Merge "dt-bindings: devfreq: Add DT bindings for bimc bwmon driver"

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qctecmdr 2019-11-20 20:20:47 -08:00 • committed by Gerrit - the friendly Code Review server
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MSM BIMC bandwidth monitor device
bimc-bwmon is a device that represents the MSM BIMC bandwidth monitors that
can be used to measure the bandwidth of read/write traffic from the BIMC
master ports. For example, the CPU subsystem sits on one BIMC master port.
Required properties:
- compatible: Must be "qcom,bimc-bwmon"
- reg: Pairs of physical base addresses and region sizes of
memory mapped registers.
- reg-names: Names of the bases for the above registers. Expected
bases are: "base", "global_base"
- interrupts: Lists the threshold IRQ.
- qcom,mport: The hardware master port that this device can monitor
- qcom,target-dev: The DT device that corresponds to this master port
Example:
qcom,cpu-bwmon {
compatible = "qcom,bimc-bwmon";
reg = <0xfc388000 0x300>, <0xfc381000 0x200>;
reg-names = "base", "global_base";
interrupts = <0 183 1>;
qcom,mport = <0>;
qcom,target-dev = <&cpubw>;
};

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MSM devfreq icc device
devfreq icc is a device that represents a MSM device's BW requirements from its
master port(s) to a different device's slave port(s) in a MSM SoC. This
device is typically used to vote for BW requirements from a device's (Eg:
CPU, GPU) master port(s) to the slave (Eg: DDR) port(s).
Required properties:
- compatible: Must be "qcom,devfreq-icc"
- interconnects: Pairs of phandles and interconnect provider specificers
to denote the edge source and destination ports of the
desired interconnect path.
- qcom,bw-tbl: A list of meaningful instantaneous bandwidth values
(in MB/s) that can be requested from the device
master port to the slave port. The list of values
depend on the supported bus/slave frequencies and the
bus width.
Optional properties:
- qcom,active-only: Indicates that the bandwidth votes need to be
enforced only when the CPU subsystem is active.
- governor: Initial governor to use for the device.
Default: "performance"
Example:
qcom,cpubw {
compatible = "qcom,devfreq-icc";
interconnects = <&mc_virt MASTER_LLCC &mc_virt SLAVE_EBI1>;
qcom,active-only;
qcom,bw-tbl =
< 572 /* 75 MHz */ >,
< 1144 /* 150 MHz */ >,
< 1525 /* 200 MHz */ >,
< 2342 /* 307 MHz */ >,
< 3509 /* 460 MHz */ >,
< 4684 /* 614 MHz */ >,
< 6103 /* 800 MHz */ >,
< 7102 /* 931 MHz */ >;
};