vt8500_pwm_busy_wait
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_SCALAR_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_PERIOD_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_DUTY_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);
vt8500_pwm_busy_wait(chip, pwm->hwpwm, STATUS_CTRL_UPDATE);