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From: Stefan Roese <sr@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] arm: mvebu: increase delay after setting ddr3 training patterns
Date: Wed, 15 Jul 2015 15:36:17 +0200	[thread overview]
Message-ID: <55A661D1.30802@denx.de> (raw)
In-Reply-To: <1436951539-9268-1-git-send-email-anton.schubert@gmx.de>

Hi Anton,

On 15.07.2015 11:12, Anton Schubert wrote:
> The mv78260 needs atleast 10ms after setting the ddr3 training patterns

s/atleast/at least

> or else the cpu will hang.

Is this documented somewhere? Or just a value from your experiments / tests?

> This patch increases said delay to 20ms just to be safe.
>
> Signed-off-by: Anton Schubert <anton.schubert@gmx.de>
> Cc: Stefan Roese <sr@denx.de>
> Cc: Luka Perkov <luka.perkov@sartura.hr>

In general I'm fine with this patch. But I noticed that this patch 
breaks booting on my AXP board. I then remembered another issue I has 
with timer functions in SPL on MVEBU (A38x). The timer functionality is 
not enabled at all at this early boot time. I'll send another patch 
shortly. Please give it a try and let me know if this works. And if you 
still need this delay increasing patch here.

Thank,
Stefan

  reply	other threads:[~2015-07-15 13:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-15  9:12 [U-Boot] [PATCH] arm: mvebu: increase delay after setting ddr3 training patterns Anton Schubert
2015-07-15 13:36 ` Stefan Roese [this message]
2015-07-15 14:47   ` Anton Schubert
2015-07-15 14:56     ` Luka Perkov
2015-07-15 15:00       ` Anton Schubert
2015-07-15 15:04         ` Luka Perkov
2015-07-15 15:10           ` Anton Schubert
2015-07-15 15:00       ` Stefan Roese
2015-07-18  8:27         ` Luka Perkov

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