Kernel-3.10.0-957.el7_fsl-mxs-dma

  • Freescale MXS DMA

Required properties:

  • compatible : Should be “fsl,-dma-apbh” or “fsl,-dma-apbx”
  • reg : Should contain registers location and length
  • interrupts : Should contain the interrupt numbers of DMA channels.
    If a channel is empty/reserved, 0 should be filled in place.
  • #dma-cells : Must be <1>. The number cell specifies the channel ID.
  • dma-channels : Number of channels supported by the DMA controller

Optional properties:

  • interrupt-names : Name of DMA channel interrupts

Supported chips:
imx23, imx28.

Examples:

dma_apbh: dma-apbh@80004000 {
compatible = “fsl,imx28-dma-apbh”;
reg = <0x80004000 0x2000>;
interrupts = <82 83 84 85
88 88 88 88
88 88 88 88
87 86 0 0>;
interrupt-names = “ssp0”, “ssp1”, “ssp2”, “ssp3”,
“gpmi0”, “gmpi1”, “gpmi2”, “gmpi3”,
“gpmi4”, “gmpi5”, “gpmi6”, “gmpi7”,
“hsadc”, “lcdif”, “empty”, “empty”;
#dma-cells = <1>;
dma-channels = <16>;
};

dma_apbx: dma-apbx@80024000 {
compatible = “fsl,imx28-dma-apbx”;
reg = <0x80024000 0x2000>;
interrupts = <78 79 66 0
80 81 68 69
70 71 72 73
74 75 76 77>;
interrupt-names = “auart4-rx”, “aurat4-tx”, “spdif-tx”, “empty”,
“saif0”, “saif1”, “i2c0”, “i2c1”,
“auart0-rx”, “auart0-tx”, “auart1-rx”, “auart1-tx”,
“auart2-rx”, “auart2-tx”, “auart3-rx”, “auart3-tx”;
#dma-cells = <1>;
dma-channels = <16>;
};

DMA clients connected to the MXS DMA controller must use the format
described in the dma.txt file.

Examples:

auart0: serial@8006a000 {
compatible = “fsl,imx28-auart”, “fsl,imx23-auart”;
reg = <0x8006a000 0x2000>;
interrupts = <112>;
dmas = <&dma_apbx 8>, <&dma_apbx 9>;
dma-names = “rx”, “tx”;
};