148 lines
3.4 KiB
Plaintext
148 lines
3.4 KiB
Plaintext
Qualcomm RPM/RPMh Power domains
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For RPM/RPMh Power domains, we communicate a performance state to RPM/RPMh
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which then translates it into a corresponding voltage on a rail
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Required Properties:
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- compatible: Should be one of the following
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* qcom,msm8996-rpmpd: RPM Power domain for the msm8996 family of SoC
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* qcom,msm8998-rpmpd: RPM Power domain for the msm8998 family of SoC
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* qcom,qcs404-rpmpd: RPM Power domain for the qcs404 family of SoC
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* qcom,sdm845-rpmhpd: RPMh Power domain for the sdm845 family of SoC
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- #power-domain-cells: number of cells in Power domain specifier
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must be 1.
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- operating-points-v2: Phandle to the OPP table for the Power domain.
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Refer to Documentation/devicetree/bindings/power/power_domain.txt
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and Documentation/devicetree/bindings/opp/opp.txt for more details
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Refer to <dt-bindings/power/qcom-rpmpd.h> for the level values for
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various OPPs for different platforms as well as Power domain indexes
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Example: rpmh power domain controller and OPP table
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#include <dt-bindings/power/qcom-rpmhpd.h>
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opp-level values specified in the OPP tables for RPMh power domains
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should use the RPMH_REGULATOR_LEVEL_* constants from
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<dt-bindings/power/qcom-rpmhpd.h>
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rpmhpd: power-controller {
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compatible = "qcom,sdm845-rpmhpd";
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#power-domain-cells = <1>;
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operating-points-v2 = <&rpmhpd_opp_table>;
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rpmhpd_opp_table: opp-table {
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compatible = "operating-points-v2";
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rpmhpd_opp_ret: opp1 {
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opp-level = <RPMH_REGULATOR_LEVEL_RETENTION>;
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};
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rpmhpd_opp_min_svs: opp2 {
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opp-level = <RPMH_REGULATOR_LEVEL_MIN_SVS>;
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};
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rpmhpd_opp_low_svs: opp3 {
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opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS>;
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};
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rpmhpd_opp_svs: opp4 {
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opp-level = <RPMH_REGULATOR_LEVEL_SVS>;
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};
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rpmhpd_opp_svs_l1: opp5 {
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opp-level = <RPMH_REGULATOR_LEVEL_SVS_L1>;
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};
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rpmhpd_opp_nom: opp6 {
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opp-level = <RPMH_REGULATOR_LEVEL_NOM>;
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};
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rpmhpd_opp_nom_l1: opp7 {
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opp-level = <RPMH_REGULATOR_LEVEL_NOM_L1>;
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};
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rpmhpd_opp_nom_l2: opp8 {
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opp-level = <RPMH_REGULATOR_LEVEL_NOM_L2>;
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};
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rpmhpd_opp_turbo: opp9 {
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opp-level = <RPMH_REGULATOR_LEVEL_TURBO>;
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};
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rpmhpd_opp_turbo_l1: opp10 {
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opp-level = <RPMH_REGULATOR_LEVEL_TURBO_L1>;
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};
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};
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};
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Example: rpm power domain controller and OPP table
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rpmpd: power-controller {
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compatible = "qcom,msm8996-rpmpd";
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#power-domain-cells = <1>;
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operating-points-v2 = <&rpmpd_opp_table>;
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rpmpd_opp_table: opp-table {
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compatible = "operating-points-v2";
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rpmpd_opp_low: opp1 {
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opp-level = <1>;
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};
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rpmpd_opp_ret: opp2 {
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opp-level = <2>;
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};
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rpmpd_opp_svs: opp3 {
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opp-level = <3>;
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};
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rpmpd_opp_normal: opp4 {
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opp-level = <4>;
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};
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rpmpd_opp_high: opp5 {
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opp-level = <5>;
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};
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rpmpd_opp_turbo: opp6 {
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opp-level = <6>;
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};
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};
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};
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Example: Client/Consumer device using OPP table
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leaky-device0@12350000 {
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compatible = "foo,i-leak-current";
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reg = <0x12350000 0x1000>;
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power-domains = <&rpmhpd SDM845_MX>;
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operating-points-v2 = <&leaky_opp_table>;
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};
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leaky_opp_table: opp-table {
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compatible = "operating-points-v2";
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opp1 {
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opp-hz = /bits/ 64 <144000>;
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required-opps = <&rpmhpd_opp_low>;
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};
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opp2 {
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opp-hz = /bits/ 64 <400000>;
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required-opps = <&rpmhpd_opp_ret>;
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};
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opp3 {
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opp-hz = /bits/ 64 <20000000>;
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required-opps = <&rpmpd_opp_svs>;
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};
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opp4 {
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opp-hz = /bits/ 64 <25000000>;
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required-opps = <&rpmpd_opp_normal>;
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};
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};
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