On Fri, Mar 01, 2024 at 01:28:35PM -0600, Sam Protsenko wrote: > On Fri, Mar 1, 2024 at 5:55 AM Tudor Ambarus <tudor.ambarus@xxxxxxxxxx> wrote: > > Since the addition of the driver in 2009, the driver selects between DMA > > and polling mode depending on the transfer length - DMA mode for > > transfers bigger than the FIFO depth, polling mode otherwise. All > > versions of the IP support polling mode, make the dma properties not > > required. > AFAIU, the device tree has nothing to do with drivers, it's about > hardware description. Does making DMA properties not required here > mean that there are some HW out there which doesn't integrate DMA in > SPI blocks? Even if this change is ok (I'm not sure), the > argumentation doesn't look sound to me. I do remember there being some SoC which shipped a SPI controller in that configuration for some reason. Possibly one of the OEM ones rather than one in a Samsung SoC?
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