linux-kernel - [PATCH V3 0/2] dmaengine: Support for IMG MDC

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Date:	Thu, 11 Dec 2014 14:59:15 -0800
From:	Andrew Bresticker <abrestic@...omium.org>
To:	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>
Cc:	Andrew Bresticker <abrestic@...omium.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	James Hartley <james.hartley@...tec.com>,
	James Hogan <james.hogan@...tec.com>,
	Ezequiel Garcia <ezequiel.garcia@...tec.com>,
	Damien Horsley <Damien.Horsley@...tec.com>,
	Arnd Bergmann <arnd@...db.de>, dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH V3 0/2] dmaengine: Support for IMG MDC

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/topic/slave_caps_device_control_fix.

Changes from v2:
 - addressed Vinod's review comments
Changes from v1:
 - addressed Arnd's review comments
 - rebased on Maxime's dmaengine cleanups

[1] https://lkml.org/lkml/2014/11/12/763

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                          | 1011 ++++++++++++++++++++
 4 files changed, 1078 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/img-mdc-dma.txt
 create mode 100644 drivers/dma/img-mdc-dma.c

-- 
2.2.0.rc0.207.ga3a616c

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