[ARM] 5244/1: Add hardware CTSRTS flow control to pxa serial driver

Adds hardware CTSRTS control for pxa serial devices through
termios controls.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index f7a0d37c4221..abc00be55433 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -534,6 +534,11 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
 
         serial_out(up, UART_IER, up->ier);
 
+        if (termios->c_cflag & CRTSCTS)
+                up->mcr |= UART_MCR_AFE;
+        else
+                up->mcr &= ~UART_MCR_AFE;
+
         serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
         serial_out(up, UART_DLL, quot & 0xff);          /* LS of divisor */
         serial_out(up, UART_DLM, quot >> 8);            /* MS of divisor */