linux-kernel - Re: [PATCH v3 6/7] ASoC: dt-bindings: xmos,xvf3500: add XMOS XVF3500 voice processor

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Date: Tue, 6 Feb 2024 16:35:54 +0100
From: Javier Carrasco <javier.carrasco@...fvision.net>
To: Matthias Kaehlcke <mka@...omium.org>
Cc: Mark Brown <broonie@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 6/7] ASoC: dt-bindings: xmos,xvf3500: add XMOS XVF3500
 voice processor

On 06.02.24 16:22, Matthias Kaehlcke wrote:
> On Tue, Feb 06, 2024 at 04:05:15PM +0100, Javier Carrasco wrote:
>> On 06.02.24 15:32, Mark Brown wrote:
>>> On Tue, Feb 06, 2024 at 02:59:34PM +0100, Javier Carrasco wrote:
>>>
>>>> The XMOS XVF3500 VocalFusion Voice Processor[1] is a low-latency, 32-bit
>>>> multicore controller for voice processing.
>>>
>>> Acked-by: Mark Brown <broonie@...nel.org>
>>>
>>> though...
>>>
>>>> +  vdd-supply:
>>>> +    description:
>>>> +      Regulator for the 1V0 supply.
>>>> +
>>>> +  vdd2-supply:
>>>> +    description:
>>>> +      Regulator for the 3V3 supply.
>>>
>>> ...it's a bit weird that the supplies are named like this, usually
>>> there'd be some sort of meaningful name (even if it's just VDD_1V0 and
>>> VDD_3V3 or something).  Are you sure these are the actual names?
>>
>> The names in the datasheet are vdd for the 1V0 supply and vddio for the
>> 3V3 supply. I named the latter vdd2 instead because this device does not
>> have its own driver and instead it uses the onboard_usb_hub generic
>> driver, where the supplies are named vdd and vdd2.
>>
>> Those are the names used for devm_regulator_bulk_get(). Is that not the
>> right way to match them?
> 
> If desired the driver could be extended to support device specific regulator
> names through struct onboard_hub/dev_pdata.

the onboard_usb_hub driver as well and their supplies are named vdd and
vdd2:
Documentation/devicetree/bindings/usb/cypress,hx3.yaml

I took a look at its datasheet and there is no vdd2 as such, so I think
we are in a similar situation here. Actually that device requires five
supplies and they have been grouped into vdd and vdd2 according to their
voltage level.

Best regards,
Javier Carrasco