Based on kernel version 6.11
. Page generated on 2024-09-24 08:21 EST
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2 --- $id: http://devicetree.org/schemas/mfd/gateworks-gsc.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Gateworks System Controller description: | The Gateworks System Controller (GSC) is a device present across various Gateworks product families that provides a set of system related features such as the following (refer to the board hardware user manuals to see what features are present) - Watchdog Timer - GPIO - Pushbutton controller - Hardware monitor with ADC's for temperature and voltage rails and fan controller maintainers: - Tim Harvey <tharvey@gateworks.com> properties: $nodename: pattern: "gsc@[0-9a-f]{1,2}" compatible: const: gw,gsc reg: description: I2C device address maxItems: 1 interrupts: maxItems: 1 interrupt-controller: true "#interrupt-cells": const: 1 "#address-cells": const: 1 "#size-cells": const: 0 adc: type: object additionalProperties: false description: Optional hardware monitoring module properties: compatible: const: gw,gsc-adc "#address-cells": const: 1 "#size-cells": const: 0 patternProperties: "^channel@[0-9a-f]+$": type: object additionalProperties: false description: | Properties for a single ADC which can report cooked values (i.e. temperature sensor based on thermister), raw values (i.e. voltage rail with a pre-scaling resistor divider). properties: reg: description: Register of the ADC maxItems: 1 label: description: Name of the ADC input gw,mode: description: | conversion mode: 0 - temperature, in C*10 1 - pre-scaled 24-bit voltage value 2 - scaled voltage based on an optional resistor divider and optional offset 3 - pre-scaled 16-bit voltage value 4 - fan tach input to report RPM's $ref: /schemas/types.yaml#/definitions/uint32 enum: [0, 1, 2, 3, 4] gw,voltage-divider-ohms: description: Values of resistors for divider on raw ADC input maxItems: 2 items: minimum: 1000 maximum: 1000000 gw,voltage-offset-microvolt: description: | A positive voltage offset to apply to a raw ADC (i.e. to compensate for a diode drop). minimum: 0 maximum: 1000000 required: - gw,mode - reg - label required: - compatible - "#address-cells" - "#size-cells" patternProperties: "^fan-controller@[0-9a-f]+$": type: object additionalProperties: false description: Optional fan controller properties: compatible: const: gw,gsc-fan reg: description: The fan controller base address maxItems: 1 required: - compatible - reg required: - compatible - reg - interrupts - interrupt-controller - "#interrupt-cells" - "#address-cells" - "#size-cells" additionalProperties: false examples: - | #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/interrupt-controller/irq.h> i2c { #address-cells = <1>; #size-cells = <0>; gsc@20 { compatible = "gw,gsc"; reg = <0x20>; interrupt-parent = <&gpio1>; interrupts = <4 IRQ_TYPE_LEVEL_LOW>; interrupt-controller; #interrupt-cells = <1>; #address-cells = <1>; #size-cells = <0>; adc { compatible = "gw,gsc-adc"; #address-cells = <1>; #size-cells = <0>; channel@0 { /* A0: Board Temperature */ reg = <0x00>; label = "temp"; gw,mode = <0>; }; channel@2 { /* A1: Input Voltage (raw ADC) */ reg = <0x02>; label = "vdd_vin"; gw,mode = <1>; gw,voltage-divider-ohms = <22100 1000>; gw,voltage-offset-microvolt = <800000>; }; channel@b { /* A2: Battery voltage */ reg = <0x0b>; label = "vdd_bat"; gw,mode = <1>; }; }; fan-controller@2c { compatible = "gw,gsc-fan"; reg = <0x2c>; }; }; }; |