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-rw-r--r--Documentation/rfkill.txt8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/rfkill.txt b/Documentation/rfkill.txt
index de941e309d47..1b74b5f30af4 100644
--- a/Documentation/rfkill.txt
+++ b/Documentation/rfkill.txt
@@ -113,7 +113,7 @@ The following sysfs entries exist for every rfkill device:
0: RFKILL_STATE_SOFT_BLOCKED
transmitter is turned off by software
1: RFKILL_STATE_UNBLOCKED
- transmiter is (potentially) active
+ transmitter is (potentially) active
2: RFKILL_STATE_HARD_BLOCKED
transmitter is forced off by something outside of
the driver's control.
@@ -128,3 +128,9 @@ RFKILL_TYPE
The contents of these variables corresponds to the "name", "state" and
"type" sysfs files explained above.
+
+An alternative userspace interface exists as a misc device /dev/rfkill,
+which allows userspace to obtain and set the state of rfkill devices and
+sets of devices. It also notifies userspace about device addition and
+removal. The API is a simple read/write API that is defined in
+linux/rfkill.h.