[PATCH] powerpc/fsl: add device tree binding for QE firmware

[Timur Tabi <timur-KZfg59tc24xl57MIdRCFDg@public.gmane.org>]

Define a binding for embedding a QE firmware blob into the device tree.  Also
define a new property for the QE node that links to a firmware node.

Signed-off-by: Timur Tabi <timur-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
---
 .../powerpc/dts-bindings/fsl/cpm_qe/qe.txt         |   50 ++++++++++++++++++++
 1 files changed, 50 insertions(+), 0 deletions(-)

diff --git a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe.txt b/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe.txt
index 6e37be1..d9d6431 100644
--- a/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe.txt
+++ b/Documentation/powerpc/dts-bindings/fsl/cpm_qe/qe.txt
@@ -20,6 +20,14 @@ Required properties:
 - fsl,qe-num-riscs: define how many RISC engines the QE has.
 - fsl,qe-num-snums: define how many serial number(SNUM) the QE can use for the
   threads.
+- fsl,firmware-phandle:
+    Usage: required
+    Value type: <phandle>
+    Definition: Points to a firmware node (see "QE Firmware Node" below)
+        that contains the firmware that should be uploaded for this QE.
+        The compatible property for the firmware node should say,
+        "fsl,qe-firmware".
+
 
 Recommended properties
 - brg-frequency : the internal clock source frequency for baud-rate
@@ -59,3 +67,45 @@ Example:
 		reg = <0 c000>;
 	};
      };
+
+* QE Firmware Node
+
+This node defines a firmware binary that is embedded in the device tree, for
+the purpose of passing the firmware from bootloader to the kernel, or from
+the hypervisor to the guest.
+
+The firmware node itself contains the firmware binary contents, a compatible
+property, and any firmware-specific properties.  The node itself can be located
+anywhere, but should probably be placed at the top level.  The QE node
+that needs the firmware should define a property that links to the firmware
+node's phandle.
+
+This node is typically not defined in the DTS.  Instead, the boot loader
+normally creates the node from scratch, using a firmware binary that is already
+located in non-volatile storage or transferred from a tftp server.
+
+Required properties:
+  - compatible
+      Usage: required
+      Value type: <string>
+      Definition: A standard property.  Specify a string that indicates what
+          kind of firmware it is.  For QE, this should be "fsl,qe-firmware".
+
+   - fsl,firmware
+      Usage: required
+      Value type: <prop-encoded-array>, encoded as an array of bytes
+      Definition: A standard property.  This property contains the firmware
+          binary "blob".
+
+Example:
+	qe@e0080000 {
+		compatible = "fsl,qe";
+		fsl,firmware-phandle = <&qe_firmware>;
+		...
+	}
+
+	qe_firmware:qe-firmware {
+		compatible = "fsl,qe-firmware";
+		fsl,firmware = <0x70 0xcd 0x00 0x00 0x01 0x46 0x45 0x63 ...>
+	}
+
-- 
1.6.5