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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/fixed-regulator.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Fixed Voltage regulators
maintainers:
- Liam Girdwood <lgirdwood@gmail.com>
- Mark Brown <broonie@kernel.org>
description:
Any property defined as part of the core regulator binding, defined in
regulator.yaml, 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.
allOf:
- $ref: regulator.yaml#
- if:
properties:
compatible:
contains:
const: regulator-fixed-clock
then:
required:
- clocks
- if:
properties:
compatible:
contains:
const: regulator-fixed-domain
then:
required:
- power-domains
- required-opps
- not:
required:
- gpio
- gpios
properties:
compatible:
enum:
- regulator-fixed
- regulator-fixed-clock
- regulator-fixed-domain
regulator-name: true
gpio:
description: gpio to use for enable control
maxItems: 1
gpios:
maxItems: 1
clocks:
description:
clock to use for enable control. This binding is only available if
the compatible is chosen to regulator-fixed-clock. The clock binding
is mandatory if compatible is chosen to regulator-fixed-clock.
maxItems: 1
power-domains:
deprecated: true
description:
Power domain to use for enable control. This binding is only
available if the compatible is chosen to regulator-fixed-domain.
maxItems: 1
required-opps:
deprecated: true
description:
Performance state to use for enable control. This binding is only
available if the compatible is chosen to regulator-fixed-domain. The
power-domain binding is mandatory if compatible is chosen to
regulator-fixed-domain.
maxItems: 1
startup-delay-us:
description: startup time in microseconds
off-on-delay-us:
description: off delay time in microseconds
enable-active-high:
description:
Polarity of GPIO is Active high. If this property is missing,
the default assumed is Active low.
type: boolean
gpio-open-drain:
description:
GPIO is open drain type. If this property is missing then default
assumption is false.
type: boolean
vin-supply:
description: Input supply phandle.
interrupts:
maxItems: 1
description:
Interrupt signaling a critical under-voltage event.
system-critical-regulator: true
required:
- compatible
- regulator-name
unevaluatedProperties: false
examples:
- |
reg_1v8: regulator-1v8 {
compatible = "regulator-fixed";
regulator-name = "1v8";
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>;
};
reg_1v8_clk: regulator-1v8-clk {
compatible = "regulator-fixed-clock";
regulator-name = "1v8";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
clocks = <&clock1>;
startup-delay-us = <70000>;
enable-active-high;
regulator-boot-on;
vin-supply = <&parent_reg>;
};
reg_1v8_domain: regulator-1v8-domain {
compatible = "regulator-fixed-domain";
regulator-name = "1v8";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
power-domains = <&domain1>;
required-opps = <&domain1_state1>;
startup-delay-us = <70000>;
enable-active-high;
regulator-boot-on;
vin-supply = <&parent_reg>;
};
...
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