added note on new config insn

diff --git a/Documentation/comedi/insn_config b/Documentation/comedi/insn_config
index 7d7ecb016bf74f45aee86858564c9d351e25036e..3edd2894540fa2bea9ef10d6f077e257bfb4e454 100644 (file)
--- a/Documentation/comedi/insn_config
+++ b/Documentation/comedi/insn_config
@@ -175,4 +175,8 @@ Applications:
 
   - 
 
+ID=INSN_CONFIG_ALT_SOURCE: select alternate input source (internal calibration reference)
+
+  [0] - ID
+  [1] - source