add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# From https://www.kernel.org/pub/linux/kernel/people/kdave/btrfs-progs/sha256sums.asc
sha256 805bdb0031c21a0a5d2ba295a8c9bdd8ba831a68c3fa801aab85677ec902d783  btrfs-progs-v4.13.3.tar.xz
# Locally computed
sha256 0d5bf346df9e635a29dcdddf832dc5b002ca6cdc1c5c9c6c567d2a61bb0c5c15  COPYING