LOONGSON_PWM_REG_CTRL
val = pwm_loongson_readl(ddata, LOONGSON_PWM_REG_CTRL);
pwm_loongson_writel(ddata, val, LOONGSON_PWM_REG_CTRL);
val = pwm_loongson_readl(ddata, LOONGSON_PWM_REG_CTRL);
pwm_loongson_writel(ddata, val, LOONGSON_PWM_REG_CTRL);
ctrl = pwm_loongson_readl(ddata, LOONGSON_PWM_REG_CTRL);
val = pwm_loongson_readl(ddata, LOONGSON_PWM_REG_CTRL);
pwm_loongson_writel(ddata, val, LOONGSON_PWM_REG_CTRL);