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dt-bindings: devfreq: Add DT bindings for ARM memlat driver

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This patch adds the DT bindings for devfreq ARM memlat driver.

Change-Id: I3166bb2027de9a32aba63ecdb894a5f9dc85bacc
This commit is contained in:
Amir Vajid 2019-01-01 12:16:58 -08:00
commit 08c920458a
1 changed files with 31 additions and 0 deletions
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31
bindings/devfreq/arm-memlat-mon.txt Normal file
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ARM CPU memory latency monitor device
arm-memlat-mon is a device that represents the use of the PMU in ARM cores
to measure the parameters for latency driven memory access patterns.
Required properties:
- compatible: Must be "qcom,arm-memlat-mon"
- qcom,cpulist: List of CPU phandles to be monitored in a cluster
- qcom,target-dev: The DT device that corresponds to this master port
- qcom,core-dev-table: A mapping table of core frequency to a required bandwidth vote at the
given core frequency.
Optional properties:
- qcom,cachemiss-ev: The cache miss event that this monitor is supposed to measure.
Defaults to 0x17 if not specified.
- qcom,inst-ev: The instruction count event that this monitor is supposed to measure.
Defaults to 0x08 if not specified.
Example:
qcom,arm-memlat-mon {
compatible = "qcom,arm-memlat-mon";
qcom,cpulist = <&CPU0 &CPU1>;
qcom,target-dev = <&memlat0>;
qcom,cachemiss-ev = <0x2A>;
qcom,inst-ev = <0x08>;
qcom,core-dev-table =
< 300000 1525>,
< 499200 3143>,
< 1881600 5859>;
};