From: Sherry Sun <sherry.sun@nxp.com>
To: gregkh@linuxfoundation.org, jirislaby@kernel.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-imx@nxp.com
Subject: [PATCH] tty: serial: imx: disable UCR4_OREN in .stop_rx()
Date: Tue, 23 Nov 2021 15:04:37 +0800 [thread overview]
Message-ID: <20211123070437.20153-1-sherry.sun@nxp.com> (raw)
From: Fugang Duan <fugang.duan@nxp.com>
Disable UCR4_OREN bit in .stop_rx() to avoid endless
interrupt happen while tty port is closing.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
---
drivers/tty/serial/imx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index fb75e3e0d828..9ecaf051249d 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -486,18 +486,21 @@ static void imx_uart_stop_tx(struct uart_port *port)
static void imx_uart_stop_rx(struct uart_port *port)
{
struct imx_port *sport = (struct imx_port *)port;
- u32 ucr1, ucr2;
+ u32 ucr1, ucr2, ucr4;
ucr1 = imx_uart_readl(sport, UCR1);
ucr2 = imx_uart_readl(sport, UCR2);
+ ucr4 = imx_uart_readl(sport, UCR4);
if (sport->dma_is_enabled) {
ucr1 &= ~(UCR1_RXDMAEN | UCR1_ATDMAEN);
} else {
ucr1 &= ~UCR1_RRDYEN;
ucr2 &= ~UCR2_ATEN;
+ ucr4 &= ~UCR4_OREN;
}
imx_uart_writel(sport, ucr1, UCR1);
+ imx_uart_writel(sport, ucr4, UCR4);
ucr2 &= ~UCR2_RXEN;
imx_uart_writel(sport, ucr2, UCR2);
--
2.17.1
next reply other threads:[~2021-11-23 7:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 7:04 Sherry Sun [this message]
2021-11-23 7:51 ` [PATCH] tty: serial: imx: disable UCR4_OREN in .stop_rx() Uwe Kleine-König
2021-11-23 8:43 ` Uwe Kleine-König
2021-11-23 9:05 ` Sherry Sun
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