serial: fsl_lpuart: add loopback support

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The LPUART can loop the RX and TX signal. Add support for it.

Please note, this was only tested on the 32 bit version of the LPUART.

Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20210512141255.18277-9-michael@walle.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Michael Walle 2021-05-12 16:12:54 +02:00 • committed by Greg Kroah-Hartman

parent fa35407354

commit 8a0c810d94

1 changed files with 34 additions and 2 deletions

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drivers/tty/serial/fsl_lpuart.c

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