linux-kernel - Re: [PATCH v1 1/5] ASoC: dt-bindings: Add StarFive JH7110 dummy PWM-DAC transmitter

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Message-ID: <d046796e-34a0-56e5-a740-6a1fcf41d216@starfivetech.com>
Date:   Mon, 10 Jul 2023 11:22:50 +0800
From:   Hal Feng <hal.feng@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor@...nel.org>,
        "Walker Chen" <walker.chen@...rfivetech.com>,
        Xingyu Wu <xingyu.wu@...rfivetech.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>
CC:     <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/5] ASoC: dt-bindings: Add StarFive JH7110 dummy
 PWM-DAC transmitter

On Sat, 1 Jul 2023 10:17:51 +0200, Krzysztof Kozlowski wrote:
> On 30/06/2023 03:57, Hal Feng wrote:
>> On Mon, 26 Jun 2023 17:34:56 +0200, Krzysztof Kozlowski wrote:
>>> On 26/06/2023 13:09, Hal Feng wrote:
>>>> Add bindings for StarFive JH7110 dummy PWM-DAC transmitter.
>>>
>>> ...
>>>
>>>> +required:
>>>> +  - compatible
>>>> +  - "#sound-dai-cells"
>>>> +
>>>> +additionalProperties: false
>>>> +
>>>> +examples:
>>>> +  - |
>>>> +    pwmdac-dit {
>>>> +        compatible = "starfive,jh7110-pwmdac-dit";
>>>> +        #sound-dai-cells = <0>;
>>>
>>> BTW, I don't see any resources here. Neither in the driver. I think you
>>> just added this for driver, not for a real hardware.
>> 
>> Yes, this is a dummy PWM-DAC transmitter as described in the title. The
>> StarFive JH7110 PWM-DAC module doesn't need a hardware codec, but a
>> dummy codec is needed for the driver.
> 
> Bindings are no for drivers, therefore with such reasoning the answer
> is: drop entire binding. If you think otherwise, please give me some
> more details about the hardware.

I agreed. I will drop this binding and the compatible in patch 2. Thanks.

Best regards,
Hal