linux-kernel - Re: [PATCH v3 01/30] mfd: Makefile: Remove build option for MFD:sun4i-gpadc

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Date:   Fri, 31 Aug 2018 10:25:45 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Philipp Rossak <embed3d@...il.com>
Cc:     lee.jones@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        wens@...e.org, linux@...linux.org.uk, jic23@...nel.org,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        eugen.hristev@...rochip.com, rdunlap@...radead.org,
        vilhelm.gray@...il.com, clabbe.montjoie@...il.com,
        quentin.schulz@...tlin.com, geert+renesas@...der.be,
        lukas@...ner.de, icenowy@...c.io, arnd@...db.de,
        broonie@...nel.org, arnaud.pouliquen@...com,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v3 01/30] mfd: Makefile: Remove build option for
 MFD:sun4i-gpadc

Hi Philipp,

First, thanks for doing that rework. It was needed, and it's very much
appreciated :)

As you can imagine though, I have a bunch of comments.

On Thu, Aug 30, 2018 at 05:44:49PM +0200, Philipp Rossak wrote:
> Since we are merging the mfd driver into the sun4i-gpadc driver we need
> to remove the build options for the sun4i-gpadc driver.
> 
> Signed-off-by: Philipp Rossak <embed3d@...il.com>
> ---
>  drivers/mfd/Makefile | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index e9fd20dba18d..c680994db988 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -220,7 +220,6 @@ obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o
>  obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o
>  
>  obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o
> -obj-$(CONFIG_MFD_SUN4I_GPADC)	+= sun4i-gpadc.o

One of the things we should strive for is bisectability, which means
being able to have a working driver at every point in time while
introducing the features.

In this particular case, this isn't really a problem since you're
removing part of code that were never really enabled, but you should
at least document why in your commit log.

Thanks!
Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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