MLB_HDMAC_DMACB
writel_relaxed(cb, mc->reg_ch_base + MLB_HDMAC_DMACB);
val = readl_relaxed(mc->reg_ch_base + MLB_HDMAC_DMACB);
writel_relaxed(val, mc->reg_ch_base + MLB_HDMAC_DMACB);
writel_relaxed(val, mc->reg_ch_base + MLB_HDMAC_DMACB);