Urgent: how to subscribe SPI2 (OS is R71a)

Legacy Legacy AirPrime modules
1

for SPI11:

It’s successfult to subscribe SPI1 by:
SPI1Handle = adl_busSubscribe(ADL_BUS_ID_SPI, 1, &SPI1Config);

But it returns fali=ADL_RET_ERR_NOT_SUPPORTED if I subscribe SPI2 by
SPI2Handle = adl_busSubscribe(ADL_BUS_ID_SPI, 2, &SPI2Config);

I really cann’t find where is the explanation of SPI2 BlockID.

Much appreciate if anyone can help me.

-Jimmy