[PATCH 1/3] dt-bindings: iio: adc: adi,ad7606: add SPI offload properties

Angelo Dureghello
2025-04-03T16:20:28Z

From: Angelo Dureghello <adureghello@baylibre.com>

Add #trigger-source-cells property to allow the BUSY output to be
used as a SPI offload trigger source to indicate when a sample is ready
to be read.

Macros are added to adi,ad7606.h for the cell values to help with
readability since they are arbitrary values.

Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
---
Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml | 8 ++++++++
include/dt-bindings/iio/adc/adi,ad7606.h | 9 +++++++++
2 files changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
index 52d3f1ce336783084d601d361779ebc766124f7a..29f12d650442b8ff2eb455306ce59a0e87867ddd 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
@@ -45,6 +45,14 @@ properties:
"#size-cells":
const: 0

+ '#trigger-source-cells':
+ description: |
+ Cell indicates the output signal: 0 = BUSY, 1 = FIRSTDATA.
+
+ For convenience, macros for these values are available in
+ dt-bindings/iio/adc/adi,ad7606.h.
+ const: 1
+
# According to the datasheet, "Data is clocked in from SDI on the falling
# edge of SCLK, while data is clocked out on DOUTA on the rising edge of
# SCLK". Also, even if not stated textually in the datasheet, it is made
diff --git a/include/dt-bindings/iio/adc/adi,ad7606.h b/include/dt-bindings/iio/adc/adi,ad7606.h
new file mode 100644
index 0000000000000000000000000000000000000000..f38a6d72b6dc2d4067c07d6a5c0377e526219e5c
--- /dev/null
+++ b/include/dt-bindings/iio/adc/adi,ad7606.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+
+#ifndef _DT_BINDINGS_ADI_AD7606_H
+#define _DT_BINDINGS_ADI_AD7606_H
+
+#define AD7606_TRIGGER_EVENT_BUSY 0
+#define AD7606_TRIGGER_EVENT_FRSTDATA 1
+
+#endif /* _DT_BINDINGS_ADI_AD7606_H */

--
2.49.0