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tty: serial: imx: clear the RTSD status before enable the RTSD irq

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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>
This commit is contained in:
Fugang Duan 2021-11-25 09:43:06 +08:00 committed by Greg Kroah-Hartman
parent d78328bcc4
commit c67643b46c
1 changed files with 4 additions and 2 deletions
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6
drivers/tty/serial/imx.c
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@ -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);
}
}