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authorYixun Lan <dlan@gentoo.org>2017-09-06 21:52:39 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-09-18 18:31:48 +0200
commitb86ac225037900963b1203344e5d129f5af6bbd2 (patch)
tree4c0e0ccf9cb5323dd631752d2bf2de5d2a880807 /drivers/tty/tty_port.c
parent2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e (diff)
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serial: meson: add Magic SysRq support
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>
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