linux-kernel - Re: [PATCH v5 1/2] pinctrl: mediatek: make MediaTek pinctrl v2 driver ready for buidling loadable module

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Date:   Tue, 7 Apr 2020 14:57:54 +0800
From:   Light Hsieh <light.hsieh@...iatek.com>
To:     Sean Wang <sean.wang@...nel.org>
CC:     Linus Walleij <linus.walleij@...aro.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>, <kuohong.wang@...iatek.com>
Subject: Re: [PATCH v5 1/2] pinctrl: mediatek: make MediaTek pinctrl v2
 driver ready for buidling loadable module

On Tue, 2020-03-31 at 14:15 -0700, Sean Wang wrote:
> Hi Light,
> >  int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
> >                               const struct mtk_pin_desc *desc, bool pullup)
> > @@ -492,6 +502,7 @@ int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
> >
> >         return 0;
> >  }
> > +EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_rev1);
> >
> >  int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
> >                               const struct mtk_pin_desc *desc, bool pullup,
> > @@ -517,6 +528,7 @@ int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
> >
> >         return 0;
> >  }
> > +EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_rev1);
> >
> 
> I got build error with the patch
> 
> ../drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:529:1: error:
> redefinition of '__ksymtab_mtk_pinconf_bias_set_rev1'
> ../drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:503:1: note:
> previous definition of '__ksymtab_mtk_pinconf_bias_set_rev1' was here
> make[4]: *** [drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.o] Error 1
> 

I will correct it on v6.

> >  /* Combo for the following pull register type:
> >   * 1. PU + PD
> > @@ -717,6 +729,7 @@ int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
> >  out:
> >         return err;
> >  }
> > +EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set_combo);
> >
> <snip>
> > diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
> > index 83bf29c..8823c0c 100644
> > --- a/drivers/pinctrl/mediatek/pinctrl-paris.c
> > +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
> > @@ -10,6 +10,7 @@
> >   */
> >
> >  #include <linux/gpio/driver.h>
> > +#include <linux/module.h>
> >  #include <dt-bindings/pinctrl/mt65xx.h>
> >  #include "pinctrl-paris.h"
> >
> > @@ -633,6 +634,7 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
> >
> >         return len;
> >  }
> > +EXPORT_SYMBOL_GPL(mtk_pctrl_show_one_pin);
> >
> >  #define PIN_DBG_BUF_SZ 96
> >  static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
> > @@ -1037,3 +1039,7 @@ static int mtk_paris_pinctrl_resume(struct device *device)
> >         .suspend_noirq = mtk_paris_pinctrl_suspend,
> >         .resume_noirq = mtk_paris_pinctrl_resume,
> >  };
> > +EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe);
> 
> place EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe) exactly at the tail
> of mtk_paris_pinctrl_probe definition.
> 

I will move it.

> > +
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris");
> > --
> > 1.8.1.1.dirty