| Date | Wed, 13 May 2020 12:36:56 +0100 | From | Mark Brown <> | Subject | Re: [PATCH 07/17] spi: dw: Add Tx/Rx finish wait methods to DMA |
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On Wed, May 13, 2020 at 02:35:55PM +0300, Serge Semin wrote: > On Fri, May 08, 2020 at 06:30:23PM +0100, Mark Brown wrote:
> > > + while (dw_spi_dma_tx_busy(dws) && retry--) > > > + ndelay(ns);
> > How deep can the FIFO be with this IP - could we end up ndelay()ing for > > non-trivial amounts of time?
> According to the DW APB SSI db it can be up to 256 transfer words. So the delay > should be trivial.
Yes, that should be fine. [unhandled content-type:application/pgp-signature] |