[PATCH V2 0/2] dmaengine: Support for IMG MDC

From: Andrew Bresticker
Date: Fri Nov 14 2014 - 17:00:12 EST


This series adds support for the IMG Multi-threaded DMA Controller (MDC)
which is found on IMG SoCs. Currently this driver only supports the
variant found on the MIPS-based Pistachio SoC.

The MDC supports slave and memory-to-memory transfers on up to 32 channels.
Requests from channels are handled by MDC threads. Thread assignments are
per-channel and are specified in the device-tree.

Tested on a platform based on the Pistachio SoC with additional patches.
Support for Pistachio will be submitted later. Slave DMA was tested
with the recently submitted IMG SPFI driver [1] and memory-to-memory
DMA was tested with the dmatest module.

Based on Vinod's slave-dma/next + Maxime's device_control and slave caps
cleanup series [2].

Changes from v1:
- addressed Arnd's review comments
- rebased on Maxime's dmaengine cleanups

[1] https://lkml.org/lkml/2014/11/12/763
[2] https://lkml.org/lkml/2014/10/28/1067

Andrew Bresticker (2):
dmaengine: Add binding document for IMG MDC
dmaengine: Add driver for IMG MDC

.../devicetree/bindings/dma/img-mdc-dma.txt | 57 ++
drivers/dma/Kconfig | 9 +
drivers/dma/Makefile | 1 +
drivers/dma/img-mdc-dma.c | 973 +++++++++++++++++++++
4 files changed, 1040 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/img-mdc-dma.txt
create mode 100644 drivers/dma/img-mdc-dma.c

--
2.1.0.rc2.206.gedb03e5

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