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>; };