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    SubjectRe: [PATCH] atmel_serial: Filter out FP during baud rate detection
    "Andrew Victor" <avictor.za@gmail.com> 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 <haavard.skinnemoen@atmel.com>
    >
    > Acked-by: Andrew Victor <linux@maxim.org.za>

    Thanks.

    > 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.

    Haavard


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