DRV8860: Multiple DRV8860 drivers on a single serial interface?

So the datasheet for DRV8860 states "DRV8860 devices can be daisy-chained together to use a single serial interface".  They say "CAN", do they also mean "MUST"?  Do they support a configuration that is familiar to SPI where datain, dataout, and clock are shared, but the latch signals are unique to each part?  We have a design that we are debugging that have the devices sharing the datain, dataout, and clock lines, but have discrete latch signals.  Is this configuration supported?  I suspect not.  I'm thinking that we will need to lift DIN/DOUT pins and chain the devices together.  I guess I'm just surprised that the datasheet would not state that multiple devices that share an interface MUST chain the DIN/DOUT.