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

Marek Vasut
2015-04-30T20:58:52Z

On Thursday, April 30, 2015 at 06:56:18 PM, Michal Suchanek wrote:
> On 30 April 2015 at 18:30, <Thomas.Betker@rohde-schwarz.com> 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.

Please just fix the controller driver to correctly handle arbitrary transfer
lengths.

Best regards,
Marek Vasut