Intel Tangier SoC has a general purpose DMA which can serve to speed up communications on SPI and I2C serial buses.
Provide DMA descriptors to utilize this capability in the future.
Note, I2C6, which is available to user, has no DMA request lines connected.
Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- .../include/asm/arch-tangier/acpi/southcluster.asl | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl index e4d876ab78..1f940511a1 100644 --- a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl +++ b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl @@ -232,6 +232,17 @@ Device (PCI0) { Return (STA_VISIBLE) } + + Name (RBUF, ResourceTemplate() + { + FixedDMA(0x0009, 0x0000, Width32bit, ) + FixedDMA(0x0008, 0x0001, Width32bit, ) + }) + + Method (_CRS, 0, NotSerialized) + { + Return (RBUF) + } }
Device (I2C6)