linux-kernel - Re: [PATCH 2/2] dt-bindings: trivial-devices: Add qca,spidev

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Date: Tue, 6 Feb 2024 17:18:58 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: frut3k7 <frut3k7@...il.com>
Cc: Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Guenter Roeck <linux@...ck-us.net>,
 Naresh Solanki <Naresh.Solanki@...ements.com>,
 Patrick Rudolph <patrick.rudolph@...ements.com>,
 Peter Yin <peteryin.openbmc@...il.com>, Bjorn Helgaas <bhelgaas@...gle.com>,
 Michal Simek <michal.simek@....com>, Lakshmi Yadlapati
 <lakshmiy@...ibm.com>, Lukas Wunner <lukas@...ner.de>,
 Alexander Stein <alexander.stein@...tq-group.com>,
 Fabio Estevam <festevam@...x.de>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: trivial-devices: Add qca,spidev

On 06/02/2024 17:11, frut3k7 wrote:
> On Tue, Feb 6, 2024 at 8:44 AM Krzysztof Kozlowski
> <krzysztof.kozlowski@...aro.org> wrote:
>>
>> On 05/02/2024 20:18, Paweł Owoc wrote:
>>> Add Qualcomm QCA4024 to trivial devices.
>>>
>>> Signed-off-by: Paweł Owoc <frut3k7@...il.com>
>>> ---
>>>  Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
>>> index 79dcd92c4a43..50efbdf2a735 100644
>>> --- a/Documentation/devicetree/bindings/trivial-devices.yaml
>>> +++ b/Documentation/devicetree/bindings/trivial-devices.yaml
>>> @@ -309,6 +309,8 @@ properties:
>>>            - plx,pex8648
>>>              # Pulsedlight LIDAR range-finding sensor
>>>            - pulsedlight,lidar-lite-v2
>>> +            # Qualcomm QCA4024 Multi-mode Bluetooth and 802.15.4 SoC
>>> +          - qca,spidev
>>
>> There is no such hardware as spidev and you even mentioned it is called
>> QCA4024, not spidev. Please don't use that name but a real name.
>>
> The compatibility will be changed to "qca4024" and a new patch version
> will be prepared.

That would be ok except:

> 
>> Also, I have doubts that Bluetooth is a trivial device. Such devices
>> need supplies, have reset/powerdown GPIOs.

this is not resolved. Bluetooth chips are not trivial devices. This one
particular exposes several interfaces to the host, needs a clock and
power supply.

Best regards,
Krzysztof