1 Texas Instruments DMA Crossbar (DMA request router)
4 - compatible: "ti,dra7-dma-crossbar" for DRA7xx DMA crossbar
5 "ti,am335x-edma-crossbar" for AM335x and AM437x
6 - reg: Memory map for accessing module
7 - #dma-cells: Should be set to to match with the DMA controller's dma-cells
8 for ti,dra7-dma-crossbar and <3> for ti,am335x-edma-crossbar.
9 - dma-requests: Number of DMA requests the crossbar can receive
10 - dma-masters: phandle pointing to the DMA controller
12 The DMA controller node need to have the following poroperties:
13 - dma-requests: Number of DMA requests the controller can handle
16 - ti,dma-safe-map: Safe routing value for unused request lines
19 When requesting channel via ti,dra7-dma-crossbar, the DMA clinet must request
20 the DMA event number as crossbar ID (input to the DMA crossbar).
22 For ti,am335x-edma-crossbar: the meaning of parameters of dmas for clients:
23 dmas = <&edma_xbar 12 0 1>; where <12> is the DMA request number, <0> is the TC
24 the event should be assigned and <1> is the mux selection for in the crossbar.
25 When mux 0 is used the DMA channel can be requested directly from edma node.
30 sdma: dma-controller@4a056000 {
31 compatible = "ti,omap4430-sdma";
32 reg = <0x4a056000 0x1000>;
33 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
34 <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
35 <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
36 <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
43 sdma_xbar: dma-router@4a002b78 {
44 compatible = "ti,dra7-dma-crossbar";
45 reg = <0x4a002b78 0xfc>;
48 ti,dma-safe-map = <0>;
49 dma-masters = <&sdma>;
53 uart1: serial@4806a000 {
54 compatible = "ti,omap4-uart";
55 reg = <0x4806a000 0x100>;
56 interrupts-extended = <&gic GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
58 clock-frequency = <48000000>;
60 /* Requesting crossbar input 49 and 50 */
61 dmas = <&sdma_xbar 49>, <&sdma_xbar 50>;
62 dma-names = "tx", "rx";