[PATCH v8 2/2] dt-bindings: introduce Command DB for QCOM SoCs
From: Lina Iyer <hidden>
Date: 2018-04-10 17:57:39
Also in:
lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, open firmware and flattened device tree bindings, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Mahesh Sivasubramanian <redacted> 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@vger.kernel.org Signed-off-by: Mahesh Sivasubramanian <redacted> Signed-off-by: Lina Iyer <redacted> Reviewed-by: Bjorn Andersson <redacted> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Stephen Boyd <redacted> Reviewed-by: Evan Green <redacted> --- 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 memory 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..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: + +Properties: +- 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. + +Example: + + reserved-memory { + [...] + reserved-memory@85fe0000 { + reg = <0x0 0x85fe0000 0x0 0x20000>; + compatible = "qcom,cmd-db"; + no-map; + }; + };
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project