Documentation/devicetree/bindings/power/qcom,rpmpd.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/power/qcom,rpmpd.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Qualcomm RPM/RPMh Power domains

maintainers:
  - Rajendra Nayak <rnayak@codeaurora.org>

description:
  For RPM/RPMh Power domains, we communicate a performance state to RPM/RPMh
  which then translates it into a corresponding voltage on a rail.

properties:
  compatible:
    enum:
      - qcom,msm8976-rpmpd
      - qcom,msm8996-rpmpd
      - qcom,msm8998-rpmpd
      - qcom,qcs404-rpmpd
      - qcom,sc7180-rpmhpd
      - qcom,sdm845-rpmhpd
      - qcom,sm8150-rpmhpd
      - qcom,sm8250-rpmhpd

  '#power-domain-cells':
    const: 1

  operating-points-v2: true

  opp-table:
    type: object

required:
  - compatible
  - '#power-domain-cells'
  - operating-points-v2

additionalProperties: false

examples:
  - |

    // Example 1 (rpmh power domain controller and OPP table):

    #include <dt-bindings/power/qcom-rpmpd.h>

    rpmhpd: power-controller {
      compatible = "qcom,sdm845-rpmhpd";
      #power-domain-cells = <1>;
      operating-points-v2 = <&rpmhpd_opp_table>;

      rpmhpd_opp_table: opp-table {
        compatible = "operating-points-v2";

        rpmhpd_opp_ret: opp1 {
          opp-level = <RPMH_REGULATOR_LEVEL_RETENTION>;
        };

        rpmhpd_opp_min_svs: opp2 {
          opp-level = <RPMH_REGULATOR_LEVEL_MIN_SVS>;
        };

        rpmhpd_opp_low_svs: opp3 {
          opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS>;
        };

        rpmhpd_opp_svs: opp4 {
          opp-level = <RPMH_REGULATOR_LEVEL_SVS>;
        };

        rpmhpd_opp_svs_l1: opp5 {
          opp-level = <RPMH_REGULATOR_LEVEL_SVS_L1>;
        };

        rpmhpd_opp_nom: opp6 {
          opp-level = <RPMH_REGULATOR_LEVEL_NOM>;
        };

        rpmhpd_opp_nom_l1: opp7 {
          opp-level = <RPMH_REGULATOR_LEVEL_NOM_L1>;
        };

        rpmhpd_opp_nom_l2: opp8 {
          opp-level = <RPMH_REGULATOR_LEVEL_NOM_L2>;
        };

        rpmhpd_opp_turbo: opp9 {
          opp-level = <RPMH_REGULATOR_LEVEL_TURBO>;
        };

        rpmhpd_opp_turbo_l1: opp10 {
          opp-level = <RPMH_REGULATOR_LEVEL_TURBO_L1>;
        };
      };
    };

  - |

    // Example 2 (rpm power domain controller and OPP table):

    rpmpd: power-controller {
      compatible = "qcom,msm8996-rpmpd";
      #power-domain-cells = <1>;
      operating-points-v2 = <&rpmpd_opp_table>;

      rpmpd_opp_table: opp-table {
        compatible = "operating-points-v2";

        rpmpd_opp_low: opp1 {
          opp-level = <1>;
        };

        rpmpd_opp_ret: opp2 {
          opp-level = <2>;
        };

        rpmpd_opp_svs: opp3 {
          opp-level = <3>;
        };

        rpmpd_opp_normal: opp4 {
          opp-level = <4>;
        };

        rpmpd_opp_high: opp5 {
          opp-level = <5>;
        };

        rpmpd_opp_turbo: opp6 {
          opp-level = <6>;
        };
      };
    };

  - |

    // Example 3 (Client/Consumer device using OPP table):

    leaky-device0@12350000 {
      compatible = "foo,i-leak-current";
      reg = <0x12350000 0x1000>;
      power-domains = <&rpmhpd 0>;
      operating-points-v2 = <&leaky_opp_table>;
    };

    leaky_opp_table: opp-table {
      compatible = "operating-points-v2";
      opp1 {
        opp-hz = /bits/ 64 <144000>;
        required-opps = <&rpmhpd_opp_low>;
      };

      opp2 {
        opp-hz = /bits/ 64 <400000>;
        required-opps = <&rpmhpd_opp_ret>;
      };

      opp3 {
        opp-hz = /bits/ 64 <20000000>;
        required-opps = <&rpmpd_opp_svs>;
      };

      opp4 {
        opp-hz = /bits/ 64 <25000000>;
        required-opps = <&rpmpd_opp_normal>;
      };
    };
...