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(parent: 3181248) | 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)
commitcbdc2ff4465d936e5d489496df82920599a064b7
treec57e3c5448196442e1b6c61e1728f71505183126tree | snapshot
parent31812481f5eb87850aad141e687a4adf04364d15commit | 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
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