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- 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>;
- };
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