ACPI: add support for Smart Battery

[linux-2.6-omap-h63xx.git] / drivers / acpi / ac.c

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 36ca365bcead4bca3baae6610ef83eb5dcd1aeec..e0a1b1541362a907a00891c81f95c7a4b8172d1d 100644 (file)
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -50,6 +50,9 @@ ACPI_MODULE_NAME("acpi_ac")
 MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME);
 MODULE_LICENSE("GPL");
 
+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_add(struct acpi_device *device);
 static int acpi_ac_remove(struct acpi_device *device, int type);
 static int acpi_ac_open_fs(struct inode *inode, struct file *file);
@@ -65,7 +68,7 @@ static struct acpi_driver acpi_ac_driver = {
 };
 
 struct acpi_ac {
-       acpi_handle handle;
+       struct acpi_device * device;
        unsigned long state;
 };
 
@@ -88,7 +91,7 @@ static int acpi_ac_get_state(struct acpi_ac *ac)
        if (!ac)
                return -EINVAL;
 
-       status = acpi_evaluate_integer(ac->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"));
                ac->state = ACPI_AC_STATUS_UNKNOWN;
@@ -191,9 +194,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
        if (!ac)
                return;
 
-       if (acpi_bus_get_device(ac->handle, &device))
-               return;
-
+       device = ac->device;
        switch (event) {
        case ACPI_AC_NOTIFY_STATUS:
                acpi_ac_get_state(ac);
@@ -223,7 +224,7 @@ static int acpi_ac_add(struct acpi_device *device)
                return -ENOMEM;
        memset(ac, 0, sizeof(struct acpi_ac));
 
-       ac->handle = device->handle;
+       ac->device = device;
        strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
        strcpy(acpi_device_class(device), ACPI_AC_CLASS);
        acpi_driver_data(device) = ac;
@@ -236,7 +237,7 @@ static int acpi_ac_add(struct acpi_device *device)
        if (result)
                goto end;
 
-       status = acpi_install_notify_handler(ac->handle,
+       status = acpi_install_notify_handler(device->handle,
                                             ACPI_DEVICE_NOTIFY, acpi_ac_notify,
                                             ac);
        if (ACPI_FAILURE(status)) {
@@ -268,7 +269,7 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
 
        ac = (struct acpi_ac *)acpi_driver_data(device);
 
-       status = acpi_remove_notify_handler(ac->handle,
+       status = acpi_remove_notify_handler(device->handle,
                                            ACPI_DEVICE_NOTIFY, acpi_ac_notify);
 
        acpi_ac_remove_fs(device);
@@ -280,17 +281,16 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
 
 static int __init acpi_ac_init(void)
 {
-       int result = 0;
+       int result;
 
 
-       acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
+       acpi_ac_dir = acpi_lock_ac_dir();
        if (!acpi_ac_dir)
                return -ENODEV;
-       acpi_ac_dir->owner = THIS_MODULE;
 
        result = acpi_bus_register_driver(&acpi_ac_driver);
        if (result < 0) {
-               remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
+               acpi_unlock_ac_dir(acpi_ac_dir);
                return -ENODEV;
        }
 
@@ -302,7 +302,7 @@ static void __exit acpi_ac_exit(void)
 
        acpi_bus_unregister_driver(&acpi_ac_driver);
 
-       remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
+       acpi_unlock_ac_dir(acpi_ac_dir);
 
        return;
 }