[U-Boot] [PATCH 2/2] ARM: am33xx: Always inhibit init/refresh during DDR phy init

Tom Rini trini at konsulko.com
Fri Jul 22 15:42:26 CEST 2016


On Thu, Jul 21, 2016 at 04:28:32AM -0700, Russ Dill wrote:

> A couple of commits have modified the am33xx/am437x ddr2/ddr3
> initialization path to fix certain issues, but have had the side effect
> of causing L3 noc errors during initialization. The two commits are:
> 
> 69b918 "am33xx,ddr3: fix ddr3 sdram configuration"
> fc46ba "arm: am437x: Enable hardware leveling for EMIF"
> 
> The EMIF_REG_INITREF_DIS_MASK bit still needs to be set for all
> platforms. This delays initialization and refresh until a later stage.
> The 500us timer can be programmed for platforms that require it
> and for platforms that don't require it. It is currently hardcoded
> for 400MHz systems. For systems with a higher memory frequency
> this needs to be a larger value, and for systems with a lower
> memory frequency this can be a lower value. This can be
> considered a separate issue and corrected in a later commit.
> 
> Signed-off-by: Russ Dill <Russ.Dill at ti.com>

Reviewed-by: Tom Rini <trini at konsulko.com>

-- 
Tom
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