[U-Boot] Commit "arm: kirkwood: configs: dreamplug: Convert to DM_SPI" breaks u-boot on Dreamplug

[Chris Packham]

Hi Leigh,

On Thu, Feb 28, 2019 at 7:24 AM Leigh Brown <leigh at solinno.co.uk> wrote:
>
> Hello,
>
> Vagrant Cascadian asked for people to test the version of u-boot
> packaged
> for Debian Buster.  I tested u-boot on my Dreamplug and found it was not
> working correctly.  I raised a bug for Debian[1] but I have also tested
> with the mainline version of u-boot and found the same issues.

Thanks for testing. We've been needing more people interested in
keeping Kirkwood going.

>
> This is the second issue that I found, and it causes u-boot to not
> detect
> the SPI flash on the system.  I bisected the issue to the following
> commit:
>
> commit 6aaf76beb131c2ff2b7184c2d63c2c63e5ab339c
> Author: Chris Packham <judge.packham at gmail.com>
> Date:   Wed Nov 21 22:22:23 2018 +1300
>
>      arm: kirkwood: configs: dreamplug: Convert to DM_SPI
>
>      Enable CONFIG_DM_SPI=y and CONFIG_DM_SPI_FLASH=y in the defconfig.
>
>      Signed-off-by: Chris Packham <judge.packham at gmail.com>
>      Reviewed-by: Stefan Roese <sr at denx.de>
>      Signed-off-by: Stefan Roese <sr at denx.de>
>
> The error manifests itself as follows:
>
> U-Boot 2019.01+dfsg-1 (Jan 15 2019 - 00:36:19 +0000)
> Marvell-DreamPlug
>
> SoC:   Kirkwood 88F6281_A1
> DRAM:  512 MiB
> Loading Environment from SPI Flash... Invalid bus 0 (err=-19)
> *** Warning - spi_flash_probe_bus_cs() failed, using default environment
>

I think this may be solved with a simple change to the DTS. I'll
include you on the CC list for a patch shortly. Could you please test
it on your hardware.

> A successful boot looks more like this:
>
> U-Boot 2016.11+dfsg1-4 (Mar 27 2017 - 18:39:51 +0000)
> Marvell-DreamPlug
>
> SoC:   Kirkwood 88F6281_A1
> SPI:   ready
> DRAM:  512 MiB
> WARNING: Caches not enabled
> SF: Detected MX25L1605D with page size 256 Bytes, erase size 64 KiB,
> total 2 MiB
>
> Unfortunately, I don't know where to start to diagnose the issue.  Could
> anyone provide any pointers?  Happy to test any suggestions.
>
> Regards,
>
> Leigh.
>
> --
> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=923379