ARM64: dts: meson-gxbb-nanopi-k2: Add GPIO lines names
This patch describes the GPIO lines usage on the Nanopi K2 board. This is useful in the debugfs gpio file and using the cdev gpio API. Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com> Signed-off-by: NKevin Hilman <khilman@baylibre.com>
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