linux-kernel - Re: [PATCH v2] mips: dts: ralink: mt7621: add cell count properties to usb

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Message-ID: <7e9221ae-e53b-475f-9b6f-4cab58b2d109@arinc9.com>
Date: Fri, 8 Mar 2024 16:48:43 +0300
From: Arınç ÜNAL <arinc.unal@...nc9.com>
To: Justin Swartz <justin.swartz@...ingedge.co.za>
Cc: Sergio Paracuellos <sergio.paracuellos@...il.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
 Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 linux-mips@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2] mips: dts: ralink: mt7621: add cell count properties
 to usb

On 8.03.2024 16:21, Justin Swartz wrote:
> 
> On 2024-03-08 14:01, Arınç ÜNAL wrote:
>> On 8.03.2024 01:37, Justin Swartz wrote:
>>> Add default #address-cells and #size-cells properties to the
>>> usb node, which should be suitable for hubs and devices without
>>> explicitly declared interface nodes, as:
>>>
>>>    "#address-cells":
>>>      description: should be 1 for hub nodes with device nodes,
>>>        should be 2 for device nodes with interface nodes.
>>>      enum: [1, 2]
>>>
>>>    "#size-cells":
>>>      const: 0
>>>
>>> -- Documentation/devicetree/bindings/usb/usb-device.yaml
>>>
>>> This version of the patch places the properties according to
>>> the order recommended by:
>>>
>>>     Documentation/devicetree/bindings/dts-coding-style.rst
>>>
>>> Signed-off-by: Justin Swartz <justin.swartz@...ingedge.co.za>
>>> ---
>>>   arch/mips/boot/dts/ralink/mt7621.dtsi | 4 ++--
>>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/mips/boot/dts/ralink/mt7621.dtsi b/arch/mips/boot/dts/ralink/mt7621.dtsi
>>> index 5a89f0b8c..7532e17dd 100644
>>> --- a/arch/mips/boot/dts/ralink/mt7621.dtsi
>>> +++ b/arch/mips/boot/dts/ralink/mt7621.dtsi
>>> @@ -289,10 +289,10 @@ usb: usb@...c0000 {
>>>           reg = <0x1e1c0000 0x1000
>>>                  0x1e1d0700 0x0100>;
>>>           reg-names = "mac", "ippc";
>>> -
>>> +        #address-cells = <1>;
>>> +        #size-cells = <0>;
>>>           clocks = <&sysc MT7621_CLK_XTAL>;
>>>           clock-names = "sys_ck";
>>> -
>>
>> Please keep the empty lines. It's easier to read. I don't see anything on
>> the Devicetree Sources (DTS) Coding Style that would restrict this.
> 
> The reason I removed them was due to the SoC DTSI example shown in [1]
> lacking empty lines between properties, but then using them instead as
> visual separation between properties and child nodes, or at least that's
> how I understood it when I looked at it.
> 
> Personally, I prefer the look of the SoC DTSI example - but I don't mind
> recreating the patch set with the empty lines between the properties left
> entact.
> 
> As there is a mix of property spacing and ordering styles in mt7621.dtsi
> already - what is the consensus on what a node in this file should look
> like?

There's no precise spacing style I maintain here. I simply group together
properties that describe a single attribute, and separate those that
describe different attributes.

> 
> I also don't mind following that pattern and cleaning up the whole dtsi
> according to that if it'll save us all time and energy in future.

If you'd like to improve the ordering style of the MT7621 device tree
sources accordingly with
Documentation/devicetree/bindings/dts-coding-style.rst, I'd be happy to
review those patches.

Arınç