Documentation/devicetree/bindings/remoteproc/ti,davinci-rproc.txt

   1 TI Davinci DSP devices
   2 =======================
   3
   4 The TI Davinci family of SoCs usually contains a TI DSP Core sub-system that
   5 is used to offload some of the processor-intensive tasks or algorithms, for
   6 achieving various system level goals.
   7
   8 The processor cores in the sub-system usually contain additional sub-modules
   9 like L1 and/or L2 caches/SRAMs, an Interrupt Controller, an external memory
  10 controller, a dedicated local power/sleep controller etc. The DSP processor
  11 core used in Davinci SoCs is usually a C674x DSP CPU.
  12
  13 DSP Device Node:
  14 ================
  15 Each DSP Core sub-system is represented as a single DT node.
  16
  17 Required properties:
  18 --------------------
  19 The following are the mandatory properties:
  20
  21 - compatible:           Should be one of the following,
  22                             "ti,da850-dsp" for DSPs on OMAP-L138 SoCs
  23
  24 - reg:                  Should contain an entry for each value in 'reg-names'.
  25                         Each entry should have the memory region's start address
  26                         and the size of the region, the representation matching
  27                         the parent node's '#address-cells' and '#size-cells' values.
  28
  29 - reg-names:            Should contain strings with the following names, each
  30                         representing a specific internal memory region or a
  31                         specific register space,
  32                              "l2sram", "l1pram", "l1dram", "host1cfg", "chipsig_base"
  33
  34 - interrupts:           Should contain the interrupt number used to receive the
  35                         interrupts from the DSP. The value should follow the
  36                         interrupt-specifier format as dictated by the
  37                         'interrupt-parent' node.
  38
  39 - memory-region:        phandle to the reserved memory node to be associated
  40                         with the remoteproc device. The reserved memory node
  41                         can be a CMA memory node, and should be defined as
  42                         per the bindings in
  43                         Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
  44
  45
  46 Example:
  47 --------
  48
  49         /* DSP Reserved Memory node */
  50         reserved-memory {
  51                 #address-cells = <1>;
  52                 #size-cells = <1>;
  53                 ranges;
  54
  55                 dsp_memory_region: dsp-memory@c3000000 {
  56                         compatible = "shared-dma-pool";
  57                         reg = <0xc3000000 0x1000000>;
  58                         reusable;
  59                 };
  60         };
  61
  62         /* DSP node */
  63         {
  64                 dsp: dsp@11800000 {
  65                         compatible = "ti,da850-dsp";
  66                         reg = <0x11800000 0x40000>,
  67                               <0x11e00000 0x8000>,
  68                               <0x11f00000 0x8000>,
  69                               <0x01c14044 0x4>,
  70                               <0x01c14174 0x8>;
  71                         reg-names = "l2sram", "l1pram", "l1dram", "host1cfg",
  72                                     "chipsig";
  73                         interrupt-parent = <&intc>;
  74                         interrupts = <28>;
  75                         memory-region = <&dsp_memory_region>;
  76                 };
  77         };