UCR4_OREN is (depending on the configuration) enabled in startup,
but is never disabled. Fix this by disabling it in shutdown.
Reported-by: Nandor Han <nandor.han@xxxxxx>
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
---
drivers/tty/serial/imx.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index a0fc0327c8a5..31e1df8a8d29 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1422,7 +1422,7 @@ static void imx_uart_shutdown(struct uart_port *port)
{
struct imx_port *sport = (struct imx_port *)port;
unsigned long flags;
- u32 ucr1, ucr2;
+ u32 ucr1, ucr2, ucr4;
if (sport->dma_is_enabled) {
dmaengine_terminate_sync(sport->dma_chan_tx);
@@ -1452,6 +1452,10 @@ static void imx_uart_shutdown(struct uart_port *port)
ucr2 = imx_uart_readl(sport, UCR2);
ucr2 &= ~(UCR2_TXEN | UCR2_ATEN);
imx_uart_writel(sport, ucr2, UCR2);
+
+ ucr4 = imx_uart_readl(sport, UCR4);
+ ucr4 &= ~UCR4_OREN;
+ imx_uart_writel(sport, ucr4, UCR4);
spin_unlock_irqrestore(&sport->port.lock, flags);
/*
--
2.17.0
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