From: Detlev Zundel <dzu@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] UEC PHY: Speed up initial PHY neg.
Date: Thu, 12 Aug 2010 14:58:47 +0200 [thread overview]
Message-ID: <m2iq3gxa0o.fsf@ohwell.denx.de> (raw)
In-Reply-To: <1281451009-26015-1-git-send-email-Joakim.Tjernlund@transmode.se> (Joakim Tjernlund's message of "Tue, 10 Aug 2010 16:36:49 +0200")
Hi Jocke,
> Instead of always performing an autoneg, check if the PHY
> already has a link and if it matches one of the requested
> modes. Initially only 100MbFD is optimized this way.
Isn't it about time that we think about _not_ stopping the ethernet
device after every transaction?
Why not initialize it for the first transfer and stop it once we boot a
kernel? For USB for example we do just that.
Sorry for not providing a concrete patch, but I felt it is worthwhile to
throw that thought into the discussion as it pops up more and more often
nowadays. For example usb-cdc which currently deregisters the network
device on the host side after _every_ transfer....
Cheers
Detlev
--
You live and learn
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DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de
next prev parent reply other threads:[~2010-08-12 12:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-10 14:36 [U-Boot] [PATCH] UEC PHY: Speed up initial PHY neg Joakim Tjernlund
2010-08-10 20:23 ` Mike Frysinger
2010-08-11 6:20 ` Joakim Tjernlund
2010-08-12 12:58 ` Detlev Zundel [this message]
2010-08-12 14:09 ` Joakim Tjernlund
2010-08-13 8:20 ` Detlev Zundel
2010-08-13 13:18 ` Joakim Tjernlund
2010-08-23 7:08 ` Ben Warren
2010-08-23 7:53 ` Joakim Tjernlund
2010-08-23 14:12 ` Ben Warren
2010-08-23 14:53 ` Joakim Tjernlund
2010-08-23 15:19 ` [U-Boot] Start/stop of network devices (was: Re: [PATCH] UEC PHY: Speed up initial PHY neg.) Detlev Zundel
2010-08-24 18:35 ` Joakim Tjernlund
2010-09-13 4:18 ` [U-Boot] [PATCH] UEC PHY: Speed up initial PHY neg Ben Warren
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