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authorYurii Pavlovskyi <yurii.pavlovskyi@gmail.com>2019-05-14 20:59:01 +0200
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2019-06-17 15:22:47 +0300
commite7488e58c7cfe4be0c52db68622a0397bb75258e (patch)
tree716fc0ec3d9b5e4899d1ba84579d71c504629484 /include/linux/acpi.h
parent98e865a522983f2afde075648ec9d15ea4bb9194 (diff)
platform/x86: wmi: Add function to get _UID of WMI device
Add a new function to acpi.h / wmi.c that returns _UID of the ACPI WMI device. For example, it returns "ATK" for the following declaration in DSDT: Device (ATKD) { Name (_HID, "PNP0C14" /* Windows Management Instrumentation Device */) // _HID: Hardware ID Name (_UID, "ATK") // _UID: Unique ID .. Generally, it is possible that multiple PNP0C14 ACPI devices are present in the system as mentioned in the commit message of commit bff431e49ff5 ("ACPI: WMI: Add ACPI-WMI mapping driver"). Therefore the _UID is returned for a specific ACPI device that declares the given GUID, to which it is also mapped by other methods of wmi module. Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'include/linux/acpi.h')
-rw-r--r--include/linux/acpi.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 98440df7fe42..d867a9a904f9 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -380,6 +380,7 @@ extern acpi_status wmi_install_notify_handler(const char *guid,
extern acpi_status wmi_remove_notify_handler(const char *guid);
extern acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out);
extern bool wmi_has_guid(const char *guid);
+extern char *wmi_get_acpi_device_uid(const char *guid);
#endif /* CONFIG_ACPI_WMI */