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Subject[PATCH] atmel_serial: Filter out FP during baud rate detection
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 <>
drivers/serial/atmel_serial.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index c065a70..42be8b0 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -1318,7 +1318,7 @@ static void __init atmel_console_get_options(struct uart_port *port, int *baud,
* 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)


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