[U-Boot] [RFC PATCH 0/9] ARM: imx: mx6: Add virtual mx6memcal board

[Eric Nelson <eric@nelint.com>]

This patch series adds a DDR calibration tool in the form of a
virtual i.MX6 board named "mx6memcal".

I was hoping to send this without the RFC, but found something that
needs some investigation in the process of cleanup (see ccgr_init in
patch 1) and would like to get it out so that others can experiment
and so I can get some additional feedback.

The board is added in patch 1.

The second patch is kept separate because I don't yet know why this
is needed. If the initial calibration is left as all zero, the 
calibration of the Nitrogen6_Max board will fail. Other boards don't
appear to have this problem.

The rest of the patches add configurations for use in testing.

Most of the boards are supported in main-line U-Boot, though I did
add the Nitrogen6_max board as a test of a 4GiB DDR arrangement.

The 'tr1x' board is a custom design that uses i.MX6SL and DDR3 that
I've been testing against and it works fine.

The mx6slevk and warp boards aren't currently supported because LPDDR2
isn't fully supported.

I did have them working in a local tree that pre-dated Marek's addition
of the calibration code into main-line:

    https://github.com/ericnelsonaz/u-boot/tree/memcal-pass1

Finally, as noted in the commit message, I saw some quirkiness with
a Wandboard Quad. For some reason, the dynamic calibration failed on
this platform when I selected 64-bit bus width and I haven't taken
time to investigate.

Eric Nelson (9):
  mx6: Add board mx6memcal for use in validating DDR
  mx6memcal: zero values for MPWRDLCTL cause read DQS calibration errors
  mx6memcal: add configuration for SABRE Lite
  mx6memcal: add configuration for Nitrogen6_max board
  mx6memcal: add configuration for tr1x board (i.MX6SL with DDR3)
  mx6memcal: add configuration for Wandboard Solo (512MiB of x32 DDR3)
  mx6memcal: add configuration for Wandboard Quad
  mx6memcal: add configuration for mx6slevk
  mx6memcal: add configuration for warp board (i.MX6SL)

 arch/arm/cpu/armv7/mx6/Kconfig             |   9 +
 board/freescale/mx6memcal/Kconfig          | 235 +++++++++++++++
 board/freescale/mx6memcal/MAINTAINERS      |   7 +
 board/freescale/mx6memcal/Makefile         |  13 +
 board/freescale/mx6memcal/README           |  49 +++
 board/freescale/mx6memcal/mx6memcal.c      |  32 ++
 board/freescale/mx6memcal/spl.c            | 462 +++++++++++++++++++++++++++++
 configs/mx6memcal_defconfig                |  32 ++
 configs/mx6memcal_mx6slevk_defconfig       |  37 +++
 configs/mx6memcal_nitrogen6_max_defconfig  |  33 +++
 configs/mx6memcal_sabrelite_defconfig      |  34 +++
 configs/mx6memcal_tr1x_defconfig           |  36 +++
 configs/mx6memcal_wandboard_quad_defconfig |  34 +++
 configs/mx6memcal_wandboard_solo_defconfig |  35 +++
 configs/mx6memcal_warpboard_defconfig      |  39 +++
 include/configs/mx6memcal.h                |  62 ++++
 scripts/config_whitelist.txt               |   5 +
 17 files changed, 1154 insertions(+)
 create mode 100644 board/freescale/mx6memcal/Kconfig
 create mode 100644 board/freescale/mx6memcal/MAINTAINERS
 create mode 100644 board/freescale/mx6memcal/Makefile
 create mode 100644 board/freescale/mx6memcal/README
 create mode 100644 board/freescale/mx6memcal/mx6memcal.c
 create mode 100644 board/freescale/mx6memcal/spl.c
 create mode 100644 configs/mx6memcal_defconfig
 create mode 100644 configs/mx6memcal_mx6slevk_defconfig
 create mode 100644 configs/mx6memcal_nitrogen6_max_defconfig
 create mode 100644 configs/mx6memcal_sabrelite_defconfig
 create mode 100644 configs/mx6memcal_tr1x_defconfig
 create mode 100644 configs/mx6memcal_wandboard_quad_defconfig
 create mode 100644 configs/mx6memcal_wandboard_solo_defconfig
 create mode 100644 configs/mx6memcal_warpboard_defconfig
 create mode 100644 include/configs/mx6memcal.h

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2.7.4