serial: 8250: Set Altera 16550 TX FIFO Threshold

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The Altera 16550 soft IP UART requires 2 additional registers for
TX FIFO threshold support. These 2 registers enable the TX FIFO
Low Watermark and set the TX FIFO Low Watermark.
Set the TX FIFO threshold to the FIFO size - tx_loadsz.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Thor Thayer 2016-09-22 14:56:16 -05:00 • committed by Greg Kroah-Hartman

parent ffea043965

commit 8e5470c983

2 changed files with 51 additions and 0 deletions

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include/uapi/linux/serial_reg.h

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