gpio: Use unsigned int for interrupt numbers

Interrupt numbers are never negative, zero serves as the special invalid
value.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index d11eb2abfced13e11add2baaae2fca2c1549d68b..1d1fa7248d63e52fe1050596e1df615f007f96c5 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1522,7 +1522,7 @@ static bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gpiochip,
  */
 static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
                                          struct irq_chip *irqchip,
-                                         int parent_irq,
+                                         unsigned int parent_irq,
                                          irq_flow_handler_t parent_handler)
 {
        unsigned int offset;
@@ -1571,7 +1571,7 @@ static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
  */
 void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
                                  struct irq_chip *irqchip,
-                                 int parent_irq,
+                                 unsigned int parent_irq,
                                  irq_flow_handler_t parent_handler)
 {
        gpiochip_set_cascaded_irqchip(gpiochip, irqchip, parent_irq,
@@ -1588,7 +1588,7 @@ EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip);
  */
 void gpiochip_set_nested_irqchip(struct gpio_chip *gpiochip,
                                 struct irq_chip *irqchip,
-                                int parent_irq)
+                                unsigned int parent_irq)
 {
        if (!gpiochip->irq_nested) {
                chip_err(gpiochip, "tried to nest a chained gpiochip\n");

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 846f3b9894805c482242c8b0117fe2537842e5bb..393582867afddb17e2969a659bedcb975f710208 100644 (file)
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -168,7 +168,7 @@ struct gpio_chip {
        unsigned int            irq_base;
        irq_flow_handler_t      irq_handler;
        unsigned int            irq_default_type;
-       int                     irq_chained_parent;
+       unsigned int            irq_chained_parent;
        bool                    irq_nested;
        bool                    irq_need_valid_mask;
        unsigned long           *irq_valid_mask;
@@ -244,12 +244,12 @@ int bgpio_init(struct gpio_chip *gc, struct device *dev,
 
 void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
                struct irq_chip *irqchip,
-               int parent_irq,
+               unsigned int parent_irq,
                irq_flow_handler_t parent_handler);
 
 void gpiochip_set_nested_irqchip(struct gpio_chip *gpiochip,
                struct irq_chip *irqchip,
-               int parent_irq);
+               unsigned int parent_irq);
 
 int gpiochip_irqchip_add_key(struct gpio_chip *gpiochip,
                             struct irq_chip *irqchip,