greybus: Documentation/sysfs-bus-greybus: document module sysfs files

This documents the module slot sysfs files "epm", "power_control", and
"present".

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

diff --git a/drivers/staging/greybus/Documentation/sysfs-bus-greybus b/drivers/staging/greybus/Documentation/sysfs-bus-greybus
index c0e0c0aad94be999db14fd5a317cf096e7c63789..4b511dbff0da9af4a9d35d8723fe41090bb5bf72 100644 (file)
--- a/drivers/staging/greybus/Documentation/sysfs-bus-greybus
+++ b/drivers/staging/greybus/Documentation/sysfs-bus-greybus
@@ -21,6 +21,36 @@ Contact:     Greg Kroah-Hartman <greg@kroah.com>
 Description:
                The version number of the firmware in the SVC device.
 
+What:          /sys/bus/greybus/device/endo-XXXX/../epm
+Date:          October 2015
+KernelVersion: 4.XX
+Contact:       Greg Kroah-Hartman <greg@kroah.com>
+Description:
+               The EPM (Electropermanent Magnet) control file for
+               the specific module slot the file is present in.
+               Writing 1 to it turns it on, writing 0 to it turns it
+               off.  Reading the value returns if it is on or off.
+
+What:          /sys/bus/greybus/device/endo-XXXX/../power_control
+Date:          October 2015
+KernelVersion: 4.XX
+Contact:       Greg Kroah-Hartman <greg@kroah.com>
+Description:
+               The power control file for the specific module slot that
+               the file is present in.  Writing 1 to it turns power on
+               to the module, writing 0 to it turns power off to the
+               module.  Reading the value returns if it is on or off.
+
+What:          /sys/bus/greybus/device/endo-XXXX/../present
+Date:          October 2015
+KernelVersion: 4.XX
+Contact:       Greg Kroah-Hartman <greg@kroah.com>
+Description:
+               The "is a module present in the slot" file for the
+               specific module slot that the file is present in.
+               This is read-only, 1 means a module is present, 0 means
+               no module is present.
+
 What:          /sys/bus/greybus/device/.../product
 Date:          October 2015
 KernelVersion: 4.XX