tty: serial: fsl_lpuart: Use scatter/gather DMA for Tx

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Drop PIO to DMA switching and use scatter/gather DMA for Tx path to improve
performance.

Some part of the code is borrowed from imx serial driver.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Bhuvanchandra DV 2016-07-19 13:13:08 +05:30 • committed by Greg Kroah-Hartman

parent 5887ad43ee

commit 6250cc30c4

1 changed files with 113 additions and 144 deletions

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257

drivers/tty/serial/fsl_lpuart.c

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