tree 0b0c515d5c57926e290d148677bbd32c74fc2c0e
parent d7be555ee0d885418e9a862b16565a0474c68d14
author Chris Cain <cjcain@us.ibm.com> 1721854680 -0500
committer Chris Cain <cjcain@us.ibm.com> 1731509768 -0600

Add support for GPIO polling for presence detection

The current PresenceGpio implementation uses event driven detection by
using the gpioLine.event_read method to detect GPIO signal changes, and
then to determine the presence status.

This commit will add support for a PollingPresenceGpio for GPIOs that
do not support events. It will use a pollTimer to periodically read the
GPIO status (every second).

The monitorPresence() function should be called to initiate the
monitoring of the GPIO.

TEST: Tested with multiple GPIOs including disabling to simulate
removing of device and enable to re-detect device. Unable to test Event
driven GPIO due to no hw available.

Change-Id: If46e884ad237dfe909a9373773c8302a0844ac90
Signed-off-by: Chris Cain <cjcain@us.ibm.com>