MESA to AD5362

Dear all, 

I would like to interface custom hardware with AD5362 (8ch DAC), via SPI interface. Would that be possible and what would be the easiest to hook this up?
I see BSPI and SSI interface is available in HM2, but do not understand whether they support custom SPI protocols. 
How is this done in 7i77 and can one adapt it for custom hardware? 

Thank you! 
jakap

There is an example driver using the BSPI interface to A-D and D-A chips: 7i65.comp
This could be used as a guide to writing a AD5362 driver.