commit 87713eda596c13078490dde07add22a4f73ddb74
author Yilong Li <liyl@google.com> Mon Jul 26 21:19:03 2021 +0000
committer CQ Bot <commit-bot@chromium.org> Mon Jul 26 21:19:03 2021 +0000
tree e416ad4313ac7c4efaa69559f40defdf3bcdfda2
parent 8a10292ddb6695f3b4518fa9825d2ba6197f1d64

[goldfish] Add goldfish sensor driver.

Goldfish-sensor is a multisensor device that produces
sensor reports for multiple sensor devices using goldfish
(qemud) pipe device.

Since the device needs to provide sensor reports for
multiple different kinds of sensors (currently only
accelerometer and gyrometer are supported, and more will
be added), HID bus device doesn't work and thus we create and
manage multiple fuchsia.input.report.InputDevice devices
instead.

The root device (goldfish-sensor-root) is responsible for
pipe asynchronous IO, managing and dispatching the pipe
messages to corresponding input devices.

Each input device (goldfish-sensor-...) will appear in
/dev/class/input-report and serve the InputDevice FIDL
protocol.

TEST=added unit tests to goldfish-sensor-test
  - input_device_test
  - root_device_test
  - parser_test

Fixed: 78205
Change-Id: I0726b47955134fa36da584097093f703f1735a1d
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/556165
Commit-Queue: Yilong Li <liyl@google.com>
Reviewed-by: Suraj Malhotra <surajmalhotra@google.com>
Reviewed-by: David Reveman <reveman@google.com>
Reviewed-by: David Gilhooley <dgilhooley@google.com>