2020-04-10 02:47:05 +00:00
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From 4dc6f2b9d454099445b8bc3a4a6328761335ce4d Mon Sep 17 00:00:00 2001
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From: Fugang Duan <fugang.duan@nxp.com>
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Date: Wed, 11 Sep 2019 16:23:25 +0800
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Subject: [PATCH] tty: serial: fsl_lpuart: enable loopback mode
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Enable lpuart32 loopback mode.
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Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
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---
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drivers/tty/serial/fsl_lpuart.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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--- a/drivers/tty/serial/fsl_lpuart.c
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+++ b/drivers/tty/serial/fsl_lpuart.c
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2020-11-11 20:30:36 +00:00
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@@ -1477,6 +1477,14 @@ static void lpuart32_set_mctrl(struct ua
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2020-04-10 02:47:05 +00:00
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temp |= UARTMODIR_TXCTSE;
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lpuart32_write(port, temp, UARTMODIR);
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+
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+ temp = lpuart32_read(port, UARTCTRL);
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+ if (mctrl & TIOCM_LOOP)
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+ temp |= UARTCTRL_LOOPS;
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+ else
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+ temp &= ~UARTCTRL_LOOPS;
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+
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+ lpuart32_write(port, temp, UARTCTRL);
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}
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static void lpuart_break_ctl(struct uart_port *port, int break_state)
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