linux-kernel - Re: [PATCH v1 1/1] powerpc/8xx: Drop legacy-of-mm-gpiochip.h header

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Message-ID: <124ab5ab-3bfd-4ad7-a75d-981da9c03423@csgroup.eu>
Date: Mon, 18 Nov 2024 12:02:44 +0100
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
 Naveen N Rao <naveen@...nel.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>
Subject: Re: [PATCH v1 1/1] powerpc/8xx: Drop legacy-of-mm-gpiochip.h header



Le 18/11/2024 à 10:20, Andy Shevchenko a écrit :
> On Sat, Nov 16, 2024 at 11:44:35AM +0100, Christophe Leroy wrote:
>> Le 15/11/2024 à 14:38, Andy Shevchenko a écrit :
>>> Remove legacy-of-mm-gpiochip.h header file, replace of_* functions
>>> and structs with appropriate alternatives.
>>
>> Looks like you don't really have an alternative to
>> of_mm_gpiochip_add_data(), you are replacing one single line by 11 new ones,
>> and that is done twice (once for cpm1_gpiochip_add16(), once for
>> cpm1_gpiochip_add32()).
> 
> True, but that's the issue that we have of_specific API. If someone propose
> the common API for the agnostic approach,  it would be nice, but I am not
> the one. And TBH I do not see the advantage of it right now as almost every
> GPIO driver is using its own labeling schema (*). Note, that this patch also
> fixes a memory leak as a side effect.

Can you explain that in the commit message instead of saying you use 
appropriate alternatives that do not exist ?

Don't hesitate to mention the memory leak it in the commit message as well.

> 
> *) the legacy API is mostly used by PPC code, do you want that of_mm_* thingy
> to be moved to PPC specific code instead of killing it? Would be done this
> way as well.

No no, your change is ok for me, just need an accurate commit message.

> 
>>> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>>> ---
>>>    arch/powerpc/platforms/8xx/cpm1.c | 119 +++++++++++++++---------------
>>
>> Does not build:
> 
> Crap, I most likely built something else and not these files...
> I have carefully build-test this for v2.

Just use mpc885_ads_defconfig

> 
> Note to myself: Never ever send the patches on Friday evenings! :-)
> 

Christophe