1* Freescale MXS DMA 2 3Required properties: 4- compatible : Should be "fsl,<chip>-dma-apbh" or "fsl,<chip>-dma-apbx" 5- reg : Should contain registers location and length 6- interrupts : Should contain the interrupt numbers of DMA channels. 7 If a channel is empty/reserved, 0 should be filled in place. 8- #dma-cells : Must be <1>. The number cell specifies the channel ID. 9- dma-channels : Number of channels supported by the DMA controller 10 11Optional properties: 12- interrupt-names : Name of DMA channel interrupts 13 14Supported chips: 15imx23, imx28. 16 17Examples: 18 19dma_apbh: dma-apbh@80004000 { 20 compatible = "fsl,imx28-dma-apbh"; 21 reg = <0x80004000 0x2000>; 22 interrupts = <82 83 84 85 23 88 88 88 88 24 88 88 88 88 25 87 86 0 0>; 26 interrupt-names = "ssp0", "ssp1", "ssp2", "ssp3", 27 "gpmi0", "gmpi1", "gpmi2", "gmpi3", 28 "gpmi4", "gmpi5", "gpmi6", "gmpi7", 29 "hsadc", "lcdif", "empty", "empty"; 30 #dma-cells = <1>; 31 dma-channels = <16>; 32}; 33 34dma_apbx: dma-apbx@80024000 { 35 compatible = "fsl,imx28-dma-apbx"; 36 reg = <0x80024000 0x2000>; 37 interrupts = <78 79 66 0 38 80 81 68 69 39 70 71 72 73 40 74 75 76 77>; 41 interrupt-names = "auart4-rx", "auart4-tx", "spdif-tx", "empty", 42 "saif0", "saif1", "i2c0", "i2c1", 43 "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx", 44 "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx"; 45 #dma-cells = <1>; 46 dma-channels = <16>; 47}; 48 49DMA clients connected to the MXS DMA controller must use the format 50described in the dma.txt file. 51 52Examples: 53 54auart0: serial@8006a000 { 55 compatible = "fsl,imx28-auart", "fsl,imx23-auart"; 56 reg = <0x8006a000 0x2000>; 57 interrupts = <112>; 58 dmas = <&dma_apbx 8>, <&dma_apbx 9>; 59 dma-names = "rx", "tx"; 60}; 61