#include <linux/types.h>
16#include <linux/dmi.h>
17#include <linux/delay.h>
18#include <linux/platform_device.h>
19#include <linux/power_supply.h>
20#include <linux/acpi.h>
21#include <acpi/battery.h>
22
23#define ACPI_AC_CLASS "ac_adapter"
24#define ACPI_AC_DEVICE_NAME "AC Adapter"
25#define ACPI_AC_FILE_STATE "state"
26#define ACPI_AC_NOTIFY_STATUS 0x80
27#define ACPI_AC_STATUS_OFFLINE 0x00
28#define ACPI_AC_STATUS_ONLINE 0x01
29#define ACPI_AC_STATUS_UNKNOWN 0xFF
30
31MODULE_AUTHOR("Paul Diefenbaugh");
32MODULE_DESCRIPTION("ACPI AC Adapter Driver");
33MODULE_LICENSE("GPL");
34
35static int acpi_ac_add(struct acpi_device *device);
36static void acpi_ac_remove(struct acpi_device *device);
37static void acpi_ac_notify(struct acpi_device *device, u32 event);
38
39static const struct acpi_device_id ac_device_ids[] = {
40 {"ACPI0003", 0},
41 {"", 0},
42};
43MODULE_DEVICE_TABLE(acpi, ac_device_ids);
44
45#ifdef CONFIG_PM_SLEEP
46static int acpi_ac_resume(struct device *dev);
47#endif
48static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
49
50static int ac_sleep_before_get_state_ms;
51static int ac_only;
52
53static struct acpi_driver acpi_ac_driver = {
54 .name = "ac",
55 .class = ACPI_AC_CLASS,
56 .ids = ac_device_ids,
57 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
58 .ops = {
59 .add = acpi_ac_add,
60 .remove = acpi_ac_remove,
61 .notify = acpi_ac_notify,
62 },
63 .drv.pm = &acpi_ac_pm,
64};
65
66struct acpi_ac {
67 struct power_supply *charger;
68 struct power_supply_desc charger_desc;
69 struct acpi_device *device;
70 unsigned long long state;
71 struct notifier_block battery_nb;
72};
73
74#define to_acpi_ac(x) power_supply_get_drvdata(x)
75
76/* AC Adapter Management */
77static int acpi_ac_get_state(struct acpi_ac *ac)
78{
79 acpi_status status = AE_OK;
80
81 if (!ac)
82 return -EINVAL;
83
84 if (ac_only) {
85 ac->state = 1;
86 return 0;
87 }
88
89 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
90 &ac->state);
91 if (ACPI_FAILURE(status)) {
92 acpi_handle_info(ac->device->handle,
93 "Error reading AC Adapter state: %s\n",
94 acpi_format_exception(status));
95 ac->state = ACPI_AC_STATUS_UNKNOWN;
96 return -ENODEV;
97 }
98
99 return 0;
100}
101
102/* sysfs I/F */
103static int get_ac_property(struct power_supply *psy,
104 enum power_supply_property psp,
105 union power_supply_propval *val)
106{
107 struct acpi_ac *ac = to_acpi_ac(psy);
108
109 if (!ac)
110 return -ENODEV;
111
112 if (acpi_ac_get_state(ac))
113 return -ENODEV;
114
115 switch (psp) {
116 case POWER_SUPPLY_PROP_ONLINE:
117 val->intval = ac->state;
118 break;
119 default:
120 return -EINVAL;
121 }
122
123 return 0;
124}
125
126static enum power_supply_property ac_props[] = {
127 POWER_SUPPLY_PROP_ONLINE,
128};
129
130/* Driver Model */
131static void acpi_ac_notify(struct acpi_device *device, u32 event)
132{
133 struct acpi_ac *ac = acpi_driver_data(device);
134
135 if (!ac)
136 return;
137
138 switch (event) {
139 default:
140 acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",
141 event);
142 fallthrough;
143 case ACPI_AC_NOTIFY_STATUS:
144 case ACPI_NOTIFY_BUS_CHECK:
145 case ACPI_NOTIFY_DEVICE_CHECK:
146 /*
147 * A buggy BIOS may notify AC first and then sleep for
148 * a specific time before doing actual operations in the
149 * EC event handler (_Qxx). This will cause the AC state
150 * reported by the ACPI event to be incorrect, so wait for a
151 * specific time for the EC event handler to make progress.
152 */
153 if (ac_sleep_before_get_state_ms > 0)
154 msleep(ac_sleep_before_get_state_ms);
155
156 acpi_ac_get_state(ac);
157 acpi_bus_generate_netlink_event(device->pnp.device_class,
158 dev_name(&device->dev), event,
159 (u32) ac->state);
160 acpi_notifier_call_chain(device, event, (u32) ac->state);
161 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
162 }
163}
164
165static int acpi_ac_battery_notify(struct notifier_block *nb,
166 unsigned long action, void *data)
167{
168 struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
169 struct acpi_bus_event *event = (struct acpi_bus_event *)data;
170
171 /*
172 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
173 * when adapter is plugged/unplugged. However, battery status
174 * notifications are triggered when battery starts charging or
175 * discharging. Re-reading AC status triggers lost AC notifications,
176 * if AC status has changed.
177 */
178 if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
179 event->type == ACPI_BATTERY_NOTIFY_STATUS)
180 acpi_ac_get_state(ac);
181
182 return NOTIFY_OK;
183}
184
185static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
186{
187 ac_sleep_before_get_state_ms = 1000;
188 return 0;
189}
190
191static int __init ac_only_quirk(const struct dmi_system_id *d)
192{
193 ac_only = 1;
194 return 0;
195}
196
197/* Please keep this list alphabetically sorted */
198static const struct dmi_system_id ac_dmi_table[] __initconst = {
199 {
200 /* Kodlix GK45 returning incorrect state */
201 .callback = ac_only_quirk,
202 .matches = {
203 DMI_MATCH(DMI_PRODUCT_NAME, "GK45"),
204 },
205 },
206 {
207 /* Lenovo Thinkpad e530, see comment in acpi_ac_notify() */
208 .callback = thinkpad_e530_quirk,
209 .matches = {
210 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
211 DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
212 },
213 },
214 {},
215};
216
217static int acpi_ac_add(struct acpi_device *device)
218{
219 struct power_supply_config psy_cfg = {};
220 int result = 0;
221 struct acpi_ac *ac = NULL;
222
223
224 if (!device)
225 return -EINVAL;
226
227 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
228 if (!ac)
229 return -ENOMEM;
230
231 ac->device = device;
232 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
233 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
234 device->driver_data = ac;
235
236 result = acpi_ac_get_state(ac);
237 if (result)
238 goto end;
239
240 psy_cfg.drv_data = ac;
241
242 ac->charger_desc.name = acpi_device_bid(device);
243 ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
244 ac->charger_desc.properties = ac_props;
245 ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
246 ac->charger_desc.get_property = get_ac_property;
247 ac->charger = power_supply_register(&ac->device->dev,
248 &ac->charger_desc, &psy_cfg);
249 if (IS_ERR(ac->charger)) {
250 result = PTR_ERR(ac->charger);
251 goto end;
252 }
253
254 pr_info("%s [%s] (%s)\n", acpi_device_name(device),
255 acpi_device_bid(device), ac->state ? "on-line" : "off-line");
256
257 ac->battery_nb.notifier_call = acpi_ac_battery_notify;
258 register_acpi_notifier(&ac->battery_nb);
259end:
260 if (result)
261 kfree(ac);
262
263 return result;
264}
265
266#ifdef CONFIG_PM_SLEEP
267static int acpi_ac_resume(struct device *dev)
268{
269 struct acpi_ac *ac;
270 unsigned int old_state;
271
272 if (!dev)
273 return -EINVAL;
274
275 ac = acpi_driver_data(to_acpi_device(dev));
276 if (!ac)
277 return -EINVAL;
278
279 old_state = ac->state;
280 if (acpi_ac_get_state(ac))
281 return 0;
282 if (old_state != ac->state)
283 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
284
285 return 0;
286}
287#else
288#define acpi_ac_resume NULL
289#endif
290
291static void acpi_ac_remove(struct acpi_device *device)
292{
293 struct acpi_ac *ac = NULL;
294
295 if (!device || !acpi_driver_data(device))
296 return;
297
298 ac = acpi_driver_data(device);
299
300 power_supply_unregister(ac->charger);
301 unregister_acpi_notifier(&ac->battery_nb);
302
303 kfree(ac);
304}
305
306static int __init acpi_ac_init(void)
307{
308 int result;
309
310 if (acpi_disabled)
311 return -ENODEV;
312
313 if (acpi_quirk_skip_acpi_ac_and_battery())
314 return -ENODEV;
315
316 dmi_check_system(ac_dmi_table);
317
318 result = acpi_bus_register_driver(&acpi_ac_driver);
319 if (result < 0)
320 return -ENODEV;
321
322 return 0;
323}
324
325static void __exit acpi_ac_exit(void)
326{
327 acpi_bus_unregister_driver(&acpi_ac_driver);
328}
329module_init(acpi_ac_init);
330module_exit(acpi_ac_exit);