print-input-report
A utility that can attach itself to an input device and read the device descriptors or events.
fx set ... --with=//src/ui/tools/print-input-report fx build fx test //src/ui/tools/print-input-report
From the host command line:
fx shell print-input-report descriptor /dev/class/input-report/002
The invocation below will print usage.
fx shell print-input-report