From: Stephen Warren <swarren@wwwdotorg.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v4 1/1] tegra: usb: Fix device enumeration problem of USB1
Date: Wed, 20 Jun 2012 23:41:39 -0600 [thread overview]
Message-ID: <4FE2B413.1080008@wwwdotorg.org> (raw)
In-Reply-To: <4B9C9637D5087840A465BDCB251780E9E2D6EDA3E6@HKMAIL02.nvidia.com>
On 06/20/2012 09:24 PM, Jim Lin wrote:
> A known hardware issue of USB1 port where bit 1 (connect status
> change) of PORTSC register will be set after issuing Port Reset
> (like "usb reset" in u-boot command line).
> This will be treated as an error and stops later device enumeration.
>
> Therefore we clear that bit after Port Reset in order to proceed
> later device enumeration.
>
> Signed-off-by: Jim Lin <jilin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
next prev parent reply other threads:[~2012-06-21 5:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-21 3:24 [U-Boot] [PATCH v4 1/1] tegra: usb: Fix device enumeration problem of USB1 Jim Lin
2012-06-21 5:41 ` Stephen Warren [this message]
2012-06-21 10:16 ` Marek Vasut
2012-06-21 10:42 ` Jim Lin
2012-06-21 16:57 ` Marek Vasut
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