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-Device Tree Clock bindins for CPU DVFS of Mediatek MT8173 SoC
-
-Required properties:
-- clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock names.
-- clock-names: Should contain the following:
- "cpu" - The multiplexer for clock input of CPU cluster.
- "intermediate" - A parent of "cpu" clock which is used as "intermediate" clock
- source (usually MAINPLL) when the original CPU PLL is under
- transition and not stable yet.
- Please refer to Documentation/devicetree/bindings/clk/clock-bindings.txt for
- generic clock consumer properties.
-- proc-supply: Regulator for Vproc of CPU cluster.
-
-Optional properties:
-- sram-supply: Regulator for Vsram of CPU cluster. When present, the cpufreq driver
- needs to do "voltage tracking" to step by step scale up/down Vproc and
- Vsram to fit SoC specific needs. When absent, the voltage scaling
- flow is handled by hardware, hence no software "voltage tracking" is
- needed.
-
-Example:
---------
- cpu0: cpu@0 {
- device_type = "cpu";
- compatible = "arm,cortex-a53";
- reg = <0x000>;
- enable-method = "psci";
- cpu-idle-states = <&CPU_SLEEP_0>;
- clocks = <&infracfg CLK_INFRA_CA53SEL>,
- <&apmixedsys CLK_APMIXED_MAINPLL>;
- clock-names = "cpu", "intermediate";
- };
-
- cpu1: cpu@1 {
- device_type = "cpu";
- compatible = "arm,cortex-a53";
- reg = <0x001>;
- enable-method = "psci";
- cpu-idle-states = <&CPU_SLEEP_0>;
- clocks = <&infracfg CLK_INFRA_CA53SEL>,
- <&apmixedsys CLK_APMIXED_MAINPLL>;
- clock-names = "cpu", "intermediate";
- };
-
- cpu2: cpu@100 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x100>;
- enable-method = "psci";
- cpu-idle-states = <&CPU_SLEEP_0>;
- clocks = <&infracfg CLK_INFRA_CA57SEL>,
- <&apmixedsys CLK_APMIXED_MAINPLL>;
- clock-names = "cpu", "intermediate";
- };
-
- cpu3: cpu@101 {
- device_type = "cpu";
- compatible = "arm,cortex-a57";
- reg = <0x101>;
- enable-method = "psci";
- cpu-idle-states = <&CPU_SLEEP_0>;
- clocks = <&infracfg CLK_INFRA_CA57SEL>,
- <&apmixedsys CLK_APMIXED_MAINPLL>;
- clock-names = "cpu", "intermediate";
- };
-
- &cpu0 {
- proc-supply = <&mt6397_vpca15_reg>;
- };
-
- &cpu1 {
- proc-supply = <&mt6397_vpca15_reg>;
- };
-
- &cpu2 {
- proc-supply = <&da9211_vcpu_reg>;
- sram-supply = <&mt6397_vsramca7_reg>;
- };
-
- &cpu3 {
- proc-supply = <&da9211_vcpu_reg>;
- sram-supply = <&mt6397_vsramca7_reg>;
- };