TIM_CR1_ARPE
regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
regmap_set_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE);
regmap_clear_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE);
regmap_clear_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE);
ret = regmap_set_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE);