From: Mahesh Sivasubramanian <>

Command DB provides information on shared resources like clocks,
regulators etc., probed at boot by the remote subsytem and made
available in shared memory.

Signed-off-by: Mahesh Sivasubramanian <>
Signed-off-by: Lina Iyer <>
Reviewed-by: Bjorn Andersson <>
Reviewed-by: Rob Herring <>
Reviewed-by: Stephen Boyd <>
Reviewed-by: Evan Green <>

Changes in v8:
        - Fix node name
        - Add no-map property
Changes in v7:
        - Fix description of 'reg' property

Changes in v6:
        - Move to bindings/reserved-memory
        - Remove indirection address and use only the actual reserved

Changes in v4:
        - Fix unwanted capitalization
        - Add reg property
 .../bindings/reserved-memory/qcom,cmd-db.txt       | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 

diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt 
new file mode 100644
index 000000000000..68395530c0a5
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/qcom,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.
+The bindings for Command DB is specified in the reserved-memory section in
+devicetree. The devicetree representation of the command DB driver should be:
+- compatible:
+       Usage: required
+       Value type: <string>
+       Definition: Should be "qcom,cmd-db"
+- reg:
+       Usage: required
+       Value type: <prop encoded array>
+       Definition: The register address that points to the actual location of
+                   the Command DB in memory.
+       reserved-memory {
+               [...]
+               reserved-memory@85fe0000 {
+                       reg = <0x0 0x85fe0000 0x0 0x20000>;
+                       compatible = "qcom,cmd-db";
+                       no-map;
+               };
+       };
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