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From: Remy Bohmer <linux@bohmer.net>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] ehci: speed up initialization
Date: Sat, 10 Dec 2011 17:29:11 +0100	[thread overview]
Message-ID: <CANqCtQKsYV=mbxHRDKYF2QoiF33V=LiiAPeDd1a6XsgVzR5=4g@mail.gmail.com> (raw)
In-Reply-To: <1323125542-6286-1-git-send-email-vpalatin@chromium.org>

Hi,

2011/12/5 Vincent Palatin <vpalatin@chromium.org>:
> According to EHCI specification v1.0, the controller should stabilize
> the power on a port at most 20 ms after the port power bit transition.
> So, we put this setting in the virtual descriptor corresponding field,
> (bPwrOn2PwrGood = 10 => 10 x 2ms = 20ms), this saves about 500ms at each
> controller initialization/enumeration.
>
> Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
> ---
> ?drivers/usb/host/ehci-hcd.c | ? ?2 +-
> ?1 files changed, 1 insertions(+), 1 deletions(-)

Applied to u-boot-usb.

Kind regards,

Remy

  reply	other threads:[~2011-12-10 16:29 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-05 22:52 [U-Boot] [PATCH] ehci: speed up initialization Vincent Palatin
2011-12-10 16:29 ` Remy Bohmer [this message]
2011-12-19 12:07   ` Wolfgang Grandegger
2011-12-19 12:51     ` Vincent Palatin
2011-12-19 13:31       ` Wolfgang Grandegger
2011-12-19 16:59         ` Remy Bohmer
2011-12-19 18:18           ` Vincent Palatin
2011-12-20 16:10           ` Wolfgang Grandegger
2011-12-19 15:32     ` Wolfgang Denk

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