From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/2] console: Support board-specific early console
Date: Fri, 20 Mar 2015 17:55:50 +0100 [thread overview]
Message-ID: <20150320165550.31F8F380156@gemini.denx.de> (raw)
In-Reply-To: <1426851034-29393-1-git-send-email-thierry.reding@gmail.com>
Dear Thierry,
In message <1426851034-29393-1-git-send-email-thierry.reding@gmail.com> you wrote:
>
> This is mostly useful for debugging the early boot process. Often boards
> can provide some low-level code that outputs a character on some debug
> port prior to passing the early setup code. Allow boards to implement an
> early_putc() function that will be used to redirect printf() and friends
> to this debug port until the proper console becomes ready.
Hm... it is one of the basic design principles of U-Boot to provide
debug output on the console as soon as possible. It should be the
primary purpose of low level initialization to enable console output,
before anything else.
Now you say, you have output even before that - this aears to be a
contradiction to me. If you can output characters, then use this as
your console. I feel we should not need any special configuration
options to do what we should do anyway.
Or am I missing somthing?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
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
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als in einem kleinen - ein dummer Herrscher aber auch viel mehr Un-
fug. Da weise Herrscher seltener sind als dumme, war ich schon immer
gegen gro?e Reiche skeptisch. - Herbert Rosendorfer
next prev parent reply other threads:[~2015-03-20 16:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 11:30 [U-Boot] [PATCH 1/2] console: Support board-specific early console Thierry Reding
2015-03-20 11:30 ` [U-Boot] [PATCH 2/2] ARM: tegra: Implement early console support Thierry Reding
2015-03-20 15:24 ` [U-Boot] [PATCH 1/2] console: Support board-specific early console Tom Rini
2015-03-20 16:55 ` Wolfgang Denk [this message]
2015-03-23 23:38 ` Simon Glass
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