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 <[email protected]> --- drivers/acpi/utils.c | 25 +++++++++++++++++++++++++ include/acpi/acpi_bus.h | 3 +++ include/linux/acpi.h | 6 ++++++ 3 files changed, 34 insertions(+) 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. diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 175f7b40c585..d3cc8a786065 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -75,6 +75,9 @@ acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev, .package.elements = (eles) \ } +bool acpi_dev_hid_uid_match(struct acpi_device *adev, + const char *hid2, const char *uid2); + bool acpi_dev_found(const char *hid); bool acpi_dev_present(const char *hid, const char *uid, s64 hrv); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 9426b9aaed86..272b51a4f385 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -662,6 +662,12 @@ static inline u64 acpi_arch_get_root_pointer(void) struct fwnode_handle; +static inline bool acpi_dev_hid_uid_match(struct acpi_device *adev, + const char *hid2, const char *uid2) +{ + return false; +} + static inline bool acpi_dev_found(const char *hid) { return false; -- 2.23.0 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
