From: Heiko Schocher <hs@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v1 0/2] usb: dfu: am335x: allow dfu in fullspeed mode only
Date: Tue, 09 Sep 2014 16:22:24 +0200 [thread overview]
Message-ID: <540F0D20.6050504@denx.de> (raw)
In-Reply-To: <20140909154309.6609949a@amdc2363>
Hello Lukasz,
Am 09.09.2014 15:43, schrieb Lukasz Majewski:
> Hi Heiko,
>
>> This patchserie adds the new config option CONFIG_DFU_FULLSPEED.
>
> Is there any special reason to support Full Speed (12 Mbit/sec - USB
> 1.1) and not rely solely on the High Speed (USB 2.0) as we do now?
>
>> If this is enabled DFU uses fullspeed only. This is used on the
>> siemens boards.
>
> Is there any DFU problem with the mentioned Siemens board, that we must
> use USB 1.1?
>
> I'd also appreciate more verbose rationale for this patch series - why
> this change is needed? What is the expected improvement?
They have a "USB HW protection circuit" and therefore they only allowed
to use fullspeed ...
@Lukas Stockman: Maybe you could answer this better than me?
bye,
Heiko
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
next prev parent reply other threads:[~2014-09-09 14:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-09 12:37 [U-Boot] [PATCH v1 0/2] usb: dfu: am335x: allow dfu in fullspeed mode only Heiko Schocher
2014-09-09 12:37 ` [U-Boot] [PATCH v1 1/2] usb: dfu: add config option to use in dfu mode fullspeed only Heiko Schocher
2014-09-09 14:09 ` Bin Liu
2014-09-09 14:25 ` Lukasz Majewski
2014-09-09 14:37 ` Heiko Schocher
2014-09-09 14:42 ` Bin Liu
2014-09-10 6:10 ` Heiko Schocher
2014-09-09 12:37 ` [U-Boot] [PATCH v1 2/2] arm: am335x: siemens board use in DFU " Heiko Schocher
2014-09-09 13:43 ` [U-Boot] [PATCH v1 0/2] usb: dfu: am335x: allow dfu in fullspeed mode only Lukasz Majewski
2014-09-09 14:05 ` Bin Liu
2014-09-09 14:24 ` Lukasz Majewski
2014-09-09 14:22 ` Heiko Schocher [this message]
2014-09-10 5:46 ` Stockmann, Lukas
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