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From:   Mike Looijmans <mike.looijmans@topic.nl>
To:     devicetree@vger.kernel.org, linux-iio@vger.kernel.org
CC:     Mike Looijmans <mike.looijmans@topic.nl>,
        Conor Dooley <conor+dt@kernel.org>,
        Jonathan Cameron <jic23@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Rob Herring <robh+dt@kernel.org>, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] dt-bindings: iio: adc: ti-ads1298: Add driver
Date:   Wed, 13 Dec 2023 10:47:21 +0100
Message-ID: <20231213094722.31547-1-mike.looijmans@topic.nl>
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Skeleton driver for the TI ADS1298 medical ADC. This device is
typically used for ECG and similar measurements. Supports data
acquisition at configurable scale and sampling frequency.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>

---

 .../bindings/iio/adc/ti,ads1298.yaml          | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads1298.ya=
ml

diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml b/Do=
cumentation/devicetree/bindings/iio/adc/ti,ads1298.yaml
new file mode 100644
index 000000000000..7a160ba721eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,ads1298.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments' ads1298 medical ADC chips
+
+maintainers:
+  - Mike Looijmans <mike.looijmans@topic.nl>
+
+properties:
+  compatible:
+    enum:
+      - ti,ads1298
+
+  reg:
+    maxItems: 1
+
+  spi-cpha: true
+
+  reset-gpios:
+    maxItems: 1
+
+  avdd-supply:
+    description:
+      Analog power supply, voltage between AVDD and AVSS. When providing a
+      symmetric +/- 2.5V, the regulator should report 5V.
+
+  vref-supply:
+    description:
+      Optional reference voltage. If omitted, internal reference is used,
+      depending on analog supply this is 2.4 or 4V.
+
+  clocks:
+    description: Optional 2.048 MHz external source clock on CLK pin
+    maxItems: 1
+
+  clock-names:
+    const: clk
+
+  interrupts:
+    description: Interrupt on DRDY pin, triggers on falling edge
+    maxItems: 1
+
+  label: true
+
+required:
+  - compatible
+  - reg
+  - avdd-supply
+  - interrupts
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi {
+        #address-cells =3D <1>;
+        #size-cells =3D <0>;
+
+        adc@1 {
+          reg =3D <1>;
+          compatible =3D "ti,ads1298";
+          label =3D "ads1298-1-ecg";
+          avdd-supply =3D <&reg_iso_5v_a>;
+          clock-names =3D "clk";
+          clocks =3D <&clk_ads1298>;
+          interrupt-parent =3D <&gpio0>;
+          interrupts =3D <78 IRQ_TYPE_EDGE_FALLING>;
+          spi-max-frequency =3D <20000000>;
+          spi-cpha;
+        };
+    };
+...
--=20
2.34.1


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