On Monday 20 January 2014, Srikanth Thokala wrote: > > > >> > * data width should be a property of the slave driver that is configured > >> > through dma_slave_config(), unless you can have dma engines that only > >> > support certain a width. > >> > >> Yes, this VDMA engine soft IP support only certain widths, which is > >> configurable during IP synthesis. > > > > But what is this property used for in that case? Surely you can't > > connect a slave device to a dmaengine if the bus width doesn't match. > > You probably have a point here, but I don't understand it yet. > > There is a Data-Realignment Engine (DRE) in the IP which is only available for > data width setting of 64-bits and less. So, we use the data-width DT parameter > to verify this condition and we update alignment shift accordingly. Ok, I have to admit I didn't understand all of that, but you clearly know what you are talking about here, so I assume you are correct. Arnd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
