88 lines · yaml
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/iio/adc/ti,adc12138.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Texas Instruments ADC12138 and similar self-calibrating ADCs8 9maintainers:10 - Akinobu Mita <akinobu.mita@gmail.com>11 12description: |13 13 bit ADCs with 1, 2 or 8 inputs and self calibrating circuitry to14 correct for linearity, zero and full scale errors.15 16properties:17 compatible:18 enum:19 - ti,adc1213020 - ti,adc1213221 - ti,adc1213822 23 reg:24 maxItems: 125 26 interrupts:27 maxItems: 128 description: End of Conversion (EOC) interrupt29 30 clocks:31 maxItems: 132 description: Conversion clock input.33 34 vref-p-supply:35 description: The regulator supply for positive analog voltage reference36 37 vref-n-supply:38 description: |39 The regulator supply for negative analog voltage reference40 (Note that this must not go below GND or exceed vref-p)41 If not specified, this is assumed to be analog ground.42 43 ti,acquisition-time:44 $ref: /schemas/types.yaml#/definitions/uint3245 enum: [ 6, 10, 18, 34 ]46 description: |47 The number of conversion clock periods for the S/H's acquisition time.48 For high source impedances, this value can be increased to 18 or 34.49 For less ADC accuracy and/or slower CCLK frequencies this value may be50 decreased to 6. See section 6.0 INPUT SOURCE RESISTANCE in the51 datasheet for details.52 53 "#io-channel-cells":54 const: 155 56required:57 - compatible58 - reg59 - interrupts60 - clocks61 - vref-p-supply62 63allOf:64 - $ref: /schemas/spi/spi-peripheral-props.yaml#65 66unevaluatedProperties: false67 68examples:69 - |70 #include <dt-bindings/interrupt-controller/irq.h>71 spi {72 #address-cells = <1>;73 #size-cells = <0>;74 75 adc@0 {76 compatible = "ti,adc12138";77 reg = <0>;78 interrupts = <28 IRQ_TYPE_EDGE_RISING>;79 interrupt-parent = <&gpio1>;80 clocks = <&cclk>;81 vref-p-supply = <&ldo4_reg>;82 spi-max-frequency = <5000000>;83 ti,acquisition-time = <6>;84 #io-channel-cells = <1>;85 };86 };87...88