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From 4dc6f2b9d454099445b8bc3a4a6328761335ce4d Mon Sep 17 00:00:00 2001
From: Fugang Duan <fugang.duan@nxp.com>
Date: Wed, 11 Sep 2019 16:23:25 +0800
Subject: [PATCH] tty: serial: fsl_lpuart: enable loopback mode
Enable lpuart32 loopback mode.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
---
drivers/tty/serial/fsl_lpuart.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1474,6 +1474,14 @@ static void lpuart32_set_mctrl(struct ua
temp |= UARTMODIR_TXCTSE;
lpuart32_write(port, temp, UARTMODIR);
+
+ temp = lpuart32_read(port, UARTCTRL);
+ if (mctrl & TIOCM_LOOP)
+ temp |= UARTCTRL_LOOPS;
+ else
+ temp &= ~UARTCTRL_LOOPS;
+
+ lpuart32_write(port, temp, UARTCTRL);
}
static void lpuart_break_ctl(struct uart_port *port, int break_state)
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