Re: [PATCH v3 8/9] spi: rockchip: modify DMA max burst to 1
From: Mark Brown
Date: Thu Sep 03 2015 - 08:55:03 EST
On Tue, Sep 01, 2015 at 05:58:44PM +0800, Shawn Lin wrote:
> Generic dma controller on Rockchips' platform cannot support
> DMAFLUSHP instruction which make dma to flush the req of non-aligned
> or non-multiple of what we need. That will cause an unrecoverable
> dma bus error. The saftest way is to set dma max burst to 1.
If this is a quirk of the DMA controller why is it being fixed with a
property specific to the SPI controller? Can't the DMA controller just
override the burst size?
> +#define ROCKCHIP_SPI_BORKEN_BURST_LEN (1<<0) /* broken burst len*/
This is misspelt.
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