serial: meson: add Magic SysRq support

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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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Yixun Lan 2017-09-06 21:52:39 +08:00 • committed by Greg Kroah-Hartman

parent 2bd6bf03f4

commit b86ac22503

1 changed files with 16 additions and 2 deletions

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18

drivers/tty/serial/meson_uart.c

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