linux-kernel - Re: [PATCH 4/5] lmp92001: mfd: gpio: Add support LMP92001

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Date:   Tue, 12 Sep 2017 11:11:06 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Abhisit Sangjan <s.abhisit@...il.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        Peter Meerwald <pmeerw@...erw.net>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        jacopo <jacopo@...ndi.org>, Lars-Peter Clausen <lars@...afoo.de>
Subject: Re: [PATCH 4/5] lmp92001: mfd: gpio: Add support LMP92001

On Wed, Aug 30, 2017 at 8:21 PM,  <s.abhisit@...il.com> wrote:

> From: Abhisit Sangjan <s.abhisit@...il.com>
>
> TI LMP92001 Analog System Monitor and Controller
>
> 8-bit GPIOs.
> 12 DACs with 12-bit resolution.
>
> The GPIOs and DACs are shared port function with Cy function pin to
> take control the pin suddenly from external hardware.
> DAC's referance voltage selectable for Internal/External.
>
> 16 + 1 ADCs with 12-bit resolution.
>
> Built-in internal Temperature Sensor on channel 17.
> Window Comparator Function is supported on channel 1-3 and 9-11 for
> monitoring with interrupt signal (pending to implement for interrupt).
> ADC's referance voltage selectable for Internal/External.
>
> Signed-off-by: Abhisit Sangjan <s.abhisit@...il.com>

Maybe you can trim the commit message to only be about
GPIO on this patch, since it is only about GPIO?

> +config GPIO_LMP92001
> +       tristate "LMP92001 GPIOs"
> +       depends on MFD_LMP92001

select GPIOLIB

> +static int __init lmp92001_gpio_init(void)
> +{
> +       return platform_driver_register(&lmp92001_gpio_driver);
> +}
> +subsys_initcall(lmp92001_gpio_init);
> +
> +static void __exit lmp92001_gpio_exit(void)
> +{
> +       platform_driver_unregister(&lmp92001_gpio_driver);
> +}
> +module_exit(lmp92001_gpio_exit);

Is this necessary? Can't you just have module_platform_driver() and be
done with it?

Yours,
Linus Walleij