Re: hang w/ppc6xx_defconfig related to 'simple-bus' compatible

Do you know what the CONFIG_ option is called for the legacy driver.

- k

On Aug 6, 2008, at 1:02 PM, Stephen Neuendorffer wrote:

The problem (in my case) is that the legacy-serial driver doesn't accept
all of the 16550 configurations accepted by the regular ns16550 driver.
The problem is not related to simple-bus, but only became visible when
simple-bus bindings are used because the legacy-serial driver
specifically looks for an ns16550 node contained by a simple-bus.

Most likely the hpcn_defconfig disables the legacy-serial driver
altogether.

Steve

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-----Original Message-----
From: <redacted>

[mailto:linuxppc-dev-

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bounces+stephen.neuendorffer=xilinx.com@ozlabs.org] On Behalf Of Scott

Wood

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Sent: Wednesday, August 06, 2008 10:36 AM
To: <redacted>
Cc: ppc-dev list
Subject: Re: hang w/ppc6xx_defconfig related to 'simple-bus'

compatible

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On Wed, Aug 06, 2008 at 07:41:28AM -0600, Grant Likely wrote:

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On Tue, Aug 05, 2008 at 08:21:31AM -0500, Kumar Gala wrote:

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I'm trying to get the ppc6xx_defconfig booting on any 8641

(74xx/e600)

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system.  If I remove the 'simple-bus' compatible from the soc node

in

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the .dts it works.  Otherwise it hangs at but and looks to be

crashed in

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the serial driver due to accessing memory at 0.

I've tried the same .dts (w/'simple-bus') using the
mpc8641_hpcn_defconfig and things work.

The Xilinx folks hit something similar.  ns16550 nodes get matched

if

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the parent claims simple-bus.  If extra stuff needs to be done to

use

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that port, then bad things happen.

If extra stuff needs to be done, it shouldn't claim to be a

simple-bus.

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-Scott
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