How to add spidev0.2 for HLK7688 module

There is one SPI controller for HLK7688 module.
Now, we want to connect two external hardware to this interface, already export spidev0.1 at /dev/*
want to add spidev0.2, so what to do for this.
Need help,thanks.
PS: without use devicetree.

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Are you targeting the ar71xx target?
Or why without device tree?