[PATCH v2 5/6] dt-bindings: iio: adc: adi,ad7380: add spi-buses property
From: David Lechner
Date: Fri Nov 07 2025 - 15:53:49 EST
Add spi-buses property to describe how many SDO lines are wired up on
the ADC. These chips are simultaneous sampling ADCs and have one SDO
line per channel, either 2 or 4 total depending on the part number.
Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
.../devicetree/bindings/iio/adc/adi,ad7380.yaml | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
index b91bfb16ed6bc6c605880f81050250d1ed9c307a..9ef46cdb047d45d088e0fbc345f58c5b09083385 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
@@ -62,6 +62,10 @@ properties:
spi-cpol: true
spi-cpha: true
+ spi-data-buses:
+ minItems: 1
+ maxItems: 4
+
vcc-supply:
description: A 3V to 3.6V supply that powers the chip.
@@ -245,6 +249,22 @@ allOf:
patternProperties:
"^channel@[0-3]$": false
+ # 2-channel chip can only have up to 2 buses
+ - if:
+ properties:
+ compatible:
+ enum:
+ - adi,ad7380
+ - adi,ad7381
+ - adi,ad7386
+ - adi,ad7387
+ - adi,ad7388
+ - adi,ad7389
+ then:
+ properties:
+ spi-data-buses:
+ maxItems: 2
+
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
@@ -260,6 +280,7 @@ examples:
spi-cpol;
spi-cpha;
spi-max-frequency = <80000000>;
+ spi-data-buses = <0>, <1>;
interrupts = <27 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpio0>;
@@ -284,6 +305,7 @@ examples:
spi-cpol;
spi-cpha;
spi-max-frequency = <80000000>;
+ spi-data-buses = <0>, <1>, <2>, <3>;
interrupts = <27 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpio0>;
--
2.43.0