greybus: connection: document the sysfs files
Document what the sysfs files are for connections, so that people have a
chance to understand what they can be used for.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/drivers/staging/greybus/Documentation/sysfs-bus-greybus b/drivers/staging/greybus/Documentation/sysfs-bus-greybus
index cd1d812..b734c67 100644
--- a/drivers/staging/greybus/Documentation/sysfs-bus-greybus
+++ b/drivers/staging/greybus/Documentation/sysfs-bus-greybus
@@ -33,3 +33,23 @@
Description:
Vendor ID string of a Greybus interface block.
+What: /sys/bus/greybus/device/.../state
+Date: December 2014
+KernelVersion: 3.XX
+Contact: Greg Kroah-Hartman <greg@kroah.com>
+Description:
+ The current state of a Greybus connection.
+
+ It will be one of the following values:
+ 0 - invalid
+ 1 - disabled
+ 2 - enabled
+ 3 - error
+ 4 - destroying
+
+What: /sys/bus/greybus/device/.../protocol_id
+Date: December 2014
+KernelVersion: 3.XX
+Contact: Greg Kroah-Hartman <greg@kroah.com>
+Description:
+ The protocol id of a Greybus connection.