The patch titled
atmel_serial: filter out FP during baud rate detection
has been added to the -mm tree. Its filename is
atmel_serial-filter-out-fp-during-baud-rate-detection.patch
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------------------------------------------------------
Subject: atmel_serial: filter out FP during baud rate detection
From: Haavard Skinnemoen <haavard.skinnemoen@xxxxxxxxx>
I made a change to u-boot that used the FP (Fractional Part) field of BRGR
to achieve more accurate baud rate generation. Unfortunately, the
atmel_serial driver looks at the whole BRGR register when trying to detect
the baud rate that the port is currently running at, so setting FP to a
nonzero value breaks the baud rate detection.
I'll sit on the u-boot patch for a while longer, but this is clearly a
bug in the atmel_serial driver which should be fixed.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@xxxxxxxxx>
Acked-by: Andrew Victor <linux@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/serial/atmel_serial.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/serial/atmel_serial.c~atmel_serial-filter-out-fp-during-baud-rate-detection drivers/serial/atmel_serial.c
--- a/drivers/serial/atmel_serial.c~atmel_serial-filter-out-fp-during-baud-rate-detection
+++ a/drivers/serial/atmel_serial.c
@@ -1318,7 +1318,7 @@ static void __init atmel_console_get_opt
* If the baud rate generator isn't running, the port wasn't
* initialized by the boot loader.
*/
- quot = UART_GET_BRGR(port);
+ quot = UART_GET_BRGR(port) & ATMEL_US_CD;
if (!quot)
return;
_
Patches currently in -mm which might be from haavard.skinnemoen@xxxxxxxxx are
linux-next.patch
atmel_serial-filter-out-fp-during-baud-rate-detection.patch
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