qcom-cpufreq-nvmem.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/cpufreq/qcom-cpufreq-nvmem.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Qualcomm Technologies, Inc. NVMEM CPUFreq bindings
    8 
    9 maintainers:
   10   - Ilia Lin <ilia.lin@kernel.org>
   11 
   12 description: |
   13   In certain Qualcomm Technologies, Inc. SoCs such as QCS404, The CPU supply
   14   voltage is dynamically configured by Core Power Reduction (CPR) depending on
   15   current CPU frequency and efuse values.
   16   CPR provides a power domain with multiple levels that are selected depending
   17   on the CPU OPP in use. The CPUFreq driver sets the CPR power domain level
   18   according to the required OPPs defined in the CPU OPP tables.
   19 
   20 select:
   21   properties:
   22     compatible:
   23       contains:
   24         enum:
   25           - qcom,apq8064
   26           - qcom,apq8096
   27           - qcom,ipq8064
   28           - qcom,msm8939
   29           - qcom,msm8960
   30           - qcom,msm8974
   31           - qcom,msm8996
   32           - qcom,qcs404
   33   required:
   34     - compatible
   35 
   36 properties:
   37   cpus:
   38     type: object
   39 
   40     patternProperties:
   41       'cpu@[0-9a-f]+':
   42         type: object
   43 
   44         properties:
   45           power-domains:
   46             maxItems: 1
   47 
   48           power-domain-names:
   49             items:
   50               - const: cpr
   51 
   52         required:
   53           - power-domains
   54           - power-domain-names
   55 
   56 patternProperties:
   57   '^opp-table(-[a-z0-9]+)?$':
   58     if:
   59       properties:
   60         compatible:
   61           const: operating-points-v2-kryo-cpu
   62     then:
   63       patternProperties:
   64         '^opp-?[0-9]+$':
   65           required:
   66             - required-opps
   67 
   68 additionalProperties: true
   69 
   70 examples:
   71   - |
   72     / {
   73         model = "Qualcomm Technologies, Inc. QCS404 EVB 1000";
   74         compatible = "qcom,qcs404-evb-1000", "qcom,qcs404-evb", "qcom,qcs404";
   75         #address-cells = <2>;
   76         #size-cells = <2>;
   77 
   78         cpus {
   79             #address-cells = <1>;
   80             #size-cells = <0>;
   81 
   82             CPU0: cpu@100 {
   83                 device_type = "cpu";
   84                 compatible = "arm,cortex-a53";
   85                 reg = <0x100>;
   86                 enable-method = "psci";
   87                 cpu-idle-states = <&CPU_SLEEP_0>;
   88                 next-level-cache = <&L2_0>;
   89                 #cooling-cells = <2>;
   90                 clocks = <&apcs_glb>;
   91                 operating-points-v2 = <&cpu_opp_table>;
   92                 power-domains = <&cpr>;
   93                 power-domain-names = "cpr";
   94             };
   95 
   96             CPU1: cpu@101 {
   97                 device_type = "cpu";
   98                 compatible = "arm,cortex-a53";
   99                 reg = <0x101>;
  100                 enable-method = "psci";
  101                 cpu-idle-states = <&CPU_SLEEP_0>;
  102                 next-level-cache = <&L2_0>;
  103                 #cooling-cells = <2>;
  104                 clocks = <&apcs_glb>;
  105                 operating-points-v2 = <&cpu_opp_table>;
  106                 power-domains = <&cpr>;
  107                 power-domain-names = "cpr";
  108             };
  109 
  110             CPU2: cpu@102 {
  111                 device_type = "cpu";
  112                 compatible = "arm,cortex-a53";
  113                 reg = <0x102>;
  114                 enable-method = "psci";
  115                 cpu-idle-states = <&CPU_SLEEP_0>;
  116                 next-level-cache = <&L2_0>;
  117                 #cooling-cells = <2>;
  118                 clocks = <&apcs_glb>;
  119                 operating-points-v2 = <&cpu_opp_table>;
  120                 power-domains = <&cpr>;
  121                 power-domain-names = "cpr";
  122             };
  123 
  124             CPU3: cpu@103 {
  125                 device_type = "cpu";
  126                 compatible = "arm,cortex-a53";
  127                 reg = <0x103>;
  128                 enable-method = "psci";
  129                 cpu-idle-states = <&CPU_SLEEP_0>;
  130                 next-level-cache = <&L2_0>;
  131                 #cooling-cells = <2>;
  132                 clocks = <&apcs_glb>;
  133                 operating-points-v2 = <&cpu_opp_table>;
  134                 power-domains = <&cpr>;
  135                 power-domain-names = "cpr";
  136             };
  137         };
  138 
  139         cpu_opp_table: opp-table-cpu {
  140             compatible = "operating-points-v2-kryo-cpu";
  141             opp-shared;
  142 
  143             opp-1094400000 {
  144                 opp-hz = /bits/ 64 <1094400000>;
  145                 required-opps = <&cpr_opp1>;
  146             };
  147             opp-1248000000 {
  148                 opp-hz = /bits/ 64 <1248000000>;
  149                 required-opps = <&cpr_opp2>;
  150             };
  151             opp-1401600000 {
  152                 opp-hz = /bits/ 64 <1401600000>;
  153                 required-opps = <&cpr_opp3>;
  154             };
  155         };
  156 
  157         cpr_opp_table: opp-table-cpr {
  158             compatible = "operating-points-v2-qcom-level";
  159 
  160             cpr_opp1: opp1 {
  161                 opp-level = <1>;
  162                 qcom,opp-fuse-level = <1>;
  163             };
  164             cpr_opp2: opp2 {
  165                 opp-level = <2>;
  166                 qcom,opp-fuse-level = <2>;
  167             };
  168             cpr_opp3: opp3 {
  169                 opp-level = <3>;
  170                 qcom,opp-fuse-level = <3>;
  171             };
  172         };
  173     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/cpufreq/qcom-cpufreq-nvmem.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/cpufreq/qcom-cpufreq-nvmem.yaml