On Wed, Apr 29, 2015 at 08:44:08AM -0500, Suravee Suthikulpanit wrote: > From ACPIv6 (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 arm and arm64 Kconfig to specify such requirement. > > Note that when _CCA is required, if it is missing in the DSDT. ACPI driver > will default to setting up devices as non-coherent. > > Signed-off-by: Mark Salter <msalter@xxxxxxxxxx> > Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> > --- > arch/arm/Kconfig | 1 + > arch/arm64/Kconfig | 1 + > drivers/acpi/Kconfig | 3 +++ > 3 files changed, 5 insertions(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 45df48b..2a0d036 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -1,6 +1,7 @@ > config ARM > bool > default y > + select ACPI_MUST_HAVE_CCA if ACPI > select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE > select ARCH_HAS_ELF_RANDOMIZE > select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST Any plans for ACPI on 32-bit ARM? -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
