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