serial/8250: export serial8250_read_char

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Currently, we export serial8250_rx_chars, which does a whole bunch of
reads from the 8250 data register, without any form of flow control
between reads.

An upcoming change to the aspeed vuart driver implements more
fine-grained flow control in the interrupt handler, requiring
character-at-a-time control over the rx path.

This change exports serial8250_read_char to allow this.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Tested-by: Eddie James <eajames@linux.vnet.ibm.com>
Tested-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jeremy Kerr 2018-03-27 11:48:25 +08:00 • committed by Greg Kroah-Hartman

parent c5f78b1fe4

commit ebbaf9ab9e

2 changed files with 3 additions and 1 deletions

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3

drivers/tty/serial/8250/8250_port.c

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1

include/linux/serial_8250.h

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