On Mon, Oct 23, 2017 at 11:13:23AM +0530, Kishon Vijay Abraham I wrote: > EPF devices use EPC devices which in turn use the actual platform device for > configuring the hardware. IMO the devices in one layer shouldn't have to > explicitly use devices in another layer other than using clearly defined API's. > Here platform_device is the bottom later, above which is epc_device and on top > is epf_device. > > The idea is just by doing the initial setup in the framework, the epf driver be > able to use APIs like dma_alloc_coherent using it's own *device* rather than > the EPC's "device". That's a little strange - normally we only call dma_map* routines on the actual physical bus devices.
