Documentation/devicetree/bindings/remoteproc/st-rproc.txt

   1 STMicroelectronics Co-Processor Bindings
   2 ----------------------------------------
   3
   4 This binding provides support for adjunct processors found on ST SoCs.
   5
   6 Co-processors can be controlled from the bootloader or the primary OS. If
   7 the bootloader starts a co-processor, the primary OS must detect its state
   8 and act accordingly.
   9
  10 Required properties:
  11 - compatible            Should be one of:
  12                                 "st,st231-rproc"
  13                                 "st,st40-rproc"
  14 - memory-region         Reserved memory (See: ../reserved-memory/reserved-memory.txt)
  15 - resets                Reset lines (See: ../reset/reset.txt)
  16 - reset-names           Must be "sw_reset" and "pwr_reset"
  17 - clocks                Clock for co-processor (See: ../clock/clock-bindings.txt)
  18 - clock-frequency       Clock frequency to set co-processor at if the bootloader
  19                         hasn't already done so
  20 - st,syscfg             System configuration register which holds the boot vector
  21                         for the co-processor
  22                                 1st cell: Phandle to syscon block
  23                                 2nd cell: Boot vector register offset
  24
  25 Example:
  26
  27         audio_reserved: rproc@42000000 {
  28                 compatible = "shared-dma-pool";
  29                 reg = <0x42000000 0x01000000>;
  30                 no-map;
  31         };
  32
  33         st231-audio {
  34                 compatible      = "st,st231-rproc";
  35                 memory-region   = <&audio_reserved>;
  36                 resets          = <&softreset STIH407_ST231_AUD_SOFTRESET>;
  37                 reset-names     = "sw_reset";
  38                 clocks          = <&clk_s_c0_flexgen CLK_ST231_AUD_0>;
  39                 clock-frequency = <600000000>;
  40                 st,syscfg       = <&syscfg_core 0x228>;
  41         };