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@gmail.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