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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-30 14:27:29 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-30 14:27:29 +0100
commitca589f9469641916f4f9bd6a820012a27102ef63 (patch)
tree2bce51955303a0d33e2c52d37f0052ac19c1d445 /include/acpi
parent8b4e2fa4ff72ba2c9f01af8def15d4c4eeeeed64 (diff)
downloadop-kernel-dev-ca589f9469641916f4f9bd6a820012a27102ef63.zip
op-kernel-dev-ca589f9469641916f4f9bd6a820012a27102ef63.tar.gz
ACPI / scan: Introduce struct acpi_scan_handler
Introduce struct acpi_scan_handler for representing objects that will do configuration tasks depending on ACPI device nodes' hardware IDs (HIDs). Currently, those tasks are done either directly by the ACPI namespace scanning code or by ACPI device drivers designed specifically for this purpose. None of the above is desirable, however, because doing that directly in the namespace scanning code makes that code overly complicated and difficult to follow and doing that in "special" device drivers leads to a great deal of confusion about their role and to confusing interactions with the driver core (for example, sysfs directories are created for those drivers, but they are completely unnecessary and only increase the kernel's memory footprint in vain). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Acked-by: Toshi Kani <toshi.kani@hp.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index ad0a86a..41850cb 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -84,6 +84,18 @@ struct acpi_driver;
struct acpi_device;
/*
+ * ACPI Scan Handler
+ * -----------------
+ */
+
+struct acpi_scan_handler {
+ const struct acpi_device_id *ids;
+ struct list_head list_node;
+ int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
+ void (*detach)(struct acpi_device *dev);
+};
+
+/*
* ACPI Driver
* -----------
*/
@@ -269,6 +281,7 @@ struct acpi_device {
struct acpi_device_wakeup wakeup;
struct acpi_device_perf performance;
struct acpi_device_dir dir;
+ struct acpi_scan_handler *handler;
struct acpi_driver *driver;
void *driver_data;
struct device dev;
@@ -382,6 +395,7 @@ int acpi_bus_receive_event(struct acpi_bus_event *event);
static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
{ return 0; }
#endif
+int acpi_scan_add_handler(struct acpi_scan_handler *handler);
int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
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