Index: lib/libgpio/gpio.3
===================================================================
--- lib/libgpio/gpio.3
+++ lib/libgpio/gpio.3
@@ -41,6 +41,8 @@
 .Fn gpio_open "unsigned int unit"
 .Ft "gpio_handle_t"
 .Fn gpio_open_device "const char *device"
+.Ft "gpio_handle_t"
+.Fn gpio_fdopen "int fd"
 .Ft void
 .Fn gpio_close "gpio_handle_t handle"
 .Ft int
@@ -88,9 +90,10 @@
 The library operates with a
 .Ft gpio_handle_t
 opaque type which can be created with
-.Fn gpio_open
+.Fn gpio_open ,
+.Fn gpio_open_device ,
 or
-.Fn gpio_open_device .
+.Fn gpio_fdopen .
 When no more GPIO operations are needed, this handle can be destroyed
 with
 .Fn gpio_close .
Index: lib/libgpio/gpio.c
===================================================================
--- lib/libgpio/gpio.c
+++ lib/libgpio/gpio.c
@@ -50,10 +50,15 @@
 gpio_handle_t
 gpio_open_device(const char *device)
 {
-	int fd, maxpins;
+	return (gpio_fdopen(open(device, O_RDONLY)));
+}
+
+gpio_handle_t
+gpio_fdopen(int fd)
+{
+	int maxpins;
 	int serr;
 
-	fd = open(device, O_RDONLY);
 	if (fd < 0)
 		return (GPIO_INVALID_HANDLE);
 	/*
Index: lib/libgpio/libgpio.h
===================================================================
--- lib/libgpio/libgpio.h
+++ lib/libgpio/libgpio.h
@@ -58,6 +58,7 @@
  */
 gpio_handle_t	gpio_open(unsigned int);
 gpio_handle_t	gpio_open_device(const char *);
+gpio_handle_t	gpio_fdopen(int);
 void		gpio_close(gpio_handle_t);
 /*
  * Get a list of all the GPIO pins.