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 -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lu...@denx.de
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