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| author | Sebastian Reichel <sebastian.reichel@collabora.co.uk> | 2018-05-24 19:30:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-25 17:54:43 +0200 |
| commit | 339c7a875732a34b1ebd7f14e2357c28858cd2d0 (patch) | |
| tree | 39ad69ed0c785fa1a73c778bdfa9c975d915da57 /drivers/tty/serial | |
| parent | serial: imx: drop CTS/RTS handling from shutdown (diff) | |
| download | linux-339c7a875732a34b1ebd7f14e2357c28858cd2d0.tar.xz linux-339c7a875732a34b1ebd7f14e2357c28858cd2d0.zip | |
serial: imx: disable UCR4_OREN on shutdown
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@ge.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/imx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index e146d66bf80c..4e853570ea80 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); /* |