https://kernel.googlesource.com/pub/scm/linux/kernel/git/iwamatsu/linux-visconti/+/59815d6d1c773f3609ef9da50881a47e9cba9c25/arch/powerpc/platforms/85xx/t1042rdb_diu.c
arch/powerpc/platforms/85xx/t1042rdb_diu.c - pub/scm/linux/kernel/git/iwamatsu/linux-visconti - Git...
https://www.ikonixusa.com/whitepapers/understanding-85xx-configurations-and-functional-mode-options
EEC 85XX Configurations and Functional Mode Options
Whitepapers - Understanding EEC 85XX Configurations and Functional Mode Options
eecconfigurationsfunctionalmodeoptions