I should also note that for quite some time a hack [1] has been needed on some platforms for the RPMCC to register. This includes 8992/94, 8956/76 and possibly many more. With that commit, RPMCC registers fine. [1] https://github.com/kholk/kernel-upstream/commit/5df7bb6e337c0a41b2cc6477cddc718d622d7545 Regards Konrad