ARM: sunxi: mc-smp: Use DT enable-method for sun9i A80 SMP

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Instead of having an early init function check the machine compatible
and installing multi-cluster SMP support for the A80 if it matches,
use a new cpu enable-method string. This makes the platform support
future proof in case anyone manages to add PSCI support.

The original init code for the SMP support is changed into the
.prepare_cpus callback in the smp_operations structure. Instead of
panicing when resources are missing like on some platforms, our code
merely guards against engaging SMP or CPU hotplug and returns an error.

Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

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This commit is contained in:

Chen-Yu Tsai 2018-03-08 23:00:10 +08:00

parent c161daea99

commit 8591743f12

2 changed files with 21 additions and 1 deletions

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1

Documentation/devicetree/bindings/arm/cpus.txt

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21

arch/arm/mach-sunxi/mc_smp.c

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