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path: root/drivers/acpi/ac.c
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Diffstat (limited to 'drivers/acpi/ac.c')
-rw-r--r--drivers/acpi/ac.c96
1 files changed, 61 insertions, 35 deletions
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index f37beaa3275..36b0e61f9c0 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -34,9 +34,10 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif
+#include <linux/platform_device.h>
#include <linux/power_supply.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
+#include <linux/acpi.h>
+#include "battery.h"
#define PREFIX "ACPI: "
@@ -55,11 +56,6 @@ MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
MODULE_LICENSE("GPL");
-#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);
-static int acpi_ac_open_fs(struct inode *inode, struct file *file);
-#endif
static int acpi_ac_add(struct acpi_device *device);
static int acpi_ac_remove(struct acpi_device *device);
@@ -76,6 +72,13 @@ 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);
+static int acpi_ac_open_fs(struct inode *inode, struct file *file);
+#endif
+
+
static int ac_sleep_before_get_state_ms;
static struct acpi_driver acpi_ac_driver = {
@@ -95,6 +98,7 @@ struct acpi_ac {
struct power_supply charger;
struct acpi_device * device;
unsigned long long state;
+ struct notifier_block battery_nb;
};
#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
@@ -117,13 +121,14 @@ 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);
+ 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"));
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Error reading AC Adapter state"));
ac->state = ACPI_AC_STATUS_UNKNOWN;
return -ENODEV;
}
@@ -201,36 +206,36 @@ static int acpi_ac_open_fs(struct inode *inode, struct file *file)
return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
}
-static int acpi_ac_add_fs(struct acpi_device *device)
+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(device)) {
- acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
- acpi_ac_dir);
- if (!acpi_device_dir(device))
+ 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_data(ACPI_AC_FILE_STATE,
- S_IRUGO, acpi_device_dir(device),
- &acpi_ac_fops, acpi_driver_data(device));
+ S_IRUGO, acpi_device_dir(ac->device),
+ &acpi_ac_fops, ac);
if (!entry)
return -ENODEV;
return 0;
}
-static int acpi_ac_remove_fs(struct acpi_device *device)
+static int acpi_ac_remove_fs(struct acpi_ac *ac)
{
- if (acpi_device_dir(device)) {
- remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
-
- remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
- acpi_device_dir(device) = NULL;
+ 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;
@@ -245,7 +250,6 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
{
struct acpi_ac *ac = acpi_driver_data(device);
-
if (!ac)
return;
@@ -277,6 +281,26 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
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 thinkpad_e530_quirk(const struct dmi_system_id *d)
{
ac_sleep_before_get_state_ms = 1000;
@@ -317,12 +341,12 @@ static int acpi_ac_add(struct acpi_device *device)
if (result)
goto end;
+ ac->charger.name = acpi_device_bid(device);
#ifdef CONFIG_ACPI_PROCFS_POWER
- result = acpi_ac_add_fs(device);
-#endif
+ result = acpi_ac_add_fs(ac);
if (result)
goto end;
- ac->charger.name = acpi_device_bid(device);
+#endif
ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
ac->charger.properties = ac_props;
ac->charger.num_properties = ARRAY_SIZE(ac_props);
@@ -335,10 +359,12 @@ static int acpi_ac_add(struct acpi_device *device)
acpi_device_name(device), acpi_device_bid(device),
ac->state ? "on-line" : "off-line");
- end:
+ 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(device);
+ acpi_ac_remove_fs(ac);
#endif
kfree(ac);
}
@@ -367,6 +393,8 @@ static int acpi_ac_resume(struct device *dev)
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)
@@ -381,8 +409,10 @@ static int acpi_ac_remove(struct acpi_device *device)
if (ac->charger.dev)
power_supply_unregister(&ac->charger);
+ unregister_acpi_notifier(&ac->battery_nb);
+
#ifdef CONFIG_ACPI_PROCFS_POWER
- acpi_ac_remove_fs(device);
+ acpi_ac_remove_fs(ac);
#endif
kfree(ac);
@@ -403,6 +433,7 @@ static int __init acpi_ac_init(void)
return -ENODEV;
#endif
+
result = acpi_bus_register_driver(&acpi_ac_driver);
if (result < 0) {
#ifdef CONFIG_ACPI_PROCFS_POWER
@@ -416,15 +447,10 @@ static int __init acpi_ac_init(void)
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
-
- return;
}
-
module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 06:03:07 +0000