From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: imx: do not bring up unavailable cores
Date: Wed, 03 Apr 2013 08:01:02 -0500 [thread overview]
Message-ID: <515C280E.7000500@gmail.com> (raw)
In-Reply-To: <CAOMZO5C5uVDWi1vXTeyQF5P8N=ARHvW-qMknVeyG4zY85KcEkw@mail.gmail.com>
On 04/02/2013 10:18 PM, Fabio Estevam wrote:
> On Tue, Apr 2, 2013 at 11:47 PM, Shawn Guo <shawn.guo@linaro.org> wrote:
>
>> Ah, great. I haven't checked the U-Boot code for some time. But does
>> U-Boot remove cpu nodes of those unavailable cores from device tree
>> before passing it to kernel?
>
> No, it just uses the information from the SCU to print the name of the
> mx6 variant on boot.
It is quite common and the correct place IMHO to do this dtb fixup in
u-boot. You can just add 'status = "disabled";' properties. I'm not sure
that the kernel is checking the status though.
Reading the core count from the SCU is the only reason the SCU needs to
be statically mapped, so if you remove that you can remove the static
mapping.
Rob
next prev parent reply other threads:[~2013-04-03 13:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-02 14:32 [PATCH] ARM: imx: do not bring up unavailable cores Shawn Guo
2013-04-02 15:17 ` Will Deacon
2013-04-03 2:13 ` Shawn Guo
2013-04-03 2:38 ` Fabio Estevam
2013-04-03 2:47 ` Shawn Guo
2013-04-03 3:18 ` Fabio Estevam
2013-04-03 13:01 ` Rob Herring [this message]
2013-04-04 11:52 ` Shawn Guo
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