linux-kernel - Re: [PATCH] powerpc: Drop MPC5200 LocalPlus bus FIFO driver

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Message-ID: <20230509082153.jcy2qpvyd44bjaee@pengutronix.de>
Date:   Tue, 9 May 2023 10:21:53 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Anatolij Gustschin <agust@...x.de>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc: Drop MPC5200 LocalPlus bus FIFO driver

Hello,

On Thu, Apr 13, 2023 at 08:16:42AM +0200, Uwe Kleine-König wrote:
> While mpc5200b.dtsi contains a device that this driver can bind to, the
> only purpose of a bound device is to be used by the four exported functions
> mpc52xx_lpbfifo_submit(), mpc52xx_lpbfifo_abort(), mpc52xx_lpbfifo_poll()
> and mpc52xx_lpbfifo_start_xfer(). However there are no callers to this
> function and so the driver is effectively superfluous and can be deleted.
> Also drop some defines and a struct from <asm/mpc52xx.h> that are unused
> now together with the declarations of the four mentioned functions.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> ---
> Hello Michael,
> 
> On Thu, Apr 13, 2023 at 10:11:25AM +1000, Michael Ellerman wrote:
> > Uwe Kleine-König <u.kleine-koenig@...gutronix.de> writes:
> > > On Wed, Dec 28, 2022 at 03:51:29PM +0100, Uwe Kleine-König wrote:
> > >> The four exported functions mpc52xx_lpbfifo_submit(),
> > >> mpc52xx_lpbfifo_abort(), mpc52xx_lpbfifo_poll(), and
> > >> mpc52xx_lpbfifo_start_xfer() are not used. So they can be dropped and the
> > >> definitions needed to call them can be moved into the driver file.
> > >> 
> > >> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> > >
> > > I never got feedback about this driver and it has not appeared in next
> > > up to now. Did it fell through the cracks?
> > 
> > Yeah. I was hoping someone would explain what's going on with the
> > driver.
> > 
> > Presumably there are some out-of-tree drivers that use the routines
> > provided by this driver?
> 
> I googled for the function names but the only related hits were
> references to this thread :-)
> 
> > I think rather than merging this patch, which keeps the code but makes
> > it completely useless, do you mind sending a patch to remove the whole
> > driver? Maybe that will get someone's attention.
> 
> fair enough, here it is.

What is your thought about this patch? If you (also) think getting it
into next soon after a merge window closed, around now would be a good
opportunity to do so ..

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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