50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
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
|
|
immediately 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>;
|
|
};
|