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Commit f1f836e4 authored by Alexander Stein's avatar Alexander Stein Committed by Greg Kroah-Hartman
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serial: imx: Add Rx Fifo overrun error message 



This patch enables the overrun error (ORE) interrupt and increases the
counter in case of overrun.

Signed-off-by: default avatarAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ea33640a

drivers/tty/serial/imx.c

+15 −0
Original line number Original line Diff line number Diff line
@@ -449,6 +449,13 @@ static void imx_start_tx(struct uart_port *port) 
		temp &= ~(UCR1_RRDYEN);

		temp &= ~(UCR1_RRDYEN);

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

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

	}

	}

	/* Clear any pending ORE flag before enabling interrupt */

	temp = readl(sport->port.membase + USR2);

	writel(temp | USR2_ORE, sport->port.membase + USR2);



	temp = readl(sport->port.membase + UCR4);

	temp |= UCR4_OREN;

	writel(temp, sport->port.membase + UCR4);





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

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

	writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1);

	writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1);
@@ -582,6 +589,7 @@ static irqreturn_t imx_int(int irq, void *dev_id) 
{

{

	struct imx_port *sport = dev_id;

	struct imx_port *sport = dev_id;

	unsigned int sts;

	unsigned int sts;

	unsigned int sts2;





	sts = readl(sport->port.membase + USR1);

	sts = readl(sport->port.membase + USR1);
@@ -598,6 +606,13 @@ static irqreturn_t imx_int(int irq, void *dev_id) 
	if (sts & USR1_AWAKE)

	if (sts & USR1_AWAKE)

		writel(USR1_AWAKE, sport->port.membase + USR1);

		writel(USR1_AWAKE, sport->port.membase + USR1);





	sts2 = readl(sport->port.membase + USR2);

	if (sts2 & USR2_ORE) {

		dev_err(sport->port.dev, "Rx FIFO overrun\n");

		sport->port.icount.overrun++;

		writel(sts2 | USR2_ORE, sport->port.membase + USR2);

	}



	return IRQ_HANDLED;

	return IRQ_HANDLED;

}

}