dmaengine: Driver for Topcliff PCH DMA controller

Topcliff PCH is the platform controller hub that is going to
be used in Intel's upcoming general embedded platforms. This
adds the driver for Topcliff PCH DMA controller. The DMA
channels are strictly for device to host or host to device
transfers and cannot be used for generic memcpy.

Signed-off-by: Yong Wang <yong.y.wang@intel.com>
[kill GFP_ATOMIC, kill __raw_{read|write}l, locking fixlet]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 6a3e5bfa6742..fed57634b6c1 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -188,6 +188,13 @@ config PL330_DMA
           You need to provide platform specific settings via
           platform_data for a dma-pl330 device.
 
+config PCH_DMA
+        tristate "Topcliff PCH DMA support"
+        depends on PCI && X86
+        select DMA_ENGINE
+        help
+          Enable support for the Topcliff PCH DMA engine.
+
 config DMA_ENGINE
         bool