1 Bindings for Voltage controlled regulators
2 ==========================================
3
4 Required properties:
5 --------------------
6 - compatible : must be "vctrl-regulator".
7 - regulator-min-microvolt : smallest voltage consumers may set
8 - regulator-max-microvolt : largest voltage consumers may set
9 - ctrl-supply : The regulator supplying the control voltage.
10 - ctrl-voltage-range : an array of two integer values describing the range
11 (min/max) of the control voltage. The values specify
12 the control voltage needed to generate the corresponding
13 regulator-min/max-microvolt output voltage.
14
15 Optional properties:
16 --------------------
17 - ovp-threshold-percent : overvoltage protection (OVP) threshold of the
18 regulator in percent. Some regulators have an OVP
19 circuitry which shuts down the regulator when the
20 actual output voltage deviates beyond a certain
21 margin from the expected value for a given control
22 voltage. On larger voltage decreases this can occur
23 undesiredly since the output voltage does not adjust
24 immediately to changes in the control voltage. To
25 avoid this situation the vctrl driver breaks down
26 larger voltage decreases into multiple steps, where
27 each step is within the OVP threshold.
28 - min-slew-down-rate : Describes how slowly the regulator voltage will decay
29 down in the worst case (lightest expected load).
30 Specified in uV / us (like main regulator ramp rate).
31 This value is required when ovp-threshold-percent is
32 specified.
33
34 Example:
35
36 vctrl-reg {
37 compatible = "vctrl-regulator";
38 regulator-name = "vctrl_reg";
39
40 ctrl-supply = <&ctrl_reg>;
41
42 regulator-min-microvolt = <800000>;
43 regulator-max-microvolt = <1500000>;
44
45 ctrl-voltage-range = <200000 500000>;
46
47 min-slew-down-rate = <225>;
48 ovp-threshold-percent = <16>;
49 };
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