hello michaelbdevine,
it seems you had also update Topic 75517 about SLVS-EC.
you may refer to below for slvs-ec reference drivers and device tree,
$L4T_Sources/r32.4.2/Linux_for_Tegra/source/public/kernel/nvidia/drivers/media/spi/imx204.c
$L4T_Sources/r32.4.2/Linux_for_Tegra/source/public/hardware/nvidia/platform/t19x/common/kernel-dts/t19x-common-modules/tegra194-camera-e3377-a00.dtsi
in addition, you should flash the board with configuration file to configure UPHY properly , i.e. jetson-xavier-slvs-ec.conf
we had only validate slvs-ec with IMX204 internally,
please contact with Jetson Preferred Partners directly about your request,
thanks