[deliverable/linux.git] / Documentation / devicetree / bindings / regulator / fixed-regulator.txt

Fixed Voltage regulators

Required properties:
- compatible: Must be "regulator-fixed";

Optional properties:
- gpio: gpio to use for enable control
- startup-delay-us: startup time in microseconds
- enable-active-high: Polarity of GPIO is Active high
If this property is missing, the default assumed is Active low.
- gpio-open-drain: GPIO is open drain type.
  If this property is missing then default assumption is false.
-vin-supply: Input supply name.

Any property defined as part of the core regulator
binding, defined in regulator.txt, can also be used.
However a fixed voltage regulator is expected to have the
regulator-min-microvolt and regulator-max-microvolt
to be the same.

Example:

	abc: fixedregulator@0 {
		compatible = "regulator-fixed";
		regulator-name = "fixed-supply";
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <1800000>;
		gpio = <&gpio1 16 0>;
		startup-delay-us = <70000>;
		enable-active-high;
		regulator-boot-on;
		gpio-open-drain;
		vin-supply = <&parent_reg>;
	};
Commit	Line	Data
cef49102 RN	1	Fixed Voltage regulators
	2
	3	Required properties:
	4	- compatible: Must be "regulator-fixed";
	5
	6	Optional properties:
	7	- gpio: gpio to use for enable control
	8	- startup-delay-us: startup time in microseconds
	9	- enable-active-high: Polarity of GPIO is Active high
	10	If this property is missing, the default assumed is Active low.
9a50dba5 LD	11	- gpio-open-drain: GPIO is open drain type.
9a50dba5 LD	12	If this property is missing then default assumption is false.
6be5bfc3	13	-vin-supply: Input supply name.
cef49102 RN	14
	15	Any property defined as part of the core regulator
	16	binding, defined in regulator.txt, can also be used.
	17	However a fixed voltage regulator is expected to have the
	18	regulator-min-microvolt and regulator-max-microvolt
	19	to be the same.
	20
	21	Example:
	22
	23	abc: fixedregulator@0 {
	24	compatible = "regulator-fixed";
	25	regulator-name = "fixed-supply";
	26	regulator-min-microvolt = <1800000>;
	27	regulator-max-microvolt = <1800000>;
	28	gpio = <&gpio1 16 0>;
	29	startup-delay-us = <70000>;
	30	enable-active-high;
9a50dba5 LD	31	regulator-boot-on;
9a50dba5 LD	32	gpio-open-drain;
6be5bfc3	33	vin-supply = <&parent_reg>;
cef49102	34	};