Hi Frieder, > Hi Lukasz, > > On 19.09.2018 00:42, Lukasz Majewski wrote: > > Dear All, > > > > Maybe I do jump a bit off topic here, but... > > > > I've read through the following thread: > > https://patchwork.ozlabs.org/patch/939885/ > > > > And it mentions some issues with reading AHB content (buffers) in > > fsl-quadspi.c driver discovered when new QuadSPI driver was > > developed. > > The only setup with two chips that is known to be problematic with > the new driver, is when both chips are connected to the same bus > (e.g. QSPIA) using separate chip selects. I'm using QSPI0 controller, with two memories connected to QSPI0_A and QSPI0_B lines. > > Does your board use this kind of setup, or are the two chips > connected two different buses (QSPIA and QSPIB)? > > Have you tested the new driver? It would be great to receive some > more feedback. I will check (test) this new driver. No problem. > > > I do have a setup with qspi0 having two SPI memories connected (2x16 > > MiB), and I'm wondering if anybody has some more info regarding: > > > > (What's more is that there is a bug in > > * the "IP Command Read" in the Vybrid.) found here: > > https://elixir.bootlin.com/linux/v4.19-rc4/source/drivers/mtd/spi-nor/fsl-quadspi.c#L671 > > > > I've googled for some errata or known issues for vybryd's QSPI IP > > block (vf610) but without luck so far ... > > Unfortunately I don't know the background for this comment. The comment was added by some Freescale employee when the driver was added to Linux (by Huang - CC'ed). > Is your > board using VF610? Yes, it uses vf610 (A5 + M4 cores). > Do you experience problems? I've already observed following issue: For the current QSPI ML driver (fsl-quadspi.c - 4.19-rc3) only half of the AHB buffer is valid. When I do read the whole one - I do see read data corruption (on UBI or raw memory). This was pointed out in the patch: https://patchwork.ozlabs.org/patch/675401/ Unfortunately, I did not found any info regarding this problem (in NXP's errata or other doc). I will check if this issue shows up on new patches. Thanks in advance for your help. > > Regards, > Frieder > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/ Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx
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