Commit c67643b4 authored Nov 25, 2021 by Fugang Duan Committed by Greg Kroah-Hartman Nov 25, 2021

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>

parent d78328bc

drivers/tty/serial/imx.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -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);
		}
		}