[PATCH 2/2] tty: serial: fsl_lpuart: writing a 1 and then a 0 to trigger a break character

[Sherry Sun]

According to the lpuart reference manual, need to writing a 1 and then a
0 to the UARTCTRL_SBK field queues a break character in the transmit
data stream. Only writing a 1 cannot trigger the break character, so fix
it.

Fixes: 380c966c093e ("tty: serial: fsl_lpuart: add 32-bit register interface support")
Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx>
---
 drivers/tty/serial/fsl_lpuart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index b6365566a460..8a4aae7dbd99 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1486,7 +1486,7 @@ static void lpuart32_break_ctl(struct uart_port *port, int break_state)
 	temp = lpuart32_read(port, UARTCTRL) & ~UARTCTRL_SBK;
 
 	if (break_state != 0)
-		temp |= UARTCTRL_SBK;
+		lpuart32_write(port, temp | UARTCTRL_SBK, UARTCTRL);
 
 	lpuart32_write(port, temp, UARTCTRL);
 }
-- 
2.17.1