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50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
Bindings for Voltage controlled regulators
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==========================================
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Required properties:
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--------------------
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- compatible : must be "vctrl-regulator".
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- regulator-min-microvolt : smallest voltage consumers may set
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- regulator-max-microvolt : largest voltage consumers may set
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- ctrl-supply : The regulator supplying the control voltage.
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- ctrl-voltage-range : an array of two integer values describing the range
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(min/max) of the control voltage. The values specify
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the control voltage needed to generate the corresponding
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regulator-min/max-microvolt output voltage.
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Optional properties:
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--------------------
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- ovp-threshold-percent : overvoltage protection (OVP) threshold of the
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regulator in percent. Some regulators have an OVP
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circuitry which shuts down the regulator when the
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actual output voltage deviates beyond a certain
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margin from the expected value for a given control
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voltage. On larger voltage decreases this can occur
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undesiredly since the output voltage does not adjust
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inmediately to changes in the control voltage. To
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avoid this situation the vctrl driver breaks down
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larger voltage decreases into multiple steps, where
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each step is within the OVP threshold.
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- min-slew-down-rate : Describes how slowly the regulator voltage will decay
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down in the worst case (lightest expected load).
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Specified in uV / us (like main regulator ramp rate).
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This value is required when ovp-threshold-percent is
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specified.
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Example:
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vctrl-reg {
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compatible = "vctrl-regulator";
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regulator-name = "vctrl_reg";
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ctrl-supply = <&ctrl_reg>;
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regulator-min-microvolt = <800000>;
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regulator-max-microvolt = <1500000>;
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ctrl-voltage-range = <200000 500000>;
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min-slew-down-rate = <225>;
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ovp-threshold-percent = <16>;
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};
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