From: Mahesh Sivasubramanian <msivasub@xxxxxxxxxxxxxx>
Command DB provides information on shared resources like clocks,
regulators etc., probed at boot by the remote subsytem and made
available in shared memory.
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Mahesh Sivasubramanian <msivasub@xxxxxxxxxxxxxx>
Signed-off-by: Lina Iyer <ilina@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/arm/msm/cmd-db.txt | 37 ++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/msm/cmd-db.txt
diff --git a/Documentation/devicetree/bindings/arm/msm/cmd-db.txt b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt
new file mode 100644
index 000000000000..b56e3e3604d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt
@@ -0,0 +1,37 @@
+Command DB
+---------
+
+Command DB is a database that provides a mapping between resource key and the
+resource address for a system resource managed by a remote processor. The data
+is stored in a shared memory region and is loaded by the remote processor.
+
+Some of the Qualcomm Technologies Inc SoC's have hardware accelerators for
+controlling shared resources. Depending on the board configuration the shared
+resource properties may change. These properties are dynamically probed by the
+remote processor and made available in the shared memory.
+
+Command DB allows drivers to query resource parameters based on pre-determined
+key strings.
+
+The devicetree representation of the command DB driver should be:
+
+PROPERTIES:
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: Should be "qcom,cmd-db"
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: First element is the base address of shared memory
+ Second element is the size of the shared memory region
+ Points to the dictionary address that houses the command DB
+ start address and the size of the command DB region
+
+Example:
+
+ qcom,cmd-db@c3f000c {
+ compatible = "qcom,cmd-db";
+ reg = <0xc3f000c 0x8>;
+ };
--
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