• Mikael Pettersson's avatar
    iop: clockevent support · 469d3044
    Mikael Pettersson authored
    This updates the IOP platform to expose the interrupting
    timer 0 as a clockevent object. The timer interrupt handler
    is changed to call the clockevent ->event_handler() instead
    of timer_tick(), and ->set_next_event() and ->set_mode()
    operations are added to allow the mode of the timer to be
    updated (required for ONESHOT/NOHZ mode).
    Timer 0 must now be properly initialised, which requires
    a new write_tcr0() function from the mach-specific code.
    The mode of timer 0 must be read at the start of ->set_mode(),
    which requires a new read_tmr0() function from the mach-
    specific code.
    Initial setup of timer 0 is also rewritten to be more robust.
    Tested on n2100, compile-tested for all plat-iop machines.
    Signed-off-by: default avatarMikael Pettersson <mikpe@it.uu.se>
    Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
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