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Message-Id: <20180405160459.16693-3-ilina@codeaurora.org> Date: Thu, 5 Apr 2018 10:04:59 -0600 From: Lina Iyer <ilina@...eaurora.org> To: andy.gross@...aro.org, david.brown@...aro.org, linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org Cc: rnayak@...eaurora.org, bjorn.andersson@...aro.org, linux-kernel@...r.kernel.org, sboyd@...nel.org, evgreen@...omium.org, dianders@...omium.org, Lina Iyer <ilina@...eaurora.org>, devicetree@...r.kernel.org, Mahesh Sivasubramanian <msivasub@...eaurora.org> Subject: [PATCH v6 2/2] dt-bindings: introduce Command DB for QCOM SoCs From: Mahesh Sivasubramanian <msivasub@...eaurora.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@...r.kernel.org Signed-off-by: Mahesh Sivasubramanian <msivasub@...eaurora.org> Signed-off-by: Lina Iyer <ilina@...eaurora.org> --- 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..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: + +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@...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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