linux-kernel - Re: [PATCH 2/8] dt-bindings: interrupt-controller: add LS7A PCH LPC

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Message-ID: <89d49eada6411c99fdf3ca389b1ff01c2694f954.camel@iscas.ac.cn>
Date: Tue, 10 Feb 2026 14:33:04 +0800
From: Icenowy Zheng <zhengxingda@...as.ac.cn>
To: Rob Herring <robh@...nel.org>
Cc: Thomas Gleixner <tglx@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>,  Conor Dooley <conor+dt@...nel.org>, Thomas
 Bogendoerfer <tsbogend@...ha.franken.de>, Huacai Chen
 <chenhuacai@...nel.org>, Jiaxun Yang <jiaxun.yang@...goat.com>, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-mips@...r.kernel.org
Subject: Re: [PATCH 2/8] dt-bindings: interrupt-controller: add LS7A PCH LPC

在 2026-02-09星期一的 17:48 -0600，Rob Herring写道：
> On Sat, Jan 31, 2026 at 05:45:41PM +0800, Icenowy Zheng wrote:
> > Loongson 7A series PCH contains an LPC controller with an interrupt
> > controller.
> > 
> > Add the device tree binding for the interrupt controller.
> > 
> > Signed-off-by: Icenowy Zheng <zhengxingda@...as.ac.cn>
> > ---
> >  .../loongson,pch-lpc.yaml                     | 52
> > +++++++++++++++++++
> >  1 file changed, 52 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/interrupt-
> > controller/loongson,pch-lpc.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/interrupt-
> > controller/loongson,pch-lpc.yaml
> > b/Documentation/devicetree/bindings/interrupt-
> > controller/loongson,pch-lpc.yaml
> > new file mode 100644
> > index 0000000000000..c00fbf31f47f0
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/interrupt-
> > controller/loongson,pch-lpc.yaml
> > @@ -0,0 +1,52 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id:
> > http://devicetree.org/schemas/interrupt-controller/loongson,pch-lpc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Loongson PCH LPC Controller
> > +
> > +maintainers:
> > +  - Jiaxun Yang <jiaxun.yang@...goat.com>
> > +
> > +description:
> > +  This interrupt controller is found in the Loongson LS7A family
> > of PCH for
> > +  accepting interrupts sent by LPC-connected peripherals and
> > signalling PIC
> > +  via a single interrupt line when interrupts are available.
> > +
> > +properties:
> > +  compatible:
> > +    const: loongson,pch-lpc-1.0
> 
> Where does 1.0 come from? We don't do version numbers generally
> unless 
> you define where the versions come from (e.g. Soft IP releases for 
> FPGAs). I would have expected "ls7a" in the compatible instead.

Well this replicates what's set on PCH PIC, although I am okay to
change it to `7a1000-pch-lpc` .
Thanks
Icenowy

> 
> Rob
>