Messages in this thread Patch in this message | | | From | Sherry Sun <> | Subject | [PATCH V2] tty: serial: imx: clear the RTSD status before enable the RTSD irq | Date | Tue, 23 Nov 2021 18:45:28 +0800 |
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From: Fugang Duan <fugang.duan@nxp.com>
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.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com> Signed-off-by: Sherry Sun <sherry.sun@nxp.com> --- changes in V2: - change the subject and the commit message as suggested by Uwe. --- drivers/tty/serial/imx.c | 6 ++++-- 1 file 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); } } -- 2.17.1
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