linux-kernel - [PATCH 10/15] dt-bindings: iio: adc: adi,ad4030: Add adi,clock-mode

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Message-ID: <1acb071f7140c9d44ed616a9eaea00b0ee423164.1756511030.git.marcelo.schmitt@analog.com>
Date: Fri, 29 Aug 2025 21:43:55 -0300
From: Marcelo Schmitt <marcelo.schmitt@...log.com>
To: <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-spi@...r.kernel.org>
CC: <jic23@...nel.org>, <Michael.Hennerich@...log.com>, <nuno.sa@...log.com>,
        <eblanc@...libre.com>, <dlechner@...libre.com>, <andy@...nel.org>,
        <corbet@....net>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <broonie@...nel.org>,
        <Jonathan.Cameron@...wei.com>, <andriy.shevchenko@...ux.intel.com>,
        <ahaslam@...libre.com>, <sergiu.cuciurean@...log.com>,
        <marcelo.schmitt1@...il.com>
Subject: [PATCH 10/15] dt-bindings: iio: adc: adi,ad4030: Add adi,clock-mode

AD4030 and similar designs support three different options for the clock
that frames ADC output data. Each option implies a different hardware
configuration for reading ADC data. Document AD4030 clock mode options.

Co-developed-by: Sergiu Cuciurean <sergiu.cuciurean@...log.com>
Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@...log.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@...log.com>
---
 .../devicetree/bindings/iio/adc/adi,ad4030.yaml      | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
index bee85087a7b2..1e4e025b835f 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
@@ -78,6 +78,18 @@ properties:
   interrupt-names:
     const: busy
 
+  adi,clock-mode:
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ spi, echo, host ]
+    default: spi
+    description:
+      Describes how the clock that frames ADC data output is setup.
+      spi  - Spi-compatible. Normal SPI operation clocking.
+      echo - Echo-clock. Synchronous clock echoing to ease timing requirements
+             when using isolation on the digital interface.
+      host - Host. The Host clock mode uses an internal oscillator to clock out
+             the data bits. In this mode, the spi controller is not driving SCLK.
+
 required:
   - compatible
   - reg
-- 
2.39.2