Why are some of the hardware/imx drivers tagged as 'eng'?

[jaapdejong]

I am using the android_M6_0.1_2.0.0_source drivers for our android board, and (for example) lights.imx6 does not get included on our user builds because it is tagged as 'eng' in LOCAL_MODULE_TAGS in hardware/imx/lights/Android.mk.

Why is this module tagged as 'eng'? It looks mature enough, any risks if I change the tag to optional?

Regards

[SergioSolis]

Were you able to change it to opt?, you should be able to do it and not have a problem with it.