[PATCH v3 09/12] dt-bindings: trigger-source: add ADI Util Sigma-Delta SPI

David Lechner
2025-07-01T21:39:40Z

Add new binding for the ADI Util Sigma-Delta SPI FPGA IP Core.

This is used to trigger a SPI offload based on a RDY signal from the
ADC while masking out other signals on the same line.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: David Lechner <dlechner@baylibre.com>
---
.../trigger-source/adi,util-sigma-delta-spi.yaml | 49 ++++++++++++++++++++++
MAINTAINERS | 5 +++
2 files changed, 54 insertions(+)

diff --git a/Documentation/devicetree/bindings/trigger-source/adi,util-sigma-delta-spi.yaml b/Documentation/devicetree/bindings/trigger-source/adi,util-sigma-delta-spi.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..ea466179551cb0d8f8e1cf01f91101b88734da88
--- /dev/null
+++ b/Documentation/devicetree/bindings/trigger-source/adi,util-sigma-delta-spi.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2025 Analog Devices, Inc.
+# Copyright (c) 2025 BayLibre, SAS
+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/trigger-source/adi,util-sigma-delta-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices Util Sigma-Delta SPI IP Core
+
+maintainers:
+ - David Lechner <dlechner@baylibre.com>
+
+description:
+ The Util Sigma-Delta SPI is an FPGA IP core from Analog Devices that provides
+ a SPI offload trigger from the RDY signal of the combined DOUT/RDY pin of
+ the sigma-delta family of ADCs.
+ https://analogdevicesinc.github.io/hdl/library/util_sigma_delta_spi/index.html
+
+properties:
+ compatible:
+ const: adi,util-sigma-delta-spi
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ '#trigger-source-cells':
+ const: 0
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - '#trigger-source-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ trigger@40000 {
+ reg = <0x40000 0x1000>;
+ compatible = "adi,util-sigma-delta-spi";
+ clocks = <&clk 0>;
+ #trigger-source-cells = <0>;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index ea082c6be8acd5081d95bbada99ae47793f206e5..60ba572be7f5b48c0ab1d0d9724e19e335e8761b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25176,6 +25176,11 @@ W: https://github.com/srcres258/linux-doc
T: git git://github.com/srcres258/linux-doc.git doc-zh-tw
F: Documentation/translations/zh_TW/

+TRIGGER SOURCE - ADI UTIL SIGMA DELTA SPI
+M: David Lechner <dlechner@baylibre.com>
+S: Maintained
+F: Documentation/devicetree/bindings/trigger-source/adi,util-sigma-delta-spi.yaml
+
TRIGGER SOURCE - PWM
M: David Lechner <dlechner@baylibre.com>
S: Maintained

--
2.43.0