• mario.six@gdsys.cc's avatar
    cmd: misc: Add support for fractions in sleep · c4974632
    mario.six@gdsys.cc authored
    A feasible way to communicate certain errors for devices that have no
    other way of signalling besides LEDs is to flash these LEDs. For errors
    in U-Boot, a script that utilizes the led and sleep commands would be a
    practicable way, but currently the sleep command can only delay for an
    integral amount of seconds, which is too slow to create an easily
    noticeable pattern for flashing LEDs.
    
    Therefore, this patch adds support for fractions (down to .001 seconds)
    to the sleep command.
    
    The parsing is kept minimal, simplistic and as robust as possible: After
    converting the passed string using simple_strtoul and multiplying it
    with 1000, we search for the first dot, convert the three characters
    after that into a number (if they are not numbers, we ignore the
    fractional part and just use the delay we got from simple_strtoul), and
    add this number to the delay.
    Signed-off-by: default avatarMario Six <mario.six@gdsys.cc>
    c4974632
misc.c 1.57 KB