Messages in this thread | | | Date | Tue, 6 Mar 2018 08:57:40 -0700 | From | Lina Iyer <> | Subject | Re: [PATCH v4 2/2] dt-bindings: introduce Command DB for QCOM SoCs |
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On Mon, Mar 05 2018 at 17:21 -0700, Stephen Boyd wrote: >Quoting Lina Iyer (2018-02-26 09:58:02) >> 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/ > Will take care of these in the next spin.
>> + >> +Example: >> + >> + reserved-memory { >> + [...] >> + qcom,cmd-db@c3f000c { >> + reg = <0x0 0xc3f000c 0x0 0x8>, >> + <0x0 0x85fe0000 0x0 0x20000>; >> + compatible = "qcom,cmd-db"; >> + }; >> + };
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