From: Detlev Zundel <dzu@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 3/3] i.MX28: Increase the delay after DRAM init
Date: Fri, 04 May 2012 11:16:21 +0200 [thread overview]
Message-ID: <m24nrw5msa.fsf@lamuella.denx.de> (raw)
In-Reply-To: <201205031734.53830.marex@denx.de> (Marek Vasut's message of "Thu, 3 May 2012 17:34:53 +0200")
Hi Marek,
> Dear Detlev Zundel,
>
>> Hi Marek,
>>
>> [...]
>>
>> >> Can you please comment on why we are waiting and why we are waiting
>> >> exactly this long? Can we maybe poll the needed time somehow?
>> >
>> > We need to wait for the CPU clock to stabilize.
>>
>> This would be a worthwhile comment in the code.
>>
>> > I think there is a bit for that that we can poll, indeed.
>>
>> And _that_ is even better ;)
>
> And I was wrong, there isn't ... I made a dip into the manual and there's
> nothing :/ So this patch will have to do
Ah, too bad. Then at least comment on how you derived the delay and
what parameters where used for this calculation.
Thanks
Detlev
--
... and I will continue to use a low-level language to indicate how
machines actually compute. Readers who only want to see algorithms
that are already packaged in a plug-in way, using a trendy language,
should buy other people's books.
-- Donald Knuth, Fascicle 1
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de
next prev parent reply other threads:[~2012-05-04 9:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-02 22:14 [U-Boot] [PATCH 1/3] Revert "i.MX28: Enable additional DRAM address bits" Marek Vasut
2012-05-02 22:14 ` [U-Boot] [PATCH 2/3] M28: Scan only first 512 MB of DRAM to avoid memory wraparound Marek Vasut
2012-05-02 22:14 ` [U-Boot] [PATCH 3/3] i.MX28: Increase the delay after DRAM init Marek Vasut
2012-05-02 22:55 ` Fabio Estevam
2012-05-02 23:27 ` Marek Vasut
2012-05-03 8:12 ` Detlev Zundel
2012-05-03 13:31 ` Marek Vasut
2012-05-03 14:27 ` Detlev Zundel
2012-05-03 14:39 ` Marek Vasut
2012-05-03 15:34 ` Marek Vasut
2012-05-04 9:16 ` Detlev Zundel [this message]
2012-05-03 8:11 ` [U-Boot] [PATCH 1/3] Revert "i.MX28: Enable additional DRAM address bits" Detlev Zundel
2012-05-03 13:36 ` Marek Vasut
2012-05-03 14:30 ` Detlev Zundel
2012-05-03 14:41 ` Marek Vasut
2012-05-04 9:15 ` Detlev Zundel
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