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authorMika Westerberg <mika.westerberg@linux.intel.com>2012-11-01 01:44:41 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 03:28:00 +0400
commitcf761af9ee0f2c172710ad2b7ca029016b5d4c45 (patch)
treec73b0ccfd422545508188fd8ee31ea2d192e1a82 /include/linux/acpi.h
parent06f64c8f239a47b359c60301914c783b56b32c13 (diff)
downloadlinux-cf761af9ee0f2c172710ad2b7ca029016b5d4c45.tar.xz
ACPI: Provide generic functions for matching ACPI device nodes
Introduce function acpi_match_device() allowing callers to match struct device objects with populated acpi_handle fields against arrays of ACPI device IDs. Also introduce function acpi_driver_match_device() using acpi_match_device() internally and allowing callers to match a struct device object against an array of ACPI device IDs provided by a device driver. Additionally, introduce macro ACPI_PTR() that may be used by device drivers to escape pointers to data structures whose definitions depend on CONFIG_ACPI. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/acpi.h')
-rw-r--r--include/linux/acpi.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 90be98981102..48761cb481db 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -26,6 +26,7 @@
#define _LINUX_ACPI_H
#include <linux/ioport.h> /* for struct resource */
+#include <linux/device.h>
#ifdef CONFIG_ACPI
@@ -364,6 +365,17 @@ extern int acpi_nvs_register(__u64 start, __u64 size);
extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
void *data);
+const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
+ const struct device *dev);
+
+static inline bool acpi_driver_match_device(struct device *dev,
+ const struct device_driver *drv)
+{
+ return !!acpi_match_device(drv->acpi_match_table, dev);
+}
+
+#define ACPI_PTR(_ptr) (_ptr)
+
#else /* !CONFIG_ACPI */
#define acpi_disabled 1
@@ -418,6 +430,22 @@ static inline int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
return 0;
}
+struct acpi_device_id;
+
+static inline const struct acpi_device_id *acpi_match_device(
+ const struct acpi_device_id *ids, const struct device *dev)
+{
+ return NULL;
+}
+
+static inline bool acpi_driver_match_device(struct device *dev,
+ const struct device_driver *drv)
+{
+ return false;
+}
+
+#define ACPI_PTR(_ptr) (NULL)
+
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_ACPI