serial: at91: support run time switch transfer mode

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We will switch to pio mode when request of dma or pdc fail.
But soon or later, when the request is success, the transfer mode can switch to them at
next open serial port action.
So in startup stage, we should get original transfer mode.

Signed-off-by: Elen Song <elen.song@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Elen Song 2013-07-22 16:30:28 +08:00 • committed by Greg Kroah-Hartman

parent 34df42f59a

commit 33d64c4ffa

1 changed files with 80 additions and 59 deletions

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139

drivers/tty/serial/atmel_serial.c

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