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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2019-10-01 17:27:22 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-10-15 12:06:23 +0200
commit35009c807488ccd5a01cbf102033695e52794b68 (patch)
tree6a2775611a87926f1b74be76e1c519ec8cc5a0ff /drivers/acpi/utils.c
parenta814dcc269830c9dbb8a83731cfc6fc5dd787f8d (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.c25
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.
*