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58 lines
2.0 KiB
Plaintext
58 lines
2.0 KiB
Plaintext
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NVIDIA Tegra Activity Monitor
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The activity monitor block collects statistics about the behaviour of other
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components in the system. This information can be used to derive the rate at
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which the external memory needs to be clocked in order to serve all requests
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from the monitored clients.
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Required properties:
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- compatible: should be "nvidia,tegra<chip>-actmon"
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- reg: offset and length of the register set for the device
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- interrupts: standard interrupt property
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- clocks: Must contain a phandle and clock specifier pair for each entry in
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clock-names. See ../../clock/clock-bindings.txt for details.
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- clock-names: Must include the following entries:
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- actmon
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- emc
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- resets: Must contain an entry for each entry in reset-names. See
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../../reset/reset.txt for details.
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- reset-names: Must include the following entries:
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- actmon
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- operating-points-v2: See ../bindings/opp/opp.txt for details.
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- interconnects: Should contain entries for memory clients sitting on
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MC->EMC memory interconnect path.
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- interconnect-names: Should include name of the interconnect path for each
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interconnect entry. Consult TRM documentation for
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information about available memory clients, see MEMORY
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CONTROLLER section.
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For each opp entry in 'operating-points-v2' table:
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- opp-supported-hw: bitfield indicating SoC speedo ID mask
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- opp-peak-kBps: peak bandwidth of the memory channel
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Example:
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dfs_opp_table: opp-table {
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compatible = "operating-points-v2";
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opp@12750000 {
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opp-hz = /bits/ 64 <12750000>;
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opp-supported-hw = <0x000F>;
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opp-peak-kBps = <51000>;
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};
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...
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};
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actmon@6000c800 {
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compatible = "nvidia,tegra124-actmon";
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reg = <0x0 0x6000c800 0x0 0x400>;
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interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&tegra_car TEGRA124_CLK_ACTMON>,
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<&tegra_car TEGRA124_CLK_EMC>;
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clock-names = "actmon", "emc";
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resets = <&tegra_car 119>;
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reset-names = "actmon";
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operating-points-v2 = <&dfs_opp_table>;
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interconnects = <&mc TEGRA124_MC_MPCORER &emc>;
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interconnect-names = "cpu";
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};
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