TX_BQ_REG_EN
writel_relaxed(BITS_TX_BQ_DEPTH_EN, priv->base + TX_BQ_REG_EN);
writel_relaxed(0, priv->base + TX_BQ_REG_EN);
writel_relaxed(BITS_TX_BQ_START_ADDR_EN, priv->base + TX_BQ_REG_EN);
writel_relaxed(0, priv->base + TX_BQ_REG_EN);