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-rw-r--r--Documentation/extcon/intel-int3496.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/extcon/intel-int3496.txt b/Documentation/extcon/intel-int3496.txt
index af0b366c25b7..8155dbc7fad3 100644
--- a/Documentation/extcon/intel-int3496.txt
+++ b/Documentation/extcon/intel-int3496.txt
@@ -20,3 +20,8 @@ Index 1: The output gpio for enabling Vbus output from the device to the otg
Index 2: The output gpio for muxing of the data pins between the USB host and
the USB peripheral controller, write 1 to mux to the peripheral
controller
+
+There is a mapping between indices and GPIO connection IDs as follows
+ id index 0
+ vbus index 1
+ mux index 2