added brief description for INSN_CONFIG_TIMER_1

diff --git a/Documentation/comedi/insn_config b/Documentation/comedi/insn_config
index d25300ad27f77224f8ffccb47f85c17682cbdec2..5c2103fcf4d8908d30148ebaf55bbb75fe662733 100644 (file)
--- a/Documentation/comedi/insn_config
+++ b/Documentation/comedi/insn_config
@@ -174,7 +174,9 @@ ID=INSN_CONFIG_ALT_SOURCE: select alternate input source (internal calibration r
   [0] - ID
   [1] - source
 
-ID=INSN_CONFIG_TIMER_1
+ID=INSN_CONFIG_TIMER_1: Configure an external master clock and divisor
+       to divide clock by.  Used with commands by setting scan_begin_src or
+       convert_src set to TRIG_OTHER.
 
   [0] - ID
   [1] - trigger configuration (COMEDI_EV_SCAN_BEGIN, COMEDI_EV_CONVERT, etc.)