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ACPI: check battery status on resume for un/plug events during sleep

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Add ->resume method to the ACPI battery handler to check
if the battery state has changed during sleep.
If yes, update the ACPI internal data structures
for benefit of /proc/acpi/battery/.

Signed-off-by: Jiri Kosina <jikos@jikos.cz>
Cc: Stefan Seyfried <seife@suse.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Jiri Kosina
2006-10-10 14:20:41 -07:00
committed by Len Brown
parent 3cd5b87d96
commit 34c4415ab8
1 changed files with 14 additions and 0 deletions
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14
drivers/acpi/battery.c
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@@ -64,6 +64,7 @@ extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
static int acpi_battery_add(struct acpi_device *device); static int acpi_battery_add(struct acpi_device *device);
static int acpi_battery_remove(struct acpi_device *device, int type); static int acpi_battery_remove(struct acpi_device *device, int type);
static int acpi_battery_resume(struct acpi_device *device, int status);
static struct acpi_driver acpi_battery_driver = { static struct acpi_driver acpi_battery_driver = {
.name = ACPI_BATTERY_DRIVER_NAME, .name = ACPI_BATTERY_DRIVER_NAME,
@@ -71,6 +72,7 @@ static struct acpi_driver acpi_battery_driver = {
.ids = ACPI_BATTERY_HID, .ids = ACPI_BATTERY_HID,
.ops = { .ops = {
.add = acpi_battery_add, .add = acpi_battery_add,
.resume = acpi_battery_resume,
.remove = acpi_battery_remove, .remove = acpi_battery_remove,
}, },
}; };
@@ -753,6 +755,18 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
return 0; return 0;
} }
/* this is needed to learn about changes made in suspended state */
static int acpi_battery_resume(struct acpi_device *device, int state)
{
struct acpi_battery *battery;
if (!device)
return -EINVAL;
battery = device->driver_data;
return acpi_battery_check(battery);
}
static int __init acpi_battery_init(void) static int __init acpi_battery_init(void)
{ {
int result; int result;