On Wed, 2016-04-13 at 15:34 +0100, Bryan O'Donoghue wrote: > On Wed, 2016-04-13 at 15:03 +0300, Andy Shevchenko wrote: > > > > Because a probability of FIFO overrun. > > > > There is a big chapter ("Peripheral Burst Transaction Requests") in > > dw_apb_dmac_db.pdf covering this. > I thought there was flow control between the controller and the FIFO > here ? I don't have the spec SoC spec for the UART to hand but, if > memory serves... Wait, you mean flow control between DMA controller and UART FIFO, or I misread you? -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html