netdev - Re: [PATCH net-next v3 11/16] dt-bindings: arm: airoha: Add the NPU node for EN7581 SoC

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Message-ID: <20250212-polite-finicky-vulture-b5adc3@krzk-bin>
Date: Wed, 12 Feb 2025 07:49:44 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Lorenzo Bianconi <lorenzo@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Felix Fietkau <nbd@....name>, 
	Sean Wang <sean.wang@...iatek.com>, Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Philipp Zabel <p.zabel@...gutronix.de>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, "Chester A. Unal" <chester.a.unal@...nc9.com>, 
	Daniel Golle <daniel@...rotopia.org>, DENG Qingfang <dqfext@...il.com>, Andrew Lunn <andrew@...n.ch>, 
	Vladimir Oltean <olteanv@...il.com>, netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org, upstream@...oha.com
Subject: Re: [PATCH net-next v3 11/16] dt-bindings: arm: airoha: Add the NPU
 node for EN7581 SoC

On Tue, Feb 11, 2025 at 05:32:51PM +0100, Lorenzo Bianconi wrote:
> On Feb 11, Krzysztof Kozlowski wrote:
> > On Sun, Feb 09, 2025 at 01:09:04PM +0100, Lorenzo Bianconi wrote:
> > > This patch adds the NPU document binding for EN7581 SoC.
> > > The Airoha Network Processor Unit (NPU) provides a configuration interface
> > > to implement wired and wireless hardware flow offloading programming Packet
> > > Processor Engine (PPE) flow table.
> > > 
> > > Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
> > > ---
> > >  .../devicetree/bindings/arm/airoha,en7581-npu.yaml | 71 ++++++++++++++++++++++
> > >  1 file changed, 71 insertions(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/arm/airoha,en7581-npu.yaml b/Documentation/devicetree/bindings/arm/airoha,en7581-npu.yaml
> > > new file mode 100644
> > > index 0000000000000000000000000000000000000000..a5bcfa299e7cd54f51e70f7ded113f1efcd3e8b7
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/arm/airoha,en7581-npu.yaml
> > 
> > arm is for top-level nodes, this has to go to proper directory or as
> > last-resort to the soc.
> > 
> > > @@ -0,0 +1,71 @@
> > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/arm/airoha,en7581-npu.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Airoha Network Processor Unit for EN7581 SoC
> > > +
> > > +maintainers:
> > > +  - Lorenzo Bianconi <lorenzo@...nel.org>
> > > +
> > > +description:
> > > +  The Airoha Network Processor Unit (NPU) provides a configuration interface
> > > +  to implement wired and wireless hardware flow offloading programming Packet
> > > +  Processor Engine (PPE) flow table.
> > 
> > Sounds like network device, so maybe net?
> 
> yes. Do you mean to move it in Documentation/devicetree/bindings/net/ ?


Yes... and no, because after second look at your driver it looks more
like a mailbox. So basically I don't know. I usually hope contributors
know better. :)

If this is onlt mailbox provider, then should be placed in mailbox. If
this is much more (including mailbox) but main function is network, then
could be in net. So it all depends...

Best regards,
Krzysztof