powerpc: setup default archdata for {of_}platform via bus_register_notifier

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Since a number of powerpc chips are SoCs we end up having dma-able
devices that are registered as platform or of_platform devices.  We need
to hook the archdata to setup proper dma_ops for these devices.

Rather than having to add a bus_notify to each platform we add a default
one at the highest priority (called first) to set the default dma_ops for
of_platform and platform devices to dma_direct_ops.  This allows platform
code to override the ops by providing their own notifier call back.

In the future to enable >4G DMA support on ppc32 we can hook swiotlb ops.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Kumar Gala 2009-03-19 03:40:51 +00:00 • committed by Benjamin Herrenschmidt

parent 32ac57668d

commit d746286c1f

2 changed files with 36 additions and 13 deletions

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36

arch/powerpc/kernel/setup-common.c

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13

arch/powerpc/platforms/cell/qpace_setup.c

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