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Sender: Guenter Roeck <groeck7@gmail.com>
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Date: Wed, 10 Jan 2024 13:41:45 -0800
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Subject: Re: [PATCH v1 7/8] tpm: tis-i2c: Add more compatible strings
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To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
 Ninad Palsule <ninad@linux.ibm.com>, Conor Dooley <conor@kernel.org>
Cc: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
 conor+dt@kernel.org, joel@jms.id.au, andrew@codeconstruct.com.au,
 peterhuewe@gmx.de, jarkko@kernel.org, jgg@ziepe.ca, keescook@chromium.org,
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References: <20231212164004.1683589-1-ninad@linux.ibm.com>
 <20231212164004.1683589-8-ninad@linux.ibm.com>
 <20231212-avid-grill-dbead068fac8@spud>
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 <60c8bbdb-4e08-44f0-88d4-ab164d4843b5@linux.ibm.com>
 <20240109-pep-coerce-2a86ae88753d@spud>
 <01974929-dfbf-4989-ba39-369e521827d0@linux.ibm.com>
 <3d194e84-bf1a-48e4-a376-e5c327c6508d@linaro.org>
 <2dd37d2b-28da-4e73-9047-61ec5d64bdb5@linux.ibm.com>
 <edbefdfd-eb59-4d86-ad07-feb066a21082@linaro.org>
 <385b06e9-1daa-408a-a0ed-7b09d7d539df@linux.ibm.com>
 <d56b1e3e-72c4-427f-937d-8c8146bf5b28@linaro.org>
 <3830c26d-96be-4084-a04d-8edb9ccbab5e@roeck-us.net>
 <32d46b64-d4a5-437a-8737-c2d172608559@linaro.org>
From: Guenter Roeck <linux@roeck-us.net>
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In-Reply-To: <32d46b64-d4a5-437a-8737-c2d172608559@linaro.org>
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On 1/10/24 12:34, Krzysztof Kozlowski wrote:
> On 10/01/2024 20:06, Guenter Roeck wrote:
>> On 1/10/24 09:54, Krzysztof Kozlowski wrote:
>>> On 10/01/2024 16:54, Ninad Palsule wrote:
>>>> Hello Krzysztof,
>>>>
>>>>
>>>> On 1/10/24 09:37, Krzysztof Kozlowski wrote:
>>>>> On 10/01/2024 15:31, Ninad Palsule wrote:
>>>>>> Hello Krzysztof,
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>>> I have send it as a separate commit. https://lore.kernel.org/linux-kernel/20231214144954.3833998-1-ninad@linux.ibm.com/
>>>>>>>>> Why did you do that? It now just adds undocumented compatibles to the
>>>>>>>>> driver. Please, as Rob requested, work with Lukas on his series to make
>>>>>>>>> sure that these devices are documented.
>>>>>>>> I think krzysztof kozlowski suggested to send these patches separately:
>>>>>>>> https://lore.kernel.org/linux-kernel/1c5ace65-2fd8-4503-b22f-e0f564d1c83f@linaro.org/
>>>>>>>>
>>>>>>>> Did I misunderstood it? Do you guys want me to include that commit again?
>>>>>>> My comment was in DTS thread under specific DTS patch. How did you
>>>>>>> figure out it applies to driver and bindings? This does not make sense.
>>>>>> Sorry for the misunderstanding. Where do you want me to add driver
>>>>>> patch? Before all DTS patches or after all DTS patches?
>>>>> Does not matter, why do you insist on combining them with DTS? Drivers
>>>>> and bindings are going together. DTS better separate, although depending
>>>>> on the case can be together.
>>>>>
>>>> I have combined DTS and Driver because DTS was using compatibility
>>>> string which is not upstream yet hence I thought it is logical to send
>>>> it under same patchset.
>>>
>>> Sometimes yes, sometimes not. DTS must not go via driver subsystem, so
>>> sending it in the same patchset has implications on maintainers applying
>>> it. Some like it, some don't and you will be nagged for combining them.
>>>
>>
>> "DTS must not go via driver subsystem"
>>
>> I always thought the guideline was to submit separate _patches_ for dts
>> and driver changes, but as part of a single series. I didn't know that
>> there is a rule to submit separate patch _series_. I also didn't know
>> (and as far as I know no one called me on it) that I am not supposed
>> to _apply_ dts changes. So far, I typically applied dts changes together
>> with driver patches after receiving an Acked-by: or Reviewed-by:
>> from a devicetree maintainer.
> 
> I did not notice you applying them, but such guideline - DTS must go via
> respective SoC tree - was always repeated by me and SoC maintainers.
> Just like gazillion other things probably was not documented... or even
> if it was documented, it would be so deep among hundreds of other rules
> nobody would find it. :)
> 
>>
>> This exchange suggests that I did it all wrong. Should I reject devicetree
>> patches submitted as part of a driver patch series going forward ?
> 
> I propose: just ignore them. The SoC maintainer will pick them up.
> 
>> Should I not apply dts patches submitted as part of a patch series ?
> 
> No, please do not apply them.
> 
>> If so, it would help to have some documentation I can point to to explain
>> the rationale to submitters (and myself). Also, in that case, how is the
> 
> Yes, it would. I can try to create something.
> 
>> synchronization between device tree patches and driver patches supposed
>> to happen ?
> 
> There should not be synchronization. Just to remind: we talk about DTS
> (so also DTSI and DTSO), thus everything being in arch/*/boot/dts/. We
> do not talk about DT bindings, right? The bindings are obvious (and
> documented): preferably go via driver subsystem, with fallback/special
> cases via SoC tree and fallback to Rob.
> 

Sorry, misunderstanding on my side. I do not and never did apply patches
in arch/*/boot/dts/. I referred to patches in Documentation/devicetree/

Sorry, I though you also referred to bindings. My bad.

Guenter