TI Davinci DSP devices
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=======================
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Binding status: Unstable - Subject to changes for DT representation of clocks
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and resets
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The TI Davinci family of SoCs usually contains a TI DSP Core sub-system that
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is used to offload some of the processor-intensive tasks or algorithms, for
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achieving various system level goals.
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The processor cores in the sub-system usually contain additional sub-modules
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like L1 and/or L2 caches/SRAMs, an Interrupt Controller, an external memory
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controller, a dedicated local power/sleep controller etc. The DSP processor
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core used in Davinci SoCs is usually a C674x DSP CPU.
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DSP Device Node:
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================
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Each DSP Core sub-system is represented as a single DT node.
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Required properties:
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--------------------
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The following are the mandatory properties:
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- compatible: Should be one of the following,
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"ti,da850-dsp" for DSPs on OMAP-L138 SoCs
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- reg: Should contain an entry for each value in 'reg-names'.
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Each entry should have the memory region's start address
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and the size of the region, the representation matching
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the parent node's '#address-cells' and '#size-cells' values.
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- reg-names: Should contain strings with the following names, each
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representing a specific internal memory region or a
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specific register space,
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"l2sram", "l1pram", "l1dram", "host1cfg", "chipsig_base"
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- interrupts: Should contain the interrupt number used to receive the
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interrupts from the DSP. The value should follow the
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interrupt-specifier format as dictated by the
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'interrupt-parent' node.
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- memory-region: phandle to the reserved memory node to be associated
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with the remoteproc device. The reserved memory node
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can be a CMA memory node, and should be defined as
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per the bindings in
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Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
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Example:
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--------
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/* DSP Reserved Memory node */
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reserved-memory {
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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dsp_memory_region: dsp-memory@c3000000 {
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compatible = "shared-dma-pool";
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reg = <0xc3000000 0x1000000>;
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reusable;
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};
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};
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/* DSP node */
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{
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dsp: dsp@11800000 {
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compatible = "ti,da850-dsp";
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reg = <0x11800000 0x40000>,
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<0x11e00000 0x8000>,
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<0x11f00000 0x8000>,
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<0x01c14044 0x4>,
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<0x01c14174 0x8>;
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reg-names = "l2sram", "l1pram", "l1dram", "host1cfg",
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"chipsig";
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interrupt-parent = <&intc>;
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interrupts = <28>;
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memory-region = <&dsp_memory_region>;
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};
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};
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