tty: serial: fsl_lpuart: set RTS watermark for lpuart

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Add RTS watermark support for LPUART. The RX RTS_B output negates when
the number of empty words in the receive FIFO is greater or equal to
RTSWATER. Here set the RTSWATER to half of the rxfifo_size.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20230130064449.9564-6-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Sherry Sun 2023-01-30 14:44:48 +08:00 • committed by Greg Kroah-Hartman

parent 96f54fd489

commit ecba98f9dd

1 changed files with 8 additions and 0 deletions

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drivers/tty/serial/fsl_lpuart.c

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