diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-10-01 17:27:22 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-10-15 12:06:23 +0200 |
| commit | 35009c807488ccd5a01cbf102033695e52794b68 (patch) | |
| tree | 6a2775611a87926f1b74be76e1c519ec8cc5a0ff /drivers/acpi/utils.c | |
| parent | a814dcc269830c9dbb8a83731cfc6fc5dd787f8d (diff) | |
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 <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/utils.c')
| -rw-r--r-- | drivers/acpi/utils.c | 25 |
1 files changed, 25 insertions, 0 deletions
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 @@ -702,6 +702,31 @@ 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. * |