[U-Boot] [PATCH v2 4/5] armv7/fsl-ls102xa: Workaround for DDR erratum A008514

Yao Yuan yao.yuan at freescale.com
Mon Nov 9 10:30:28 CET 2015


Hi york,

Is it for DDR4?
LS1021A doesn't use this file.

Best Regards,
Yuan Yao

> -----Original Message-----
> From: York Sun [mailto:yorksun at freescale.com]
> Sent: Friday, November 06, 2015 2:05 AM
> To: Yuan Yao-B46683 <yao.yuan at freescale.com>
> Cc: Wang Huan-B18965 <alison.wang at freescale.com>; u-boot at lists.denx.de
> Subject: Re: [PATCH v2 4/5] armv7/fsl-ls102xa: Workaround for DDR erratum
> A008514
> 
> 
> 
> On 11/05/2015 02:26 AM, Yuan Yao wrote:
> > This is a workaround for hardware erratum.
> > Write the value of 63b2_0002h to EDDRTQCFG will optimal the memory
> > controller performance.
> >
> > The value: 63b2_0002h comes from the hardware team.
> >
> > Signed-off-by: Yuan Yao <yao.yuan at freescale.com>
> > ---
> > Changes in v2:
> > Rewrite the commit message to explain why and what this patch does.
> > ---
> >  arch/arm/cpu/armv7/ls102xa/soc.c                  | 10 ++++++++++
> >  arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h |  2 +-
> >  2 files changed, 11 insertions(+), 1 deletion(-)
> 
> Workaround for A008514 is already implemented in DDR driver
> drivers/ddr/fsl/fsl_ddr_gen4.c. Please see if you can merge your workaround
> into it.
> 
> York



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