Re: [V4 PATCH 2/6] arm64 : Introduce support for ACPI _CCA object

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On 5/20/2015 5:03 AM, Catalin Marinas wrote:
On Fri, May 15, 2015 at 04:23:10PM -0500, Suravee Suthikulpanit wrote:
 From http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf,
section 6.2.17 _CCA states that ARM platforms require ACPI _CCA
object to be specified for DMA-cabpable devices. This patch introduces
ACPI_MUST_HAVE_CCA in arm64 Kconfig to specify such requirement.

In case _CCA is missing, arm64 would assign dummy_dma_ops
to disable DMA capability of the device.

Signed-off-by: Mark Salter <msalter@xxxxxxxxxx>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
CC: Catalin Marinas <catalin.marinas@xxxxxxx>
CC: Will Deacon <will.deacon@xxxxxxx>
CC: Arnd Bergmann <arnd@xxxxxxxx>

Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>


Thanks,

Suravee

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