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authorXuelin Shi <b29237@freescale.com>2012-11-21 17:01:20 +0800
committerKumar Gala <galak@kernel.crashing.org>2012-11-25 07:19:51 -0600
commit1723d90915d4689fa2e8cd4151d45ea38c96cb99 (patch)
tree05e6b66c430b9a28e982193e984c9eb24a51ea45 /Documentation
parent5320b50797a9a5373f31f5b1c26346357f73e179 (diff)
downloadblackbird-op-linux-1723d90915d4689fa2e8cd4151d45ea38c96cb99.tar.gz
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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.txt81
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diff --git a/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt b/Documentation/devicetree/bindings/powerpc/fsl/raideng.txt
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+* 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>;
+ };
+ };
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