1.. SPDX-License-Identifier: GPL-2.0 2 3==== 4GPIO 5==== 6 7.. toctree:: 8 :maxdepth: 1 9 10 Character Device Userspace API <../../userspace-api/gpio/chardev> 11 gpio-aggregator 12 gpio-sim 13 gpio-virtuser 14 Obsolete APIs <obsolete> 15