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Date:   Sat, 29 Feb 2020 10:28:31 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     "Rob Herring" <robh@...nel.org>
Cc:     "linux-mips" <linux-mips@...r.kernel.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        "Jason Cooper" <jason@...edaemon.net>,
        "Marc Zyngier" <maz@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        "Ralf Baechle" <ralf@...ux-mips.org>,
        "Paul Burton" <paulburton@...nel.org>,
        "Huacai Chen" <chenhc@...ote.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Allison Randal" <allison@...utok.net>,
        "linux-kernel" <linux-kernel@...r.kernel.org>,
        "devicetree" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 07/10] dt-bindings: mips: Add loongson boards


 ---- 在 星期四, 2020-02-27 00:52:11 Rob Herring <robh@...nel.org> 撰写 ----
 > On Fri, Feb 21, 2020 at 01:09:22PM +0800, Jiaxun Yang wrote:
 > > Prepare for later dts.
 > > 
 > > Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
 > > ---
 > >  .../bindings/mips/loongson/devices.yaml       | 29 +++++++++++++++++++
 > >  1 file changed, 29 insertions(+)
 > >  create mode 100644 Documentation/devicetree/bindings/mips/loongson/devices.yaml
 > > 
 > > diff --git a/Documentation/devicetree/bindings/mips/loongson/devices.yaml b/Documentation/devicetree/bindings/mips/loongson/devices.yaml
 > > new file mode 100644
 > > index 000000000000..32bec784da87
 > > --- /dev/null
 > > +++ b/Documentation/devicetree/bindings/mips/loongson/devices.yaml
 > > @@ -0,0 +1,29 @@
 > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 > > +%YAML 1.2
 > > +---
 > > +$id: http://devicetree.org/schemas/mips/loongson/devices.yaml#
 > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
 > > +
 > > +title: Loongson based Platforms Device Tree Bindings
 > > +
 > > +maintainers:
 > > +  - Jiaxun Yang <jiaxun.yang@...goat.com>
 > > +description: |
 > > +  Devices with a Loongson CPU shall have the following properties.
 > 
 > Perhaps some details about the platform.
 > 
 > > +  Note that generic device is used for built-in dtbs and will be
 > > +  patched during boot on firmware without OF support.
 > 
 > That's a kernel detail that doesn't belong here. (BTW, built-in dtb 
 > support is intended as a transition step for bootloaders without dtb 
 > knowledge. It's not the recommended way and shouldn't be used on new 
 > platforms).

Yes, it's used to deal with legacy platforms.
Will drop this line in next version.

Thanks.

 > 
 > > +
 > > +properties:
 > > +  $nodename:
 > > +    const: '/'
 > > +  compatible:
 > > +    oneOf:
 > > +
 > > +      - description: Generic Loongson3 4Core + RS780E
 > > +        items:
 > > +          - const: loongson,loongson3-4core-rs780e
 > > +
 > > +      - description: Generic Loongson3 8Core + RS780E
 > > +        items:
 > > +          - const: loongson,loongson3-8core-rs780e
 > > +...
 > > -- 
 > > 2.25.0
 > > 
 > > 
 >

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