check_clock
check_clock(timer_freq, rate, 0x3FF, 1, 1, best, &diff, reg);
check_clock(timer_freq, rate, a - 1, 1, 1, best, &diff, reg);
!check_clock(timer_freq, rate, a - 1, 1, 1, best,
check_clock(timer_freq, rate, a, b, 0xFFF, best,
if (!check_clock(timer_freq, rate, a, b, c, best, &diff, reg))
if (!check_clock(timer_freq, rate, a, b, c + 1, best, &diff,