sc16is7xx: Preserve EFR bits on update

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Preserve unaffected bits state when accessing EFR register. This
prevents hardware flow control bits from being cleared on enhanced
functions access.

Signed-off-by: Lech Perczak <l.perczak@camlintechnologies.com>
Signed-off-by: Tomasz Moń <tomasz.mon@camlingroup.com>
Link: https://lore.kernel.org/r/20220221105618.3503470-2-tomasz.mon@camlingroup.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Lech Perczak 2022-02-21 11:56:13 +01:00 • committed by Greg Kroah-Hartman

parent 932d596378

commit c112653b89

1 changed files with 19 additions and 5 deletions

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drivers/tty/serial/sc16is7xx.c

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