diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/scan.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index b7308efce45..20c23c04920 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -359,6 +359,61 @@ static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) return 0; } +static void acpi_device_notify(acpi_handle handle, u32 event, void *data) +{ + struct acpi_device *device = data; + + device->driver->ops.notify(device, event); +} + +static acpi_status acpi_device_notify_fixed(void *data) +{ + struct acpi_device *device = data; + + acpi_device_notify(device->handle, ACPI_FIXED_HARDWARE_EVENT, device); + return AE_OK; +} + +static int acpi_device_install_notify_handler(struct acpi_device *device) +{ + acpi_status status; + char *hid; + + hid = acpi_device_hid(device); + if (!strcmp(hid, ACPI_BUTTON_HID_POWERF)) + status = + acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, + acpi_device_notify_fixed, + device); + else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) + status = + acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, + acpi_device_notify_fixed, + device); + else + status = acpi_install_notify_handler(device->handle, + ACPI_DEVICE_NOTIFY, + acpi_device_notify, + device); + + if (ACPI_FAILURE(status)) + return -EINVAL; + return 0; +} + +static void acpi_device_remove_notify_handler(struct acpi_device *device) +{ + if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) + acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, + acpi_device_notify_fixed); + else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) + acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, + acpi_device_notify_fixed); + else + acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, + acpi_device_notify); +} + static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); static int acpi_start_single_object(struct acpi_device *); static int acpi_device_probe(struct device * dev) @@ -371,6 +426,20 @@ static int acpi_device_probe(struct device * dev) if (!ret) { if (acpi_dev->bus_ops.acpi_op_start) acpi_start_single_object(acpi_dev); + + if (acpi_drv->ops.notify) { + ret = acpi_device_install_notify_handler(acpi_dev); + if (ret) { + if (acpi_drv->ops.stop) + acpi_drv->ops.stop(acpi_dev, + acpi_dev->removal_type); + if (acpi_drv->ops.remove) + acpi_drv->ops.remove(acpi_dev, + acpi_dev->removal_type); + return ret; + } + } + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", acpi_drv->name, acpi_dev->pnp.bus_id)); @@ -385,6 +454,8 @@ static int acpi_device_remove(struct device * dev) struct acpi_driver *acpi_drv = acpi_dev->driver; if (acpi_drv) { + if (acpi_drv->ops.notify) + acpi_device_remove_notify_handler(acpi_dev); if (acpi_drv->ops.stop) acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type); if (acpi_drv->ops.remove) |