| From: |
| Sricharan R <r.sricharan@ti.com> |
| To: |
| <r.sricharan@ti.com>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-omap@vger.kernel.org>, <dmaengine@vger.kernel.org> |
| Subject: |
| [RFC PATCH 0/9] drivers: dma: Add support for dma-channel router |
| Date: |
| Fri, 7 Mar 2014 17:46:07 +0530 |
| Message-ID: |
| <1394194576-23741-1-git-send-email-r.sricharan@ti.com> |
| Cc: |
| <santosh.shilimkar@ti.com>, <rnayak@ti.com>, <nsekhar@ti.com>, <tony@atomide.com>, <linux@arm.linux.org.uk>, <vinod.koul@intel.com>, <dan.j.williams@intel.com>, <nm@ti.com> |
| Archive‑link: | |
Article |
In some SoCs the dma request lines from the peripherals are
routed to the dma-controller through a crossbar. With this the
dma controller's available request lines are shared between the
peripherals.
This adds support to register the crossbar router associated with
a dma-channel and let the dma-controller driver map/unmap
the peripheral dma crossbar line to dma-controller's request
line.
This is on top of Russell's OMAP dma engine rework series
http://www.spinics.net/lists/linux-omap/msg102969.html
Sricharan R (9):
drivers: dma: omap-dma: Avoid hard-coding of the dma-request channels
drivers: dma: of-dma: Add support for dma-request line routers
drivers: dma: omap-dma: Add a seperate xlate function to get router
data
drivers: omap-dma: Add crossbar line as a resource to omap_chan
structure
drivers: dma: Add dma crossbar driver
arm: dts: dra: Add dma crossbar node
arm: dts: dra: Add dma-request router phandle to dma-specs
arm: dra: Enable dma crossbar support on dra7xx
arm: dts: dra7: Change the total dma-req numbers to crossbar channels
.../devicetree/bindings/arm/omap/dma-crossbar.txt | 26 +++
arch/arm/boot/dts/dra7.dtsi | 47 +++--
arch/arm/configs/omap2plus_defconfig | 1 +
drivers/dma/Kconfig | 7 +
drivers/dma/Makefile | 1 +
drivers/dma/of-dma.c | 82 +++++++-
drivers/dma/omap-dma-xbar.c | 219 ++++++++++++++++++++
drivers/dma/omap-dma-xbar.h | 32 +++
drivers/dma/omap-dma.c | 72 ++++++-
include/linux/of_dma.h | 22 ++
10 files changed, 479 insertions(+), 30 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arm/omap/dma-crossbar.txt
create mode 100644 drivers/dma/omap-dma-xbar.c
create mode 100644 drivers/dma/omap-dma-xbar.h
--
1.7.9.5
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