linux-kernel - Re: [PATCH 1/4] dt-bindings: net: bluetooth: Add support for Amlogic Bluetooth

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Message-ID: <def67927-3ee7-4e63-a802-9eccf9f60257@amlogic.com>
Date: Thu, 11 Jul 2024 18:58:23 +0800
From: Yang Li <yang.li@...ogic.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
 Marcel Holtmann <marcel@...tmann.org>,
 Luiz Augusto von Dentz <luiz.dentz@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Catalin Marinas
 <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/4] dt-bindings: net: bluetooth: Add support for Amlogic
 Bluetooth


On 2024/7/7 21:08, Krzysztof Kozlowski wrote:
> [你通常不会收到来自 krzk@...nel.org 的电子邮件。请访问 https://aka.ms/LearnAboutSenderIdentification，以了解这一点为什么很重要]
>
> [ EXTERNAL EMAIL ]
>
> On 05/07/2024 13:20, Yang Li via B4 Relay wrote:
>> From: Yang Li <yang.li@...ogic.com>
>>
>> Add binding document for Amlogic Bluetooth chipsets attached over UART.
>>
>> Signed-off-by: Yang Li <yang.li@...ogic.com>
>> ---
>>   .../bindings/net/bluetooth/amlogic,w155s2-bt.yaml  | 62 ++++++++++++++++++++++
>>   1 file changed, 62 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/bluetooth/amlogic,w155s2-bt.yaml b/Documentation/devicetree/bindings/net/bluetooth/amlogic,w155s2-bt.yaml
>> new file mode 100644
>> index 000000000000..d59e3206af62
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/net/bluetooth/amlogic,w155s2-bt.yaml
>> @@ -0,0 +1,62 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +# Copyright (C) 2024 Amlogic, Inc. All rights reserved
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/net/bluetooth/amlogic,w155s2-bt.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Amlogic Bluetooth chips
>> +
>> +description:
>> +  This binding describes UART-attached Amlogic bluetooth chips.
> Do not say that binding describes a binding. It is not helpful. Describe
> the hardware instead.
Well do.
>
>> +
>> +maintainers:
>> +  - Yang Li <yang.li@...ogic.com>
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - const: amlogic,w155s2-bt
>> +      - items:
>> +          - enum:
>> +              - amlogic,w265s1-bt
>> +              - amlogic,w265p1-bt
>> +              - amlogic,w265s2-bt
>> +          - const: amlogic,w155s2-bt
>> +
>> +  amlogic,wcn-pwrseq:
> ??
I will remove this line, add regolator.
>
>> +    default: 0
>> +    description: specify the power sequence used to power on Bluetooth
>> +    $ref: /schemas/types.yaml#/definitions/uint32
> What? I have no clue what is this and have no clue what to say here. Drop.
will do.
>> +
>> +  amlogic,firmware:
>> +    description: specify the path of firmware bin to load
>> +    $ref: /schemas/types.yaml#/definitions/string-array
> Srsly, it's third case in your bindings. Do not re-invent the wheel but
> use existing, common properties. How to find them? Well, git grep or ask
> your colleagues...
I will change "amlogic,firmware" to " firmware-name".
>> +
>> +  amlogic,antenna-number:
>> +    default: 1
>> +    description: number of antenna
> Useless description. Do not repeat the property name but explain what is
> it and how it is used.
>
> Or drop the property.
I will change the description.
>
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +
>> +  amlogic,a2dp-sink-enable:
>> +    default: 0
>> +    description: enable sink mode with controller
> Again, not possible to figure out.
>
> NAK
Well do.
>
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +
>> +required:
>> +  - compatible
>> +  - amlogic,wcn-pwrseq
>> +  - amlogic,firmware
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +    serial {
> Drop
Will do.
>
>> +        bluetooth {
>> +            compatible = "amlogic,w155s2-bt";
>> +            amlogic,wcn-pwrseq = <1>;
> Joking, right?
Well, I will remove it.
>
>
>
> Best regards,
> Krzysztof
>