of/gpio: Implement of_gpio_count()

This function is used to count how many GPIOs are specified for
a device node.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h
index e25abf610cb6..fc2472c3c254 100644
--- a/include/linux/of_gpio.h
+++ b/include/linux/of_gpio.h
@@ -65,6 +65,7 @@ static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
 
 extern int of_get_gpio_flags(struct device_node *np, int index,
                              enum of_gpio_flags *flags);
+extern unsigned int of_gpio_count(struct device_node *np);
 
 extern int of_mm_gpiochip_add(struct device_node *np,
                               struct of_mm_gpio_chip *mm_gc);
@@ -81,6 +82,11 @@ static inline int of_get_gpio_flags(struct device_node *np, int index,
         return -ENOSYS;
 }
 
+static inline unsigned int of_gpio_count(struct device_node *np)
+{
+        return 0;
+}
+
 #endif /* CONFIG_OF_GPIO */
 
 /**