[RFC PATCH 0/3] Fix iMX6 DDR configuration issues and update toradex apalis-imx6

[Francesco Dolcini]

Dear all,
we do recently have debugged some spurious boot failures and crashes, about 2%
of times on specific "bad" modules", on the toradex apalis imx6 [0].

We found a couple of issues in the generic imx6 ddr configuration code and we
updated the apalis-imx6 memory timing to fix those. With the following patches
applied we were able to run a complete validation cycle (weeks of testing for
multiple SKUs) over the whole industrial temperature range (-40
to +85) without any issues.

I'm sending this patch as RFC since we plan to run some additional validation
testing SKUs from different batches before asking for this to be merged.

[0] https://lore.kernel.org/all/20211202161428.GA104937@francesco-nb.int.toradex.com/

Francesco Dolcini (3):
  mx6: ddr: Restore ralat/walat in write level calibration
  mx6: ddr: Wait before issuing the first MRS cmd
  board: apalis_imx6: DDR init using mx6_dram_cfg()

 arch/arm/mach-imx/mx6/ddr.c             |  10 +-
 board/toradex/apalis_imx6/apalis_imx6.c | 439 ++++++++++--------------
 2 files changed, 193 insertions(+), 256 deletions(-)

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2.25.1