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Message-Id: <20251121-ads1x18-v1-1-86db080fc9a4@gmail.com>
Date: Fri, 21 Nov 2025 12:16:14 -0500
From: Kurt Borja <kuurtb@...il.com>
To: Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Tobias Sperling <tobias.sperling@...ting.com>
Cc: David Lechner <dlechner@...libre.com>,
Nuno Sá <nuno.sa@...log.com>,
Andy Shevchenko <andy@...nel.org>, linux-iio@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Kurt Borja <kuurtb@...il.com>
Subject: [PATCH 1/2] dt-bindings: iio: adc: Add TI ADS1018/ADS1118
Add documentation for Texas Instruments ADS1018 and ADS1118
analog-to-digital converters.
Signed-off-by: Kurt Borja <kuurtb@...il.com>
---
.../devicetree/bindings/iio/adc/ti,ads1118.yaml | 132 +++++++++++++++++++++
1 file changed, 132 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1118.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads1118.yaml
new file mode 100644
index 000000000000..eb7228ed6ddb
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1118.yaml
@@ -0,0 +1,132 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,ads1118.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI ADS1018/ADS1118 SPI analog to digital converter
+
+maintainers:
+ - Kurt Borja <kuurtb@...il.com>
+
+description: |
+ The ADS1018/ADS1118 is a precision, low-power, 12-bit or 16-bit, noise-free,
+ analog-to-digital converter (ADC). It integrates a programmable gain amplifier
+ (PGA), voltage reference, oscillator and high-accuracy temperature sensor.
+
+ Datasheets:
+ - ADS1018: https://www.ti.com/lit/ds/symlink/ads1018.pdf
+ - ADS1118: https://www.ti.com/lit/ds/symlink/ads1118.pdf
+
+properties:
+ compatible:
+ enum:
+ - ti,ads1018
+ - ti,ads1118
+
+ reg:
+ maxitems: 1
+
+ interrupts:
+ description: DOUT/DRDY (Data Out/Data Ready) line.
+ maxitems: 1
+
+ drdy-gpios:
+ description:
+ Extra GPIO line connected to DOUT/DRDY (Data Out/Data Ready). This allows
+ distinguishing between latched and real DRDY IRQs.
+ maxitems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ '#io-channel-cells':
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - drdy-gpios
+ - '#address-cells'
+ - '#size-cells'
+
+patternProperties:
+ "^channel@[0-7]$":
+ type: object
+ $ref: /schemas/iio/adc/adc.yaml#
+ description: Properties for a single ADC channel.
+
+ properties:
+ reg:
+ minimum: 0
+ maximum: 7
+ description: The channel index (0-7).
+
+ ti,gain:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 5
+ description:
+ Programmable gain amplifier configuration, as described in the PGA
+ Config Register Field description. If not present, the default is
+ used.
+
+ ti,datarate:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 7
+ description:
+ Data rate configuration, as described in the DR Config Register Field
+ description. If not present, the default is used.
+
+ required:
+ - reg
+
+ additionalProperties: false
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: ti,ads1018
+ then:
+ patternProperties:
+ "^channel@[0-7]$":
+ properties:
+ ti,datarate:
+ maximum: 6
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ spi0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ads1118@0 {
+ compatible = "ti,ads1118";
+ reg = <0>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ spi-max-frequency = <4000000>;
+ spi-cpha;
+
+ interrupts-extended = <&gpio 14 IRQ_TYPE_EDGE_FALLING>;
+ drdy-gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+
+ channel@4 {
+ reg = <4>;
+ ti,gain = <0>;
+ ti,datarate = <7>;
+ };
+ };
+ };
--
2.52.0
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