raideng.txt (2530B)
1* Freescale 85xx RAID Engine nodes 2 3RAID Engine nodes are defined to describe on-chip RAID accelerators. Each RAID 4Engine should have a separate node. 5 6Supported chips: 7P5020, P5040 8 9Required properties: 10 11- compatible: Should contain "fsl,raideng-v1.0" as the value 12 This identifies RAID Engine block. 1 in 1.0 represents 13 major number whereas 0 represents minor number. The 14 version matches the hardware IP version. 15- reg: offset and length of the register set for the device 16- ranges: standard ranges property specifying the translation 17 between child address space and parent address space 18 19Example: 20 /* P5020 */ 21 raideng: raideng@320000 { 22 compatible = "fsl,raideng-v1.0"; 23 #address-cells = <1>; 24 #size-cells = <1>; 25 reg = <0x320000 0x10000>; 26 ranges = <0 0x320000 0x10000>; 27 }; 28 29 30There must be a sub-node for each job queue present in RAID Engine 31This node must be a sub-node of the main RAID Engine node 32 33- compatible: Should contain "fsl,raideng-v1.0-job-queue" as the value 34 This identifies the job queue interface 35- reg: offset and length of the register set for job queue 36- ranges: standard ranges property specifying the translation 37 between child address space and parent address space 38 39Example: 40 /* P5020 */ 41 raideng_jq0@1000 { 42 compatible = "fsl,raideng-v1.0-job-queue"; 43 reg = <0x1000 0x1000>; 44 ranges = <0x0 0x1000 0x1000>; 45 }; 46 47 48There must be a sub-node for each job ring present in RAID Engine 49This node must be a sub-node of job queue node 50 51- compatible: Must contain "fsl,raideng-v1.0-job-ring" as the value 52 This identifies job ring. Should contain either 53 "fsl,raideng-v1.0-hp-ring" or "fsl,raideng-v1.0-lp-ring" 54 depending upon whether ring has high or low priority 55- reg: offset and length of the register set for job ring 56- interrupts: interrupt mapping for job ring IRQ 57 58Optional property: 59 60- fsl,liodn: Specifies the LIODN to be used for Job Ring. This 61 property is normally set by firmware. Value 62 is of 12-bits which is the LIODN number for this JR. 63 This property is used by the IOMMU (PAMU) to distinquish 64 transactions from this JR and than be able to do address 65 translation & protection accordingly. 66 67Example: 68 /* P5020 */ 69 raideng_jq0@1000 { 70 compatible = "fsl,raideng-v1.0-job-queue"; 71 reg = <0x1000 0x1000>; 72 ranges = <0x0 0x1000 0x1000>; 73 74 raideng_jr0: jr@0 { 75 compatible = "fsl,raideng-v1.0-job-ring", "fsl,raideng-v1.0-hp-ring"; 76 reg = <0x0 0x400>; 77 interrupts = <139 2 0 0>; 78 interrupt-parent = <&mpic>; 79 fsl,liodn = <0x41>; 80 }; 81 };