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ACPI: Provide generic functions for matching ACPI device nodes

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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>
This commit is contained in:
Mika Westerberg 2012-10-31 22:44:41 +01:00 • committed by Rafael J. Wysocki
parent 06f64c8f23
commit cf761af9ee
2 changed files with 63 additions and 5 deletions
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28
include/linux/acpi.h
View file

@ -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