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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/ti,adc12138.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Texas Instruments ADC12138 and similar self-calibrating ADCs
maintainers:
- Akinobu Mita <akinobu.mita@gmail.com>
description: |
13 bit ADCs with 1, 2 or 8 inputs and self calibrating circuitry to
correct for linearity, zero and full scale errors.
properties:
compatible:
enum:
- ti,adc12130
- ti,adc12132
- ti,adc12138
reg:
maxItems: 1
interrupts:
maxItems: 1
description: End of Conversion (EOC) interrupt
clocks:
maxItems: 1
description: Conversion clock input.
spi-max-frequency: true
vref-p-supply:
description: The regulator supply for positive analog voltage reference
vref-n-supply:
description: |
The regulator supply for negative analog voltage reference
(Note that this must not go below GND or exceed vref-p)
If not specified, this is assumed to be analog ground.
ti,acquisition-time:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [ 6, 10, 18, 34 ]
description: |
The number of conversion clock periods for the S/H's acquisition time.
For high source impedances, this value can be increased to 18 or 34.
For less ADC accuracy and/or slower CCLK frequencies this value may be
decreased to 6. See section 6.0 INPUT SOURCE RESISTANCE in the
datasheet for details.
"#io-channel-cells":
const: 1
required:
- compatible
- reg
- interrupts
- clocks
- vref-p-supply
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
adc@0 {
compatible = "ti,adc12138";
reg = <0>;
interrupts = <28 IRQ_TYPE_EDGE_RISING>;
interrupt-parent = <&gpio1>;
clocks = <&cclk>;
vref-p-supply = <&ldo4_reg>;
spi-max-frequency = <5000000>;
ti,acquisition-time = <6>;
#io-channel-cells = <1>;
};
};
...
|
