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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
