RE: [EXT] Re: [PATCH v6 0/2] spi: cadence-quadpsi: Add support for the Cadence QSPI controller

[Kuldeep Singh <kuldeep.singh@xxxxxxx>]

Hi Vignesh,

> -----Original Message-----
> From: Vignesh Raghavendra <vigneshr@xxxxxx>
> Sent: Thursday, January 23, 2020 1:17 PM
> To: Kuldeep Singh <kuldeep.singh@xxxxxxx>; Ramuthevar,Vadivel MuruganX
> <vadivel.muruganx.ramuthevar@xxxxxxxxxxxxxxx>; broonie@xxxxxxxxxx; linux-
> spi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Cc: robh+dt@xxxxxxxxxx; dan.carpenter@xxxxxxxxxx;
> cheol.yong.kim@xxxxxxxxx; qi-ming.wu@xxxxxxxxx
> Subject: Re: [EXT] Re: [PATCH v6 0/2] spi: cadence-quadpsi: Add support for
> the Cadence QSPI controller
> 
> Caution: EXT Email
> 
> On 23/01/20 12:54 pm, Kuldeep Singh wrote:
> > Hi Vignesh,
> >
> >> -----Original Message-----
> >> From: linux-kernel-owner@xxxxxxxxxxxxxxx <linux-kernel-
> >> owner@xxxxxxxxxxxxxxx> On Behalf Of Vignesh Raghavendra
> >> Sent: Wednesday, January 15, 2020 11:43 AM
> >> To: Ramuthevar,Vadivel MuruganX
> >> <vadivel.muruganx.ramuthevar@xxxxxxxxxxxxxxx>; broonie@xxxxxxxxxx;
> >> linux- spi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> >> Cc: robh+dt@xxxxxxxxxx; dan.carpenter@xxxxxxxxxx;
> >> cheol.yong.kim@xxxxxxxxx; qi-ming.wu@xxxxxxxxx
> >> Subject: [EXT] Re: [PATCH v6 0/2] spi: cadence-quadpsi: Add support
> >> for the Cadence QSPI controller
> >>
> >> Caution: EXT Email
> >>
> >> Hi,
> >>
> >> On 12/30/2019 1:11 PM, Ramuthevar,Vadivel MuruganX wrote:
> >>> Add support for the Cadence QSPI controller. This controller is
> >>> present in the Intel Lightning Mountain(LGM) SoCs, Altera and TI SoCs.
> >>> This driver has been tested on the Intel LGM SoCs.
> >>>
> >>> This driver does not support generic SPI and also the implementation
> >>> only supports spi-mem interface to replace the existing driver in
> >>> mtd/spi-nor/cadence-quadspi.c, the existing driver only support
> >>> SPI-NOR flash memory.
> >>>
> >>
> >>
> >>
> >> I am finally able to get spi-mem based cadence-quaspi driver working
> >> on TI platforms with DMA and DAC mode. I have also incorporated
> >> changes to disable DAC and autopolling for your intel SoC:
> >>
> >> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
> >> hub.co
> >> m%2Fr-
> >>
> vignesh%2Flinux%2Fcommits%2Fqspi&amp;data=02%7C01%7Ckuldeep.singh%
> >>
> 40nxp.com%7Ccbd14ac527ae4298a28808d7998219e6%7C686ea1d3bc2b4c6fa
> >>
> 92cd99c5c301635%7C0%7C0%7C637146656365872638&amp;sdata=jAR7lmry
> >> R9fdqF3e4A2dQzF0Q0fYxMvM7sNhx8lvoy0%3D&amp;reserved=0
> >>
> >> (Top two patches are of interest)
> >>
> >> I have tested both DAC and INDAC mode with s25fl flash and everything
> >> seems to be fine. Could you re test the driver on your SoC? Feel free
> >> to fold it into your series if everything works.
> >
> > Is JFFS2/UBIFS a valid use case here? And were you able to test the same?
> > I see few issues with Spansion flashes (s25fs) in framework and couldn’t
> make FS utilities run.
> > On the other hand, file systems on other flashes (ex: micron, mt25qu) are
> showing positive results.
> >
> 
> I did test with s25fl512s with UBIFS and did not see any issue. 

Thanks Vignesh for this confirmation.

>Could you try with latest linux master or linux next? There were couple of fixes in the last -rc
> related to spansion flashes?

Yes, I have already applied those patches and still facing this issue.
I am testing with s25fs512s and only able to make it work on 1bit mode and that too by skipping SFDP.
Basic read/write works on other modes but not FS utilities.
Could you please share any pointer to look into which direction. Thanks in advance.

Thanks
Kuldeep

> 
> [1]
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> 
> > Thanks
> > Kuldeep
> >
> >>
> >> Regards
> >> Vignesh
> >>
> >>
> >
> 
> --
> Regards
> Vignesh