tree 9f0662ade186a796fec8bb9d69338c5e55f19b79
parent affea8bfc77162d8631b48f1eb5e79c06b96302f
author Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com> 1491294909 +0530
committer Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com> 1493188346 +0530

Populate the file descriptor for the device

On a GPIO chip, there could be many gpio lines and for each line,
there would be a corresponding input device event file.
To know the assertion state of a GPIO line, a descriptor is needed.
This descriptor will later be plugged into sd_event so that the
GPIO state changes can be caught and handled.

Change-Id: Idc8c2b429688fea2a5124b96677085b1be48128b
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>