1 files changed, 2 insertions, 0 deletions

diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index bce1d959b703..7daca0553676 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -1494,6 +1494,8 @@ to enable more than one output class, just add their values.
                                 accessing some functions of the driver
         0x0001                  Initialization and probing
         0x0002                  Removal
+        0x0004                  RF Transmitter control (RFKILL)
+                                (bluetooth, WWAN, UWB...)
 
 There is also a kernel build option to enable more debugging
 information, which may be necessary to debug driver problems.