From: Tom Rini <trini@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/1 v2] omap3_beagle: Enabling UART3 first allows the Transmitter to be empty
Date: Wed, 27 Mar 2013 09:57:53 -0400 [thread overview]
Message-ID: <20130327135753.GO5711@bill-the-cat> (raw)
In-Reply-To: <CABxcv=k61Q_skLjvJk+WH7d7wJQLHAcJP-WNV-c9TN2M-95vnw@mail.gmail.com>
On Wed, Mar 27, 2013 at 10:29:00AM +0100, Javier Martinez Canillas wrote:
> On Wed, Mar 27, 2013 at 5:50 AM, Manfred Huber <man.huber@arcor.de> wrote:
> > Please test the Patch. It is very simple on a Beagleboard. I guess you
> > have flashed the actual SPL and u-boot and Beagleboard boots correctly.
> > Now press and hold 'User' button and connect power. SPL should hang.
> > You can see some symbols on the console from the ROM code.
> >
>
> Hi Manfred,
>
> I don't have access to my IGEP board right now but I'll test your
> patch as soon as posible.
>
> > Install the Patch, compile it and flash the NAND. Beagleboard still
> > boots correctly. Now press and hold 'User' button again and Beagleboard
> > should also boot correctly. The Patch works.
> >
> > I suspect the IGEP board has the same bug. If so, the Patch should work
> > on this board too and we don't need CONFIG_SYS_NS16550_BROKEN_TEMT
> > anymore.
> >
>
> I still think that we should keep CONFIG_SYS_NS16550_BROKEN_TEMT or
> something similar instead of just checking for CONFIG_OMAP34XX. Since
> we don't know if this problem is also present on other TI OMAP
> platforms (or any other platform). I would just change
> CONFIG_SYS_NS16550_BROKEN_TEMT semantics once is confirmed that this
> also fixes the issue on IGEP boards.
I'm attempting to see if this ROM bug is (a) known and (b) is or was
fixed at some point. Based on what I know (or at least think I know) of
how the ROM code lived for "OMAP3", given that you're seeing this on
beagle and igep, it's a valid assumption that OMAP34XX is buggy. The
question I have (and hope for resolution on) is if it's a problem on
am335x/omap4 or later as well. If I follow how to reproduce this issue
(and I think I do), assuming I can I'll setup an am335x platform in a
similar position.
> > If you don't want a patch for this bug please let me know. I will not
> > bother you again.
> >
>
> Thanks a lot for working on this. Some people work on mainline U-Boot
> on their free time (like myself) so it can take a few days until you
> get a response about a patch. Please be patient :-)
Yes, thanks for working this issue through, I also appreciate it!
--
Tom
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next prev parent reply other threads:[~2013-03-27 13:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-27 13:09 [U-Boot] Beagleboard: SPL hangs on serial init man.huber at arcor.de
2013-03-16 13:13 ` Manfred Huber
2013-03-19 14:49 ` Tom Rini
2013-03-19 23:52 ` Manfred Huber
2013-03-20 0:05 ` Javier Martinez Canillas
2013-03-20 1:27 ` Tom Rini
2013-03-20 23:09 ` Manfred Huber
2013-03-21 21:08 ` Javier Martinez Canillas
2013-03-23 10:11 ` Manfred Huber
2013-03-21 19:03 ` [U-Boot] [PATCH] omap3_beagle: Enable CONFIG_SYS_NS16550_BROKEN_TEMT Manfred Huber
2013-03-21 21:28 ` Javier Martinez Canillas
2013-03-21 22:21 ` Tom Rini
2013-03-21 22:28 ` Scott Wood
2013-03-25 22:02 ` [U-Boot] [PATCH 1/1 v2] omap3_beagle: Enabling UART3 first allows the Transmitter to be empty Manfred Huber
2013-03-27 4:50 ` Manfred Huber
2013-03-27 9:29 ` Javier Martinez Canillas
2013-03-27 13:57 ` Tom Rini [this message]
2013-03-28 5:55 ` Manfred Huber
2013-03-29 8:19 ` Manfred Huber
2013-03-28 15:21 ` Tom Rini
2013-03-27 13:37 ` Andreas Bießmann
2013-03-27 17:22 ` Javier Martinez Canillas
2013-03-28 6:06 ` Manfred Huber
2013-03-28 8:45 ` Andreas Bießmann
2013-03-28 9:11 ` Javier Martinez Canillas
2013-03-28 9:50 ` Andreas Bießmann
2013-03-28 15:21 ` Tom Rini
2013-03-29 8:33 ` Manfred Huber
2013-03-29 9:20 ` [U-Boot] [PATCH 1/1 v3] " Manfred Huber
2013-03-29 9:43 ` Albert ARIBAUD
2013-03-29 12:34 ` Tom Rini
2013-03-29 12:42 ` [U-Boot] [PATCH 1/1 v4] omap3_beagle: Flush UART3 xmit on enable if TEMT is broken Manfred Huber
2013-03-29 12:52 ` [U-Boot] [PATCH 1/1 v5] " Manfred Huber
2013-04-02 7:46 ` Javier Martinez Canillas
2013-04-02 8:59 ` Andreas Bießmann
2013-04-08 16:56 ` [U-Boot] [U-Boot, 1/1, " Tom Rini
2013-04-10 22:12 ` [U-Boot] [PATCH v1 1/1] omap3: Display MHz instead of mHz on the console Manfred Huber
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