STMicroelectronics Co-Processor Bindings
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This binding provides support for adjunct processors found on ST SoCs.
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Co-processors can be controlled from the bootloader or the primary OS. If
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the bootloader starts a co-processor, the primary OS must detect its state
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and act accordingly.
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Required properties:
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- compatible Should be one of:
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"st,st231-rproc"
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"st,st40-rproc"
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- memory-region Reserved memory (See: ../reserved-memory/reserved-memory.txt)
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- resets Reset lines (See: ../reset/reset.txt)
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- reset-names Must be "sw_reset" and "pwr_reset"
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- clocks Clock for co-processor (See: ../clock/clock-bindings.txt)
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- clock-frequency Clock frequency to set co-processor at if the bootloader
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hasn't already done so
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- st,syscfg System configuration register which holds the boot vector
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for the co-processor
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1st cell: Phandle to syscon block
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2nd cell: Boot vector register offset
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Example:
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audio_reserved: rproc@42000000 {
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compatible = "shared-dma-pool";
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reg = <0x42000000 0x01000000>;
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no-map;
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};
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st231-audio {
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compatible = "st,st231-rproc";
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memory-region = <&audio_reserved>;
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resets = <&softreset STIH407_ST231_AUD_SOFTRESET>;
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reset-names = "sw_reset";
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clocks = <&clk_s_c0_flexgen CLK_ST231_AUD_0>;
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clock-frequency = <600000000>;
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st,syscfg = <&syscfg_core 0x228>;
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};
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