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/remoteproc/st-rproc.txt

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    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         };

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