Bhuvanchandra DV 6250cc30c4 tty: serial: fsl_lpuart: Use scatter/gather DMA for Tx
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>
2016-08-31 15:48:29 +02:00
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