Re: [PATCH v3 1/2] dt-bindings: npu: Add Arm Ethos-U65/U85
From: Frank Li <Frank.li@nxp.com>
Date: 2025-09-29 18:54:05
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On Fri, Sep 26, 2025 at 03:00:48PM -0500, Rob Herring (Arm) wrote:
quoted hunk ↗ jump to hunk
Add a binding schema for Arm Ethos-U65/U85 NPU. The Arm Ethos-U NPUs are designed for edge AI inference applications. 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: + - {}
what's means {} here ?, just not allow arm,ethos-u85 alone?
Reviewed-by: Frank Li <Frank.Li@nxp.com>
+ - 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