b86ac22503
This dirver try to implement the Magic SysRq support[1] for Amlogic Inc's meson platfo >From the hardware perspective, the UART IP can't detect the 'BREAK' command clearly via the status register. Instead, we rely on the combination of 'FRAME_ERR bit && ch == 0', and it works fine. [1] Documentation/admin-guide/sysrq.rst Signed-off-by: Yixun Lan <dlan@gentoo.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>