RPI_PWM_PERIOD_NS
if (state->period < RPI_PWM_PERIOD_NS ||
else if (state->duty_cycle < RPI_PWM_PERIOD_NS)
RPI_PWM_PERIOD_NS);
state->period = RPI_PWM_PERIOD_NS;
state->duty_cycle = DIV_ROUND_UP(rpipwm->duty_cycle * RPI_PWM_PERIOD_NS,