# SPDX-License-Identifier: GPL-2.0 %YAML 1.2 --- $id: http://devicetree.org/schemas/devfreq/event/samsung,exynos-ppmu.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Samsung Exynos SoC PPMU (Platform Performance Monitoring Unit) maintainers: - Chanwoo Choi - Krzysztof Kozlowski description: | The Samsung Exynos SoC has PPMU (Platform Performance Monitoring Unit) for each IP. PPMU provides the primitive values to get performance data. These PPMU events provide information of the SoC's behaviors so that you may use to analyze system performance, to make behaviors visible and to count usages of each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D, MFC). The Exynos PPMU driver uses the devfreq-event class to provide event data to various devfreq devices. The devfreq devices would use the event data when determining the current state of each IP. properties: compatible: enum: - samsung,exynos-ppmu - samsung,exynos-ppmu-v2 clock-names: items: - const: ppmu clocks: maxItems: 1 reg: maxItems: 1 events: type: object patternProperties: '^ppmu-event[0-9]+(-[a-z0-9]+){,2}$': type: object properties: event-name: description: | The unique event name among PPMU device $ref: /schemas/types.yaml#/definitions/string event-data-type: description: | Define the type of data which shell be counted by the counter. You can check include/dt-bindings/pmu/exynos_ppmu.h for all possible type, i.e. count read requests, count write data in bytes, etc. This field is optional and when it is missing, the driver code will use default data type. $ref: /schemas/types.yaml#/definitions/uint32 required: - event-name additionalProperties: false additionalProperties: false required: - compatible - reg additionalProperties: false examples: - | // PPMUv1 nodes for Exynos3250 (although the board DTS defines events) #include ppmu_dmc0: ppmu@106a0000 { compatible = "samsung,exynos-ppmu"; reg = <0x106a0000 0x2000>; events { ppmu_dmc0_3: ppmu-event3-dmc0 { event-name = "ppmu-event3-dmc0"; }; ppmu_dmc0_2: ppmu-event2-dmc0 { event-name = "ppmu-event2-dmc0"; }; ppmu_dmc0_1: ppmu-event1-dmc0 { event-name = "ppmu-event1-dmc0"; }; ppmu_dmc0_0: ppmu-event0-dmc0 { event-name = "ppmu-event0-dmc0"; }; }; }; ppmu_rightbus: ppmu@112a0000 { compatible = "samsung,exynos-ppmu"; reg = <0x112a0000 0x2000>; clocks = <&cmu CLK_PPMURIGHT>; clock-names = "ppmu"; events { ppmu_rightbus_3: ppmu-event3-rightbus { event-name = "ppmu-event3-rightbus"; }; }; }; - | // PPMUv2 nodes in Exynos5433 ppmu_d0_cpu: ppmu@10480000 { compatible = "samsung,exynos-ppmu-v2"; reg = <0x10480000 0x2000>; }; ppmu_d0_general: ppmu@10490000 { compatible = "samsung,exynos-ppmu-v2"; reg = <0x10490000 0x2000>; events { ppmu_event0_d0_general: ppmu-event0-d0-general { event-name = "ppmu-event0-d0-general"; }; }; }; ppmu_d0_rt: ppmu@104a0000 { compatible = "samsung,exynos-ppmu-v2"; reg = <0x104a0000 0x2000>; }; ppmu_d1_cpu: ppmu@104b0000 { compatible = "samsung,exynos-ppmu-v2"; reg = <0x104b0000 0x2000>; }; ppmu_d1_general: ppmu@104c0000 { compatible = "samsung,exynos-ppmu-v2"; reg = <0x104c0000 0x2000>; }; ppmu_d1_rt: ppmu@104d0000 { compatible = "samsung,exynos-ppmu-v2"; reg = <0x104d0000 0x2000>; }; - | // PPMUv1 nodes with event-data-type for Exynos4412 #include ppmu@106a0000 { compatible = "samsung,exynos-ppmu"; reg = <0x106a0000 0x2000>; clocks = <&clock 400>; clock-names = "ppmu"; events { ppmu-event3-dmc0 { event-name = "ppmu-event3-dmc0"; event-data-type = <(PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT)>; }; }; };