2 * battery.c - ACPI Battery Driver (Revision: 2.0)
4 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
6 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
7 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/types.h>
32 #include <linux/jiffies.h>
34 #ifdef CONFIG_ACPI_PROCFS
35 #include <linux/proc_fs.h>
36 #include <linux/seq_file.h>
37 #include <asm/uaccess.h>
40 #include <acpi/acpi_bus.h>
41 #include <acpi/acpi_drivers.h>
43 #include <linux/power_supply.h>
45 #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
47 #define ACPI_BATTERY_COMPONENT 0x00040000
48 #define ACPI_BATTERY_CLASS "battery"
49 #define ACPI_BATTERY_DEVICE_NAME "Battery"
50 #define ACPI_BATTERY_NOTIFY_STATUS 0x80
51 #define ACPI_BATTERY_NOTIFY_INFO 0x81
53 #define _COMPONENT ACPI_BATTERY_COMPONENT
55 ACPI_MODULE_NAME("battery");
57 MODULE_AUTHOR("Paul Diefenbaugh");
58 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
59 MODULE_DESCRIPTION("ACPI Battery Driver");
60 MODULE_LICENSE("GPL");
62 static unsigned int cache_time
= 1000;
63 module_param(cache_time
, uint
, 0644);
64 MODULE_PARM_DESC(cache_time
, "cache time in milliseconds");
66 #ifdef CONFIG_ACPI_PROCFS
67 extern struct proc_dir_entry
*acpi_lock_battery_dir(void);
68 extern void *acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir
);
70 enum acpi_battery_files
{
74 ACPI_BATTERY_NUMFILES
,
79 static const struct acpi_device_id battery_device_ids
[] = {
84 MODULE_DEVICE_TABLE(acpi
, battery_device_ids
);
89 struct power_supply bat
;
90 struct acpi_device
*device
;
91 unsigned long update_time
;
96 int full_charge_capacity
;
99 int design_capacity_warning
;
100 int design_capacity_low
;
101 int capacity_granularity_1
;
102 int capacity_granularity_2
;
104 char model_number
[32];
105 char serial_number
[32];
113 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
115 inline int acpi_battery_present(struct acpi_battery
*battery
)
117 return battery
->device
->status
.battery_present
;
120 static int acpi_battery_technology(struct acpi_battery
*battery
)
122 if (!strcasecmp("NiCd", battery
->type
))
123 return POWER_SUPPLY_TECHNOLOGY_NiCd
;
124 if (!strcasecmp("NiMH", battery
->type
))
125 return POWER_SUPPLY_TECHNOLOGY_NiMH
;
126 if (!strcasecmp("LION", battery
->type
))
127 return POWER_SUPPLY_TECHNOLOGY_LION
;
128 if (!strcasecmp("LiP", battery
->type
))
129 return POWER_SUPPLY_TECHNOLOGY_LIPO
;
130 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN
;
133 static int acpi_battery_get_property(struct power_supply
*psy
,
134 enum power_supply_property psp
,
135 union power_supply_propval
*val
)
137 struct acpi_battery
*battery
= to_acpi_battery(psy
);
139 if ((!acpi_battery_present(battery
)) &&
140 psp
!= POWER_SUPPLY_PROP_PRESENT
)
143 case POWER_SUPPLY_PROP_STATUS
:
144 if (battery
->state
& 0x01)
145 val
->intval
= POWER_SUPPLY_STATUS_DISCHARGING
;
146 else if (battery
->state
& 0x02)
147 val
->intval
= POWER_SUPPLY_STATUS_CHARGING
;
148 else if (battery
->state
== 0)
149 val
->intval
= POWER_SUPPLY_STATUS_FULL
;
151 case POWER_SUPPLY_PROP_PRESENT
:
152 val
->intval
= acpi_battery_present(battery
);
154 case POWER_SUPPLY_PROP_TECHNOLOGY
:
155 val
->intval
= acpi_battery_technology(battery
);
157 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
:
158 val
->intval
= battery
->design_voltage
* 1000;
160 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
161 val
->intval
= battery
->voltage_now
* 1000;
163 case POWER_SUPPLY_PROP_CURRENT_NOW
:
164 val
->intval
= battery
->current_now
* 1000;
166 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
:
167 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
:
168 val
->intval
= battery
->design_capacity
* 1000;
170 case POWER_SUPPLY_PROP_CHARGE_FULL
:
171 case POWER_SUPPLY_PROP_ENERGY_FULL
:
172 val
->intval
= battery
->full_charge_capacity
* 1000;
174 case POWER_SUPPLY_PROP_CHARGE_NOW
:
175 case POWER_SUPPLY_PROP_ENERGY_NOW
:
176 val
->intval
= battery
->capacity_now
* 1000;
178 case POWER_SUPPLY_PROP_MODEL_NAME
:
179 val
->strval
= battery
->model_number
;
181 case POWER_SUPPLY_PROP_MANUFACTURER
:
182 val
->strval
= battery
->oem_info
;
190 static enum power_supply_property charge_battery_props
[] = {
191 POWER_SUPPLY_PROP_STATUS
,
192 POWER_SUPPLY_PROP_PRESENT
,
193 POWER_SUPPLY_PROP_TECHNOLOGY
,
194 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
195 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
196 POWER_SUPPLY_PROP_CURRENT_NOW
,
197 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN
,
198 POWER_SUPPLY_PROP_CHARGE_FULL
,
199 POWER_SUPPLY_PROP_CHARGE_NOW
,
200 POWER_SUPPLY_PROP_MODEL_NAME
,
201 POWER_SUPPLY_PROP_MANUFACTURER
,
204 static enum power_supply_property energy_battery_props
[] = {
205 POWER_SUPPLY_PROP_STATUS
,
206 POWER_SUPPLY_PROP_PRESENT
,
207 POWER_SUPPLY_PROP_TECHNOLOGY
,
208 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN
,
209 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
210 POWER_SUPPLY_PROP_CURRENT_NOW
,
211 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN
,
212 POWER_SUPPLY_PROP_ENERGY_FULL
,
213 POWER_SUPPLY_PROP_ENERGY_NOW
,
214 POWER_SUPPLY_PROP_MODEL_NAME
,
215 POWER_SUPPLY_PROP_MANUFACTURER
,
218 #ifdef CONFIG_ACPI_PROCFS
219 inline char *acpi_battery_units(struct acpi_battery
*battery
)
221 return (battery
->power_unit
)?"mA":"mW";
225 /* --------------------------------------------------------------------------
227 -------------------------------------------------------------------------- */
228 struct acpi_offsets
{
229 size_t offset
; /* offset inside struct acpi_sbs_battery */
230 u8 mode
; /* int or string? */
233 static struct acpi_offsets state_offsets
[] = {
234 {offsetof(struct acpi_battery
, state
), 0},
235 {offsetof(struct acpi_battery
, current_now
), 0},
236 {offsetof(struct acpi_battery
, capacity_now
), 0},
237 {offsetof(struct acpi_battery
, voltage_now
), 0},
240 static struct acpi_offsets info_offsets
[] = {
241 {offsetof(struct acpi_battery
, power_unit
), 0},
242 {offsetof(struct acpi_battery
, design_capacity
), 0},
243 {offsetof(struct acpi_battery
, full_charge_capacity
), 0},
244 {offsetof(struct acpi_battery
, technology
), 0},
245 {offsetof(struct acpi_battery
, design_voltage
), 0},
246 {offsetof(struct acpi_battery
, design_capacity_warning
), 0},
247 {offsetof(struct acpi_battery
, design_capacity_low
), 0},
248 {offsetof(struct acpi_battery
, capacity_granularity_1
), 0},
249 {offsetof(struct acpi_battery
, capacity_granularity_2
), 0},
250 {offsetof(struct acpi_battery
, model_number
), 1},
251 {offsetof(struct acpi_battery
, serial_number
), 1},
252 {offsetof(struct acpi_battery
, type
), 1},
253 {offsetof(struct acpi_battery
, oem_info
), 1},
256 static int extract_package(struct acpi_battery
*battery
,
257 union acpi_object
*package
,
258 struct acpi_offsets
*offsets
, int num
)
261 union acpi_object
*element
;
262 if (package
->type
!= ACPI_TYPE_PACKAGE
)
264 for (i
= 0; i
< num
; ++i
) {
265 if (package
->package
.count
<= i
)
267 element
= &package
->package
.elements
[i
];
268 if (offsets
[i
].mode
) {
269 if (element
->type
!= ACPI_TYPE_STRING
&&
270 element
->type
!= ACPI_TYPE_BUFFER
)
272 strncpy((u8
*)battery
+ offsets
[i
].offset
,
273 element
->string
.pointer
, 32);
275 if (element
->type
!= ACPI_TYPE_INTEGER
)
277 x
= (int *)((u8
*)battery
+ offsets
[i
].offset
);
278 *x
= element
->integer
.value
;
284 static int acpi_battery_get_status(struct acpi_battery
*battery
)
286 if (acpi_bus_get_status(battery
->device
)) {
287 ACPI_EXCEPTION((AE_INFO
, AE_ERROR
, "Evaluating _STA"));
293 static int acpi_battery_get_info(struct acpi_battery
*battery
)
295 int result
= -EFAULT
;
296 acpi_status status
= 0;
297 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
299 if (!acpi_battery_present(battery
))
301 mutex_lock(&battery
->lock
);
302 status
= acpi_evaluate_object(battery
->device
->handle
, "_BIF",
304 mutex_unlock(&battery
->lock
);
306 if (ACPI_FAILURE(status
)) {
307 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _BIF"));
311 result
= extract_package(battery
, buffer
.pointer
,
312 info_offsets
, ARRAY_SIZE(info_offsets
));
313 kfree(buffer
.pointer
);
317 static int acpi_battery_get_state(struct acpi_battery
*battery
)
320 acpi_status status
= 0;
321 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
323 if (!acpi_battery_present(battery
))
326 if (battery
->update_time
&&
327 time_before(jiffies
, battery
->update_time
+
328 msecs_to_jiffies(cache_time
)))
331 mutex_lock(&battery
->lock
);
332 status
= acpi_evaluate_object(battery
->device
->handle
, "_BST",
334 mutex_unlock(&battery
->lock
);
336 if (ACPI_FAILURE(status
)) {
337 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _BST"));
341 result
= extract_package(battery
, buffer
.pointer
,
342 state_offsets
, ARRAY_SIZE(state_offsets
));
343 battery
->update_time
= jiffies
;
344 kfree(buffer
.pointer
);
348 static int acpi_battery_set_alarm(struct acpi_battery
*battery
)
350 acpi_status status
= 0;
351 union acpi_object arg0
= { .type
= ACPI_TYPE_INTEGER
};
352 struct acpi_object_list arg_list
= { 1, &arg0
};
354 if (!acpi_battery_present(battery
)|| !battery
->alarm_present
)
357 arg0
.integer
.value
= battery
->alarm
;
359 mutex_lock(&battery
->lock
);
360 status
= acpi_evaluate_object(battery
->device
->handle
, "_BTP",
362 mutex_unlock(&battery
->lock
);
364 if (ACPI_FAILURE(status
))
367 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Alarm set to %d\n", battery
->alarm
));
371 static int acpi_battery_init_alarm(struct acpi_battery
*battery
)
373 acpi_status status
= AE_OK
;
374 acpi_handle handle
= NULL
;
376 /* See if alarms are supported, and if so, set default */
377 status
= acpi_get_handle(battery
->device
->handle
, "_BTP", &handle
);
378 if (ACPI_FAILURE(status
)) {
379 battery
->alarm_present
= 0;
382 battery
->alarm_present
= 1;
384 battery
->alarm
= battery
->design_capacity_warning
;
385 return acpi_battery_set_alarm(battery
);
388 static int acpi_battery_update(struct acpi_battery
*battery
)
390 int saved_present
= acpi_battery_present(battery
);
391 int result
= acpi_battery_get_status(battery
);
392 if (result
|| !acpi_battery_present(battery
))
394 if (saved_present
!= acpi_battery_present(battery
) ||
395 !battery
->update_time
) {
396 battery
->update_time
= 0;
397 result
= acpi_battery_get_info(battery
);
400 if (battery
->power_unit
) {
401 battery
->bat
.properties
= charge_battery_props
;
402 battery
->bat
.num_properties
=
403 ARRAY_SIZE(charge_battery_props
);
405 battery
->bat
.properties
= energy_battery_props
;
406 battery
->bat
.num_properties
=
407 ARRAY_SIZE(energy_battery_props
);
409 acpi_battery_init_alarm(battery
);
411 return acpi_battery_get_state(battery
);
414 /* --------------------------------------------------------------------------
416 -------------------------------------------------------------------------- */
418 #ifdef CONFIG_ACPI_PROCFS
419 static struct proc_dir_entry
*acpi_battery_dir
;
421 static int acpi_battery_print_info(struct seq_file
*seq
, int result
)
423 struct acpi_battery
*battery
= seq
->private;
428 seq_printf(seq
, "present: %s\n",
429 acpi_battery_present(battery
)?"yes":"no");
430 if (!acpi_battery_present(battery
))
432 if (battery
->design_capacity
== ACPI_BATTERY_VALUE_UNKNOWN
)
433 seq_printf(seq
, "design capacity: unknown\n");
435 seq_printf(seq
, "design capacity: %d %sh\n",
436 battery
->design_capacity
,
437 acpi_battery_units(battery
));
439 if (battery
->full_charge_capacity
== ACPI_BATTERY_VALUE_UNKNOWN
)
440 seq_printf(seq
, "last full capacity: unknown\n");
442 seq_printf(seq
, "last full capacity: %d %sh\n",
443 battery
->full_charge_capacity
,
444 acpi_battery_units(battery
));
446 seq_printf(seq
, "battery technology: %srechargeable\n",
447 (!battery
->technology
)?"non-":"");
449 if (battery
->design_voltage
== ACPI_BATTERY_VALUE_UNKNOWN
)
450 seq_printf(seq
, "design voltage: unknown\n");
452 seq_printf(seq
, "design voltage: %d mV\n",
453 battery
->design_voltage
);
454 seq_printf(seq
, "design capacity warning: %d %sh\n",
455 battery
->design_capacity_warning
,
456 acpi_battery_units(battery
));
457 seq_printf(seq
, "design capacity low: %d %sh\n",
458 battery
->design_capacity_low
,
459 acpi_battery_units(battery
));
460 seq_printf(seq
, "capacity granularity 1: %d %sh\n",
461 battery
->capacity_granularity_1
,
462 acpi_battery_units(battery
));
463 seq_printf(seq
, "capacity granularity 2: %d %sh\n",
464 battery
->capacity_granularity_2
,
465 acpi_battery_units(battery
));
466 seq_printf(seq
, "model number: %s\n", battery
->model_number
);
467 seq_printf(seq
, "serial number: %s\n", battery
->serial_number
);
468 seq_printf(seq
, "battery type: %s\n", battery
->type
);
469 seq_printf(seq
, "OEM info: %s\n", battery
->oem_info
);
472 seq_printf(seq
, "ERROR: Unable to read battery info\n");
476 static int acpi_battery_print_state(struct seq_file
*seq
, int result
)
478 struct acpi_battery
*battery
= seq
->private;
483 seq_printf(seq
, "present: %s\n",
484 acpi_battery_present(battery
)?"yes":"no");
485 if (!acpi_battery_present(battery
))
488 seq_printf(seq
, "capacity state: %s\n",
489 (battery
->state
& 0x04)?"critical":"ok");
490 if ((battery
->state
& 0x01) && (battery
->state
& 0x02))
492 "charging state: charging/discharging\n");
493 else if (battery
->state
& 0x01)
494 seq_printf(seq
, "charging state: discharging\n");
495 else if (battery
->state
& 0x02)
496 seq_printf(seq
, "charging state: charging\n");
498 seq_printf(seq
, "charging state: charged\n");
500 if (battery
->current_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
501 seq_printf(seq
, "present rate: unknown\n");
503 seq_printf(seq
, "present rate: %d %s\n",
504 battery
->current_now
, acpi_battery_units(battery
));
506 if (battery
->capacity_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
507 seq_printf(seq
, "remaining capacity: unknown\n");
509 seq_printf(seq
, "remaining capacity: %d %sh\n",
510 battery
->capacity_now
, acpi_battery_units(battery
));
511 if (battery
->voltage_now
== ACPI_BATTERY_VALUE_UNKNOWN
)
512 seq_printf(seq
, "present voltage: unknown\n");
514 seq_printf(seq
, "present voltage: %d mV\n",
515 battery
->voltage_now
);
518 seq_printf(seq
, "ERROR: Unable to read battery state\n");
523 static int acpi_battery_print_alarm(struct seq_file
*seq
, int result
)
525 struct acpi_battery
*battery
= seq
->private;
530 if (!acpi_battery_present(battery
)) {
531 seq_printf(seq
, "present: no\n");
534 seq_printf(seq
, "alarm: ");
536 seq_printf(seq
, "unsupported\n");
538 seq_printf(seq
, "%u %sh\n", battery
->alarm
,
539 acpi_battery_units(battery
));
542 seq_printf(seq
, "ERROR: Unable to read battery alarm\n");
546 static ssize_t
acpi_battery_write_alarm(struct file
*file
,
547 const char __user
* buffer
,
548 size_t count
, loff_t
* ppos
)
551 char alarm_string
[12] = { '\0' };
552 struct seq_file
*m
= file
->private_data
;
553 struct acpi_battery
*battery
= m
->private;
555 if (!battery
|| (count
> sizeof(alarm_string
) - 1))
561 if (!acpi_battery_present(battery
)) {
565 if (copy_from_user(alarm_string
, buffer
, count
)) {
569 alarm_string
[count
] = '\0';
570 battery
->alarm
= simple_strtol(alarm_string
, NULL
, 0);
571 result
= acpi_battery_set_alarm(battery
);
578 typedef int(*print_func
)(struct seq_file
*seq
, int result
);
580 static print_func acpi_print_funcs
[ACPI_BATTERY_NUMFILES
] = {
581 acpi_battery_print_info
,
582 acpi_battery_print_state
,
583 acpi_battery_print_alarm
,
586 static int acpi_battery_read(int fid
, struct seq_file
*seq
)
588 struct acpi_battery
*battery
= seq
->private;
589 int result
= acpi_battery_update(battery
);
590 return acpi_print_funcs
[fid
](seq
, result
);
593 #define DECLARE_FILE_FUNCTIONS(_name) \
594 static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
596 return acpi_battery_read(_name##_tag, seq); \
598 static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
600 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
603 DECLARE_FILE_FUNCTIONS(info
);
604 DECLARE_FILE_FUNCTIONS(state
);
605 DECLARE_FILE_FUNCTIONS(alarm
);
607 #undef DECLARE_FILE_FUNCTIONS
609 #define FILE_DESCRIPTION_RO(_name) \
611 .name = __stringify(_name), \
614 .open = acpi_battery_##_name##_open_fs, \
616 .llseek = seq_lseek, \
617 .release = single_release, \
618 .owner = THIS_MODULE, \
622 #define FILE_DESCRIPTION_RW(_name) \
624 .name = __stringify(_name), \
625 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
627 .open = acpi_battery_##_name##_open_fs, \
629 .llseek = seq_lseek, \
630 .write = acpi_battery_write_##_name, \
631 .release = single_release, \
632 .owner = THIS_MODULE, \
636 static struct battery_file
{
637 struct file_operations ops
;
640 } acpi_battery_file
[] = {
641 FILE_DESCRIPTION_RO(info
),
642 FILE_DESCRIPTION_RO(state
),
643 FILE_DESCRIPTION_RW(alarm
),
646 #undef FILE_DESCRIPTION_RO
647 #undef FILE_DESCRIPTION_RW
649 static int acpi_battery_add_fs(struct acpi_device
*device
)
651 struct proc_dir_entry
*entry
= NULL
;
654 if (!acpi_device_dir(device
)) {
655 acpi_device_dir(device
) = proc_mkdir(acpi_device_bid(device
),
657 if (!acpi_device_dir(device
))
659 acpi_device_dir(device
)->owner
= THIS_MODULE
;
662 for (i
= 0; i
< ACPI_BATTERY_NUMFILES
; ++i
) {
663 entry
= create_proc_entry(acpi_battery_file
[i
].name
,
664 acpi_battery_file
[i
].mode
, acpi_device_dir(device
));
668 entry
->proc_fops
= &acpi_battery_file
[i
].ops
;
669 entry
->data
= acpi_driver_data(device
);
670 entry
->owner
= THIS_MODULE
;
676 static void acpi_battery_remove_fs(struct acpi_device
*device
)
679 if (!acpi_device_dir(device
))
681 for (i
= 0; i
< ACPI_BATTERY_NUMFILES
; ++i
)
682 remove_proc_entry(acpi_battery_file
[i
].name
,
683 acpi_device_dir(device
));
685 remove_proc_entry(acpi_device_bid(device
), acpi_battery_dir
);
686 acpi_device_dir(device
) = NULL
;
690 /* --------------------------------------------------------------------------
692 -------------------------------------------------------------------------- */
694 static void acpi_battery_notify(acpi_handle handle
, u32 event
, void *data
)
696 struct acpi_battery
*battery
= data
;
697 struct acpi_device
*device
;
700 device
= battery
->device
;
701 acpi_battery_update(battery
);
702 acpi_bus_generate_proc_event(device
, event
,
703 acpi_battery_present(battery
));
704 acpi_bus_generate_netlink_event(device
->pnp
.device_class
,
705 device
->dev
.bus_id
, event
,
706 acpi_battery_present(battery
));
707 kobject_uevent(&battery
->bat
.dev
->kobj
, KOBJ_CHANGE
);
710 static int acpi_battery_add(struct acpi_device
*device
)
713 acpi_status status
= 0;
714 struct acpi_battery
*battery
= NULL
;
717 battery
= kzalloc(sizeof(struct acpi_battery
), GFP_KERNEL
);
720 battery
->device
= device
;
721 strcpy(acpi_device_name(device
), ACPI_BATTERY_DEVICE_NAME
);
722 strcpy(acpi_device_class(device
), ACPI_BATTERY_CLASS
);
723 acpi_driver_data(device
) = battery
;
724 mutex_init(&battery
->lock
);
725 acpi_battery_update(battery
);
726 #ifdef CONFIG_ACPI_PROCFS
727 result
= acpi_battery_add_fs(device
);
731 battery
->bat
.name
= acpi_device_bid(device
);
732 battery
->bat
.type
= POWER_SUPPLY_TYPE_BATTERY
;
733 battery
->bat
.get_property
= acpi_battery_get_property
;
734 result
= power_supply_register(&battery
->device
->dev
, &battery
->bat
);
735 status
= acpi_install_notify_handler(device
->handle
,
737 acpi_battery_notify
, battery
);
738 if (ACPI_FAILURE(status
)) {
739 ACPI_EXCEPTION((AE_INFO
, status
, "Installing notify handler"));
743 printk(KERN_INFO PREFIX
"%s Slot [%s] (battery %s)\n",
744 ACPI_BATTERY_DEVICE_NAME
, acpi_device_bid(device
),
745 device
->status
.battery_present
? "present" : "absent");
748 #ifdef CONFIG_ACPI_PROCFS
749 acpi_battery_remove_fs(device
);
756 static int acpi_battery_remove(struct acpi_device
*device
, int type
)
758 acpi_status status
= 0;
759 struct acpi_battery
*battery
= NULL
;
761 if (!device
|| !acpi_driver_data(device
))
763 battery
= acpi_driver_data(device
);
764 status
= acpi_remove_notify_handler(device
->handle
,
766 acpi_battery_notify
);
767 #ifdef CONFIG_ACPI_PROCFS
768 acpi_battery_remove_fs(device
);
770 if (battery
->bat
.dev
)
771 power_supply_unregister(&battery
->bat
);
772 mutex_destroy(&battery
->lock
);
777 /* this is needed to learn about changes made in suspended state */
778 static int acpi_battery_resume(struct acpi_device
*device
)
780 struct acpi_battery
*battery
;
783 battery
= acpi_driver_data(device
);
784 battery
->update_time
= 0;
788 static struct acpi_driver acpi_battery_driver
= {
790 .class = ACPI_BATTERY_CLASS
,
791 .ids
= battery_device_ids
,
793 .add
= acpi_battery_add
,
794 .resume
= acpi_battery_resume
,
795 .remove
= acpi_battery_remove
,
799 static int __init
acpi_battery_init(void)
803 #ifdef CONFIG_ACPI_PROCFS
804 acpi_battery_dir
= acpi_lock_battery_dir();
805 if (!acpi_battery_dir
)
808 if (acpi_bus_register_driver(&acpi_battery_driver
) < 0) {
809 #ifdef CONFIG_ACPI_PROCFS
810 acpi_unlock_battery_dir(acpi_battery_dir
);
817 static void __exit
acpi_battery_exit(void)
819 acpi_bus_unregister_driver(&acpi_battery_driver
);
820 #ifdef CONFIG_ACPI_PROCFS
821 acpi_unlock_battery_dir(acpi_battery_dir
);
825 module_init(acpi_battery_init
);
826 module_exit(acpi_battery_exit
);