diff options
| author | Peter Ma <pma@mediamatech.com> | 2009-03-31 19:31:02 +0200 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2009-04-01 16:13:51 +0200 |
| commit | 8e706c4d0dab214c625a2df84a0ca69a76bae65d (patch) | |
| tree | fdcea60fc9364e4c1a38d719e9bb3794fa2d6852 /drivers/serial/atmel_serial.c | |
| parent | avr32: add RTS/CTS/CLK pin selection for the USARTs (diff) | |
| download | linux-8e706c4d0dab214c625a2df84a0ca69a76bae65d.tar.xz linux-8e706c4d0dab214c625a2df84a0ca69a76bae65d.zip | |
avr32: add hardware handshake support to atmel_serial
Adds Hardware Handshake (aka RTS/CTS flow-control) support to
atmel_serial driver, as a termios flag.
For this to actually work, the platform code needs to configure the RTS
and CTS pins for use by the USART. This has been done for AVR32 as a
separate patch.
Signed-off-by: Peter Ma <pma@mediamatech.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Diffstat (limited to 'drivers/serial/atmel_serial.c')
| -rw-r--r-- | drivers/serial/atmel_serial.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index 8f58f7ff0dd7..b3497d7e5354 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -1020,7 +1020,8 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, /* Get current mode register */ mode = UART_GET_MR(port) & ~(ATMEL_US_USCLKS | ATMEL_US_CHRL - | ATMEL_US_NBSTOP | ATMEL_US_PAR); + | ATMEL_US_NBSTOP | ATMEL_US_PAR + | ATMEL_US_USMODE); baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); quot = uart_get_divisor(port, baud); @@ -1065,6 +1066,12 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, } else mode |= ATMEL_US_PAR_NONE; + /* hardware handshake (RTS/CTS) */ + if (termios->c_cflag & CRTSCTS) + mode |= ATMEL_US_USMODE_HWHS; + else + mode |= ATMEL_US_USMODE_NORMAL; + spin_lock_irqsave(&port->lock, flags); port->read_status_mask = ATMEL_US_OVRE; |