Messages in this thread Patch in this message | | | From | Lina Iyer <> | Subject | [PATCH v4 2/2] dt-bindings: introduce Command DB for QCOM SoCs | Date | Mon, 26 Feb 2018 10:58:02 -0700 |
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From: Mahesh Sivasubramanian <msivasub@codeaurora.org>
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 <msivasub@codeaurora.org> Signed-off-by: Lina Iyer <ilina@codeaurora.org> ---
Changes in v4: - Fix unwanted capitalization - Add reg property --- .../devicetree/bindings/arm/msm/cmd-db.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 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..5737ed2ac6e8 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt @@ -0,0 +1,38 @@ +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 location of the + Command DB in memory. Additionally, specify the address + and size of the actual lacation in memory. + +Example: + + reserved-memory { + [...] + qcom,cmd-db@c3f000c { + reg = <0x0 0xc3f000c 0x0 0x8>, + <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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