1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 8c8621097fa..6b10bdc105d 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -135,6 +135,7 @@ struct gpio_chip {
 
 extern const char *gpiochip_is_requested(struct gpio_chip *chip,
                         unsigned offset);
+extern struct gpio_chip *gpio_to_chip(unsigned gpio);
 extern int __must_check gpiochip_reserve(int start, int ngpio);
 
 /* add/remove chips */