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On SoCs where the GPU's power-domain is in charge of setting performance levels, the OPP table of the GPU node will have already been populated during said power-domain's attach_dev operation. To avoid initialising an OPP table twice, only set the OPP regulator and the OPPs from DT if there's no OPP table present. Reviewed-by: Chia-I Wu <olvaffe@gmail.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Steven Price <steven.price@arm.com> Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Link: https://patch.msgid.link/20251017-mt8196-gpufreq-v8-4-98fc1cc566a1@collabora.com Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>