serial_pl011: Set RTS during initialization

If the pl011 is connected to another device which has hardware
flow-control on, characters are never received by the pl011.
Asserting RTS when flow-control is off will have no effect.

This is in line with how Linux behaves.

Signed-off-by: Joshua Housh <joshua.housh@calxeda.com>
Tested-by: Marek Vasut <marex@denx.de>

diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
index b331be794badb8f5d84710ba693348ca9600bc2e..dfdba9f64eb8031144d6be6b2722f070df3cf047 100644 (file)
--- a/drivers/serial/serial_pl01x.c
+++ b/drivers/serial/serial_pl01x.c
@@ -163,8 +163,8 @@ static int pl01x_serial_init(void)
        }
 #endif
        /* Finally, enable the UART */
-       writel(UART_PL011_CR_UARTEN | UART_PL011_CR_TXE | UART_PL011_CR_RXE,
-              &regs->pl011_cr);
+       writel(UART_PL011_CR_UARTEN | UART_PL011_CR_TXE | UART_PL011_CR_RXE |
+              UART_PL011_CR_RTS, &regs->pl011_cr);
 
        return 0;
 }