The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/dma/moxa,moxart-dma.txt

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    1 MOXA ART DMA Controller
    2 
    3 See dma.txt first
    4 
    5 Required properties:
    6 
    7 - compatible :  Must be "moxa,moxart-dma"
    8 - reg :         Should contain registers location and length
    9 - interrupts :  Should contain an interrupt-specifier for the sole
   10                 interrupt generated by the device
   11 - #dma-cells :  Should be 1, a single cell holding a line request number
   12 
   13 Example:
   14 
   15         dma: dma@90500000 {
   16                 compatible = "moxa,moxart-dma";
   17                 reg = <0x90500080 0x40>;
   18                 interrupts = <24 0>;
   19                 #dma-cells = <1>;
   20         };
   21 
   22 
   23 Clients:
   24 
   25 DMA clients connected to the MOXA ART DMA controller must use the format
   26 described in the dma.txt file, using a two-cell specifier for each channel:
   27 a phandle plus one integer cells.
   28 The two cells in order are:
   29 
   30 1. A phandle pointing to the DMA controller.
   31 2. Peripheral identifier for the hardware handshaking interface.
   32 
   33 Example:
   34 Use specific request line passing from dma
   35 For example, MMC request line is 5
   36 
   37         mmc: mmc@98e00000 {
   38                 compatible = "moxa,moxart-mmc";
   39                 reg = <0x98e00000 0x5C>;
   40                 interrupts = <5 0>;
   41                 clocks = <&clk_apb>;
   42                 dmas =  <&dma 5>,
   43                         <&dma 5>;
   44                 dma-names = "tx", "rx";
   45         };

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