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Date:   Thu,  5 Apr 2018 10:04:59 -0600
From:   Lina Iyer <>
        Lina Iyer <>,,
        Mahesh Sivasubramanian <>
Subject: [PATCH v6 2/2] dt-bindings: introduce Command DB for QCOM SoCs

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 <>

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 Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt

diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt b/Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt
new file mode 100644
index 000000000000..d808ada474c1
--- /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 location of the
+		    Command DB in memory. Additionally, specify the address
+		    and size of the actual lacation in memory.
+	reserved-memory {
+		[...]
+		qcom,cmd-db@...e0000 {
+			reg = <0x0 0x85fe0000 0x0 0x20000>;
+			compatible = "qcom,cmd-db";
+		};
+	};
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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