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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/opp/opp-v2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic OPP (Operating Performance Points) Bindings
+
+maintainers:
+ - Viresh Kumar <viresh.kumar@linaro.org>
+
+allOf:
+ - $ref: opp-v2-base.yaml#
+
+properties:
+ compatible:
+ const: operating-points-v2
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ /*
+ * Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states
+ * together.
+ */
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "arm,cortex-a9";
+ device_type = "cpu";
+ reg = <0>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 0>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply0>;
+ operating-points-v2 = <&cpu0_opp_table0>;
+ };
+
+ cpu@1 {
+ compatible = "arm,cortex-a9";
+ device_type = "cpu";
+ reg = <1>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 0>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply0>;
+ operating-points-v2 = <&cpu0_opp_table0>;
+ };
+ };
+
+ cpu0_opp_table0: opp-table {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <975000 970000 985000>;
+ opp-microamp = <70000>;
+ clock-latency-ns = <300000>;
+ opp-suspend;
+ };
+ opp-1100000000 {
+ opp-hz = /bits/ 64 <1100000000>;
+ opp-microvolt = <1000000 980000 1010000>;
+ opp-microamp = <80000>;
+ clock-latency-ns = <310000>;
+ };
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <1025000>;
+ clock-latency-ns = <290000>;
+ turbo-mode;
+ };
+ };
+
+ - |
+ /*
+ * Example 2: Single cluster, Quad-core Qualcom-krait, switches DVFS states
+ * independently.
+ */
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "qcom,krait";
+ device_type = "cpu";
+ reg = <0>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 0>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply0>;
+ operating-points-v2 = <&cpu_opp_table>;
+ };
+
+ cpu@1 {
+ compatible = "qcom,krait";
+ device_type = "cpu";
+ reg = <1>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 1>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply1>;
+ operating-points-v2 = <&cpu_opp_table>;
+ };
+
+ cpu@2 {
+ compatible = "qcom,krait";
+ device_type = "cpu";
+ reg = <2>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 2>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply2>;
+ operating-points-v2 = <&cpu_opp_table>;
+ };
+
+ cpu@3 {
+ compatible = "qcom,krait";
+ device_type = "cpu";
+ reg = <3>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 3>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply3>;
+ operating-points-v2 = <&cpu_opp_table>;
+ };
+ };
+
+ cpu_opp_table: opp-table {
+ compatible = "operating-points-v2";
+
+ /*
+ * Missing opp-shared property means CPUs switch DVFS states
+ * independently.
+ */
+
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <975000 970000 985000>;
+ opp-microamp = <70000>;
+ clock-latency-ns = <300000>;
+ opp-suspend;
+ };
+ opp-1100000000 {
+ opp-hz = /bits/ 64 <1100000000>;
+ opp-microvolt = <1000000 980000 1010000>;
+ opp-microamp = <80000>;
+ clock-latency-ns = <310000>;
+ };
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <1025000>;
+ opp-microamp = <90000>;
+ lock-latency-ns = <290000>;
+ turbo-mode;
+ };
+ };
+
+ - |
+ /*
+ * Example 3: Dual-cluster, Dual-core per cluster. CPUs within a cluster switch
+ * DVFS state together.
+ */
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "arm,cortex-a7";
+ device_type = "cpu";
+ reg = <0>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 0>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply0>;
+ operating-points-v2 = <&cluster0_opp>;
+ };
+
+ cpu@1 {
+ compatible = "arm,cortex-a7";
+ device_type = "cpu";
+ reg = <1>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 0>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply0>;
+ operating-points-v2 = <&cluster0_opp>;
+ };
+
+ cpu@100 {
+ compatible = "arm,cortex-a15";
+ device_type = "cpu";
+ reg = <100>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 1>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply1>;
+ operating-points-v2 = <&cluster1_opp>;
+ };
+
+ cpu@101 {
+ compatible = "arm,cortex-a15";
+ device_type = "cpu";
+ reg = <101>;
+ next-level-cache = <&L2>;
+ clocks = <&clk_controller 1>;
+ clock-names = "cpu";
+ cpu-supply = <&cpu_supply1>;
+ operating-points-v2 = <&cluster1_opp>;
+ };
+ };
+
+ cluster0_opp: opp-table-0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <975000 970000 985000>;
+ opp-microamp = <70000>;
+ clock-latency-ns = <300000>;
+ opp-suspend;
+ };
+ opp-1100000000 {
+ opp-hz = /bits/ 64 <1100000000>;
+ opp-microvolt = <1000000 980000 1010000>;
+ opp-microamp = <80000>;
+ clock-latency-ns = <310000>;
+ };
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt = <1025000>;
+ opp-microamp = <90000>;
+ clock-latency-ns = <290000>;
+ turbo-mode;
+ };
+ };
+
+ cluster1_opp: opp-table-1 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-1300000000 {
+ opp-hz = /bits/ 64 <1300000000>;
+ opp-microvolt = <1050000 1045000 1055000>;
+ opp-microamp = <95000>;
+ clock-latency-ns = <400000>;
+ opp-suspend;
+ };
+ opp-1400000000 {
+ opp-hz = /bits/ 64 <1400000000>;
+ opp-microvolt = <1075000>;
+ opp-microamp = <100000>;
+ clock-latency-ns = <400000>;
+ };
+ opp-1500000000 {
+ opp-hz = /bits/ 64 <1500000000>;
+ opp-microvolt = <1100000 1010000 1110000>;
+ opp-microamp = <95000>;
+ clock-latency-ns = <400000>;
+ turbo-mode;
+ };
+ };
+
+ - |
+ /* Example 4: Handling multiple regulators */
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "foo,cpu-type";
+ device_type = "cpu";
+ reg = <0>;
+
+ vcc0-supply = <&cpu_supply0>;
+ vcc1-supply = <&cpu_supply1>;
+ vcc2-supply = <&cpu_supply2>;
+ operating-points-v2 = <&cpu0_opp_table4>;
+ };
+ };
+
+ cpu0_opp_table4: opp-table-0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <970000>, /* Supply 0 */
+ <960000>, /* Supply 1 */
+ <960000>; /* Supply 2 */
+ opp-microamp = <70000>, /* Supply 0 */
+ <70000>, /* Supply 1 */
+ <70000>; /* Supply 2 */
+ clock-latency-ns = <300000>;
+ };
+
+ /* OR */
+
+ opp-1000000001 {
+ opp-hz = /bits/ 64 <1000000001>;
+ opp-microvolt = <975000 970000 985000>, /* Supply 0 */
+ <965000 960000 975000>, /* Supply 1 */
+ <965000 960000 975000>; /* Supply 2 */
+ opp-microamp = <70000>, /* Supply 0 */
+ <70000>, /* Supply 1 */
+ <70000>; /* Supply 2 */
+ clock-latency-ns = <300000>;
+ };
+
+ /* OR */
+
+ opp-1000000002 {
+ opp-hz = /bits/ 64 <1000000002>;
+ opp-microvolt = <975000 970000 985000>, /* Supply 0 */
+ <965000 960000 975000>, /* Supply 1 */
+ <965000 960000 975000>; /* Supply 2 */
+ opp-microamp = <70000>, /* Supply 0 */
+ <0>, /* Supply 1 doesn't need this */
+ <70000>; /* Supply 2 */
+ clock-latency-ns = <300000>;
+ };
+ };
+
+ - |
+ /*
+ * Example 5: opp-supported-hw
+ * (example: three level hierarchy of versions: cuts, substrate and process)
+ */
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "arm,cortex-a7";
+ device_type = "cpu";
+ reg = <0>;
+ cpu-supply = <&cpu_supply>;
+ operating-points-v2 = <&cpu0_opp_table_slow>;
+ };
+ };
+
+ cpu0_opp_table_slow: opp-table {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-600000000 {
+ /*
+ * Supports all substrate and process versions for 0xF
+ * cuts, i.e. only first four cuts.
+ */
+ opp-supported-hw = <0xF 0xFFFFFFFF 0xFFFFFFFF>;
+ opp-hz = /bits/ 64 <600000000>;
+ };
+
+ opp-800000000 {
+ /*
+ * Supports:
+ * - cuts: only one, 6th cut (represented by 6th bit).
+ * - substrate: supports 16 different substrate versions
+ * - process: supports 9 different process versions
+ */
+ opp-supported-hw = <0x20 0xff0000ff 0x0000f4f0>;
+ opp-hz = /bits/ 64 <800000000>;
+ };
+
+ opp-900000000 {
+ /*
+ * Supports:
+ * - All cuts and substrate where process version is 0x2.
+ * - All cuts and process where substrate version is 0x2.
+ */
+ opp-supported-hw = <0xFFFFFFFF 0xFFFFFFFF 0x02>,
+ <0xFFFFFFFF 0x01 0xFFFFFFFF>;
+ opp-hz = /bits/ 64 <900000000>;
+ };
+ };
+
+ - |
+ /*
+ * Example 6: opp-microvolt-<name>, opp-microamp-<name>:
+ * (example: device with two possible microvolt ranges: slow and fast)
+ */
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "arm,cortex-a7";
+ device_type = "cpu";
+ reg = <0>;
+ operating-points-v2 = <&cpu0_opp_table6>;
+ };
+ };
+
+ cpu0_opp_table6: opp-table-0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt-slow = <915000 900000 925000>;
+ opp-microvolt-fast = <975000 970000 985000>;
+ opp-microamp-slow = <70000>;
+ opp-microamp-fast = <71000>;
+ };
+
+ opp-1200000000 {
+ opp-hz = /bits/ 64 <1200000000>;
+ opp-microvolt-slow = <915000 900000 925000>, /* Supply vcc0 */
+ <925000 910000 935000>; /* Supply vcc1 */
+ opp-microvolt-fast = <975000 970000 985000>, /* Supply vcc0 */
+ <965000 960000 975000>; /* Supply vcc1 */
+ opp-microamp = <70000>; /* Will be used for both slow/fast */
+ };
+ };
+
+ - |
+ /*
+ * Example 7: Single cluster Quad-core ARM cortex A53, OPP points from firmware,
+ * distinct clock controls but two sets of clock/voltage/current lines.
+ */
+ cpus {
+ #address-cells = <2>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "arm,cortex-a53";
+ device_type = "cpu";
+ reg = <0x0 0x100>;
+ next-level-cache = <&A53_L2>;
+ clocks = <&dvfs_controller 0>;
+ operating-points-v2 = <&cpu_opp0_table>;
+ };
+ cpu@1 {
+ compatible = "arm,cortex-a53";
+ device_type = "cpu";
+ reg = <0x0 0x101>;
+ next-level-cache = <&A53_L2>;
+ clocks = <&dvfs_controller 1>;
+ operating-points-v2 = <&cpu_opp0_table>;
+ };
+ cpu@2 {
+ compatible = "arm,cortex-a53";
+ device_type = "cpu";
+ reg = <0x0 0x102>;
+ next-level-cache = <&A53_L2>;
+ clocks = <&dvfs_controller 2>;
+ operating-points-v2 = <&cpu_opp1_table>;
+ };
+ cpu@3 {
+ compatible = "arm,cortex-a53";
+ device_type = "cpu";
+ reg = <0x0 0x103>;
+ next-level-cache = <&A53_L2>;
+ clocks = <&dvfs_controller 3>;
+ operating-points-v2 = <&cpu_opp1_table>;
+ };
+
+ };
+
+ cpu_opp0_table: opp-table-0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+ };
+
+ cpu_opp1_table: opp-table-1 {
+ compatible = "operating-points-v2";
+ opp-shared;
+ };
+...
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 16:22:17 +0000