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| author | Xuelin Shi <b29237@freescale.com> | 2012-11-21 10:01:20 +0100 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2012-11-25 14:19:51 +0100 |
| commit | 1723d90915d4689fa2e8cd4151d45ea38c96cb99 (patch) | |
| tree | 05e6b66c430b9a28e982193e984c9eb24a51ea45 /Documentation | |
| parent | powerpc/iommu/fsl: Add PAMU bypass enable register to ccsr_guts struct (diff) | |
| download | linux-1723d90915d4689fa2e8cd4151d45ea38c96cb99.tar.xz linux-1723d90915d4689fa2e8cd4151d45ea38c96cb99.zip | |
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 <harninder.rai@freescale.com>
Signed-off-by: Naveen Burmi <naveenburmi@freescale.com>
Signed-off-by: Xuelin Shi <b29237@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/powerpc/fsl/raideng.txt | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt b/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt new file mode 100644 index 000000000000..4ad29b9ac2ac --- /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>; + }; + }; |