linux-kernel - [PATCH V2 3/5] tty: serial: fsl_lpuart: clear UARTMODIR register in lpuart32

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Date:   Thu, 10 Nov 2022 16:17:26 +0800
From:   Sherry Sun <sherry.sun@....com>
To:     gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc:     michael@...le.cc, jingchang.lu@...escale.com,
        tomonori.sakita@...d.co.jp, atsushi.nemoto@...d.co.jp,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-imx@....com
Subject: [PATCH V2 3/5] tty: serial: fsl_lpuart: clear UARTMODIR register in lpuart32_shutdown()

UARTMODIR register is configured in lpuart32_set_termios() according to
the termios flags, but nowhere clear it, should clear it when shutdown
the uart port.

Fixes: 380c966c093e ("tty: serial: fsl_lpuart: add 32-bit register interface support")
Signed-off-by: Sherry Sun <sherry.sun@....com>
---
Changes in V2:
1. Split one patch into four smaller patches to improve the commit
messages and add Fixes tag as suggested by Ilpo.
---
 drivers/tty/serial/fsl_lpuart.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index dbf8cccea105..a6f7b056d57b 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1775,6 +1775,7 @@ static void lpuart32_shutdown(struct uart_port *port)
 			UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE |
 			UARTCTRL_LOOPS);
 	lpuart32_write(port, temp, UARTCTRL);
+	lpuart32_write(port, 0, UARTMODIR);
 
 	spin_unlock_irqrestore(&port->lock, flags);
 
-- 
2.17.1