From c652dd15571e6c7df35ff30eeb8b3e2b7e6300ba Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 26 Feb 2019 13:43:15 +0200 Subject: [PATCH] x86: acpi: Add DMA descriptors for I2C1 on Intel Tangier 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 Reviewed-by: Bin Meng --- .../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 8cb6f64b3d..8b5b709045 100644 --- a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl +++ b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl @@ -222,6 +222,17 @@ Device (PCI0) { Return (STA_VISIBLE) } + + Name (RBUF, ResourceTemplate() + { + FixedDMA(0x0009, 0x0000, Width32bit, ) + FixedDMA(0x0008, 0x0001, Width32bit, ) + }) + + Method (_CRS, 0, NotSerialized) + { + Return (RBUF) + } } Device (I2C6)