linux-kernel - [PATCH 0/6] dmaengine/dra7x: DMA router (crossbar support)

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Message-ID: <1424787683-19151-1-git-send-email-peter.ujfalusi@ti.com>
Date:	Tue, 24 Feb 2015 16:21:17 +0200
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	<vinod.koul@...el.com>, Tony Lindgren <tony@...mide.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	<grant.likely@...aro.org>, <dmaengine@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <robh+dt@...nel.org>,
	<nm@...com>
Subject: [PATCH 0/6] dmaengine/dra7x: DMA router (crossbar support)

Hi,

The series adds support for DMA router type of devices. They are used in SoCs
which has more peripherals with DMA request lines than the DMA controller can
handle.
The router itself is not part of the DMA controller and it's operation should be
transparent (as it is in the HW) for the SW stack.

This series takes into accound the comments Sricharan received for his version
of the crossbar driver:
https://lkml.org/lkml/2014/3/7/199

This implementation is not tied to any DMA driver so it is possible to use the
framework by other vendors, also ACPI version of binding can be easy enough to
be added.

The omap-dma part of changes are based on the dma property name change series:
https://lkml.org/lkml/2015/2/20/182

but the code has fallback so it is working w/o the changes in that series.

Regards,
Peter
---
Peter Ujfalusi (6):
  dmaengine: of_dma: Support for DMA routers
  dmaengine: Add driver for TI DMA crossbar on DRA7x
  dmaengine: omap-dma: Use defines for dma channels and request count
  dmaengine: omap-dma: Take DMA request number from DT if it is
    available
  dmaengine: omap-dma: Remove mapping between virtual channels and
    requests
  ARM: DTS: dra7x: Integrate sDMA crossbar

 Documentation/devicetree/bindings/dma/dma.txt |  27 ++++
 arch/arm/boot/dts/dra7.dtsi                   |  57 ++++----
 drivers/dma/Kconfig                           |   4 +
 drivers/dma/Makefile                          |   1 +
 drivers/dma/dmaengine.c                       |   7 +
 drivers/dma/of-dma.c                          |  92 +++++++++++++
 drivers/dma/omap-dma.c                        |  24 +++-
 drivers/dma/ti-dma-crossbar.c                 | 191 ++++++++++++++++++++++++++
 include/linux/dmaengine.h                     |  17 +++
 include/linux/of_dma.h                        |  21 +++
 10 files changed, 413 insertions(+), 28 deletions(-)
 create mode 100644 drivers/dma/ti-dma-crossbar.c

-- 
2.3.0

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