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The hvc tty driver doesn't populate a file like /proc/tty/driver/serial, so the current implementation of start_getty doesn't work for the hvc console. By checking the /sys/class/tty/ for the tty device existence, it should support more console types and also make the codes more simple. (From OE-Core rev: 670ceef0f6584ece5ce4176610255226a6148570) Signed-off-by: Kevin Hao <kexin.hao@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>