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(parent: 27c8442) | patch
serial: imx: implement shadow registers for UCRx and UFCR
authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fri, 2 Mar 2018 10:07:20 +0000 (11:07 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 9 Mar 2018 18:21:01 +0000 (10:21 -0800)
commit3a0ab62f43de5c6ec55fb9d6721168602008142a
treec57e3c5448196442e1b6c61e1728f71505183126tree | snapshot
parent27c844261b87f85f23784e78170883092428e5a1commit | diff
serial: imx: implement shadow registers for UCRx and UFCR

This reduces the amount of read accesses to the register space by
shadowing the values for five registers that only change on writing
them. There is a single bit in UCR2 that might change without being
written to it, this is handled accordingly.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/imx.c diff | blob | history
Domain: System / Kernel;