netdev - Re: [PATCH net-next v2 09/10] dt-bindings: net: snps,dwmac: add per channel irq support

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Date: Thu, 10 Aug 2023 23:59:06 +0800
From: Jisheng Zhang <jszhang@...nel.org>
To: Conor Dooley <conor@...nel.org>
Cc: "David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v2 09/10] dt-bindings: net: snps,dwmac: add per
 channel irq support

On Tue, Aug 08, 2023 at 08:39:58AM +0100, Conor Dooley wrote:
> On Tue, Aug 08, 2023 at 12:41:50AM +0800, Jisheng Zhang wrote:
> > The IP supports per channel interrupt, add support for this usage case.
> > 
> > Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> > ---
> >  .../devicetree/bindings/net/snps,dwmac.yaml   | 33 +++++++++++++++++++
> >  1 file changed, 33 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > index 5d81042f5634..5a63302ad200 100644
> > --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > @@ -109,6 +109,7 @@ properties:
> >        - description: The interrupt that occurs when Rx exits the LPI state
> >        - description: The interrupt that occurs when Safety Feature Correctible Errors happen
> >        - description: The interrupt that occurs when Safety Feature Uncorrectible Errors happen
> > +      - description: All of the rx/tx per-channel interrupts
> >  
> >    interrupt-names:
> >      minItems: 1
> > @@ -118,6 +119,38 @@ properties:
> >        - const: eth_lpi
> >        - const: sfty_ce
> >        - const: sfty_ue
> > +      - const: rx0
> > +      - const: rx1
> > +      - const: rx2
> > +      - const: rx3
> > +      - const: rx4
> > +      - const: rx5
> > +      - const: rx6
> > +      - const: rx7
> > +      - const: rx8
> > +      - const: rx9
> > +      - const: rx10
> > +      - const: rx11
> > +      - const: rx12
> > +      - const: rx13
> > +      - const: rx14
> > +      - const: rx15
> > +      - const: tx0
> > +      - const: tx1
> > +      - const: tx2
> > +      - const: tx3
> > +      - const: tx4
> > +      - const: tx5
> > +      - const: tx6
> > +      - const: tx7
> > +      - const: tx8
> > +      - const: tx9
> > +      - const: tx10
> > +      - const: tx11
> > +      - const: tx12
> > +      - const: tx13
> > +      - const: tx14
> > +      - const: tx15
> 
> I don't think Rob's comment about having added 2 interrupts but 32
> interrupt names has been resolved.

I misunderstood Rob's comment. Now I'm not sure whether dt-binding
can support regex or something or not, or let ask for advice in the
following way: how could I write the dt-binding in this case? I didn't
find similar examples so far. I'm not sure listing possible
description and const properties for all channel interrupts is suitable.

> Did you actually test putting this many interrupts into a node?
> AFAICT, any more than 6 will cause complaints.

I tried 12rx and 12tx interrupts in a node, didn't see dtc warning.
so I guess the complaints are from dtb check? I will try to reproduce
them.

> 
> Thanks,
> Conor.