Re: [PATCH v4 2/2] dt-bindings: introduce Command DB for QCOM SoCs
From: Stephen Boyd <sboyd@kernel.org>
Date: 2018-03-06 00:21:16
Also in:
linux-arm-msm, lkml
Quoting Lina Iyer (2018-02-26 09:58:02)
quoted hunk ↗ jump to hunk
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
s/between/between 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
s/SoC's/SoCs/
+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
s/bindings/node/ maybe?
+devicetree. The devicetree representation of the command DB driver should be:
Maybe drop this last sentence entirely.
+ +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.
s/lacation/location/
+
+Example:
+
+ reserved-memory {
+ [...]
+ qcom,cmd-db@c3f000c {
+ reg = <0x0 0xc3f000c 0x0 0x8>,
+ <0x0 0x85fe0000 0x0 0x20000>;
+ compatible = "qcom,cmd-db";
+ };
+ };