Commit 6376cd39 authored Jun 28, 2017 by Nandor Han Committed by Greg Kroah-Hartman Jun 29, 2017

serial: imx: Enable RTSD only when needed



Currently, this IRQ is always enabled. Some devices might mux these pins
to other I/Os, like I2C. This could lead to spurious interrupts.

This commit makes this IRQ optional, by using the field have_rtscts.

Signed-off-by: Nandor Han <nandor.han@ge.com>
Signed-off-by: Romain Perier <romain.perier@collabora.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 5ac88295

drivers/tty/serial/imx.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1299,7 +1299,9 @@ static int imx_startup(struct uart_port *port)
		imx_enable_dma(sport);

		temp = readl(sport->port.membase + UCR1);
		temp \|= UCR1_RRDYEN \| UCR1_RTSDEN \| UCR1_UARTEN;
		temp \|= UCR1_RRDYEN \| UCR1_UARTEN;
		if (sport->have_rtscts)
		temp \|= UCR1_RTSDEN;

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