On Wed, 2009-10-28 at 08:12 +0100, ext Govindraj.R wrote:
> From a3f0e5a13c1bc5046110cae513878183df2215c6 Mon Sep 17 00:00:00 2001
> From: Govindraj R <govindraj.raja@xxxxxx>
> Date: Wed, 28 Oct 2009 12:21:03 +0530
> Subject: [PATCHv2 1/3] OMAP UART: Add omap-serial driver support.
>
> This patch adds support for OMAP3430-HIGH SPEED UART Controller.
On OMAP3630 a patch is needed for proper operation. Most probably this
does not break compatibility, at least similar fix to 8250.c worked fine
on OMAP3430 ES3.1.
-- clip --
>From f6d31ecfd74e0369c9162bdbcfb40b56aedd2a2b Mon Sep 17 00:00:00 2001
From: Ari Kauppi <Ext-Ari.Kauppi@xxxxxxxxx>
Date: Wed, 28 Oct 2009 12:02:47 +0200
Subject: [PATCH] omap-serial: Do not read UART_RX if UART_LSR_DR is not
set.
Causes external abort on non-linefetch with 3630 if the bit is not
checked.
---
drivers/serial/omap-serial.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c
index 0239209..2a65a36 100644
--- a/drivers/serial/omap-serial.c
+++ b/drivers/serial/omap-serial.c
@@ -483,8 +483,8 @@ static int serial_omap_startup(struct uart_port
*port)
/*
* Clear the interrupt registers.
*/
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
+ if (serial_in(up, UART_LSR) & UART_LSR_DR)
+ (void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
(void) serial_in(up, UART_MSR);
@@ -570,7 +570,8 @@ static void serial_omap_shutdown(struct uart_port
*port)
/*
* Read data port to reset things, and then free the irq
*/
- (void) serial_in(up, UART_RX);
+ if (serial_in(up, UART_LSR) & UART_LSR_DR)
+ (void) serial_in(up, UART_RX);
if (up->use_dma) {
int tmp;
if (up->is_buf_dma_alloced) {
--
1.6.4.2
-- clip --
--
Ari
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
