ARM: shmobile: EMEV2 SMP DT reference code (once more!)

ARM: shmobile: EMEV2 SMP DT reference code (once more!)

[PATCH 01/02] ARM: shmobile: Temporarily use C to setup EMEV2 clocks [PATCH 02/02] ARM: shmobile: Temporarily use emev2_map_io() for SMP

This series is a small silly SMP DT reference implementation meant to give the other shmobile DT SMP platforms a kick in the butt.

None of the patches in the series should be merged as-is, but they can instead be used to boot EMEV2 using DT with SMP support.

I've used the following steps to build an uImage for the KZM9D board:

make -j9 ARCH=arm CROSS_COMPILE=_ uImage
./scripts/dtc/dtc -I dts -O dtb arch/arm/boot/dts/emev2-kzm9d.dts -o arch/arm/boot/dts/emev2-kzm9d.dtb rm arch/arm/boot/zImage arch/arm/boot/uImage
make -j9 ARCH=arm CROSS_COMPILE=_ zImage
cat arch/arm/boot/dts/emev2-kzm9d.dtb >> arch/arm/boot/zImage
$(cut -f 3- -d ' ' < arch/arm/boot/.uImage.cmd)

The above sequence works well for me and is obviously much better and easier than making use of any static mach-type number.

As for build configuration, use the following two on KZM9D DT-only:
CONFIG_ARCH_EMEV2=y
CONFIG_MACH_KZM9D=n

The current state of EMEV2 and KZM9D DT is that you can get serial ports and the STI timer running with DT-only. The GPIO bits still lack DT bindings. This means no ethernet, so initramfs is needed.

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Tested on top of renesas.git tag renesas-next-20130321

 arch/arm/mach-shmobile/setup-emev2.c |    3 +++
 1 file changed, 3 insertions(+)