add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Locally computed:
sha256 734a1d5f21fb388bdbe64f7b599fef52357c3c72ff860f38456a352e7c1c3e78  dsp-tools-v2.0.tar.gz