am335x: ddr_defs: Update EMIF parameters
authorVaibhav Bedia <vaibhav.bedia@ti.com>
Fri, 20 Apr 2012 07:58:16 +0000 (13:28 +0530)
committerTom Rini <trini@ti.com>
Tue, 8 May 2012 18:40:39 +0000 (11:40 -0700)
commitd47e60cc66804583021451c17c6c4ca607c33a27
tree7b3e75b89f5fa12a110c4b768cdeaf0de76c3100
parent93c05158992ffb0e6ce68f5f8ee3ff691694db7b
am335x: ddr_defs: Update EMIF parameters

EMIF parameters are calculated based on the AC timing
parameters from the SDRAM datasheet and the DDR frequency.

Current values for these paramters in AM335x U-Boot code,
though reliable, are not fully optimal. The most optimal
settings can be derived based on the guidelines published
at [1]. A pre-computed set of values with the most optimum
settings for AM335x EVM and BeagleBone can be found at [2].

[1] http://processors.wiki.ti.com/index.php/AM335x_EMIF_Configuration_tips
[2] http://processors.wiki.ti.com/index.php/OMAP_and_Sitara_CCS_support#AM335x

Signed-off-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
arch/arm/include/asm/arch-ti81xx/ddr_defs.h