dmaengine: add Qualcomm BAM dma driver

Add the DMA engine driver for the QCOM Bus Access Manager (BAM) DMA controller
found in the MSM 8x74 platforms.

Each BAM DMA device is associated with a specific on-chip peripheral.  Each
channel provides a uni-directional data transfer engine that is capable of
transferring data between the peripheral and system memory (System mode), or
between two peripherals (BAM2BAM).

The initial release of this driver only supports slave transfers between
peripherals and system memory.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Tested-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 9bed1a2a67a1..bcdacc73b6a9 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -400,4 +400,13 @@ config DMATEST
 config DMA_ENGINE_RAID
         bool
 
+config QCOM_BAM_DMA
+        tristate "QCOM BAM DMA support"
+        depends on ARCH_QCOM || (COMPILE_TEST && OF && ARM)
+        select DMA_ENGINE
+        select DMA_VIRTUAL_CHANNELS
+        ---help---
+          Enable support for the QCOM BAM DMA controller.  This controller
+          provides DMA capabilities for a variety of on-chip devices.
+
 endif