Re: DMA support for FlexSPI driver

[Han Xu <han.xu@xxxxxxx>]

On 22/12/19 09:21PM, Michael Walle wrote:
> [+ Frieder and Boris]
> 
> Hi,
> 
> Am 2022-12-19 21:09, schrieb Han Xu:
> > On 22/12/19 02:08PM, Fabio Estevam wrote:
> > > Hi,
> > > 
> > > Currently, there is no DMA support for the
> > > drivers/spi/spi-nxp-fspi.c driver.
> > > 
> > > Is there a technical reason that prevents DMA to be used on this
> > > driver with the i.MX8MM?
> > > 
> > > Also checked the NXP vendor driver, but DMA support is also missing.
> > > 
> > > Does anyone know more about the reason for this?
> 
> flexspi is a copy of the spi-fsl-qspi driver and I'd say the
> latter just got the basic operations polled IO or the memory
> mapped access and nobody cared :)
> 
> > We are working on that, both flexspi driver and sdma driver need to be
> > updated,
> > and will upstream all once done.
> 
> Are you also working on the DMA support for the layerscape
> architecture which is using eDMA?

Yes, we will update qspi driver as well, it's almost same as the fspi one. But
almost everyone is on vacation in these two weeks, it probably can be done as
early as in Jan.

> 
> -michael