Reduce the number of parameters of the function by moving inside
the decoding of the field 'config'.

While there:
- change the type of 'param' to 'unsigned int' to handle the extra
  values not in 'enum pin_config_param';
- change the type of 'arg' to 'u32' to avoid additional conversions
  and align to 'u32' the corresponding param of __stm32_gpio_set().

Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
---
 drivers/pinctrl/stm32/pinctrl-stm32.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index cb7929feb6a0a..b387f6caaf3f0 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -197,7 +197,7 @@ static void stm32_gpio_backup_bias(struct stm32_gpio_bank *bank, u32 offset,
 /* GPIO functions */
 
 static inline void __stm32_gpio_set(struct stm32_gpio_bank *bank,
-	unsigned offset, int value)
+	unsigned int offset, u32 value)
 {
 	stm32_gpio_backup_value(bank, offset, value);
 
@@ -1072,10 +1072,11 @@ static bool stm32_pconf_get(struct stm32_gpio_bank *bank,
 }
 
 static int stm32_pconf_parse_conf(struct pinctrl_dev *pctldev,
-		unsigned int pin, enum pin_config_param param,
-		enum pin_config_param arg)
+		unsigned int pin, unsigned long config)
 {
 	struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	unsigned int param = pinconf_to_config_param(config);
+	u32 arg = pinconf_to_config_argument(config);
 	struct pinctrl_gpio_range *range;
 	struct stm32_gpio_bank *bank;
 	int offset, ret = 0;
@@ -1144,9 +1145,7 @@ static int stm32_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
 
 	for (i = 0; i < num_configs; i++) {
 		mutex_lock(&pctldev->mutex);
-		ret = stm32_pconf_parse_conf(pctldev, g->pin,
-			pinconf_to_config_param(configs[i]),
-			pinconf_to_config_argument(configs[i]));
+		ret = stm32_pconf_parse_conf(pctldev, g->pin, configs[i]);
 		mutex_unlock(&pctldev->mutex);
 		if (ret < 0)
 			return ret;
@@ -1163,9 +1162,7 @@ static int stm32_pconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
 	int i, ret;
 
 	for (i = 0; i < num_configs; i++) {
-		ret = stm32_pconf_parse_conf(pctldev, pin,
-				pinconf_to_config_param(configs[i]),
-				pinconf_to_config_argument(configs[i]));
+		ret = stm32_pconf_parse_conf(pctldev, pin, configs[i]);
 		if (ret < 0)
 			return ret;
 	}
-- 
2.34.1