From 1723d90915d4689fa2e8cd4151d45ea38c96cb99 Mon Sep 17 00:00:00 2001 From: Xuelin Shi Date: Wed, 21 Nov 2012 17:01:20 +0800 Subject: powerpc/dma/raidengine: add raidengine device The RaidEngine is a new Freescale hardware that used for parity computation offloading in RAID5/6. This patch adds the device node in device tree and related binding documentation. Signed-off-by: Harninder Rai Signed-off-by: Naveen Burmi Signed-off-by: Xuelin Shi Signed-off-by: Kumar Gala --- .../devicetree/bindings/powerpc/fsl/raideng.txt | 81 ++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 Documentation/devicetree/bindings/powerpc/fsl/raideng.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt b/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt new file mode 100644 index 0000000..4ad29b9 --- /dev/null +++ b/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt @@ -0,0 +1,81 @@ +* Freescale 85xx RAID Engine nodes + +RAID Engine nodes are defined to describe on-chip RAID accelerators. Each RAID +Engine should have a separate node. + +Supported chips: +P5020, P5040 + +Required properties: + +- compatible: Should contain "fsl,raideng-v1.0" as the value + This identifies RAID Engine block. 1 in 1.0 represents + major number whereas 0 represents minor number. The + version matches the hardware IP version. +- reg: offset and length of the register set for the device +- ranges: standard ranges property specifying the translation + between child address space and parent address space + +Example: + /* P5020 */ + raideng: raideng@320000 { + compatible = "fsl,raideng-v1.0"; + #address-cells = <1>; + #size-cells = <1>; + reg = <0x320000 0x10000>; + ranges = <0 0x320000 0x10000>; + }; + + +There must be a sub-node for each job queue present in RAID Engine +This node must be a sub-node of the main RAID Engine node + +- compatible: Should contain "fsl,raideng-v1.0-job-queue" as the value + This identifies the job queue interface +- reg: offset and length of the register set for job queue +- ranges: standard ranges property specifying the translation + between child address space and parent address space + +Example: + /* P5020 */ + raideng_jq0@1000 { + compatible = "fsl,raideng-v1.0-job-queue"; + reg = <0x1000 0x1000>; + ranges = <0x0 0x1000 0x1000>; + }; + + +There must be a sub-node for each job ring present in RAID Engine +This node must be a sub-node of job queue node + +- compatible: Must contain "fsl,raideng-v1.0-job-ring" as the value + This identifies job ring. Should contain either + "fsl,raideng-v1.0-hp-ring" or "fsl,raideng-v1.0-lp-ring" + depending upon whether ring has high or low priority +- reg: offset and length of the register set for job ring +- interrupts: interrupt mapping for job ring IRQ + +Optional property: + +- fsl,liodn: Specifies the LIODN to be used for Job Ring. This + property is normally set by firmware. Value + is of 12-bits which is the LIODN number for this JR. + This property is used by the IOMMU (PAMU) to distinquish + transactions from this JR and than be able to do address + translation & protection accordingly. + +Example: + /* P5020 */ + raideng_jq0@1000 { + compatible = "fsl,raideng-v1.0-job-queue"; + reg = <0x1000 0x1000>; + ranges = <0x0 0x1000 0x1000>; + + raideng_jr0: jr@0 { + compatible = "fsl,raideng-v1.0-job-ring", "fsl,raideng-v1.0-hp-ring"; + reg = <0x0 0x400>; + interrupts = <139 2 0 0>; + interrupt-parent = <&mpic>; + fsl,liodn = <0x41>; + }; + }; -- cgit v1.1