From 35009c807488ccd5a01cbf102033695e52794b68 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 1 Oct 2019 17:27:22 +0300 Subject: ACPI / utils: Introduce acpi_dev_hid_uid_match() helper There are users outside of ACPI realm which reimplementing the comparator function to check if the given device matches to given HID and UID. For better utilization, introduce a helper for everyone to use. Signed-off-by: Andy Shevchenko Reviewed-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- drivers/acpi/utils.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/acpi/utils.c') diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index dbd1c4cfd7d1..804ac0df58ec 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -701,6 +701,31 @@ bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs) } EXPORT_SYMBOL(acpi_check_dsm); +/** + * acpi_dev_hid_uid_match - Match device by supplied HID and UID + * @adev: ACPI device to match. + * @hid2: Hardware ID of the device. + * @uid2: Unique ID of the device, pass NULL to not check _UID. + * + * Matches HID and UID in @adev with given @hid2 and @uid2. + * Returns true if matches. + */ +bool acpi_dev_hid_uid_match(struct acpi_device *adev, + const char *hid2, const char *uid2) +{ + const char *hid1 = acpi_device_hid(adev); + const char *uid1 = acpi_device_uid(adev); + + if (strcmp(hid1, hid2)) + return false; + + if (!uid2) + return true; + + return uid1 && !strcmp(uid1, uid2); +} +EXPORT_SYMBOL(acpi_dev_hid_uid_match); + /** * acpi_dev_found - Detect presence of a given ACPI device in the namespace. * @hid: Hardware ID of the device. -- cgit