From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Babic Date: Tue, 09 Sep 2014 15:14:41 +0200 Subject: [U-Boot] [PATCH] imx: ventana: base SPL MMDC calibration on width and size not board In-Reply-To: <1408602671-1191-1-git-send-email-tharvey@gateworks.com> References: <1408602671-1191-1-git-send-email-tharvey@gateworks.com> Message-ID: <540EFD41.7020406@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 > --- Applied to u-boot-imx, thanks ! Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de =====================================================================