gpio: document interaction with other subsystems
Now I am very fed up with people reinventing kernel wheels in
userspace "just because they can" (read, sysfs). Put in a angry
blurb in sysfs doc and put in a new file with pointers to other
subsystem drivers utilizing GPIOs.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/Documentation/gpio/00-INDEX b/Documentation/gpio/00-INDEX
index 1de43ae..179beb2 100644
--- a/Documentation/gpio/00-INDEX
+++ b/Documentation/gpio/00-INDEX
@@ -6,6 +6,9 @@
- How to obtain and use GPIOs in a driver
driver.txt
- How to write a GPIO driver
+drivers-on-gpio.txt:
+ - Drivers in other subsystems that can use GPIO to provide more
+ complex functionality.
board.txt
- How to assign GPIOs to a consumer device and a function
sysfs.txt