From: Tom Rini <trini@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] ARM: omap3: Implement dpll5 (HSUSB clk) workaround for OMAP36xx/AM/DM37xx according to errata sprz318e.
Date: Fri, 16 Aug 2013 09:35:41 -0400 [thread overview]
Message-ID: <20130816133541.GH13632@bill-the-cat> (raw)
In-Reply-To: <1373355797-28758-1-git-send-email-anaumann@ultratronik.de>
On Tue, Jul 09, 2013 at 09:43:17AM +0200, Naumann Andreas wrote:
> In chapter 'Advisory 2.1 USB Host Clock Drift Causes USB Spec
> Non-compliance in Certain Configurations' of the TI Errata it is
> recommended to use certain div/mult values for the DPLL5 clock setup.
> So far u-boot used the old 34xx values, so I added the errata
> recommended values specificly for 36xx init only. Also, the FSEL
> registers exist no longer, so removed them from init.
>
> Tested this on a AM3703 board with 19.2MHz oscillator, which
> previously couldnt lock the dpll5 (kernel complained). As a
> consequence the EHCI USB port wasnt usable in U-Boot and kernel. With
> this patch, kernel panics disappear and USB working fine in u-boot and
> kernel.
>
> Signed-off-by: Andreas Naumann <anaumann@ultratronik.de>
Applied to u-boot-ti/master with a prototype added to
<asm/arch-omap3/clock.h> to avoid a warning.
--
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20130816/6595c3bd/attachment.pgp>
prev parent reply other threads:[~2013-08-16 13:35 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-09 7:43 [U-Boot] [PATCH] ARM: omap3: Implement dpll5 (HSUSB clk) workaround for OMAP36xx/AM/DM37xx according to errata sprz318e Andreas Naumann
2013-08-15 2:53 ` [U-Boot] " Peter A. Bigot
2013-08-16 13:38 ` Tom Rini
2013-08-16 14:34 ` Peter A. Bigot
2013-08-16 15:07 ` Robert Nelson
2013-08-16 15:30 ` Robert Nelson
2013-08-20 8:50 ` Andreas Naumann
2013-08-20 9:45 ` Roger Quadros
2013-08-20 10:15 ` Andreas Naumann
2013-08-20 12:57 ` Robert Nelson
2013-08-16 13:35 ` Tom Rini [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130816133541.GH13632@bill-the-cat \
--to=trini@ti.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox