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

   1 Qualcomm RPM/RPMh Power domains
   2
   3 For RPM/RPMh Power domains, we communicate a performance state to RPM/RPMh
   4 which then translates it into a corresponding voltage on a rail
   5
   6 Required Properties:
   7  - compatible: Should be one of the following
   8         * qcom,msm8976-rpmpd: RPM Power domain for the msm8976 family of SoC
   9         * qcom,msm8996-rpmpd: RPM Power domain for the msm8996 family of SoC
  10         * qcom,msm8998-rpmpd: RPM Power domain for the msm8998 family of SoC
  11         * qcom,qcs404-rpmpd: RPM Power domain for the qcs404 family of SoC
  12         * qcom,sdm845-rpmhpd: RPMh Power domain for the sdm845 family of SoC
  13  - #power-domain-cells: number of cells in Power domain specifier
  14         must be 1.
  15  - operating-points-v2: Phandle to the OPP table for the Power domain.
  16         Refer to Documentation/devicetree/bindings/power/power_domain.txt
  17         and Documentation/devicetree/bindings/opp/opp.txt for more details
  18
  19 Refer to <dt-bindings/power/qcom-rpmpd.h> for the level values for
  20 various OPPs for different platforms as well as Power domain indexes
  21
  22 Example: rpmh power domain controller and OPP table
  23
  24 #include <dt-bindings/power/qcom-rpmhpd.h>
  25
  26 opp-level values specified in the OPP tables for RPMh power domains
  27 should use the RPMH_REGULATOR_LEVEL_* constants from
  28 <dt-bindings/power/qcom-rpmhpd.h>
  29
  30         rpmhpd: power-controller {
  31                 compatible = "qcom,sdm845-rpmhpd";
  32                 #power-domain-cells = <1>;
  33                 operating-points-v2 = <&rpmhpd_opp_table>;
  34
  35                 rpmhpd_opp_table: opp-table {
  36                         compatible = "operating-points-v2";
  37
  38                         rpmhpd_opp_ret: opp1 {
  39                                 opp-level = <RPMH_REGULATOR_LEVEL_RETENTION>;
  40                         };
  41
  42                         rpmhpd_opp_min_svs: opp2 {
  43                                 opp-level = <RPMH_REGULATOR_LEVEL_MIN_SVS>;
  44                         };
  45
  46                         rpmhpd_opp_low_svs: opp3 {
  47                                 opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS>;
  48                         };
  49
  50                         rpmhpd_opp_svs: opp4 {
  51                                 opp-level = <RPMH_REGULATOR_LEVEL_SVS>;
  52                         };
  53
  54                         rpmhpd_opp_svs_l1: opp5 {
  55                                 opp-level = <RPMH_REGULATOR_LEVEL_SVS_L1>;
  56                         };
  57
  58                         rpmhpd_opp_nom: opp6 {
  59                                 opp-level = <RPMH_REGULATOR_LEVEL_NOM>;
  60                         };
  61
  62                         rpmhpd_opp_nom_l1: opp7 {
  63                                 opp-level = <RPMH_REGULATOR_LEVEL_NOM_L1>;
  64                         };
  65
  66                         rpmhpd_opp_nom_l2: opp8 {
  67                                 opp-level = <RPMH_REGULATOR_LEVEL_NOM_L2>;
  68                         };
  69
  70                         rpmhpd_opp_turbo: opp9 {
  71                                 opp-level = <RPMH_REGULATOR_LEVEL_TURBO>;
  72                         };
  73
  74                         rpmhpd_opp_turbo_l1: opp10 {
  75                                 opp-level = <RPMH_REGULATOR_LEVEL_TURBO_L1>;
  76                         };
  77                 };
  78         };
  79
  80 Example: rpm power domain controller and OPP table
  81
  82         rpmpd: power-controller {
  83                 compatible = "qcom,msm8996-rpmpd";
  84                 #power-domain-cells = <1>;
  85                 operating-points-v2 = <&rpmpd_opp_table>;
  86
  87                 rpmpd_opp_table: opp-table {
  88                         compatible = "operating-points-v2";
  89
  90                         rpmpd_opp_low: opp1 {
  91                                 opp-level = <1>;
  92                         };
  93
  94                         rpmpd_opp_ret: opp2 {
  95                                 opp-level = <2>;
  96                         };
  97
  98                         rpmpd_opp_svs: opp3 {
  99                                 opp-level = <3>;
 100                         };
 101
 102                         rpmpd_opp_normal: opp4 {
 103                                 opp-level = <4>;
 104                         };
 105
 106                         rpmpd_opp_high: opp5 {
 107                                 opp-level = <5>;
 108                         };
 109
 110                         rpmpd_opp_turbo: opp6 {
 111                                 opp-level = <6>;
 112                         };
 113                 };
 114         };
 115
 116 Example: Client/Consumer device using OPP table
 117
 118         leaky-device0@12350000 {
 119                 compatible = "foo,i-leak-current";
 120                 reg = <0x12350000 0x1000>;
 121                 power-domains = <&rpmhpd SDM845_MX>;
 122                 operating-points-v2 = <&leaky_opp_table>;
 123         };
 124
 125
 126         leaky_opp_table: opp-table {
 127                 compatible = "operating-points-v2";
 128
 129                 opp1 {
 130                         opp-hz = /bits/ 64 <144000>;
 131                         required-opps = <&rpmhpd_opp_low>;
 132                 };
 133
 134                 opp2 {
 135                         opp-hz = /bits/ 64 <400000>;
 136                         required-opps = <&rpmhpd_opp_ret>;
 137                 };
 138
 139                 opp3 {
 140                         opp-hz = /bits/ 64 <20000000>;
 141                         required-opps = <&rpmpd_opp_svs>;
 142                 };
 143
 144                 opp4 {
 145                         opp-hz = /bits/ 64 <25000000>;
 146                         required-opps = <&rpmpd_opp_normal>;
 147                 };
 148         };