1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/regulator/fixed-regulator.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Fixed Voltage regulators 8 9maintainers: 10 - Liam Girdwood <lgirdwood@gmail.com> 11 - Mark Brown <broonie@kernel.org> 12 13description: 14 Any property defined as part of the core regulator binding, defined in 15 regulator.yaml, can also be used. However a fixed voltage regulator is 16 expected to have the regulator-min-microvolt and regulator-max-microvolt 17 to be the same. 18 19allOf: 20 - $ref: regulator.yaml# 21 - if: 22 properties: 23 compatible: 24 contains: 25 const: regulator-fixed-clock 26 then: 27 required: 28 - clocks 29 - if: 30 properties: 31 compatible: 32 contains: 33 const: regulator-fixed-domain 34 then: 35 required: 36 - power-domains 37 - required-opps 38 - not: 39 required: 40 - gpio 41 - gpios 42 43properties: 44 compatible: 45 enum: 46 - regulator-fixed 47 - regulator-fixed-clock 48 - regulator-fixed-domain 49 50 regulator-name: true 51 52 gpio: 53 description: gpio to use for enable control 54 maxItems: 1 55 56 gpios: 57 maxItems: 1 58 59 clocks: 60 description: 61 clock to use for enable control. This binding is only available if 62 the compatible is chosen to regulator-fixed-clock. The clock binding 63 is mandatory if compatible is chosen to regulator-fixed-clock. 64 maxItems: 1 65 66 power-domains: 67 deprecated: true 68 description: 69 Power domain to use for enable control. This binding is only 70 available if the compatible is chosen to regulator-fixed-domain. 71 maxItems: 1 72 73 required-opps: 74 deprecated: true 75 description: 76 Performance state to use for enable control. This binding is only 77 available if the compatible is chosen to regulator-fixed-domain. The 78 power-domain binding is mandatory if compatible is chosen to 79 regulator-fixed-domain. 80 maxItems: 1 81 82 startup-delay-us: 83 description: startup time in microseconds 84 85 off-on-delay-us: 86 description: off delay time in microseconds 87 88 enable-active-high: 89 description: 90 Polarity of GPIO is Active high. If this property is missing, 91 the default assumed is Active low. 92 type: boolean 93 94 gpio-open-drain: 95 description: 96 GPIO is open drain type. If this property is missing then default 97 assumption is false. 98 type: boolean 99 100 vin-supply: 101 description: Input supply phandle. 102 103 interrupts: 104 maxItems: 1 105 description: 106 Interrupt signaling a critical under-voltage event. 107 108 system-critical-regulator: true 109 110required: 111 - compatible 112 - regulator-name 113 114unevaluatedProperties: false 115 116examples: 117 - | 118 reg_1v8: regulator-1v8 { 119 compatible = "regulator-fixed"; 120 regulator-name = "1v8"; 121 regulator-min-microvolt = <1800000>; 122 regulator-max-microvolt = <1800000>; 123 gpio = <&gpio1 16 0>; 124 startup-delay-us = <70000>; 125 enable-active-high; 126 regulator-boot-on; 127 gpio-open-drain; 128 vin-supply = <&parent_reg>; 129 }; 130 reg_1v8_clk: regulator-1v8-clk { 131 compatible = "regulator-fixed-clock"; 132 regulator-name = "1v8"; 133 regulator-min-microvolt = <1800000>; 134 regulator-max-microvolt = <1800000>; 135 clocks = <&clock1>; 136 startup-delay-us = <70000>; 137 enable-active-high; 138 regulator-boot-on; 139 vin-supply = <&parent_reg>; 140 }; 141 reg_1v8_domain: regulator-1v8-domain { 142 compatible = "regulator-fixed-domain"; 143 regulator-name = "1v8"; 144 regulator-min-microvolt = <1800000>; 145 regulator-max-microvolt = <1800000>; 146 power-domains = <&domain1>; 147 required-opps = <&domain1_state1>; 148 startup-delay-us = <70000>; 149 enable-active-high; 150 regulator-boot-on; 151 vin-supply = <&parent_reg>; 152 }; 153... 154