Add gpio_request() to asm-generic header
This function should also be part of the GPIO API, so add it.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index c19e16c..23c9649 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -94,4 +94,13 @@
*/
int gpio_set_value(unsigned gpio, int value);
+/**
+ * Request a gpio. This should be called before any of the other functions
+ * are used on this gpio.
+ *
+ * @param gp GPIO number
+ * @param label User label for this GPIO
+ * @return 0 if ok, -1 on error
+ */
+int gpio_request(unsigned gpio, const char *label);
#endif /* _ASM_GENERIC_GPIO_H_ */