These are the power domains for the Qualcomm Snapdragon 670. I haven't tried to turn on EBI with pd_ignore_unused but it is not present in the Google's msm-4.9 vendor kernel. .../devicetree/bindings/power/qcom,rpmpd.yaml | 1 + drivers/soc/qcom/rpmhpd.c | 18 ++++++++++++++++++ include/dt-bindings/power/qcom-rpmpd.h | 10 ++++++++++ 3 files changed, 29 insertions(+)