diff options
| author | Fugang Duan <fugang.duan@nxp.com> | 2021-11-25 09:43:06 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-25 18:38:19 +0100 |
| commit | c67643b46c28fc8bb7d81c65bc7eef18c3fbe972 (patch) | |
| tree | 8c521671a6ddecfb2f05552e67ed81b1069f971a | |
| parent | d78328bcc4d0e677f2ff83f4ae1f43c933fbd143 (diff) | |
tty: serial: imx: clear the RTSD status before enable the RTSD irq
Clear RTSD status before enabling the irq event for RTSD in
imx_uart_enable_wakeup function.
Since RTSD can be set as the wakeup source, this can avoid any risk of
false triggering of a wake-up interrupts.
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20211125014306.4432-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/imx.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 90f82e6c54e4..fb75e3e0d828 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -2482,10 +2482,12 @@ static void imx_uart_enable_wakeup(struct imx_port *sport, bool on) if (sport->have_rtscts) { u32 ucr1 = imx_uart_readl(sport, UCR1); - if (on) + if (on) { + imx_uart_writel(sport, USR1_RTSD, USR1); ucr1 |= UCR1_RTSDEN; - else + } else { ucr1 &= ~UCR1_RTSDEN; + } imx_uart_writel(sport, ucr1, UCR1); } } |