Re: [PATCH 07/17] spi: dw: Add Tx/Rx finish wait methods to DMA
From: Mark Brown <broonie@kernel.org>
Date: 2020-05-13 11:37:01
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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:
quoted
quoted
+ while (dw_spi_dma_tx_busy(dws) && retry--) + ndelay(ns);
quoted
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.
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