| # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/cpufreq/cpufreq-qcom-hw.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Qualcomm Technologies, Inc. CPUFREQ |
| |
| maintainers: |
| - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| |
| description: | |
| |
| CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI) |
| SoCs to manage frequency in hardware. It is capable of controlling frequency |
| for multiple clusters. |
| |
| properties: |
| compatible: |
| oneOf: |
| - description: v1 of CPUFREQ HW |
| items: |
| - const: qcom,cpufreq-hw |
| |
| - description: v2 of CPUFREQ HW (EPSS) |
| items: |
| - enum: |
| - qcom,qdu1000-cpufreq-epss |
| - qcom,sc7280-cpufreq-epss |
| - qcom,sc8280xp-cpufreq-epss |
| - qcom,sm6375-cpufreq-epss |
| - qcom,sm8250-cpufreq-epss |
| - qcom,sm8350-cpufreq-epss |
| - qcom,sm8450-cpufreq-epss |
| - qcom,sm8550-cpufreq-epss |
| - const: qcom,cpufreq-epss |
| |
| reg: |
| minItems: 2 |
| items: |
| - description: Frequency domain 0 register region |
| - description: Frequency domain 1 register region |
| - description: Frequency domain 2 register region |
| |
| reg-names: |
| minItems: 2 |
| items: |
| - const: freq-domain0 |
| - const: freq-domain1 |
| - const: freq-domain2 |
| |
| clocks: |
| items: |
| - description: XO Clock |
| - description: GPLL0 Clock |
| |
| clock-names: |
| items: |
| - const: xo |
| - const: alternate |
| |
| interrupts: |
| minItems: 1 |
| maxItems: 3 |
| |
| interrupt-names: |
| minItems: 1 |
| items: |
| - const: dcvsh-irq-0 |
| - const: dcvsh-irq-1 |
| - const: dcvsh-irq-2 |
| |
| '#freq-domain-cells': |
| const: 1 |
| |
| '#clock-cells': |
| const: 1 |
| |
| required: |
| - compatible |
| - reg |
| - clocks |
| - clock-names |
| - '#freq-domain-cells' |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/clock/qcom,gcc-sdm845.h> |
| #include <dt-bindings/clock/qcom,rpmh.h> |
| |
| // Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster |
| // switch DCVS state together. |
| cpus { |
| #address-cells = <2>; |
| #size-cells = <0>; |
| |
| CPU0: cpu@0 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x0>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_0>; |
| qcom,freq-domain = <&cpufreq_hw 0>; |
| clocks = <&cpufreq_hw 0>; |
| L2_0: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| L3_0: l3-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <3>; |
| }; |
| }; |
| }; |
| |
| CPU1: cpu@100 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x100>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_100>; |
| qcom,freq-domain = <&cpufreq_hw 0>; |
| clocks = <&cpufreq_hw 0>; |
| L2_100: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| |
| CPU2: cpu@200 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x200>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_200>; |
| qcom,freq-domain = <&cpufreq_hw 0>; |
| clocks = <&cpufreq_hw 0>; |
| L2_200: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| |
| CPU3: cpu@300 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x300>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_300>; |
| qcom,freq-domain = <&cpufreq_hw 0>; |
| clocks = <&cpufreq_hw 0>; |
| L2_300: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| |
| CPU4: cpu@400 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x400>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_400>; |
| qcom,freq-domain = <&cpufreq_hw 1>; |
| clocks = <&cpufreq_hw 1>; |
| L2_400: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| |
| CPU5: cpu@500 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x500>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_500>; |
| qcom,freq-domain = <&cpufreq_hw 1>; |
| clocks = <&cpufreq_hw 1>; |
| L2_500: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| |
| CPU6: cpu@600 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x600>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_600>; |
| qcom,freq-domain = <&cpufreq_hw 1>; |
| clocks = <&cpufreq_hw 1>; |
| L2_600: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| |
| CPU7: cpu@700 { |
| device_type = "cpu"; |
| compatible = "qcom,kryo385"; |
| reg = <0x0 0x700>; |
| enable-method = "psci"; |
| next-level-cache = <&L2_700>; |
| qcom,freq-domain = <&cpufreq_hw 1>; |
| clocks = <&cpufreq_hw 1>; |
| L2_700: l2-cache { |
| compatible = "cache"; |
| cache-unified; |
| cache-level = <2>; |
| next-level-cache = <&L3_0>; |
| }; |
| }; |
| }; |
| |
| soc { |
| #address-cells = <1>; |
| #size-cells = <1>; |
| |
| cpufreq@17d43000 { |
| compatible = "qcom,cpufreq-hw"; |
| reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>; |
| reg-names = "freq-domain0", "freq-domain1"; |
| |
| clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>; |
| clock-names = "xo", "alternate"; |
| |
| #freq-domain-cells = <1>; |
| #clock-cells = <1>; |
| }; |
| }; |
| ... |
