[PATCH v5 0/2] pinctrl: mediatek: make MediaTek pinctrl v2 driver ready for buidling loadable module

[PATCH v5 0/2] pinctrl: mediatek: make MediaTek pinctrl v2 driver ready for buidling loadable module

[light.hsieh]

From: Light Hsieh <light.hsieh@mediatek.com>

In the future we want to be able to build the MediaTek pinctrl driver,
based on paris, as kernel module. This patch allows pinctrl-paris.c, the
external interrupt controller mtk-eint.c, and pinctrl-mtk-common-v2.c to
be loadable as module.

The following is the rationale for determining whether mtk-eint.c,
pinctrl-mtk-common-v2.c, and pinctrl-paris.c are built as loadable module:

1. drivers/pinctrl/mediatek/Kconfig:
1.1 PINCTRL_MTXXXX: change from bool to tristate. It is specified in
        defconfig file. MTXXXX can only be the user of pinctrl-paris,
        which can MT6765 or MT8183. The patch for changing
        PINCTRL_MT6765 from bool to tristate will be given as the next
        patch of the patch series.
1.2 PINCTRL_MTK_PARIS: change from bool to tristate and select
        PINCTRL_MTK_V2. No need to specify in defconfig file.
      * PINCTRL_MTK_PARIS will be y if any PINCTRL_MTXXXX selecting
        PINCTRL_MTK_PARIS is y.
      * PINCTRL_MTK_PARIS will be n if all PINCTRL_MTXXXX selecting
        PINCTRL_MTK_PARIS is n.
      * PINCTRL_MTK_PARIS will be m if some PINCTRL_MTXXXX selecting
        PINCTRL_MTK_PARIS are m and other PINCTRL_MTXXXX selecting
        PINCTRL_MTK_PARIS are n.
1.3 PINCTRL_MTK_MOORE: select EINT_MTK and PINCTRL_MTK_V2. It is make
        to be ready for building as loadable kernel module because it
        is not used on Android kernel.        
1.4 PINCTRL_MTK_V2: add this tristate config which depends on
        PINCTRL_MTK_PARIS and PINCTRL_MTK_MOORE. No need to specify in 
        defconfig file.
      * PINCTRL_MTK_V2 will be y if either PINCTRL_MTK_PARIS or
        PINCTRL_MTK_MOORE is y.
      * PINCTRL_MTK_V2 will be n if both PINCTRL_MTK_PARIS and
        PINCTRL_MTK_MOORE are n.
      * PINCTRL_MTK_V2 will be m if PINCTRL_MTK_PARIS is m and
        PINCTRL_MTK_MOORE is n.
1.5 EINT_MTK: change from bool to tristate and add rule for default.
        No need to specify in defconfig file.
      * First rule: determine if EINT_MTK is y or n according to 
        selection of PINCTRL_MTK or PINCTRL_MTK_MORE.
      * Second rule: determine if EINT_MTK is y, m, or n according to
        selection of PINCTRL_MTK_PARIS.

2. drivers/pinctrl/mediatek/Makefile: Use PINCTRL_MTK_V2 to determine
        if pinctrl-mtk-common-v2.c is built as loadable module or
        built-in.


Light Hsieh (2):
  pinctrl: mediatek: make MediaTek pinctrl v2 driver ready for buidling
    loadable module
  pinctrl: mediatek: make MediaTek MT6765 pinctrl ready for buiding
    loadable module

 drivers/pinctrl/mediatek/Kconfig                 | 13 ++++++++++---
 drivers/pinctrl/mediatek/Makefile                |  5 +++--
 drivers/pinctrl/mediatek/mtk-eint.c              |  9 +++++++++
 drivers/pinctrl/mediatek/pinctrl-mt6765.c        |  4 ++++
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 24 ++++++++++++++++++++++++
 drivers/pinctrl/mediatek/pinctrl-paris.c         |  6 ++++++
 6 files changed, 56 insertions(+), 5 deletions(-)

-- 
1.8.1.1.dirty

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

[light.hsieh]

From: Light Hsieh <light.hsieh@mediatek.com>

In the future we want to be able to build the MediaTek pinctrl driver,
based on paris, as kernel module. This patch allows pinctrl-paris.c, the
external interrupt controller mtk-eint.c, and pinctrl-mtk-common-v2.c to
be loadable as module.

Signed-off-by: Light Hsieh <light.hsieh@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 drivers/pinctrl/mediatek/Kconfig                 | 11 +++++++++--
 drivers/pinctrl/mediatek/Makefile                |  5 +++--
 drivers/pinctrl/mediatek/mtk-eint.c              |  9 +++++++++
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 24 ++++++++++++++++++++++++
 drivers/pinctrl/mediatek/pinctrl-paris.c         |  6 ++++++
 5 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/mediatek/Kconfig b/drivers/pinctrl/mediatek/Kconfig
index 701f9af..551ac71 100644
--- a/drivers/pinctrl/mediatek/Kconfig
+++ b/drivers/pinctrl/mediatek/Kconfig
@@ -3,10 +3,12 @@ menu "MediaTek pinctrl drivers"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 
 config EINT_MTK
-	bool "MediaTek External Interrupt Support"
+	tristate "MediaTek External Interrupt Support"
 	depends on PINCTRL_MTK || PINCTRL_MTK_MOORE || PINCTRL_MTK_PARIS || COMPILE_TEST
 	select GPIOLIB
 	select IRQ_DOMAIN
+	default y if PINCTRL_MTK || PINCTRL_MTK_MOORE
+	default PINCTRL_MTK_PARIS
 
 config PINCTRL_MTK
 	bool
@@ -17,6 +19,9 @@ config PINCTRL_MTK
 	select EINT_MTK
 	select OF_GPIO
 
+config PINCTRL_MTK_V2
+	tristate
+
 config PINCTRL_MTK_MOORE
 	bool
 	depends on OF
@@ -25,15 +30,17 @@ config PINCTRL_MTK_MOORE
 	select GENERIC_PINMUX_FUNCTIONS
 	select GPIOLIB
 	select OF_GPIO
+	select PINCTRL_MTK_V2
 
 config PINCTRL_MTK_PARIS
-	bool
+	tristate
 	depends on OF
 	select PINMUX
 	select GENERIC_PINCONF
 	select GPIOLIB
 	select EINT_MTK
 	select OF_GPIO
+	select PINCTRL_MTK_V2
 
 # For ARMv7 SoCs
 config PINCTRL_MT2701
diff --git a/drivers/pinctrl/mediatek/Makefile b/drivers/pinctrl/mediatek/Makefile
index a74325a..4b71328 100644
--- a/drivers/pinctrl/mediatek/Makefile
+++ b/drivers/pinctrl/mediatek/Makefile
@@ -2,8 +2,9 @@
 # Core
 obj-$(CONFIG_EINT_MTK)		+= mtk-eint.o
 obj-$(CONFIG_PINCTRL_MTK)	+= pinctrl-mtk-common.o
-obj-$(CONFIG_PINCTRL_MTK_MOORE) += pinctrl-moore.o pinctrl-mtk-common-v2.o
-obj-$(CONFIG_PINCTRL_MTK_PARIS) += pinctrl-paris.o pinctrl-mtk-common-v2.o
+obj-$(CONFIG_PINCTRL_MTK_V2)	+= pinctrl-mtk-common-v2.o
+obj-$(CONFIG_PINCTRL_MTK_MOORE) += pinctrl-moore.o
+obj-$(CONFIG_PINCTRL_MTK_PARIS) += pinctrl-paris.o
 
 # SoC Drivers
 obj-$(CONFIG_PINCTRL_MT2701)	+= pinctrl-mt2701.o
diff --git a/drivers/pinctrl/mediatek/mtk-eint.c b/drivers/pinctrl/mediatek/mtk-eint.c
index 7e526bcf..22736f6 100644
--- a/drivers/pinctrl/mediatek/mtk-eint.c
+++ b/drivers/pinctrl/mediatek/mtk-eint.c
@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
+#include <linux/module.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
 
@@ -379,6 +380,7 @@ int mtk_eint_do_suspend(struct mtk_eint *eint)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_eint_do_suspend);
 
 int mtk_eint_do_resume(struct mtk_eint *eint)
 {
@@ -386,6 +388,7 @@ int mtk_eint_do_resume(struct mtk_eint *eint)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_eint_do_resume);
 
 int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_num,
 			  unsigned int debounce)
@@ -440,6 +443,7 @@ int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_num,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_eint_set_debounce);
 
 int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
 {
@@ -451,6 +455,7 @@ int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
 
 	return irq;
 }
+EXPORT_SYMBOL_GPL(mtk_eint_find_irq);
 
 int mtk_eint_do_init(struct mtk_eint *eint)
 {
@@ -495,3 +500,7 @@ int mtk_eint_do_init(struct mtk_eint *eint)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_eint_do_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek EINT Driver");
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 1da9425..563b662 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -12,6 +12,7 @@
 #include <linux/gpio/driver.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
+#include <linux/module.h>
 #include <linux/of_irq.h>
 
 #include "mtk-eint.h"
@@ -206,6 +207,7 @@ int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_hw_set_value);
 
 int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 		     int field, int *value)
@@ -225,6 +227,7 @@ int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_hw_get_value);
 
 static int mtk_xt_find_eint_num(struct mtk_pinctrl *hw, unsigned long eint_n)
 {
@@ -363,6 +366,7 @@ int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev)
 
 	return mtk_eint_do_init(hw->eint);
 }
+EXPORT_SYMBOL_GPL(mtk_build_eint);
 
 /* Revision 0 */
 int mtk_pinconf_bias_disable_set(struct mtk_pinctrl *hw,
@@ -382,6 +386,7 @@ int mtk_pinconf_bias_disable_set(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_set);
 
 int mtk_pinconf_bias_disable_get(struct mtk_pinctrl *hw,
 				 const struct mtk_pin_desc *desc, int *res)
@@ -404,6 +409,7 @@ int mtk_pinconf_bias_disable_get(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_get);
 
 int mtk_pinconf_bias_set(struct mtk_pinctrl *hw,
 			 const struct mtk_pin_desc *desc, bool pullup)
@@ -423,6 +429,7 @@ int mtk_pinconf_bias_set(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_set);
 
 int mtk_pinconf_bias_get(struct mtk_pinctrl *hw,
 			 const struct mtk_pin_desc *desc, bool pullup, int *res)
@@ -442,6 +449,7 @@ int mtk_pinconf_bias_get(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_get);
 
 /* Revision 1 */
 int mtk_pinconf_bias_disable_set_rev1(struct mtk_pinctrl *hw,
@@ -456,6 +464,7 @@ int mtk_pinconf_bias_disable_set_rev1(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_set_rev1);
 
 int mtk_pinconf_bias_disable_get_rev1(struct mtk_pinctrl *hw,
 				      const struct mtk_pin_desc *desc, int *res)
@@ -473,6 +482,7 @@ int mtk_pinconf_bias_disable_get_rev1(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_disable_get_rev1);
 
 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);
 
 /* 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);
 
 int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
 			      const struct mtk_pin_desc *desc,
@@ -737,6 +750,7 @@ int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
 out:
 	return err;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_bias_get_combo);
 
 /* Revision 0 */
 int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
@@ -766,6 +780,7 @@ int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_drive_set);
 
 int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
 			  const struct mtk_pin_desc *desc, int *val)
@@ -790,6 +805,7 @@ int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_drive_get);
 
 /* Revision 1 */
 int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
@@ -811,6 +827,7 @@ int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_drive_set_rev1);
 
 int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
 			       const struct mtk_pin_desc *desc, int *val)
@@ -828,18 +845,21 @@ int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_drive_get_rev1);
 
 int mtk_pinconf_drive_set_raw(struct mtk_pinctrl *hw,
 			       const struct mtk_pin_desc *desc, u32 arg)
 {
 	return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV, arg);
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_drive_set_raw);
 
 int mtk_pinconf_drive_get_raw(struct mtk_pinctrl *hw,
 			       const struct mtk_pin_desc *desc, int *val)
 {
 	return mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV, val);
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_drive_get_raw);
 
 int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
 			     const struct mtk_pin_desc *desc, bool pullup,
@@ -880,6 +900,7 @@ int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_adv_pull_set);
 
 int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
 			     const struct mtk_pin_desc *desc, bool pullup,
@@ -922,6 +943,7 @@ int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_adv_pull_get);
 
 int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw,
 			      const struct mtk_pin_desc *desc, u32 arg)
@@ -948,6 +970,7 @@ int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw,
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_adv_drive_set);
 
 int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw,
 			      const struct mtk_pin_desc *desc, u32 *val)
@@ -971,3 +994,4 @@ int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mtk_pinconf_adv_drive_get);
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);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris");
-- 
1.8.1.1.dirty

[PATCH v5 2/2] pinctrl: mediatek: make MediaTek MT6765 pinctrl ready for buiding loadable module

[light.hsieh]

From: Light Hsieh <light.hsieh@mediatek.com>

This patch make pinctrl-mt6765 ready for building as loadable module.

Signed-off-by: Light Hsieh <light.hsieh@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 drivers/pinctrl/mediatek/Kconfig          | 2 +-
 drivers/pinctrl/mediatek/pinctrl-mt6765.c | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/mediatek/Kconfig b/drivers/pinctrl/mediatek/Kconfig
index 551ac71..f32d364 100644
--- a/drivers/pinctrl/mediatek/Kconfig
+++ b/drivers/pinctrl/mediatek/Kconfig
@@ -87,7 +87,7 @@ config PINCTRL_MT2712
 	select PINCTRL_MTK
 
 config PINCTRL_MT6765
-	bool "Mediatek MT6765 pin control"
+	tristate "Mediatek MT6765 pin control"
 	depends on OF
 	depends on ARM64 || COMPILE_TEST
 	default ARM64 && ARCH_MEDIATEK
diff --git a/drivers/pinctrl/mediatek/pinctrl-mt6765.c b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
index 905dae8c..2c59d39 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt6765.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
@@ -6,6 +6,7 @@
  *
  */
 
+#include <linux/module.h>
 #include "pinctrl-mtk-mt6765.h"
 #include "pinctrl-paris.h"
 
@@ -1103,3 +1104,6 @@ static int __init mt6765_pinctrl_init(void)
 	return platform_driver_register(&mt6765_pinctrl_driver);
 }
 arch_initcall(mt6765_pinctrl_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek MT6765 Pinctrl Driver");
-- 
1.8.1.1.dirty

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

[Sean Wang]

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

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

[Light Hsieh]

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