From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 3/3] M28: Disable USB power on boot
Date: Wed, 23 May 2012 15:08:11 +0200 [thread overview]
Message-ID: <201205231508.11693.marex@denx.de> (raw)
In-Reply-To: <CAOMZO5CQRzUEq=50V9niR3k4ZZqnuVFC6C5QHAbnk8LAsqK9uQ@mail.gmail.com>
Dear Fabio Estevam,
> On Wed, May 23, 2012 at 8:53 AM, Marek Vasut <marex@denx.de> wrote:
> > Dang, this must be related to bootrom somehow then. Fabio, can you
> > confirm the following:
> >
> > If you turn off the mx28 board, connect usb flashdisc, turn it on -- do
> > you see the flashdisc led blinking? Any idea what might cause it? This
> > patch forced the VBUS off, so very early in uboot, the USB flash has no
> > way to blink (unless there's some surge).
>
> I have just tried it on my mx28evk and I don't see the USB thumb LED to
> turn on.
>
> Only if I do a "usb reset" that it turns on. Doing a "usb stop" turns
> it off as expected.
>
> I would suggest you to compare your USB circuitry against mx28evk
> schematics.
Well, what can it be caused by? I disabled the VBUS, so how come it can still be
on. The usb circuitry maybe then?
> Regards,
>
> Fabio Estevam
Best regards,
Marek Vasut
next prev parent reply other threads:[~2012-05-23 13:08 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-22 23:32 [U-Boot] [PATCH 1/3] MX28: Add u-boot.mx28.sd and u-boot.mx28.nand make targets Marek Vasut
2012-05-22 23:32 ` [U-Boot] [PATCH 2/3] MX28: Cleanup mxsboot within make mrproper Marek Vasut
2012-05-22 23:32 ` [U-Boot] [PATCH 3/3] M28: Disable USB power on boot Marek Vasut
2012-05-23 11:14 ` Wolfgang Denk
2012-05-23 11:53 ` Marek Vasut
2012-05-23 12:48 ` Fabio Estevam
2012-05-23 13:08 ` Marek Vasut [this message]
2012-05-23 13:10 ` Fabio Estevam
2012-05-23 13:01 ` Fabio Estevam
2012-05-23 13:07 ` Marek Vasut
2012-05-23 13:15 ` Fabio Estevam
2012-05-23 13:20 ` Marek Vasut
2012-05-23 9:16 ` [U-Boot] [PATCH 1/3] MX28: Add u-boot.mx28.sd and u-boot.mx28.nand make targets Wolfgang Denk
2012-05-23 9:27 ` Marek Vasut
2012-05-23 9:44 ` Marek Vasut
2012-05-23 11:17 ` Wolfgang Denk
2012-05-23 11:34 ` Marek Vasut
2012-05-23 11:47 ` Wolfgang Denk
2012-05-23 12:22 ` Marek Vasut
2012-06-21 20:31 ` Wolfgang Denk
2012-06-22 12:44 ` Marek Vasut
2012-06-22 13:11 ` Wolfgang Denk
2012-05-23 11:16 ` Wolfgang Denk
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