From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] ppc44x: config GPIOs for USB on canyonlands board
Date: Fri, 24 Sep 2010 19:43:40 +0200 [thread overview]
Message-ID: <20100924174340.500C4EC2339@gemini.denx.de> (raw)
In-Reply-To: <AANLkTin-rbM0NDqZmZKCYp45-m9S+3H_Fb7DwzzEHkUw@mail.gmail.com>
Dear Feng Kan,
In message <AANLkTin-rbM0NDqZmZKCYp45-m9S+3H_Fb7DwzzEHkUw@mail.gmail.com> you wrote:
>
> FKAN: Dear Wolfgang, is the symmetry needed here? If a user
> plan to use the usb, he will trigger the function. Otherwise, on
> a stop what value would we put it back to.
Design rules say:
Shall initialize only such peripherals used by U-Boot itself,
and must deinitialize them after use. Note that especially the
deinitialization is mandatory!
Isn't this GPI reset to the initial values part of the
deinitialization sequence?
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
The software required `Windows 95 or better', so I installed Linux.
next prev parent reply other threads:[~2010-09-24 17:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 14:21 [U-Boot] [PATCH] ppc44x: config GPIOs for USB on canyonlands board Rupjyoti Sarmah
2010-09-23 18:56 ` Wolfgang Denk
2010-09-24 11:36 ` Rupjyoti Sarmah
2010-09-24 17:26 ` Feng Kan
2010-09-24 17:43 ` Wolfgang Denk [this message]
2010-09-24 22:43 ` Feng Kan
2010-09-28 14:16 ` Detlev Zundel
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