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Message-ID: <d4c65299-d3af-4741-adc8-aafc1ab34369@linaro.org>
Date: Thu, 25 Apr 2024 11:14:42 +0200
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Subject: Re: [PATCH v1] Bluetooth: qca: Correct property enable-gpios handling
 logic for WCN6750 and WCN6855
To: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>,
 Wren Turkal <wt@penguintechs.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
 quic_zijuhu <quic_zijuhu@quicinc.com>, luiz.dentz@gmail.com,
 luiz.von.dentz@intel.com, marcel@holtmann.org,
 linux-bluetooth@vger.kernel.org, kernel@quicinc.com
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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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On 25/04/2024 10:30, Bartosz Golaszewski wrote:
> On Thu, 25 Apr 2024 at 08:30, Wren Turkal <wt@penguintechs.org> wrote:
>>
>> On 4/24/24 11:05 PM, Krzysztof Kozlowski wrote:
>>> On 25/04/2024 00:01, Wren Turkal wrote:
>>>>>>
>>>>>> 3) only care about the case property enable-gpios is not configured,
>>>>>> the original BT driver design logic indeed matches with binging spec's
>>>>>> requirements before bartosz's wrong change
>>>>>
>>>>> What? There is no such case according to bindings. I told you already
>>>>> two times: Either change bindings or this is not valid.
>>>>
>>>> @krzysztof, I'm curious. There is no entry in the binding specifically
>>>> for qca6390. Should there be?
>>>
>>> qca6390 is documented in the bindings, but you are right that it lacks
>>> if:then: entry narrowing/choosing specific supplies and pins. It should
>>> have one, indeed.
>>
>> Would creating an entry for the qca6390 hardware fix the issue you are
>> worried about?
>>
>> Again, sorry for all the, what I assume are, basic questions. I am so
>> far out of my depth here. I am just trying to figure out how to move
>> forward. I really do appreciate your guidance here.
>>
> 
> Wren, Krzysztof: I cannot stop you from doing this but I'm afraid this
> will complicate the power sequencing work unnecessarily. The QCA6390
> PMU bindings I'm proposing[1] are consumers of the BT enable GPIOs. In
> my series I also create an entry for QCA6390 Bluetooth[2] but without
> enable-gpios and with the inputs from the PMU, not host. Please
> consider that if you decide to go with this.

I don't have a near plan to describe QCA6390 supplies and pins, so don't
worry. I also don't think Qualcomm BT understand what are bindings, so I
don't expect patches from them.

Best regards,
Krzysztof