Kernel-4.18.0-80.el8_vctrl

Bindings for Voltage controlled regulators

Required properties:

• compatible : must be “vctrl-regulator”.
• regulator-min-microvolt : smallest voltage consumers may set
• regulator-max-microvolt : largest voltage consumers may set
• ctrl-supply : The regulator supplying the control voltage.
• ctrl-voltage-range : an array of two integer values describing the range

            (min/max) of the control voltage. The values specify
            the control voltage needed to generate the corresponding
            regulator-min/max-microvolt output voltage.
  

Optional properties:

• ovp-threshold-percent : overvoltage protection (OVP) threshold of the

          regulator in percent. Some regulators have an OVP
          circuitry which shuts down the regulator when the
          actual output voltage deviates beyond a certain
          margin from the expected value for a given control
          voltage. On larger voltage decreases this can occur
          undesiredly since the output voltage does not adjust
          inmediately to changes in the control voltage. To
          avoid this situation the vctrl driver breaks down
          larger voltage decreases into multiple steps, where
          each step is within the OVP threshold.
  

• min-slew-down-rate : Describes how slowly the regulator voltage will decay

          down in the worst case (lightest expected load).
          Specified in uV / us (like main regulator ramp rate).
          This value is required when ovp-threshold-percent is
          specified.
  

Example:

vctrl-reg {
    compatible = "vctrl-regulator";
    regulator-name = "vctrl_reg";

    ctrl-supply = <&ctrl_reg>;

    regulator-min-microvolt = <800000>;
    regulator-max-microvolt = <1500000>;

    ctrl-voltage-range = <200000 500000>;

    min-slew-down-rate = <225>;
    ovp-threshold-percent = <16>;
};