From c67643b46c28fc8bb7d81c65bc7eef18c3fbe972 Mon Sep 17 00:00:00 2001 From: Fugang Duan Date: Thu, 25 Nov 2021 09:43:06 +0800 Subject: [PATCH] tty: serial: imx: clear the RTSD status before enable the RTSD irq MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Fugang Duan Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20211125014306.4432-1-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- 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 90f82e6c54e46..fb75e3e0d828c 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); } } -- 2.30.2