[U-Boot] [PATCH] ehci: speed up initialization

Remy Bohmer linux at bohmer.net
Sat Dec 10 17:29:11 CET 2011


Hi,

2011/12/5 Vincent Palatin <vpalatin at 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 at chromium.org>
> ---
>  drivers/usb/host/ehci-hcd.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)

Applied to u-boot-usb.

Kind regards,

Remy


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