linux-kernel - [PATCH v6 1/8] dt-bindings: iio: dac: ad3552r: add iio backend support

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Message-Id: <20241014-wip-bl-ad3552r-axi-v0-iio-testing-v6-1-eeef0c1e0e56@baylibre.com>
Date: Mon, 14 Oct 2024 12:08:07 +0200
From: Angelo Dureghello <adureghello@...libre.com>
To: Nuno Sá <nuno.sa@...log.com>, 
 Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Olivier Moysan <olivier.moysan@...s.st.com>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, dlechner@...libre.com, 
 Mark Brown <broonie@...nel.org>, 
 Angelo Dureghello <adureghello@...libre.com>, 
 Conor Dooley <conor.dooley@...rochip.com>
Subject: [PATCH v6 1/8] dt-bindings: iio: dac: ad3552r: add iio backend
 support

From: Angelo Dureghello <adureghello@...libre.com>

There is a version of AXI DAC IP block (for FPGAs) that provides
a physical QSPI bus for AD3552R and similar chips, so supporting
spi-controller functionalities.

For this case, the binding is modified to include some additional
properties.

Acked-by: Conor Dooley <conor.dooley@...rochip.com>
Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
 Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
index 41fe00034742..2d2561a52683 100644
--- a/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
@@ -60,6 +60,12 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [0, 1, 2, 3]
 
+  io-backends:
+    description: The iio backend reference.
+      Device can be optionally connected to the "axi-ad3552r IP" fpga-based
+      QSPI + DDR (Double Data Rate) controller to reach high speed transfers.
+    maxItems: 1
+
   '#address-cells':
     const: 1
 
@@ -128,6 +134,7 @@ patternProperties:
           - custom-output-range-config
 
 allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
   - if:
       properties:
         compatible:

-- 
2.45.0.rc1