From: Stefano Babic <sbabic@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] imx: ventana: base SPL MMDC calibration on width and size not board
Date: Tue, 09 Sep 2014 15:14:41 +0200 [thread overview]
Message-ID: <540EFD41.7020406@denx.de> (raw)
In-Reply-To: <1408602671-1191-1-git-send-email-tharvey@gateworks.com>
On 21/08/2014 08:31, Tim Harvey wrote:
> The IMX6 MMDC calibration registers depend on propagation delay and capacitive
> loading between the SoC's MMDC and the DDR3 chips. On the Ventana boards the
> board layout varies little in trace-lengths such that propagation delays are
> irrelevant thus we can simply things by using calibration values obtained
> from various board layouts based on a common SoC and DDR chip configuration.
>
> This eliminates board-model from being needed allowing more flexibility. These
> values were tested on a large sample size of Gateworks Ventana boards ranging
> in layout, and memory configuration over the entire temperature range supported.
>
> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
> ---
Applied to u-boot-imx, thanks !
Best regards,
Stefano Babic
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prev parent reply other threads:[~2014-09-09 13:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-21 6:31 [U-Boot] [PATCH] imx: ventana: base SPL MMDC calibration on width and size not board Tim Harvey
2014-09-09 13:14 ` Stefano Babic [this message]
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