Kernel-4.18.0-80.el8_st-rproc

STMicroelectronics Co-Processor Bindings

This binding provides support for adjunct processors found on ST SoCs.

Co-processors can be controlled from the bootloader or the primary OS. If
the bootloader starts a co-processor, the primary OS must detect its state
and act accordingly.

Required properties:

• compatible Should be one of:

            "st,st231-rproc"
            "st,st40-rproc"
  

• memory-region Reserved memory (See: ../reserved-memory/reserved-memory.txt)
• resets Reset lines (See: ../reset/reset.txt)
• reset-names Must be “sw_reset” and “pwr_reset”
• clocks Clock for co-processor (See: ../clock/clock-bindings.txt)
• clock-frequency Clock frequency to set co-processor at if the bootloader

        hasn't already done so
  

• st,syscfg System configuration register which holds the boot vector

        for the co-processor
            1st cell: Phandle to syscon block
            2nd cell: Boot vector register offset
  

Example:

audio_reserved: rproc@42000000 {
    compatible = "shared-dma-pool";
    reg = <0x42000000 0x01000000>;
    no-map;
};

st231-audio {
    compatible    = "st,st231-rproc";
    memory-region    = <&audio_reserved>;
    resets        = <&softreset STIH407_ST231_AUD_SOFTRESET>;
    reset-names    = "sw_reset";
    clocks        = <&clk_s_c0_flexgen CLK_ST231_AUD_0>;
    clock-frequency    = <600000000>;
    st,syscfg    = <&syscfg_core 0x228>;
};