renesas,nbpfaxi.txt

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    1 * Renesas "Type-AXI" NBPFAXI* DMA controllers
    2 
    3 * DMA controller
    4 
    5 Required properties
    6 
    7 - compatible:   must be one of
    8                 "renesas,nbpfaxi64dmac1b4"
    9                 "renesas,nbpfaxi64dmac1b8"
   10                 "renesas,nbpfaxi64dmac1b16"
   11                 "renesas,nbpfaxi64dmac4b4"
   12                 "renesas,nbpfaxi64dmac4b8"
   13                 "renesas,nbpfaxi64dmac4b16"
   14                 "renesas,nbpfaxi64dmac8b4"
   15                 "renesas,nbpfaxi64dmac8b8"
   16                 "renesas,nbpfaxi64dmac8b16"
   17 - #dma-cells:   must be 2: the first integer is a terminal number, to which this
   18                 slave is connected, the second one is flags. Flags is a bitmask
   19                 with the following bits defined:
   20 
   21 #define NBPF_SLAVE_RQ_HIGH      1
   22 #define NBPF_SLAVE_RQ_LOW       2
   23 #define NBPF_SLAVE_RQ_LEVEL     4
   24 
   25 Optional properties:
   26 - max-burst-mem-read:   limit burst size for memory reads
   27   (DMA_MEM_TO_MEM/DMA_MEM_TO_DEV) to this value, specified in bytes, rather
   28   than using the maximum burst size allowed by the hardware's buffer size.
   29 - max-burst-mem-write:  limit burst size for memory writes
   30   (DMA_DEV_TO_MEM/DMA_MEM_TO_MEM) to this value, specified in bytes, rather
   31   than using the maximum burst size allowed by the hardware's buffer size.
   32   If both max-burst-mem-read and max-burst-mem-write are set, DMA_MEM_TO_MEM
   33   will use the lower value.
   34 
   35 You can use dma-channels and dma-requests as described in dma.txt, although they
   36 won't be used, this information is derived from the compatibility string.
   37 
   38 Example:
   39 
   40         dma: dma-controller@48000000 {
   41                 compatible = "renesas,nbpfaxi64dmac8b4";
   42                 reg = <0x48000000 0x400>;
   43                 interrupts = <0 12 0x4
   44                               0 13 0x4
   45                               0 14 0x4
   46                               0 15 0x4
   47                               0 16 0x4
   48                               0 17 0x4
   49                               0 18 0x4
   50                               0 19 0x4>;
   51                 #dma-cells = <2>;
   52                 dma-channels = <8>;
   53                 dma-requests = <8>;
   54         };
   55 
   56 * DMA client
   57 
   58 Required properties:
   59 
   60 dmas and dma-names are required, as described in dma.txt.
   61 
   62 Example:
   63 
   64 #include <dt-bindings/dma/nbpfaxi.h>
   65 
   66 ...
   67                 dmas = <&dma 0 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)
   68                         &dma 1 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)>;
   69                 dma-names = "rx", "tx";

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

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