pwm_mediatek_writel
pwm_mediatek_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | wfhw->con);
pwm_mediatek_writel(pc, pwm->hwpwm, reg_width, wfhw->width);
pwm_mediatek_writel(pc, pwm->hwpwm, reg_thres, wfhw->thres);