[PATCH v5 1/2] dt-bindings: npu: Add Arm Ethos-U65/U85

Rob Herring (Arm)
2025-10-16T21:10:11Z

Add a binding schema for Arm Ethos-U65/U85 NPU. The Arm Ethos-U NPUs are
designed for edge AI inference applications.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
.../devicetree/bindings/npu/arm,ethos.yaml | 79 ++++++++++++++++++++++
1 file changed, 79 insertions(+)

diff --git a/Documentation/devicetree/bindings/npu/arm,ethos.yaml b/Documentation/devicetree/bindings/npu/arm,ethos.yaml
new file mode 100644
index 000000000000..716c4997f976
--- /dev/null
+++ b/Documentation/devicetree/bindings/npu/arm,ethos.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/npu/arm,ethos.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Arm Ethos U65/U85
+
+maintainers:
+ - Rob Herring <robh@kernel.org>
+
+description: >
+ The Arm Ethos-U NPUs are designed for IoT inference applications. The NPUs
+ can accelerate 8-bit and 16-bit integer quantized networks:
+
+ Transformer networks (U85 only)
+ Convolutional Neural Networks (CNN)
+ Recurrent Neural Networks (RNN)
+
+ Further documentation is available here:
+
+ U65 TRM: https://developer.arm.com/documentation/102023/
+ U85 TRM: https://developer.arm.com/documentation/102685/
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - fsl,imx93-npu
+ - const: arm,ethos-u65
+ - items:
+ - {}
+ - const: arm,ethos-u85
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 2
+
+ clock-names:
+ items:
+ - const: core
+ - const: apb
+
+ power-domains:
+ maxItems: 1
+
+ sram:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/imx93-clock.h>
+
+ npu@4a900000 {
+ compatible = "fsl,imx93-npu", "arm,ethos-u65";
+ reg = <0x4a900000 0x1000>;
+ interrupts = <GIC_SPI 178 IRQ_TYPE_LEVEL_HIGH>;
+ power-domains = <&mlmix>;
+ clocks = <&clk IMX93_CLK_ML>, <&clk IMX93_CLK_ML_APB>;
+ clock-names = "core", "apb";
+ sram = <&sram>;
+ };
+...

--
2.51.0