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