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 <[email protected]> Signed-off-by: Sebastian Reichel <[email protected]> --- 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
