atmel-xdma.txt

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 * Atmel Extensible Direct Memory Access Controller (XDMAC)
    2 
    3 * XDMA Controller
    4 Required properties:
    5 - compatible: Should be "atmel,sama5d4-dma", "microchip,sam9x60-dma" or
    6   "microchip,sama7g5-dma".
    7 - reg: Should contain DMA registers location and length.
    8 - interrupts: Should contain DMA interrupt.
    9 - #dma-cells: Must be <1>, used to represent the number of integer cells in
   10 the dmas property of client devices.
   11   - The 1st cell specifies the channel configuration register:
   12     - bit 13: SIF, source interface identifier, used to get the memory
   13     interface identifier,
   14     - bit 14: DIF, destination interface identifier, used to get the peripheral
   15     interface identifier,
   16     - bit 30-24: PERID, peripheral identifier.
   17 
   18 Example:
   19 
   20 dma1: dma-controller@f0004000 {
   21         compatible = "atmel,sama5d4-dma";
   22         reg = <0xf0004000 0x200>;
   23         interrupts = <50 4 0>;
   24         #dma-cells = <1>;
   25 };
   26 
   27 
   28 * DMA clients
   29 DMA clients connected to the Atmel XDMA controller must use the format
   30 described in the dma.txt file, using a one-cell specifier for each channel.
   31 The two cells in order are:
   32 1. A phandle pointing to the DMA controller.
   33 2. Channel configuration register. Configurable fields are:
   34     - bit 13: SIF, source interface identifier, used to get the memory
   35     interface identifier,
   36     - bit 14: DIF, destination interface identifier, used to get the peripheral
   37     interface identifier,
   38   - bit 30-24: PERID, peripheral identifier.
   39 
   40 Example:
   41 
   42 i2c2: i2c@f8024000 {
   43         compatible = "atmel,at91sam9x5-i2c";
   44         reg = <0xf8024000 0x4000>;
   45         interrupts = <34 4 6>;
   46         dmas = <&dma1
   47                 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
   48                  | AT91_XDMAC_DT_PERID(6))>,
   49                <&dma1
   50                 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
   51                 | AT91_XDMAC_DT_PERID(7))>;
   52         dma-names = "tx", "rx";
   53 };

Cache object: d5d9bb254ab87061ba94d42e5b087396

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/dma/atmel-xdma.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/dma/atmel-xdma.txt