Re: [PATCH 0/3] Using SPI NOR flah on sunxi.

From: Michal Suchanek
Date: Thu Apr 30 2015 - 12:57:10 EST

On 30 April 2015 at 18:30, <Thomas.Betker@xxxxxxxxxxxxxxxxx> wrote:
> Hello Michal:
>> I tried to connect a SPI NOR flash to my sunxi board and due to the
> current
>> sunxi SPI driver limitations it does not work.
>> The SPI driver returns an error when more than 64 bytes are
>> transferred at once
>> due to lack of DMA support.
> Wouldn't it be easier to fix the SPI driver to handle transfers larger
> than 64 bytes, filling and draining the FIFO multiple times if neccessary?
> (As far as I can tell, most SPI drivers do this.)

Yes, the intent is to fix this by adding dma support to the driver, eventually.

The patch might be still useful for other hardware with developing SPI support.


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