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Commit e6e7d6ba authored by Fabio Estevam's avatar Fabio Estevam Committed by Greg Kroah-Hartman
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serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS 



commit 38b1f0fb42f772b8c9aac53593883a18ff5eb9d7 upstream.

The wakeup mechanism via RTSDEN bit relies on the system using the RTS/CTS
lines, so only allow such wakeup method when the system actually has
RTS/CTS support.

Fixes: bc85734b ("serial: imx: allow waking up on RTSD")
Signed-off-by: default avatarFabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: default avatarMartin Kaiser <martin@kaiser.cx>
Acked-by: default avatarFugang Duan <fugang.duan@nxp.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 24293a39

drivers/tty/serial/imx.c

+8 −6
Original line number Diff line number Diff line
@@ -2275,6 +2275,7 @@ static void serial_imx_enable_wakeup(struct imx_port *sport, bool on) 
		val &= ~UCR3_AWAKEN;

	writel(val, sport->port.membase + UCR3);



	if (sport->have_rtscts) {

		val = readl(sport->port.membase + UCR1);

		if (on)

			val |= UCR1_RTSDEN;
@@ -2282,6 +2283,7 @@ static void serial_imx_enable_wakeup(struct imx_port *sport, bool on) 
			val &= ~UCR1_RTSDEN;

		writel(val, sport->port.membase + UCR1);

	}

}



static int imx_serial_port_suspend_noirq(struct device *dev)

{