Yes, spi@3230000 is for SPI1 which includes following SPI pins:
PY.00: SPI1_SCK
PY.01: SPI1_MISO
PY.02: SPI1_MOSI
PY.03: SPI1_CS0
PY.04: SPI1_CS1
You can configure them as following in pinmux spreadsheet.
To port TPM on Jetson, you can also refer to the following topics:
How to enable TPM - #5 by DaneLLL
How to enable TPM2.0 module in Xavier?
SPI TPM slb9670 isn't worked on Orin NX JetPack5