From: Jim Lin <jilin@nvidia.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/3] ARM: Tegra: USB: Add driver support for Tegra30/Tegra114
Date: Fri, 3 May 2013 18:53:30 +0800 [thread overview]
Message-ID: <1367578411.1302.6.camel@jilin-desktop> (raw)
In-Reply-To: <5182BEAF.5090004@wwwdotorg.org>
On Fri, 2013-05-03 at 03:29 +0800, Stephen Warren wrote:
> On 04/29/2013 03:21 AM, Jim Lin wrote:
> > Tegra30 and Tegra114 are compatible except
> > 1. T30 takes 55 ms to finish Port Reset. T114 takes
> > 50 ms.
>
> Is that 55-vs-50 some aspect of the HW specification itself, or the
> overall result of multiple separate delays? I ask because the statement
> that one piece of HW differs from another only in a delay, especially
> where that delay is enormous in HW terms, seem very unusual.
50 ms comes from USB 2.0 specification for root port.
55 ms comes from T30 Technical Reference Manual.
Overall result of multiple separate delays.
--
nvpublic
next prev parent reply other threads:[~2013-05-03 10:53 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-29 9:21 [U-Boot] [PATCH 0/3] Tegra: USB: EHCI: add Tegra30 compatible support Jim Lin
2013-04-29 9:21 ` [U-Boot] [PATCH 1/3] ARM: Tegra: FDT: Add USB support for T20/T30/T114 Jim Lin
2013-05-02 19:10 ` Stephen Warren
2013-05-03 11:07 ` Jim Lin
2013-05-03 14:43 ` Stephen Warren
2013-05-03 11:48 ` Venu Byravarasu
2013-04-29 9:21 ` [U-Boot] [PATCH 2/3] ARM: Tegra: USB: Add driver support for Tegra30/Tegra114 Jim Lin
2013-04-29 23:46 ` Marek Vasut
2013-04-30 16:21 ` Tom Warren
2013-04-30 17:09 ` Marek Vasut
2013-04-30 17:20 ` Tom Rini
2013-05-01 16:16 ` Tom Warren
2013-05-01 16:45 ` Tom Rini
2013-05-01 19:33 ` Marek Vasut
2013-05-01 23:20 ` Tom Warren
2013-05-01 23:23 ` Tom Warren
2013-05-02 9:50 ` Jim Lin
2013-05-02 11:38 ` Marek Vasut
2013-05-02 15:38 ` Tom Warren
2013-05-02 19:29 ` Stephen Warren
2013-05-03 10:53 ` Jim Lin [this message]
2013-05-03 14:46 ` Stephen Warren
2013-04-29 9:21 ` [U-Boot] [PATCH 3/3] Tegra: Config: Enable Tegra30/Tegra114 USB function Jim Lin
2013-05-02 19:30 ` Stephen Warren
2013-05-03 15:02 ` [U-Boot] [PATCH 0/3] Tegra: USB: EHCI: add Tegra30 compatible support Stephen Warren
2013-05-08 16:11 ` Stephen Warren
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