From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] serial ifdef mess
Date: Tue, 20 Sep 2011 09:29:49 +0200 [thread overview]
Message-ID: <20110920072949.A3BD51407969@gemini.denx.de> (raw)
In-Reply-To: <CAPnjgZ0hSsbvAH_5EEDBn5R92mPJCibOi-iWBz=neL8GVVwXFA@mail.gmail.com>
Dear Simon Glass,
In message <CAPnjgZ0hSsbvAH_5EEDBn5R92mPJCibOi-iWBz=neL8GVVwXFA@mail.gmail.com> you wrote:
>
> Do we really want this? Is the code overhead of SERIAL_MULTI so bad
> that people insist on not defining it? If so, can we reduce that code
I have not seen a single case yet where the overhead was a problem.
It was always only the effort to change the code and re-test. For any
new boards this is a non-issue.
> Prior to relocation there is a single console UART. I wonder whether
> it would be acceptable to buffer all output until after relocation?
Strict no here.
> Serial init is the one peripheral still needed prior to reloc. At
> least this could be the default option, with something like
> CONFIG_EARLY_UART defined to revert to current behavior for debugging
> reasons.
That would just add complexity.
> Slightly more radical: just move the U-Boot banner, etc. into
> board_init_r. What could possible go wrong?
Serial output is an important debug tool during board bringup. I want
to have serial output as soon as possible. This is one of the
fundamental principles of U-Boot design I will not give up easily.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Never put off until tomorrow what you can put off indefinitely.
next prev parent reply other threads:[~2011-09-20 7:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-18 5:17 [U-Boot] [PATCH] punt unused clean/distclean targets Mike Frysinger
2011-09-18 7:26 ` Wolfgang Denk
2011-09-18 8:22 ` Mike Frysinger
2011-09-18 13:08 ` Graeme Russ
2011-09-19 4:59 ` Mike Frysinger
2011-09-19 5:10 ` Marek Vasut
2011-09-19 5:30 ` Mike Frysinger
2011-09-19 6:57 ` Wolfgang Denk
2011-09-19 5:11 ` Graeme Russ
2011-09-19 5:32 ` Mike Frysinger
2011-09-19 6:54 ` Wolfgang Denk
2011-09-19 14:28 ` Mike Frysinger
2011-09-19 18:29 ` Scott Wood
2011-09-19 20:57 ` [U-Boot] serial ifdef mess Mike Frysinger
2011-09-20 0:41 ` Graeme Russ
2011-09-20 0:52 ` Mike Frysinger
2011-09-20 1:07 ` Graeme Russ
2011-09-20 4:28 ` Simon Glass
2011-09-20 4:44 ` Mike Frysinger
2011-09-20 5:12 ` Graeme Russ
2011-09-20 7:29 ` Wolfgang Denk [this message]
2011-09-20 4:40 ` Mike Frysinger
2011-10-13 16:54 ` [U-Boot] [PATCH v2] punt unused clean/distclean targets Mike Frysinger
2011-10-15 20:20 ` Wolfgang Denk
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