return 0;
 }
 
-int at91_gpio_request_enable(struct pinctrl_dev *pctldev,
-                           struct pinctrl_gpio_range *range,
-                           unsigned offset)
+static int at91_gpio_request_enable(struct pinctrl_dev *pctldev,
+                                   struct pinctrl_gpio_range *range,
+                                   unsigned offset)
 {
        struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
        struct at91_gpio_chip *at91_chip;
        return 0;
 }
 
-void at91_gpio_disable_free(struct pinctrl_dev *pctldev,
-                          struct pinctrl_gpio_range *range,
-                          unsigned offset)
+static void at91_gpio_disable_free(struct pinctrl_dev *pctldev,
+                                  struct pinctrl_gpio_range *range,
+                                  unsigned offset)
 {
        struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
 
        return ret;
 }
 
-int __devexit at91_pinctrl_remove(struct platform_device *pdev)
+static int __devexit at91_pinctrl_remove(struct platform_device *pdev)
 {
        struct at91_pinctrl *info = platform_get_drvdata(pdev);
 
        return 0;
 }
 
-int at91_gpio_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr,
-                       const u32 *intspec, unsigned int intsize,
-                       irq_hw_number_t *out_hwirq, unsigned int *out_type)
+static int at91_gpio_irq_domain_xlate(struct irq_domain *d,
+                                     struct device_node *ctrlr,
+                                     const u32 *intspec, unsigned int intsize,
+                                     irq_hw_number_t *out_hwirq,
+                                     unsigned int *out_type)
 {
        struct at91_gpio_chip *at91_gpio = d->host_data;
        int ret;