linux-kernel - Re: 回复: [PATCH v1 1/2] dt-bindings: ASoC: Add PDM controller for the StarFive JH8100 SoC

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Message-ID: <740b1f29-ab80-488b-b40d-3b8d95bc6c23@linaro.org>
Date: Fri, 8 Mar 2024 08:51:18 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Xingyu Wu <xingyu.wu@...rfivetech.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Takashi Iwai <tiwai@...e.com>, Jaroslav Kysela <perex@...ex.cz>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor.dooley@...rochip.com>
Cc: Walker Chen <walker.chen@...rfivetech.com>,
 "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
 "linux-sound@...r.kernel.org" <linux-sound@...r.kernel.org>
Subject: Re: 回复: [PATCH v1 1/2] dt-bindings: ASoC: Add PDM controller for the StarFive JH8100 SoC

On 08/03/2024 08:49, Xingyu Wu wrote:
>>> +
>>> +  starfive,pdm-modulex:
>>> +    $ref: /schemas/types.yaml#/definitions/uint32
>>> +    enum: [0, 1]
>>> +    description:
>>> +      The module x will be using in PDM controller. Default use module 0.
>>
>> This is an index of the block instance? If so, then it's not allowed.
>> Otherwise I don't understand the description.
>>
> 
> No, this is just one instance. The PDM have two internal and independent modules or called channels.
> They can be configured and used separately, and the user can choose which channel to use.
> 

Do the modulex differ? Why different boards would choose one over another?


Best regards,
Krzysztof