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Commit 39f80919 authored by Lanqing Liu's avatar Lanqing Liu Committed by Greg Kroah-Hartman
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serial: sprd: Add polling IO support



In order to access the UART without the interrupts, the kernel uses
the basic polling methods for IO with the device. With these methods
implemented, it is now possible to enable kgdb during early boot over serial.

Signed-off-by: default avatarLanqing Liu <liuhhome@gmail.com>
Reviewed-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Tested-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Link: https://lore.kernel.org/r/f112a741c053ac5fb0637e2f058be81e17f78ccc.1568862391.git.liuhhome@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 76c38d30
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