AD7682 interface to Linux processor

Hi there, Running into a few issues while attempting to setup the IIO subsystem.

Using this as a basis -https://wiki.analog.com/resources/tools-software/linux-drivers/iio-adc/ad7476a

1. The first instruction is to specify the reference voltage via the regulator framework. I'm assuming this is in the SPI file system somewhere in linux? Can you help clarify where I can find this file?

2. I have enabled Linux driver support for this driver and rebuilt the kernel. The problem is when I run the command cd /sys/bus/iio/driver. I don't see the IIO folder? How do I get this installed?

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