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>wifi-calibration
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ba5e122342
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9ee85241fd
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@ -109,6 +109,34 @@ static const struct file_operations acpi_system_event_ops = {
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};
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};
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#endif /* CONFIG_ACPI_PROC_EVENT */
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#endif /* CONFIG_ACPI_PROC_EVENT */
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/* ACPI notifier chain */
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BLOCKING_NOTIFIER_HEAD(acpi_chain_head);
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int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data)
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{
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struct acpi_bus_event event;
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strcpy(event.device_class, dev->pnp.device_class);
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strcpy(event.bus_id, dev->pnp.bus_id);
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event.type = type;
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event.data = data;
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return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event)
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== NOTIFY_BAD) ? -EINVAL : 0;
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}
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EXPORT_SYMBOL(acpi_notifier_call_chain);
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int register_acpi_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_register(&acpi_chain_head, nb);
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}
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EXPORT_SYMBOL(register_acpi_notifier);
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int unregister_acpi_notifier(struct notifier_block *nb)
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{
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return blocking_notifier_chain_unregister(&acpi_chain_head, nb);
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}
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EXPORT_SYMBOL(unregister_acpi_notifier);
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#ifdef CONFIG_NET
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#ifdef CONFIG_NET
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static unsigned int acpi_event_seqnum;
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static unsigned int acpi_event_seqnum;
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struct acpi_genl_event {
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struct acpi_genl_event {
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@ -321,6 +321,9 @@ struct acpi_bus_event {
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extern struct kobject *acpi_kobj;
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extern struct kobject *acpi_kobj;
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extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
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extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
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extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
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extern int register_acpi_notifier(struct notifier_block *);
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extern int unregister_acpi_notifier(struct notifier_block *);
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/*
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/*
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* External Functions
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* External Functions
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*/
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*/
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