add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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SSV_DFS_FILE=/sys/kernel/debug/ssv/ssv_cmd
if [ -f $SSV_DFS_FILE ]; then
    echo "$*" > $SSV_DFS_FILE
    cat $SSV_DFS_FILE
fi