When specifying flag SER_RS485_RTS_ON_SEND in RS485 configuration,
we get the following warning after commit 4afeced55baa ("serial: core:
fix sanitizing check for RTS settings"):
invalid RTS setting, using RTS_AFTER_SEND instead
This results in SER_RS485_RTS_AFTER_SEND being set and the
driver always write to the register field SC16IS7XX_EFCR_RTS_INVERT_BIT,
which breaks some hardware using these chips.
The hardware supports both RTS_ON_SEND and RTS_AFTER_SEND modes, so fix
this by announcing support for RTS_ON_SEND.
This patch is extracted from my XR20M117X series as it is affect all SC16IS7XX hardware.
This bug affects all kernel series from 6.1 onwards.
Konstantin Pugin (1):
serial: sc16is7xx: announce support of SER_RS485_RTS_ON_SEND
drivers/tty/serial/sc16is7xx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
base-commit: 660a708098569a66a47d0abdad998e29e1259de6
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2.44.0
