linux-kernel - RE: [PATCH 1/3] gpio: mxc: Support module build

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Message-ID: <DB3PR0402MB39168FEA9306CBF90A596E31F5630@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date:   Sun, 12 Jul 2020 01:34:31 +0000
From:   Anson Huang <anson.huang@....com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     Russell King <linux@...linux.org.uk>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "oleksandr.suvorov@...adex.com" <oleksandr.suvorov@...adex.com>,
        Adam Ford <aford173@...il.com>,
        Andreas Kemnade <andreas@...nade.info>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Leo Li <leoyang.li@....com>, Vinod Koul <vkoul@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Olof Johansson <olof@...om.net>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH 1/3] gpio: mxc: Support module build

Hi, Linus

> Subject: Re: [PATCH 1/3] gpio: mxc: Support module build
> 
> On Wed, Jul 8, 2020 at 1:28 AM Anson Huang <Anson.Huang@....com>
> wrote:
> 
> >  subsys_initcall(gpio_mxc_init);
> > +
> > +MODULE_AUTHOR("Shawn Guo <shawn.guo@...aro.org>");
> > +MODULE_DESCRIPTION("i.MX GPIO Driver"); MODULE_LICENSE("GPL");
> 
> You are making this modualrizable but keeping the subsys_initcall(), which
> doesn't make very much sense. It is obviously not necessary to do this probe
> at subsys_initcall() time, right?
>

If building it as module, the subsys_initcall() will be equal to module_init(), I keep
it unchanged is because I try to make it identical when built-in, since most of the
config will still have it built-in, except the Android GKI support. Does it make sense?
 
> Take this opportunity to convert the driver to use
> module_platform_driver() as well.

If you think it has to be or it is better to use module_platform_driver(), I will do
it in V2.

thanks,
Anson