linux-kernel - [PATCH 1/2] serial: bfin_5xx: IRDA is not affected by anomaly 05000230

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Message-Id: <1275305372-20523-1-git-send-email-vapier@gentoo.org>
Date:	Mon, 31 May 2010 07:29:31 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	linux-serial@...r.kernel.org, Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	uclinux-dist-devel@...ckfin.uclinux.org,
	linux-kernel@...r.kernel.org, Graf Yang <graf.yang@...log.com>
Subject: [PATCH 1/2] serial: bfin_5xx: IRDA is not affected by anomaly 05000230

From: Graf Yang <graf.yang@...log.com>

Anomaly 05000230 (over sampling of the UART STOP bit) applies only when
the peripheral is operating in UART mode.  So drop the anomaly handling
when the UART is in IRDA mode.

Signed-off-by: Graf Yang <graf.yang@...log.com>
Signed-off-by: Mike Frysinger <vapier@...too.org>
---
 drivers/serial/bfin_5xx.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 96f7e74..a78652b 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -869,7 +869,12 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
 	}
 
 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
-	quot = uart_get_divisor(port, baud) - ANOMALY_05000230;
+	quot = uart_get_divisor(port, baud);
+
+	/* If discipline is not IRDA, apply ANOMALY_05000230 */
+	if (termios->c_line != N_IRDA)
+		quot -= ANOMALY_05000230;
+
 	spin_lock_irqsave(&uart->port.lock, flags);
 
 	UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15);
-- 
1.7.1

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