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Subject[PATCH 11/13] dt-bindings: iio: offload: add binding for PWM/DMA triggered buffer
Date
This adds a new binding for a PWM trigger and DMA data output connected
to an SPI controller offload instance.

Signed-off-by: David Lechner <dlechner@baylibre.com>
---
.../adi,spi-offload-pwm-trigger-dma-buffer.yaml | 59 ++++++++++++++++++++++
1 file changed, 59 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/offload/adi,spi-offload-pwm-trigger-dma-buffer.yaml b/Documentation/devicetree/bindings/iio/offload/adi,spi-offload-pwm-trigger-dma-buffer.yaml
new file mode 100644
index 000000000000..748cfab19eff
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/offload/adi,spi-offload-pwm-trigger-dma-buffer.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/offload/adi,spi-offload-pwm-trigger-dma-buffer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SPI Offload with PWM Trigger and DMA Buffer Data Output
+
+maintainers:
+ - Michael Hennerich <Michael.Hennerich@analog.com>
+ - Nuno Sá <nuno.sa@analog.com>
+
+description: |
+ This binding describes the connection of a PWM device to the trigger input
+ and a DMA channel to the output data stream of a SPI Offload instance.
+
+ https://wiki.analog.com/resources/fpga/peripherals/spi_engine/offload
+ https://wiki.analog.com/resources/fpga/peripherals/spi_engine/tutorial
+
+$ref: /schemas/spi/adi,axi-spi-engine.yaml#/$defs/offload
+
+properties:
+ compatible:
+ const: adi,spi-offload-pwm-trigger-dma-buffer
+
+ reg:
+ maxItems: 1
+
+ pwms:
+ maxItems: 1
+
+ dmas:
+ maxItems: 1
+
+required:
+ - compatible
+ - pwms
+ - dmas
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ offloads {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ offload@0 {
+ compatible = "adi,spi-offload-pwm-trigger-dma-buffer";
+ reg = <0>;
+ pwms = <&pwm 0>;
+ dmas = <&dma 0>;
+ };
+ };
+ };
--
2.43.0


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