GPIOs are identified as they are inside the kernel, using integers in
the range 0..INT_MAX. See Documentation/admin-guide/gpio for more information.
+ ::
+
/sys/class/gpio
/export ... asks the kernel to export a GPIO to userspace
/unexport ... to return a GPIO to the kernel
obsolete and when it can be expected to be removed.
.. kernel-abi:: $srctree/Documentation/ABI/obsolete
+ :rst:
===================
.. kernel-abi:: $srctree/Documentation/ABI/removed
+ :rst: