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QCOM Devfreq memory latency QoS voting device
Some Qualcomm Technologies, Inc. (QTI) chipsets have an interface to vote for
a memory latency QoS level. The qcom,devfreq-qoslat represents a device that
votes on this interface to request a particular memory latency QoS level.
Required properties:
- compatible: Must be "qcom,devfreq-qoslat"
- operating-points-v2: A phandle to the OPP v2 table that holds the supported
QoS levels for the particular chipset. Currently, only
OPP values of 0 and 1 are supported.
- mboxes: A phandle to the mailbox used by this device to send
requests to adjust the memory latency QoS level.
Optional properties:
- governor: Initial governor to use for the device.
Default: "powersave"
Example:
qoslat_opp_table: qoslat-opp-table {
compatible = "operating-points-v2";
opp-0 {
opp-hz = /bits/ 64 < 0 >;
};
opp-1 {
opp-hz = /bits/ 64 < 1 >;
};
};
qcom,devfreq-qoslat {
compatible = "qcom,devfreq-qoslat";
governor = "powersave";
operating-points-v2 = <&qoslat_opp_table>;
mboxes = <&qmp_aop 0>;
};
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