diff options
| author | Zhang Rui <rui.zhang@intel.com> | 2008-01-25 07:48:06 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-07 09:22:57 +0100 |
| commit | 9ee85241fdaab358dff1d8647f20a478cfa512a1 (patch) | |
| tree | 8ecac98ed4d4683d5d9db0bf69e1a4a1532cf2ec /drivers/acpi/event.c | |
| parent | ACPI: video: delete unused display switch on hotkey event code (diff) | |
| download | linux-9ee85241fdaab358dff1d8647f20a478cfa512a1.tar.xz linux-9ee85241fdaab358dff1d8647f20a478cfa512a1.zip | |
ACPI: create notifier chain to get hotkey events to graphics driver
Kernel mode graphics drivers need this ACPI notifier chaine
so that they can get notified upon hotkey events.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/event.c')
| -rw-r--r-- | drivers/acpi/event.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c index 5c95863f8fa9..5479dc0eeeec 100644 --- a/drivers/acpi/event.c +++ b/drivers/acpi/event.c @@ -109,6 +109,34 @@ static const struct file_operations acpi_system_event_ops = { }; #endif /* CONFIG_ACPI_PROC_EVENT */ +/* ACPI notifier chain */ +BLOCKING_NOTIFIER_HEAD(acpi_chain_head); + +int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data) +{ + struct acpi_bus_event event; + + strcpy(event.device_class, dev->pnp.device_class); + strcpy(event.bus_id, dev->pnp.bus_id); + event.type = type; + event.data = data; + return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event) + == NOTIFY_BAD) ? -EINVAL : 0; +} +EXPORT_SYMBOL(acpi_notifier_call_chain); + +int register_acpi_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&acpi_chain_head, nb); +} +EXPORT_SYMBOL(register_acpi_notifier); + +int unregister_acpi_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&acpi_chain_head, nb); +} +EXPORT_SYMBOL(unregister_acpi_notifier); + #ifdef CONFIG_NET static unsigned int acpi_event_seqnum; struct acpi_genl_event { |