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1/*
2 * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/slab.h>
29#include <linux/init.h>
30#include <linux/types.h>
31#ifdef CONFIG_ACPI_PROCFS_POWER
32#include <linux/proc_fs.h>
33#include <linux/seq_file.h>
34#endif
35#include <linux/power_supply.h>
36#include <acpi/acpi_bus.h>
37#include <acpi/acpi_drivers.h>
38
39#define PREFIX "ACPI: "
40
41#define ACPI_AC_CLASS "ac_adapter"
42#define ACPI_AC_DEVICE_NAME "AC Adapter"
43#define ACPI_AC_FILE_STATE "state"
44#define ACPI_AC_NOTIFY_STATUS 0x80
45#define ACPI_AC_STATUS_OFFLINE 0x00
46#define ACPI_AC_STATUS_ONLINE 0x01
47#define ACPI_AC_STATUS_UNKNOWN 0xFF
48
49#define _COMPONENT ACPI_AC_COMPONENT
50ACPI_MODULE_NAME("ac");
51
52MODULE_AUTHOR("Paul Diefenbaugh");
53MODULE_DESCRIPTION("ACPI AC Adapter Driver");
54MODULE_LICENSE("GPL");
55
56#ifdef CONFIG_ACPI_PROCFS_POWER
57extern struct proc_dir_entry *acpi_lock_ac_dir(void);
58extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
59static int acpi_ac_open_fs(struct inode *inode, struct file *file);
60#endif
61
62static int acpi_ac_add(struct acpi_device *device);
63static int acpi_ac_remove(struct acpi_device *device, int type);
64static int acpi_ac_resume(struct acpi_device *device);
65static void acpi_ac_notify(struct acpi_device *device, u32 event);
66
67static const struct acpi_device_id ac_device_ids[] = {
68 {"ACPI0003", 0},
69 {"", 0},
70};
71MODULE_DEVICE_TABLE(acpi, ac_device_ids);
72
73static struct acpi_driver acpi_ac_driver = {
74 .name = "ac",
75 .class = ACPI_AC_CLASS,
76 .ids = ac_device_ids,
77 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
78 .ops = {
79 .add = acpi_ac_add,
80 .remove = acpi_ac_remove,
81 .resume = acpi_ac_resume,
82 .notify = acpi_ac_notify,
83 },
84};
85
86struct acpi_ac {
87 struct power_supply charger;
88 struct acpi_device * device;
89 unsigned long long state;
90};
91
92#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
93
94#ifdef CONFIG_ACPI_PROCFS_POWER
95static const struct file_operations acpi_ac_fops = {
96 .owner = THIS_MODULE,
97 .open = acpi_ac_open_fs,
98 .read = seq_read,
99 .llseek = seq_lseek,
100 .release = single_release,
101};
102#endif
103
104/* --------------------------------------------------------------------------
105 AC Adapter Management
106 -------------------------------------------------------------------------- */
107
108static int acpi_ac_get_state(struct acpi_ac *ac)
109{
110 acpi_status status = AE_OK;
111
112
113 if (!ac)
114 return -EINVAL;
115
116 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
117 if (ACPI_FAILURE(status)) {
118 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
119 ac->state = ACPI_AC_STATUS_UNKNOWN;
120 return -ENODEV;
121 }
122
123 return 0;
124}
125
126/* --------------------------------------------------------------------------
127 sysfs I/F
128 -------------------------------------------------------------------------- */
129static int get_ac_property(struct power_supply *psy,
130 enum power_supply_property psp,
131 union power_supply_propval *val)
132{
133 struct acpi_ac *ac = to_acpi_ac(psy);
134
135 if (!ac)
136 return -ENODEV;
137
138 if (acpi_ac_get_state(ac))
139 return -ENODEV;
140
141 switch (psp) {
142 case POWER_SUPPLY_PROP_ONLINE:
143 val->intval = ac->state;
144 break;
145 default:
146 return -EINVAL;
147 }
148 return 0;
149}
150
151static enum power_supply_property ac_props[] = {
152 POWER_SUPPLY_PROP_ONLINE,
153};
154
155#ifdef CONFIG_ACPI_PROCFS_POWER
156/* --------------------------------------------------------------------------
157 FS Interface (/proc)
158 -------------------------------------------------------------------------- */
159
160static struct proc_dir_entry *acpi_ac_dir;
161
162static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
163{
164 struct acpi_ac *ac = seq->private;
165
166
167 if (!ac)
168 return 0;
169
170 if (acpi_ac_get_state(ac)) {
171 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
172 return 0;
173 }
174
175 seq_puts(seq, "state: ");
176 switch (ac->state) {
177 case ACPI_AC_STATUS_OFFLINE:
178 seq_puts(seq, "off-line\n");
179 break;
180 case ACPI_AC_STATUS_ONLINE:
181 seq_puts(seq, "on-line\n");
182 break;
183 default:
184 seq_puts(seq, "unknown\n");
185 break;
186 }
187
188 return 0;
189}
190
191static int acpi_ac_open_fs(struct inode *inode, struct file *file)
192{
193 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
194}
195
196static int acpi_ac_add_fs(struct acpi_device *device)
197{
198 struct proc_dir_entry *entry = NULL;
199
200 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
201 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
202 if (!acpi_device_dir(device)) {
203 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
204 acpi_ac_dir);
205 if (!acpi_device_dir(device))
206 return -ENODEV;
207 }
208
209 /* 'state' [R] */
210 entry = proc_create_data(ACPI_AC_FILE_STATE,
211 S_IRUGO, acpi_device_dir(device),
212 &acpi_ac_fops, acpi_driver_data(device));
213 if (!entry)
214 return -ENODEV;
215 return 0;
216}
217
218static int acpi_ac_remove_fs(struct acpi_device *device)
219{
220
221 if (acpi_device_dir(device)) {
222 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
223
224 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
225 acpi_device_dir(device) = NULL;
226 }
227
228 return 0;
229}
230#endif
231
232/* --------------------------------------------------------------------------
233 Driver Model
234 -------------------------------------------------------------------------- */
235
236static void acpi_ac_notify(struct acpi_device *device, u32 event)
237{
238 struct acpi_ac *ac = acpi_driver_data(device);
239
240
241 if (!ac)
242 return;
243
244 switch (event) {
245 default:
246 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
247 "Unsupported event [0x%x]\n", event));
248 case ACPI_AC_NOTIFY_STATUS:
249 case ACPI_NOTIFY_BUS_CHECK:
250 case ACPI_NOTIFY_DEVICE_CHECK:
251 acpi_ac_get_state(ac);
252 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
253 acpi_bus_generate_netlink_event(device->pnp.device_class,
254 dev_name(&device->dev), event,
255 (u32) ac->state);
256 acpi_notifier_call_chain(device, event, (u32) ac->state);
257 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
258 }
259
260 return;
261}
262
263static int acpi_ac_add(struct acpi_device *device)
264{
265 int result = 0;
266 struct acpi_ac *ac = NULL;
267
268
269 if (!device)
270 return -EINVAL;
271
272 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
273 if (!ac)
274 return -ENOMEM;
275
276 ac->device = device;
277 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
278 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
279 device->driver_data = ac;
280
281 result = acpi_ac_get_state(ac);
282 if (result)
283 goto end;
284
285#ifdef CONFIG_ACPI_PROCFS_POWER
286 result = acpi_ac_add_fs(device);
287#endif
288 if (result)
289 goto end;
290 ac->charger.name = acpi_device_bid(device);
291 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
292 ac->charger.properties = ac_props;
293 ac->charger.num_properties = ARRAY_SIZE(ac_props);
294 ac->charger.get_property = get_ac_property;
295 power_supply_register(&ac->device->dev, &ac->charger);
296
297 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
298 acpi_device_name(device), acpi_device_bid(device),
299 ac->state ? "on-line" : "off-line");
300
301 end:
302 if (result) {
303#ifdef CONFIG_ACPI_PROCFS_POWER
304 acpi_ac_remove_fs(device);
305#endif
306 kfree(ac);
307 }
308
309 return result;
310}
311
312static int acpi_ac_resume(struct acpi_device *device)
313{
314 struct acpi_ac *ac;
315 unsigned old_state;
316 if (!device || !acpi_driver_data(device))
317 return -EINVAL;
318 ac = acpi_driver_data(device);
319 old_state = ac->state;
320 if (acpi_ac_get_state(ac))
321 return 0;
322 if (old_state != ac->state)
323 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
324 return 0;
325}
326
327static int acpi_ac_remove(struct acpi_device *device, int type)
328{
329 struct acpi_ac *ac = NULL;
330
331
332 if (!device || !acpi_driver_data(device))
333 return -EINVAL;
334
335 ac = acpi_driver_data(device);
336
337 if (ac->charger.dev)
338 power_supply_unregister(&ac->charger);
339#ifdef CONFIG_ACPI_PROCFS_POWER
340 acpi_ac_remove_fs(device);
341#endif
342
343 kfree(ac);
344
345 return 0;
346}
347
348static int __init acpi_ac_init(void)
349{
350 int result;
351
352 if (acpi_disabled)
353 return -ENODEV;
354
355#ifdef CONFIG_ACPI_PROCFS_POWER
356 acpi_ac_dir = acpi_lock_ac_dir();
357 if (!acpi_ac_dir)
358 return -ENODEV;
359#endif
360
361 result = acpi_bus_register_driver(&acpi_ac_driver);
362 if (result < 0) {
363#ifdef CONFIG_ACPI_PROCFS_POWER
364 acpi_unlock_ac_dir(acpi_ac_dir);
365#endif
366 return -ENODEV;
367 }
368
369 return 0;
370}
371
372static void __exit acpi_ac_exit(void)
373{
374
375 acpi_bus_unregister_driver(&acpi_ac_driver);
376
377#ifdef CONFIG_ACPI_PROCFS_POWER
378 acpi_unlock_ac_dir(acpi_ac_dir);
379#endif
380
381 return;
382}
383
384module_init(acpi_ac_init);
385module_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#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#include <linux/platform_device.h>
17#include <linux/power_supply.h>
18#include <linux/acpi.h>
19#include <acpi/battery.h>
20
21#define PREFIX "ACPI: "
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
31#define _COMPONENT ACPI_AC_COMPONENT
32ACPI_MODULE_NAME("ac");
33
34MODULE_AUTHOR("Paul Diefenbaugh");
35MODULE_DESCRIPTION("ACPI AC Adapter Driver");
36MODULE_LICENSE("GPL");
37
38
39static int acpi_ac_add(struct acpi_device *device);
40static int acpi_ac_remove(struct acpi_device *device);
41static void acpi_ac_notify(struct acpi_device *device, u32 event);
42
43struct acpi_ac_bl {
44 const char *hid;
45 int hrv;
46};
47
48static const struct acpi_device_id ac_device_ids[] = {
49 {"ACPI0003", 0},
50 {"", 0},
51};
52MODULE_DEVICE_TABLE(acpi, ac_device_ids);
53
54/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
55static const struct acpi_ac_bl acpi_ac_blacklist[] = {
56 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
57 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
58};
59
60#ifdef CONFIG_PM_SLEEP
61static int acpi_ac_resume(struct device *dev);
62#endif
63static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
64
65static int ac_sleep_before_get_state_ms;
66static int ac_check_pmic = 1;
67
68static struct acpi_driver acpi_ac_driver = {
69 .name = "ac",
70 .class = ACPI_AC_CLASS,
71 .ids = ac_device_ids,
72 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
73 .ops = {
74 .add = acpi_ac_add,
75 .remove = acpi_ac_remove,
76 .notify = acpi_ac_notify,
77 },
78 .drv.pm = &acpi_ac_pm,
79};
80
81struct acpi_ac {
82 struct power_supply *charger;
83 struct power_supply_desc charger_desc;
84 struct acpi_device * device;
85 unsigned long long state;
86 struct notifier_block battery_nb;
87};
88
89#define to_acpi_ac(x) power_supply_get_drvdata(x)
90
91/* --------------------------------------------------------------------------
92 AC Adapter Management
93 -------------------------------------------------------------------------- */
94
95static int acpi_ac_get_state(struct acpi_ac *ac)
96{
97 acpi_status status = AE_OK;
98
99 if (!ac)
100 return -EINVAL;
101
102 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
103 &ac->state);
104 if (ACPI_FAILURE(status)) {
105 ACPI_EXCEPTION((AE_INFO, status,
106 "Error reading AC Adapter state"));
107 ac->state = ACPI_AC_STATUS_UNKNOWN;
108 return -ENODEV;
109 }
110
111 return 0;
112}
113
114/* --------------------------------------------------------------------------
115 sysfs I/F
116 -------------------------------------------------------------------------- */
117static int get_ac_property(struct power_supply *psy,
118 enum power_supply_property psp,
119 union power_supply_propval *val)
120{
121 struct acpi_ac *ac = to_acpi_ac(psy);
122
123 if (!ac)
124 return -ENODEV;
125
126 if (acpi_ac_get_state(ac))
127 return -ENODEV;
128
129 switch (psp) {
130 case POWER_SUPPLY_PROP_ONLINE:
131 val->intval = ac->state;
132 break;
133 default:
134 return -EINVAL;
135 }
136 return 0;
137}
138
139static enum power_supply_property ac_props[] = {
140 POWER_SUPPLY_PROP_ONLINE,
141};
142
143/* --------------------------------------------------------------------------
144 Driver Model
145 -------------------------------------------------------------------------- */
146
147static void acpi_ac_notify(struct acpi_device *device, u32 event)
148{
149 struct acpi_ac *ac = acpi_driver_data(device);
150
151 if (!ac)
152 return;
153
154 switch (event) {
155 default:
156 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
157 "Unsupported event [0x%x]\n", event));
158 fallthrough;
159 case ACPI_AC_NOTIFY_STATUS:
160 case ACPI_NOTIFY_BUS_CHECK:
161 case ACPI_NOTIFY_DEVICE_CHECK:
162 /*
163 * A buggy BIOS may notify AC first and then sleep for
164 * a specific time before doing actual operations in the
165 * EC event handler (_Qxx). This will cause the AC state
166 * reported by the ACPI event to be incorrect, so wait for a
167 * specific time for the EC event handler to make progress.
168 */
169 if (ac_sleep_before_get_state_ms > 0)
170 msleep(ac_sleep_before_get_state_ms);
171
172 acpi_ac_get_state(ac);
173 acpi_bus_generate_netlink_event(device->pnp.device_class,
174 dev_name(&device->dev), event,
175 (u32) ac->state);
176 acpi_notifier_call_chain(device, event, (u32) ac->state);
177 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
178 }
179
180 return;
181}
182
183static int acpi_ac_battery_notify(struct notifier_block *nb,
184 unsigned long action, void *data)
185{
186 struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
187 struct acpi_bus_event *event = (struct acpi_bus_event *)data;
188
189 /*
190 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
191 * when adapter is plugged/unplugged. However, battery status
192 * notifcations are triggered when battery starts charging or
193 * discharging. Re-reading AC status triggers lost AC notifications,
194 * if AC status has changed.
195 */
196 if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
197 event->type == ACPI_BATTERY_NOTIFY_STATUS)
198 acpi_ac_get_state(ac);
199
200 return NOTIFY_OK;
201}
202
203static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
204{
205 ac_sleep_before_get_state_ms = 1000;
206 return 0;
207}
208
209static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
210{
211 ac_check_pmic = 0;
212 return 0;
213}
214
215/* Please keep this list alphabetically sorted */
216static const struct dmi_system_id ac_dmi_table[] __initconst = {
217 {
218 /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
219 .callback = ac_do_not_check_pmic_quirk,
220 .matches = {
221 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
222 },
223 },
224 {
225 /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
226 .callback = ac_do_not_check_pmic_quirk,
227 .matches = {
228 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
229 DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
230 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
231 },
232 },
233 {
234 /* Lenovo Thinkpad e530, see comment in acpi_ac_notify() */
235 .callback = thinkpad_e530_quirk,
236 .matches = {
237 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
238 DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
239 },
240 },
241 {},
242};
243
244static int acpi_ac_add(struct acpi_device *device)
245{
246 struct power_supply_config psy_cfg = {};
247 int result = 0;
248 struct acpi_ac *ac = NULL;
249
250
251 if (!device)
252 return -EINVAL;
253
254 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
255 if (!ac)
256 return -ENOMEM;
257
258 ac->device = device;
259 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
260 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
261 device->driver_data = ac;
262
263 result = acpi_ac_get_state(ac);
264 if (result)
265 goto end;
266
267 psy_cfg.drv_data = ac;
268
269 ac->charger_desc.name = acpi_device_bid(device);
270 ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
271 ac->charger_desc.properties = ac_props;
272 ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
273 ac->charger_desc.get_property = get_ac_property;
274 ac->charger = power_supply_register(&ac->device->dev,
275 &ac->charger_desc, &psy_cfg);
276 if (IS_ERR(ac->charger)) {
277 result = PTR_ERR(ac->charger);
278 goto end;
279 }
280
281 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
282 acpi_device_name(device), acpi_device_bid(device),
283 ac->state ? "on-line" : "off-line");
284
285 ac->battery_nb.notifier_call = acpi_ac_battery_notify;
286 register_acpi_notifier(&ac->battery_nb);
287end:
288 if (result) {
289 kfree(ac);
290 }
291
292 return result;
293}
294
295#ifdef CONFIG_PM_SLEEP
296static int acpi_ac_resume(struct device *dev)
297{
298 struct acpi_ac *ac;
299 unsigned old_state;
300
301 if (!dev)
302 return -EINVAL;
303
304 ac = acpi_driver_data(to_acpi_device(dev));
305 if (!ac)
306 return -EINVAL;
307
308 old_state = ac->state;
309 if (acpi_ac_get_state(ac))
310 return 0;
311 if (old_state != ac->state)
312 kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
313 return 0;
314}
315#else
316#define acpi_ac_resume NULL
317#endif
318
319static int acpi_ac_remove(struct acpi_device *device)
320{
321 struct acpi_ac *ac = NULL;
322
323
324 if (!device || !acpi_driver_data(device))
325 return -EINVAL;
326
327 ac = acpi_driver_data(device);
328
329 power_supply_unregister(ac->charger);
330 unregister_acpi_notifier(&ac->battery_nb);
331
332 kfree(ac);
333
334 return 0;
335}
336
337static int __init acpi_ac_init(void)
338{
339 unsigned int i;
340 int result;
341
342 if (acpi_disabled)
343 return -ENODEV;
344
345 dmi_check_system(ac_dmi_table);
346
347 if (ac_check_pmic) {
348 for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
349 if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
350 acpi_ac_blacklist[i].hrv)) {
351 pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
352 acpi_ac_blacklist[i].hid);
353 return -ENODEV;
354 }
355 }
356
357 result = acpi_bus_register_driver(&acpi_ac_driver);
358 if (result < 0) {
359 return -ENODEV;
360 }
361
362 return 0;
363}
364
365static void __exit acpi_ac_exit(void)
366{
367 acpi_bus_unregister_driver(&acpi_ac_driver);
368}
369module_init(acpi_ac_init);
370module_exit(acpi_ac_exit);