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From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Fri, 5 Jun 2020 11:01:26 +0300
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Subject: Re: [PATCH v4 02/11] mfd: Add support for Kontron sl28cpld management controller
To:     Michael Walle <michael@walle.cc>
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On Fri, Jun 5, 2020 at 12:16 AM Michael Walle <michael@walle.cc> wrote:
>
> Add the core support for the board management controller found on the
> SMARC-sAL28 board. It consists of the following functions:
>  - watchdog
>  - GPIO controller
>  - PWM controller
>  - fan sensor
>  - interrupt controller
>
> At the moment, this controller is used on the Kontron SMARC-sAL28 board.
>
> Please note that the MFD driver is defined as bool in the Kconfig
> because the next patch will add interrupt support.

...

> +config MFD_SL28CPLD
> +       bool "Kontron sl28 core driver"
> +       depends on I2C=y

Why not module?

> +       depends on OF

I didn't find an evidence this is needed.

No Compile Test?

> +       select REGMAP_I2C
> +       select MFD_CORE

...

> +#include <linux/of_platform.h>

No evidence of user of this.
I think you meant mod_devicetable.h.

...

> +static struct i2c_driver sl28cpld_driver = {
> +       .probe_new = sl28cpld_probe,
> +       .driver = {
> +               .name = "sl28cpld",
> +               .of_match_table = of_match_ptr(sl28cpld_of_match),

Drop of_match_ptr(). It has a little sense in this context (depends OF).
It will have a little sense even if you drop depends OF b/c you will
introduce a compiler warning.

> +       },
> +};


-- 
With Best Regards,
Andy Shevchenko