[lkml]   [2008]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] atmel_serial: Filter out FP during baud rate detection
    "Andrew Victor" <> wrote:
    > > 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.
    > > Signed-off-by: Haavard Skinnemoen <>
    > Acked-by: Andrew Victor <>


    > The FP (Fractional Part) is not supported on some AT91 processors
    > (RM9200, SAM9261) though.
    > Those bits in BRGR are undefined.

    Yes...I guess that's one more reason to filter them out.

    FWIW, the u-boot patch explicitly excludes those two processors,
    falling back to the existing CD calculation code.


     \ /
      Last update: 2008-05-28 09:07    [W:0.019 / U:3.668 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site