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Subject: Re: [PATCH] powerpc/85xx: Fix P1020RDB boot hang due USB2
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From: Kumar Gala <galak@kernel.crashing.org>
In-Reply-To: <20100422154447.GA30785@oksana.dev.rtsoft.ru>
Date: Mon, 17 May 2010 10:55:47 -0500
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References: <20100422154447.GA30785@oksana.dev.rtsoft.ru>
To: Anton Vorontsov <avorontsov@mvista.com>
Cc: linuxppc-dev@ozlabs.org
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On Apr 22, 2010, at 10:44 AM, Anton Vorontsov wrote:

> Since USB2 is shared with local bus, either local bus or USB2
> should be disabled. By default U-Boot enables local bus, so we
> have to disable USB2, otherwise kernel hangs:
> 
> ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
> fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
> fsl-ehci fsl-ehci.0: irq 28, io base 0xffe22000
> fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 1 port detected
> fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller
> fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2
> <hangs here>
> 
> Note that U-Boot doesn't clear 'status' property when it enables
> USB2, so we have to comment out the whole node.
> 
> To enable USB2, one can issue
> 'setenv hwconfig usb2:dr_mode=<host|peripheral>' command at the
> U-Boot prompt.
> 
> Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
> ---
> arch/powerpc/boot/dts/p1020rdb.dts |    6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)

applied to next

- k