1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/iio/adc/adc.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: IIO Common Properties for ADC Channels 8 9maintainers: 10 - Jonathan Cameron <jic23@kernel.org> 11 12description: 13 A few properties are defined in a common way ADC channels. 14 15properties: 16 $nodename: 17 pattern: "^channel(@[0-9a-f]+)?$" 18 description: 19 A channel index should match reg. 20 21 reg: 22 maxItems: 1 23 24 label: 25 $ref: /schemas/types.yaml#/definitions/string 26 description: Unique name to identify which channel this is. 27 28 bipolar: 29 $ref: /schemas/types.yaml#/definitions/flag 30 description: If provided, the channel is to be used in bipolar mode. 31 32 diff-channels: 33 $ref: /schemas/types.yaml#/definitions/uint32-array 34 maxItems: 2 35 minItems: 2 36 description: 37 Many ADCs have dual Muxes to allow different input pins to be routed 38 to both the positive and negative inputs of a differential ADC. 39 The first value specifies the positive input pin, the second 40 specifies the negative input pin. 41 42 settling-time-us: 43 description: 44 Time between enabling the channel and first stable readings. 45 46 oversampling-ratio: 47 $ref: /schemas/types.yaml#/definitions/uint32 48 description: 49 Oversampling is used as replacement of or addition to the low-pass filter. 50 In some cases, the desired filtering characteristics are a function the 51 device design and can interact with other characteristics such as 52 settling time. 53 54additionalProperties: true 55