From 8e706c4d0dab214c625a2df84a0ca69a76bae65d Mon Sep 17 00:00:00 2001 From: Peter Ma Date: Tue, 31 Mar 2009 10:31:02 -0700 Subject: 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 Signed-off-by: Haavard Skinnemoen Acked-by: Alan Cox --- drivers/serial/atmel_serial.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/serial/atmel_serial.c') diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index 8f58f7f..b3497d7 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; -- cgit v1.1