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

Brian Norris
2015-05-20T23:54:59Z

On Thu, Apr 30, 2015 at 08:34:36PM +0200, Marek Vasut wrote:
> 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.

Just noticed this. Yes, that would definitely be a better option!

Brian