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81 lines
2.5 KiB
81 lines
2.5 KiB
* Freescale 85xx RAID Engine nodes |
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RAID Engine nodes are defined to describe on-chip RAID accelerators. Each RAID |
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Engine should have a separate node. |
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Supported chips: |
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P5020, P5040 |
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Required properties: |
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- compatible: Should contain "fsl,raideng-v1.0" as the value |
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This identifies RAID Engine block. 1 in 1.0 represents |
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major number whereas 0 represents minor number. The |
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version matches the hardware IP version. |
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- reg: offset and length of the register set for the device |
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- ranges: standard ranges property specifying the translation |
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between child address space and parent address space |
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Example: |
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/* P5020 */ |
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raideng: raideng@320000 { |
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compatible = "fsl,raideng-v1.0"; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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reg = <0x320000 0x10000>; |
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ranges = <0 0x320000 0x10000>; |
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}; |
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There must be a sub-node for each job queue present in RAID Engine |
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This node must be a sub-node of the main RAID Engine node |
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- compatible: Should contain "fsl,raideng-v1.0-job-queue" as the value |
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This identifies the job queue interface |
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- reg: offset and length of the register set for job queue |
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- ranges: standard ranges property specifying the translation |
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between child address space and parent address space |
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Example: |
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/* P5020 */ |
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raideng_jq0@1000 { |
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compatible = "fsl,raideng-v1.0-job-queue"; |
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reg = <0x1000 0x1000>; |
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ranges = <0x0 0x1000 0x1000>; |
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}; |
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There must be a sub-node for each job ring present in RAID Engine |
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This node must be a sub-node of job queue node |
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- compatible: Must contain "fsl,raideng-v1.0-job-ring" as the value |
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This identifies job ring. Should contain either |
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"fsl,raideng-v1.0-hp-ring" or "fsl,raideng-v1.0-lp-ring" |
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depending upon whether ring has high or low priority |
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- reg: offset and length of the register set for job ring |
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- interrupts: interrupt mapping for job ring IRQ |
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Optional property: |
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- fsl,liodn: Specifies the LIODN to be used for Job Ring. This |
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property is normally set by firmware. Value |
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is of 12-bits which is the LIODN number for this JR. |
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This property is used by the IOMMU (PAMU) to distinquish |
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transactions from this JR and than be able to do address |
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translation & protection accordingly. |
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Example: |
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/* P5020 */ |
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raideng_jq0@1000 { |
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compatible = "fsl,raideng-v1.0-job-queue"; |
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reg = <0x1000 0x1000>; |
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ranges = <0x0 0x1000 0x1000>; |
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raideng_jr0: jr@0 { |
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compatible = "fsl,raideng-v1.0-job-ring", "fsl,raideng-v1.0-hp-ring"; |
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reg = <0x0 0x400>; |
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interrupts = <139 2 0 0>; |
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interrupt-parent = <&mpic>; |
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fsl,liodn = <0x41>; |
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}; |
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};
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