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Message-ID: <CAGp9LzoJ1MiqQhoRnqEgrTP6FycVGJLSQR41FOYK85ic2cgmLA@mail.gmail.com>
Date:   Tue, 31 Mar 2020 14:15:57 -0700
From:   Sean Wang <sean.wang@...nel.org>
To:     Light Hsieh <light.hsieh@...iatek.com>
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

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

>  /* 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.

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

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