pinctrl: unify pin type from signed to unsigned

We want singned pins to mean "invalid" only on the outside
of the subsystem.

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/core.c

@@ -88,7 +88,7 @@ struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev,
 	return found ? pctldev : NULL;
 }
 
-struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin)
+struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin)
 {
 	struct pin_desc *pindesc;
 	unsigned long flags;

drivers/pinctrl/core.h

@@ -65,7 +65,7 @@ struct pin_desc {
 
 struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev,
 					     const char *dev_name);
-struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin);
+struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin);
 int pinctrl_get_device_gpio_range(unsigned gpio,
 				  struct pinctrl_dev **outdev,
 				  struct pinctrl_gpio_range **outrange);