Documentation: gpio: Move drivers-on-gpio.txt to driver-api

Move gpio/drivers-on-gpio.txt to driver-api/gpio/drivers-on-gpio.rst and
make sure it builds cleanly as ReST.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/Documentation/gpio/drivers-on-gpio.txt b/Documentation/driver-api/gpio/drivers-on-gpio.rst
similarity index 98%
rename from Documentation/gpio/drivers-on-gpio.txt
rename to Documentation/driver-api/gpio/drivers-on-gpio.rst
index a2ccbab..0194838 100644
--- a/Documentation/gpio/drivers-on-gpio.txt
+++ b/Documentation/driver-api/gpio/drivers-on-gpio.rst
@@ -1,3 +1,4 @@
+============================
 Subsystem drivers using GPIO
 ============================
 
diff --git a/Documentation/driver-api/gpio/index.rst b/Documentation/driver-api/gpio/index.rst
index 2b73ea5..6a374de 100644
--- a/Documentation/driver-api/gpio/index.rst
+++ b/Documentation/driver-api/gpio/index.rst
@@ -11,6 +11,7 @@
    driver
    consumer
    board
+   drivers-on-gpio
    legacy
 
 Core
diff --git a/Documentation/gpio/00-INDEX b/Documentation/gpio/00-INDEX
index 650cb06..17e19a6 100644
--- a/Documentation/gpio/00-INDEX
+++ b/Documentation/gpio/00-INDEX
@@ -1,7 +1,4 @@
 00-INDEX
 	- This file
-drivers-on-gpio.txt:
-	- Drivers in other subsystems that can use GPIO to provide more
-	  complex functionality.
 sysfs.txt
 	- Information about the GPIO sysfs interface
diff --git a/Documentation/gpio/sysfs.txt b/Documentation/gpio/sysfs.txt
index 6cdeab8..58eeab8 100644
--- a/Documentation/gpio/sysfs.txt
+++ b/Documentation/gpio/sysfs.txt
@@ -32,9 +32,8 @@
 GPIO drivers could be all that the system really needs.
 
 DO NOT ABUSE SYSFS TO CONTROL HARDWARE THAT HAS PROPER KERNEL DRIVERS.
-PLEASE READ THE DOCUMENT NAMED "drivers-on-gpio.txt" IN THIS DOCUMENTATION
-DIRECTORY TO AVOID REINVENTING KERNEL WHEELS IN USERSPACE. I MEAN IT.
-REALLY.
+PLEASE READ THE DOCUMENT AT Documentation/driver-api/gpio/drivers-on-gpio.rst
+TO AVOID REINVENTING KERNEL WHEELS IN USERSPACE. I MEAN IT. REALLY.
 
 Paths in Sysfs
 --------------