gpio: constify the data parameter to gpiochip_find()

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index d773540..e633a2a 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1152,8 +1152,9 @@ EXPORT_SYMBOL_GPL(gpiochip_remove);
  * non-zero, this function will return to the caller and not iterate over any
  * more gpio_chips.
  */
-struct gpio_chip *gpiochip_find(void *data,
-                               int (*match)(struct gpio_chip *chip, void *data))
+struct gpio_chip *gpiochip_find(const void *data,
+                               int (*match)(struct gpio_chip *chip,
+                                            const void *data))
 {
        struct gpio_chip *chip = NULL;
        unsigned long flags;

diff --git a/drivers/of/gpio.c b/drivers/of/gpio.c
index e034b38..bba8121 100644 (file)
--- a/drivers/of/gpio.c
+++ b/drivers/of/gpio.c
@@ -229,7 +229,7 @@ void of_gpiochip_remove(struct gpio_chip *chip)
 }
 
 /* Private function for resolving node pointer to gpio_chip */
-static int of_gpiochip_is_match(struct gpio_chip *chip, void *data)
+static int of_gpiochip_is_match(struct gpio_chip *chip, const void *data)
 {
        return chip->of_node == data;
 }

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 1ff4e22..5f52690 100644 (file)
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -142,9 +142,9 @@ extern int __must_check gpiochip_reserve(int start, int ngpio);
 /* add/remove chips */
 extern int gpiochip_add(struct gpio_chip *chip);
 extern int __must_check gpiochip_remove(struct gpio_chip *chip);
-extern struct gpio_chip *gpiochip_find(void *data,
+extern struct gpio_chip *gpiochip_find(const void *data,
                                        int (*match)(struct gpio_chip *chip,
-                                                    void *data));
+                                                    const void *data));
 
 
 /* Always use the library code for GPIO management calls,