[U-Boot] [PATCH v2 0/3] ddr: vybrid: Support for vf610 built-in DDR3 memory calibration

[Lukasz Majewski]

Hi Fabio, Stefano,

> This patch series provides code to perform read leveling - RDLVL,
> which is adjusting the DQS strobe in relation to the DQ signals so
> that the strobe edge is centered in the window of valid read data.
> 
> The code is based on Vybrid's Reference Manual's:
> "VFxxx Controller Reference Manual, Rev. 0, 10/2016", page 1600,
> 10.1.6.16.4.1 "Software Read Leveling in MC Evaluation Mode"
> 
> and uses clarification provided by following NXP's community thread:
> "Vybrid: About DDR leveling feature on DDRMC."
> https://community.nxp.com/thread/395323
> 
> It depends on a BITMAP rework patch:
> usb: composite: Move bitmap related operations
> to ./include/linux/bitmap.h http://patchwork.ozlabs.org/patch/1006448/
> 

The above patch has found its way to main line, so there is no
obstacles to pull this code.

Moreover, some Stefan's patches:
[U-Boot,v1,0/4] ddr: vybrid: various fixes

http://patchwork.ozlabs.org/cover/1007547/

Are also related to DDR_MC setup on Vybrid and fix/cleanup some issues.

> 
> Changes in v2:
> - CR93_SWLVL_EXIT -> CR94_SWLVL_EXIT (EXIT is in CR94)
> - Add more defines to imx-regs.h (moved from *-calibration.h)
>  - CR93_SWLVL_EXIT -> CR94_SWLVL_EXIT (EXIT is in CR94)
>  - Update Kconfig information regarding DDRMC_VF610_CALIBRATION
>  - Update ddrmc-vf610-calibration. comment
>  - Update code after extending imx-regs.h
>  - Remove not needed #ifdef
> 
> Lukasz Majewski (3):
>   ddr: vybrid: Add DDRMC calibration related registers (DQS to DQ)
>   ddr: vybrid: Provide code to perform on-boot calibration
>   ddr: vybrid: Add calibration code to memory controler's (DDRMC)
> setup code
> 
>  arch/arm/include/asm/arch-vf610/imx-regs.h  |  14 +-
>  arch/arm/mach-imx/Kconfig                   |  12 +
>  arch/arm/mach-imx/Makefile                  |   1 +
>  arch/arm/mach-imx/ddrmc-vf610-calibration.c | 342
> ++++++++++++++++++++++++++++
> arch/arm/mach-imx/ddrmc-vf610-calibration.h |  45 ++++
> arch/arm/mach-imx/ddrmc-vf610.c             |   5 + 6 files changed,
> 418 insertions(+), 1 deletion(-) create mode 100644
> arch/arm/mach-imx/ddrmc-vf610-calibration.c create mode 100644
> arch/arm/mach-imx/ddrmc-vf610-calibration.h
> 




Best regards,

Lukasz Majewski

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