1 From 4dc6f2b9d454099445b8bc3a4a6328761335ce4d Mon Sep 17 00:00:00 2001
2 From: Fugang Duan <fugang.duan@nxp.com>
3 Date: Wed, 11 Sep 2019 16:23:25 +0800
4 Subject: [PATCH] tty: serial: fsl_lpuart: enable loopback mode
6 Enable lpuart32 loopback mode.
8 Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
10 drivers/tty/serial/fsl_lpuart.c | 8 ++++++++
11 1 file changed, 8 insertions(+)
13 --- a/drivers/tty/serial/fsl_lpuart.c
14 +++ b/drivers/tty/serial/fsl_lpuart.c
15 @@ -1462,6 +1462,14 @@ static void lpuart32_set_mctrl(struct ua
16 temp |= UARTMODIR_TXCTSE;
18 lpuart32_write(port, temp, UARTMODIR);
20 + temp = lpuart32_read(port, UARTCTRL);
21 + if (mctrl & TIOCM_LOOP)
22 + temp |= UARTCTRL_LOOPS;
24 + temp &= ~UARTCTRL_LOOPS;
26 + lpuart32_write(port, temp, UARTCTRL);
29 static void lpuart_break_ctl(struct uart_port *port, int break_state)