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

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Message-ID: <ZzsG9EjzV82Crl2W@smile.fi.intel.com>
Date: Mon, 18 Nov 2024 11:20:52 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Christophe Leroy <christophe.leroy@...roup.eu>
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

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.

*) 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.

> > 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.

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

-- 
With Best Regards,
Andy Shevchenko