cvs commit: src/sys/dev/uart uart_dev_ns8250.c

Marcel Moolenaar marcel at
Wed Mar 28 18:35:04 UTC 2007

marcel      2007-03-28 18:34:59 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/uart         uart_dev_ns8250.c 
  For embedded UARTs compatible with the ns8250 family it is possible
  that the driver clock is identical to the processor or bus clock.
  This is the case for the PowerQUICC processor. When the clock is
  high enough, overflows happen in the calculation of the time it
  takes to send 1/10 of a character, used in delay loops. Fix the
  overflows so as to fix bugs in the delay loops that can cause either
  insufficient delays or excessive delays.
  Revision  Changes    Path
  1.25      +3 -1      src/sys/dev/uart/uart_dev_ns8250.c

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