AD9375 Example Xilinx Project error

Hello,

We are trying to bring up the example design for the 9375 (using the 2018_r2 adrv9371x project) on custom hardware. The design and example project are based on the Xilinx ZCU102. We have built the project in Vivado and set the constraints properly. We also tweaked the device tree and simply used the root file system and kernel from the example project. However, the 9371 probe fails with the following message:

[ 2.260827] ad9371 spi1.1: ad9371_probe : enter
[ 2.267736] ad9528 spi1.0: spi1.0 supply vcc not found, using dummy regulator
[ 2.284870] iio iio:device1: SPI Read Verify failed (0xFFFFFF)
[ 2.290582] ad9528: probe of spi1.0 failed with error -5

I've noted the discussion in https://ez.analog.com/linux-device-drivers/linux-software-drivers/f/q-a/102410/iio-device0-spi-read-verify-failed-0x0-problem-on-custom-carrier-and-ad9234-evaluation-board, but we have already reviewed the pin constraints. Any advice on how to approach debugging this would be appreciated!

Thanks,
Trent