linux-kernel - Re: [PATCH 01/38] ARM: ux500: Remove PrimeCell IDs from Nomadik I2C DT nodes

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Date:	Wed, 11 Sep 2013 09:17:17 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Olof Johansson <olof@...om.net>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	LinusW <linus.walleij@...aro.org>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 01/38] ARM: ux500: Remove PrimeCell IDs from Nomadik I2C
 DT nodes

On Tue, 10 Sep 2013, Olof Johansson wrote:

> [pruning out the iio list/people]
> 
> On Tue, Sep 10, 2013 at 8:30 AM, Lee Jones <lee.jones@...aro.org> wrote:
> >> On Tue, Sep 10, 2013 at 5:49 AM, Lee Jones <lee.jones@...aro.org> wrote:
> >> > Turns out that they're actually not required and the driver probes just
> >> > fine without them. The ID is incorrect at the moment anyway. They actually
> >> > currently specify the stn8815.
> >> >
> >> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> >>
> >> How did you test this patch? What hardware did you boot it on and with
> >> what config?
> >
> > Snowball, u8500_defconfig.
> >
> > Why? Don't you have the same result with yours?
> 
> I have a very weird experience with snowball right now. I noticed this
> yesterday when I decided to look at why multi_v7_defconfig doesn't
> boot on it:
> 
> * u8500_defconfig doesn't boot as a DT kernel, since the machine ID is
> still enabled. If I disable the machine ID, it doesn't boot.
> * Same for multi_v7_defconfig, since that is only DT: It doesn't boot.

I'm not entirely sure what you mean by this, as I have Snowball
booting as a Device Tree only platform:

  http://www.spinics.net/lists/kernel/msg1590759.html

The Machine ID should be all F's for DT I think.

> Unfortunately I can't get to my home network right now to double-check
> boot logs to see if this has changed behavior recently, I'll have to
> do that later today. It'd be interesting to hear if you have the same
> experience w.r.t. DT on u8500_defconfig though.

I just changed SNOWBALL's machine ID to 9999 and it still boots just
fine with DT (ATAGs boot hangs). So what did you do? Can you send me
a patch of what you did, so I might reproduce your build please?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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