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| author | Zhang Rui <rui.zhang@intel.com> | 2008-01-25 14:48:06 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-07 03:22:57 -0500 |
| commit | 9ee85241fdaab358dff1d8647f20a478cfa512a1 (patch) | |
| tree | 8ecac98ed4d4683d5d9db0bf69e1a4a1532cf2ec | |
| parent | ba5e1223422368fd2f4dbb0745f5fbb5fe9a65f1 (diff) | |
| download | kernel_samsung_smdk4412-9ee85241fdaab358dff1d8647f20a478cfa512a1.zip kernel_samsung_smdk4412-9ee85241fdaab358dff1d8647f20a478cfa512a1.tar.gz kernel_samsung_smdk4412-9ee85241fdaab358dff1d8647f20a478cfa512a1.tar.bz2 | |
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>
| -rw-r--r-- | drivers/acpi/event.c | 28 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 3 |
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c index 5c95863..5479dc0 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 { diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index fb7171b..3f9f141 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -321,6 +321,9 @@ struct acpi_bus_event { extern struct kobject *acpi_kobj; extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); +extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); +extern int register_acpi_notifier(struct notifier_block *); +extern int unregister_acpi_notifier(struct notifier_block *); /* * External Functions */ |