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| author |   Jeremy Kerr <jk@ozlabs.org> | 2018-03-27 11:48:25 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-23 10:16:50 +0200 |
| commit | ebbaf9ab9ebd69f42b286c7a67cc84571c3d947a (patch) | |
| tree | 188d96c0710790f69f68f79cf09c30bb9c1a720e /include/linux/serial_8250.h | |
| parent | serial: Introduce UPSTAT_SYNC_FIFO for synchronised FIFOs (diff) | |
| download | linux-dev-ebbaf9ab9ebd69f42b286c7a67cc84571c3d947a.tar.xz linux-dev-ebbaf9ab9ebd69f42b286c7a67cc84571c3d947a.zip | |
serial/8250: export serial8250_read_char
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>
Diffstat (limited to 'include/linux/serial_8250.h')
| -rw-r--r-- | include/linux/serial_8250.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index a27ef5f56431..76b9db71e489 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -163,6 +163,7 @@ extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl); extern int fsl8250_handle_irq(struct uart_port *port); int serial8250_handle_irq(struct uart_port *port, unsigned int iir); unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); +void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr); void serial8250_tx_chars(struct uart_8250_port *up); unsigned int serial8250_modem_status(struct uart_8250_port *up); void serial8250_init_port(struct uart_8250_port *up); |