linux-kernel - Re: [PATCH v3 1/6] dt-bindings: pinctrl: qcom: rename spi0 pins on IPQ5424

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Message-ID: <2ed8afe0-4cf7-4d97-8de8-3c3119db3342@quicinc.com>
Date: Mon, 30 Dec 2024 16:17:50 +0530
From: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, <andersson@...nel.org>,
        <linus.walleij@...aro.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <konradybcio@...nel.org>,
        <mturquette@...libre.com>, <sboyd@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-clk@...r.kernel.org>
CC: <quic_varada@...cinc.com>, <quic_srichara@...cinc.com>
Subject: Re: [PATCH v3 1/6] dt-bindings: pinctrl: qcom: rename spi0 pins on
 IPQ5424



On 12/30/2024 1:46 PM, Krzysztof Kozlowski wrote:
> On 30/12/2024 08:50, Manikanta Mylavarapu wrote:
>>
>>
>> On 12/27/2024 3:00 PM, Krzysztof Kozlowski wrote:
>>> On 27/12/2024 10:18, Manikanta Mylavarapu wrote:
>>>>
>>>>
>>>> On 12/27/2024 1:06 PM, Krzysztof Kozlowski wrote:
>>>>> On 27/12/2024 08:24, Manikanta Mylavarapu wrote:
>>>>>> SPI protocol runs on serial engine 4. Hence rename
>>>>>> spi0 pins to spi4 like spi0_cs to spi4_cs etc.
>>>>>>
>>>>>> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
>>>>>> ---
>>>>>
>>>>>
>>>>> <form letter>
>>>>> This is a friendly reminder during the review process.
>>>>>
>>>>> It looks like you received a tag and forgot to add it.
>>>>>
>>>>> If you do not know the process, here is a short explanation:
>>>>> Please add Acked-by/Reviewed-by/Tested-by tags when posting new versions
>>>>> of patchset, under or above your Signed-off-by tag, unless patch changed
>>>>> significantly (e.g. new properties added to the DT bindings). Tag is
>>>>> "received", when provided in a message replied to you on the mailing
>>>>> list. Tools like b4 can help here. However, there's no need to repost
>>>>> patches *only* to add the tags. The upstream maintainer will do that for
>>>>> tags received on the version they apply.
>>>>>
>>>>> Please read:
>>>>> https://elixir.bootlin.com/linux/v6.12-rc3/source/Documentation/process/submitting-patches.rst#L577
>>>>>
>>>>> If a tag was not added on purpose, please state why and what changed.
>>>>> </form letter>
>>>>>
>>>>
>>>> Hi Krzysztof,
>>>>
>>>> 	Patches #1 to #4 are newly added in V3 (to rename SPI0 to SPI4). Hence, there are no A-b/R-b
>>>> 	tags associated with these patches. I mentioned this information in the cover letter.
>>>> 	
>>>> 	I assume you are referring to Patch #1 from the V2 series.
>>>> 	Patch #1 [1] and #2 [2] from the V2 series have been merged into linux-next.
>>>> 	[1] https://lore.kernel.org/linux-arm-msm/20241217091308.3253897-2-quic_mmanikan@quicinc.com/
>>>> 	[2] https://lore.kernel.org/linux-arm-msm/20241217091308.3253897-3-quic_mmanikan@quicinc.com/
>>>>
>>>> 	Please let me know if i missed anything.
>>>
>>> v3 mislead me here and three different subsystems in one patchset.
>>>
>>> Anyway, if this is different patch then review follows - there is no ABI
>>> impact explanation and this is an ABI break. What's more, entries are
>>> not sorted anymore and why there is a gap? spi4, spi1 and spi10? Where
>>> is spi3?
>>>
>>> Not sure if this renaming is useful or correct, especially considering
>>> not many arguments in commit msg (e.g. datasheet?).
>>>
>>>
>>
>> Hi Krzysztof,
>>
>> 	The IPQ5424 supports two SPI instances on serial engine 4 and 5.
>> 	Previously, SPI clocks, gpio pins and DTS node names were named
>> 	according to protocol instances like spi0 and spi1.
>>
>> 	As per the feedback received in
>> 	https://lore.kernel.org/linux-arm-msm/ca0ecc07-fd45-4116-9927-8eb3e737505f@oss.qualcomm.com/,
>> 	spi0 has been renamed to spi4 to align with the serial engine instance.
>>
>> 	Kindly advice if it's not acceptable.
> 
> The advice was not about pins, though. My comments stands for commit
> msg. Nothing about ABI, nothing about datasheet...
> 

I will update the commit message in the next version.

Thanks & Regards,
Manikanta.