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OMAP: Enable Magic SysRq on serial console ttyOx 

Magic SysRq key is not working for OMAP on new serial
console ttyOx because SUPPORT_SYSRQ is not defined
for omap-serial.

This patch defines SUPPORT_SYSRQ in omap-serial and
enables handling of Magic SysRq character.

Further there is an issue of losing first break character.
Removing the reset of the lsr_break_flag fixes this issue.

Signed-off-by: Thomas Weber <weber@corscience.de>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Tested-by: Manjunath G Kondaiah <manjugk@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Thomas Weber 2011-02-01 08:30:41 +01:00 committed by Greg Kroah-Hartman
parent 2f1522eccb
commit 364a6ece62
1 changed files with 4 additions and 1 deletions
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5
drivers/tty/serial/omap-serial.c
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@ -20,6 +20,10 @@
* this driver as required for the omap-platform.
*/
#if defined(CONFIG_SERIAL_OMAP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
#include <linux/module.h>
#include <linux/init.h>
#include <linux/console.h>
@ -190,7 +194,6 @@ static inline void receive_chars(struct uart_omap_port *up, int *status)
if (up->port.line == up->port.cons->index) {
/* Recover the break flag from console xmit */
lsr |= up->lsr_break_flag;
up->lsr_break_flag = 0;
}
#endif
if (lsr & UART_LSR_BI)