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From: Hans de Goede <j.w.r.degoede@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] sunxi: Remove Orangepi PC RAM speed to 624 MHz
Date: Sun, 27 Dec 2015 12:24:28 +0100	[thread overview]
Message-ID: <567FCA6C.7030000@gmail.com> (raw)
In-Reply-To: <1450973295.21986.35.camel@hellion.org.uk>

Hi,

On 24-12-15 17:08, Ian Campbell wrote:
> On Wed, 2015-12-23 at 11:50 +0100, Hans de Goede wrote:
>> There are some reports of stability issues at 672 MHz, see:
>> http://linux-sunxi.org/Orange_Pi_PC#DRAM_clock_speed_limit
>
> Looks like only one (in that table at least)?

Correct, but another 7 out of 13 are only just reliable at
672 and fail one speed step higher, showing that the manufacturer
default of 672 is cutting it awfully close to the failure point,
this feels like the factory default is actually an overclocked
setting.

> And do we expect this
> data to remain in the wiki, I suppose so.

Ack.

> In any case, this...
>> So reduce the DRAM speed to 624MHz which seems to be reliable
>> everywhere.
>
> ...seems reasonable to me.
>
>> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>
> Acked-by: Ian Campbell <ijc@hellion.org.uk>

Thanks,

Hans

  reply	other threads:[~2015-12-27 11:24 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-23 10:50 [U-Boot] [PATCH] sunxi: Remove Orangepi PC RAM speed to 624 MHz Hans de Goede
2015-12-24 16:08 ` Ian Campbell
2015-12-27 11:24   ` Hans de Goede [this message]
2015-12-24 16:55 ` Peter Korsgaard

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