Commit 5db72fdb authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Rafael J. Wysocki
Browse files

ACPI: utils: Add acpi_dev_uid_to_integer() helper to get _UID as integer 



Some users interpret _UID only as integer and for them it's easier to
have an integer representation of _UID. Add respective helper for that.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 521a547c

drivers/acpi/utils.c

+24 −0
Original line number Diff line number Diff line
@@ -793,6 +793,30 @@ bool acpi_dev_hid_uid_match(struct acpi_device *adev, 
}

EXPORT_SYMBOL(acpi_dev_hid_uid_match);



/**

 * acpi_dev_uid_to_integer - treat ACPI device _UID as integer

 * @adev: ACPI device to get _UID from

 * @integer: output buffer for integer

 *

 * Considers _UID as integer and converts it to @integer.

 *

 * Returns 0 on success, or negative error code otherwise.

 */

int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer)

{

	const char *uid;



	if (!adev)

		return -ENODEV;



	uid = acpi_device_uid(adev);

	if (!uid)

		return -ENODATA;



	return kstrtou64(uid, 0, integer);

}

EXPORT_SYMBOL(acpi_dev_uid_to_integer);



/**

 * acpi_dev_found - Detect presence of a given ACPI device in the namespace.

 * @hid: Hardware ID of the device.

include/acpi/acpi_bus.h

+1 −0
Original line number Diff line number Diff line
@@ -733,6 +733,7 @@ static inline bool acpi_device_can_poweroff(struct acpi_device *adev) 
}



bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);

int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer);



void acpi_dev_clear_dependencies(struct acpi_device *supplier);

bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);

include/linux/acpi.h

+5 −0
Original line number Diff line number Diff line
@@ -798,6 +798,11 @@ acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *u 
	return false;

}



static inline int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer)

{

	return -ENODEV;

}



static inline struct acpi_device *

acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv)

{