| 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>; |
| }; |
