mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
f4fe74cc90
These update the ACPICA code in the kernel to the 20180508 upstream revision and make it support the RT patch, add CPPC v3 support to the ACPI CPPC library, add a WDAT-based watchdog quirk to prevent clashes with the RTC, add quirks to the ACPI AC and battery drivers, and update the ACPI SoC drivers. Specifics: - Update the ACPICA code in the kernel to the 20180508 upstream revision including: * iASL -tc option enhancement (Bob Moore). * Debugger improvements (Bob Moore). * Support for tables larger than 1 MB in acpidump/acpixtract (Bob Moore). * Minor fixes and cleanups (Colin Ian King, Toomas Soome). - Make the ACPICA code in the kernel support the RT patch (Sebastian Andrzej Siewior, Steven Rostedt). - Add a kmemleak annotation to the ACPICA code (Larry Finger). - Add CPPC v3 support to the ACPI CPPC library and fix two issues related to CPPC (Prashanth Prakash, Al Stone). - Add an ACPI WDAT-based watchdog quirk to prefer iTCO_wdt on systems where WDAT clashes with the RTC SRAM (Mika Westerberg). - Add some quirks to the ACPI AC and battery drivers (Carlo Caione, Hans de Goede). - Update the ACPI SoC drivers for Intel (LPSS) and AMD (APD) platforms (Akshu Agrawal, Hans de Goede). - Fix up some assorted minor issues (Al Stone, Laszlo Toth, Mathieu Malaterre). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJbFR2IAAoJEILEb/54YlRxsEcP/0vxyGvTXUnHH13h1ayhbcEL qKA//1Zvw55mFb86nlnIVWUfpVx5pN4sOd2MZL2bDmNP8+ZX1QFbwtkpP8MtnRyX 0pmPb2QpmHz/ZHutVg3rGxFOV4Sk0IPevQW7d4eu/Gc6K/UkfREMj10PWu9EoNWm 6UCKuONxeoUAtE/OTfvU33ghpYgBH506Kg6/EwLLRX0tA10NBa11L9ijUEkVfa0s RDn5Z9ndjGGed4XtlSNkfabEJpc6uX9JvbAw77DKZgyqEZgQyNa4CZ2C1ZtH66lZ HCS62eJ6ePGUvzW/KTn825+MOGni5YisGlfonHuF9xHpPNSp7Doxmyny3lMYHL7S l0XdI2G7UIOFO5eaRM/zYQPQyF05lna28MVvTWJWBA3bcUz4rav9fzPKYp5l+To0 xK1Ol84sowlkOKoi/RIcOx5nsh05SufGqNu9RuXjRZ4iK0bJPCD3YNt+tH95b94M 0YOuoDkIylieVET4xgHB5vBOj8EgMOLtSaGSpEbh816i+BdZMx7YnS4xSmQ+JFjd rVCJMnXcLZ82j3pkvPpR0W3VLVbEJPjLftENjSVJ+vA9lR567byBFrvzTEmsEQoi KlNWh5qDmoR96dPheLdhD1HtsL070xLhyqYOUDvtqTiVH8uNxoWfQzcSfvXPvLqc XGCcG/oPP9FFpNZfLzAB =FAIF -----END PGP SIGNATURE----- Merge tag 'acpi-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI updates from Rafael Wysocki: "These update the ACPICA code in the kernel to the 20180508 upstream revision and make it support the RT patch, add CPPC v3 support to the ACPI CPPC library, add a WDAT-based watchdog quirk to prevent clashes with the RTC, add quirks to the ACPI AC and battery drivers, and update the ACPI SoC drivers. Specifics: - Update the ACPICA code in the kernel to the 20180508 upstream revision including: * iASL -tc option enhancement (Bob Moore). * Debugger improvements (Bob Moore). * Support for tables larger than 1 MB in acpidump/acpixtract (Bob Moore). * Minor fixes and cleanups (Colin Ian King, Toomas Soome). - Make the ACPICA code in the kernel support the RT patch (Sebastian Andrzej Siewior, Steven Rostedt). - Add a kmemleak annotation to the ACPICA code (Larry Finger). - Add CPPC v3 support to the ACPI CPPC library and fix two issues related to CPPC (Prashanth Prakash, Al Stone). - Add an ACPI WDAT-based watchdog quirk to prefer iTCO_wdt on systems where WDAT clashes with the RTC SRAM (Mika Westerberg). - Add some quirks to the ACPI AC and battery drivers (Carlo Caione, Hans de Goede). - Update the ACPI SoC drivers for Intel (LPSS) and AMD (APD) platforms (Akshu Agrawal, Hans de Goede). - Fix up some assorted minor issues (Al Stone, Laszlo Toth, Mathieu Malaterre)" * tag 'acpi-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) ACPICA: Mark acpi_ut_create_internal_object_dbg() memory allocations as non-leaks ACPI / watchdog: Prefer iTCO_wdt always when WDAT table uses RTC SRAM mailbox: PCC: erroneous error message when parsing ACPI PCCT ACPICA: Update version to 20180508 ACPICA: acpidump/acpixtract: Support for tables larger than 1MB ACPI: APD: Add AMD misc clock handler support clk: x86: Add ST oscout platform clock ACPICA: Update version to 20180427 ACPICA: Debugger: Removed direct support for EC address space in "Test Objects" ACPICA: Debugger: Add Package support for "test objects" command ACPICA: Improve error messages for the namespace root node ACPICA: Fix potential infinite loop in acpi_rs_dump_byte_list ACPICA: vsnprintf: this statement may fall through ACPICA: Tables: Fix spelling mistake in comment ACPICA: iASL: Enhance the -tc option (create AML hex file in C) ACPI: Add missing prototype_for arch_post_acpi_subsys_init() ACPI / tables: improve comments regarding acpi_parse_entries_array() ACPICA: Convert acpi_gbl_hardware lock back to an acpi_raw_spinlock ACPICA: provide abstraction for raw_spinlock_t ACPI / CPPC: Fix invalid PCC channel status errors ...
489 lines
12 KiB
C
489 lines
12 KiB
C
/*
|
|
* acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
|
|
*
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/delay.h>
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#endif
|
|
#include <linux/platform_device.h>
|
|
#include <linux/power_supply.h>
|
|
#include <linux/acpi.h>
|
|
#include <acpi/battery.h>
|
|
|
|
#define PREFIX "ACPI: "
|
|
|
|
#define ACPI_AC_CLASS "ac_adapter"
|
|
#define ACPI_AC_DEVICE_NAME "AC Adapter"
|
|
#define ACPI_AC_FILE_STATE "state"
|
|
#define ACPI_AC_NOTIFY_STATUS 0x80
|
|
#define ACPI_AC_STATUS_OFFLINE 0x00
|
|
#define ACPI_AC_STATUS_ONLINE 0x01
|
|
#define ACPI_AC_STATUS_UNKNOWN 0xFF
|
|
|
|
#define _COMPONENT ACPI_AC_COMPONENT
|
|
ACPI_MODULE_NAME("ac");
|
|
|
|
MODULE_AUTHOR("Paul Diefenbaugh");
|
|
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
static int acpi_ac_add(struct acpi_device *device);
|
|
static int acpi_ac_remove(struct acpi_device *device);
|
|
static void acpi_ac_notify(struct acpi_device *device, u32 event);
|
|
|
|
struct acpi_ac_bl {
|
|
const char *hid;
|
|
int hrv;
|
|
};
|
|
|
|
static const struct acpi_device_id ac_device_ids[] = {
|
|
{"ACPI0003", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, ac_device_ids);
|
|
|
|
/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
|
|
static const struct acpi_ac_bl acpi_ac_blacklist[] = {
|
|
{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
|
|
{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
|
|
};
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int acpi_ac_resume(struct device *dev);
|
|
#endif
|
|
static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
extern struct proc_dir_entry *acpi_lock_ac_dir(void);
|
|
extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
|
|
#endif
|
|
|
|
|
|
static int ac_sleep_before_get_state_ms;
|
|
static int ac_check_pmic = 1;
|
|
|
|
static struct acpi_driver acpi_ac_driver = {
|
|
.name = "ac",
|
|
.class = ACPI_AC_CLASS,
|
|
.ids = ac_device_ids,
|
|
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
|
|
.ops = {
|
|
.add = acpi_ac_add,
|
|
.remove = acpi_ac_remove,
|
|
.notify = acpi_ac_notify,
|
|
},
|
|
.drv.pm = &acpi_ac_pm,
|
|
};
|
|
|
|
struct acpi_ac {
|
|
struct power_supply *charger;
|
|
struct power_supply_desc charger_desc;
|
|
struct acpi_device * device;
|
|
unsigned long long state;
|
|
struct notifier_block battery_nb;
|
|
};
|
|
|
|
#define to_acpi_ac(x) power_supply_get_drvdata(x)
|
|
|
|
/* --------------------------------------------------------------------------
|
|
AC Adapter Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int acpi_ac_get_state(struct acpi_ac *ac)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
if (!ac)
|
|
return -EINVAL;
|
|
|
|
status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
|
|
&ac->state);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Error reading AC Adapter state"));
|
|
ac->state = ACPI_AC_STATUS_UNKNOWN;
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
sysfs I/F
|
|
-------------------------------------------------------------------------- */
|
|
static int get_ac_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct acpi_ac *ac = to_acpi_ac(psy);
|
|
|
|
if (!ac)
|
|
return -ENODEV;
|
|
|
|
if (acpi_ac_get_state(ac))
|
|
return -ENODEV;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = ac->state;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property ac_props[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct proc_dir_entry *acpi_ac_dir;
|
|
|
|
static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_ac *ac = seq->private;
|
|
|
|
|
|
if (!ac)
|
|
return 0;
|
|
|
|
if (acpi_ac_get_state(ac)) {
|
|
seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
|
|
return 0;
|
|
}
|
|
|
|
seq_puts(seq, "state: ");
|
|
switch (ac->state) {
|
|
case ACPI_AC_STATUS_OFFLINE:
|
|
seq_puts(seq, "off-line\n");
|
|
break;
|
|
case ACPI_AC_STATUS_ONLINE:
|
|
seq_puts(seq, "on-line\n");
|
|
break;
|
|
default:
|
|
seq_puts(seq, "unknown\n");
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_ac_add_fs(struct acpi_ac *ac)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
|
|
" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
|
|
if (!acpi_device_dir(ac->device)) {
|
|
acpi_device_dir(ac->device) =
|
|
proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
|
|
if (!acpi_device_dir(ac->device))
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* 'state' [R] */
|
|
entry = proc_create_single_data(ACPI_AC_FILE_STATE, S_IRUGO,
|
|
acpi_device_dir(ac->device), acpi_ac_seq_show, ac);
|
|
if (!entry)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_ac_remove_fs(struct acpi_ac *ac)
|
|
{
|
|
|
|
if (acpi_device_dir(ac->device)) {
|
|
remove_proc_entry(ACPI_AC_FILE_STATE,
|
|
acpi_device_dir(ac->device));
|
|
remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
|
|
acpi_device_dir(ac->device) = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Model
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_ac_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_ac *ac = acpi_driver_data(device);
|
|
|
|
if (!ac)
|
|
return;
|
|
|
|
switch (event) {
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
/* fall through */
|
|
case ACPI_AC_NOTIFY_STATUS:
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
case ACPI_NOTIFY_DEVICE_CHECK:
|
|
/*
|
|
* A buggy BIOS may notify AC first and then sleep for
|
|
* a specific time before doing actual operations in the
|
|
* EC event handler (_Qxx). This will cause the AC state
|
|
* reported by the ACPI event to be incorrect, so wait for a
|
|
* specific time for the EC event handler to make progress.
|
|
*/
|
|
if (ac_sleep_before_get_state_ms > 0)
|
|
msleep(ac_sleep_before_get_state_ms);
|
|
|
|
acpi_ac_get_state(ac);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
dev_name(&device->dev), event,
|
|
(u32) ac->state);
|
|
acpi_notifier_call_chain(device, event, (u32) ac->state);
|
|
kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int acpi_ac_battery_notify(struct notifier_block *nb,
|
|
unsigned long action, void *data)
|
|
{
|
|
struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
|
|
struct acpi_bus_event *event = (struct acpi_bus_event *)data;
|
|
|
|
/*
|
|
* On HP Pavilion dv6-6179er AC status notifications aren't triggered
|
|
* when adapter is plugged/unplugged. However, battery status
|
|
* notifcations are triggered when battery starts charging or
|
|
* discharging. Re-reading AC status triggers lost AC notifications,
|
|
* if AC status has changed.
|
|
*/
|
|
if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
|
|
event->type == ACPI_BATTERY_NOTIFY_STATUS)
|
|
acpi_ac_get_state(ac);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
|
|
{
|
|
ac_sleep_before_get_state_ms = 1000;
|
|
return 0;
|
|
}
|
|
|
|
static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
|
|
{
|
|
ac_check_pmic = 0;
|
|
return 0;
|
|
}
|
|
|
|
static const struct dmi_system_id ac_dmi_table[] __initconst = {
|
|
{
|
|
/* Thinkpad e530 */
|
|
.callback = thinkpad_e530_quirk,
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
|
|
},
|
|
},
|
|
{
|
|
/* ECS EF20EA */
|
|
.callback = ac_do_not_check_pmic_quirk,
|
|
.matches = {
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
|
|
},
|
|
},
|
|
{
|
|
/* Lenovo Ideapad Miix 320 */
|
|
.callback = ac_do_not_check_pmic_quirk,
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
|
|
},
|
|
},
|
|
{},
|
|
};
|
|
|
|
static int acpi_ac_add(struct acpi_device *device)
|
|
{
|
|
struct power_supply_config psy_cfg = {};
|
|
int result = 0;
|
|
struct acpi_ac *ac = NULL;
|
|
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
|
|
if (!ac)
|
|
return -ENOMEM;
|
|
|
|
ac->device = device;
|
|
strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_AC_CLASS);
|
|
device->driver_data = ac;
|
|
|
|
result = acpi_ac_get_state(ac);
|
|
if (result)
|
|
goto end;
|
|
|
|
psy_cfg.drv_data = ac;
|
|
|
|
ac->charger_desc.name = acpi_device_bid(device);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
result = acpi_ac_add_fs(ac);
|
|
if (result)
|
|
goto end;
|
|
#endif
|
|
ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
|
|
ac->charger_desc.properties = ac_props;
|
|
ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
|
|
ac->charger_desc.get_property = get_ac_property;
|
|
ac->charger = power_supply_register(&ac->device->dev,
|
|
&ac->charger_desc, &psy_cfg);
|
|
if (IS_ERR(ac->charger)) {
|
|
result = PTR_ERR(ac->charger);
|
|
goto end;
|
|
}
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
ac->state ? "on-line" : "off-line");
|
|
|
|
ac->battery_nb.notifier_call = acpi_ac_battery_notify;
|
|
register_acpi_notifier(&ac->battery_nb);
|
|
end:
|
|
if (result) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_ac_remove_fs(ac);
|
|
#endif
|
|
kfree(ac);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int acpi_ac_resume(struct device *dev)
|
|
{
|
|
struct acpi_ac *ac;
|
|
unsigned old_state;
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
ac = acpi_driver_data(to_acpi_device(dev));
|
|
if (!ac)
|
|
return -EINVAL;
|
|
|
|
old_state = ac->state;
|
|
if (acpi_ac_get_state(ac))
|
|
return 0;
|
|
if (old_state != ac->state)
|
|
kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define acpi_ac_resume NULL
|
|
#endif
|
|
|
|
static int acpi_ac_remove(struct acpi_device *device)
|
|
{
|
|
struct acpi_ac *ac = NULL;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
ac = acpi_driver_data(device);
|
|
|
|
power_supply_unregister(ac->charger);
|
|
unregister_acpi_notifier(&ac->battery_nb);
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_ac_remove_fs(ac);
|
|
#endif
|
|
|
|
kfree(ac);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init acpi_ac_init(void)
|
|
{
|
|
unsigned int i;
|
|
int result;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
dmi_check_system(ac_dmi_table);
|
|
|
|
if (ac_check_pmic) {
|
|
for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
|
|
if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
|
|
acpi_ac_blacklist[i].hrv)) {
|
|
pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
|
|
acpi_ac_blacklist[i].hid);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_ac_dir = acpi_lock_ac_dir();
|
|
if (!acpi_ac_dir)
|
|
return -ENODEV;
|
|
#endif
|
|
|
|
|
|
result = acpi_bus_register_driver(&acpi_ac_driver);
|
|
if (result < 0) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_ac_dir(acpi_ac_dir);
|
|
#endif
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_ac_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&acpi_ac_driver);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_ac_dir(acpi_ac_dir);
|
|
#endif
|
|
}
|
|
module_init(acpi_ac_init);
|
|
module_exit(acpi_ac_exit);
|