REG_OFF_CTRL
ctrl = readl(ch->base + REG_OFF_CTRL);
writel(ctrl, ch->base + REG_OFF_CTRL);
ctrl = readl(ch->base + REG_OFF_CTRL);
writel(ctrl, ch->base + REG_OFF_CTRL);
ctrl = readl(ch->base + REG_OFF_CTRL);
writel(ctrl, ch->base + REG_OFF_CTRL);
ctrl = readl(ch->base + REG_OFF_CTRL);
writel(ctrl, ch->base + REG_OFF_CTRL);