REG_MSU_MSC0CTL
(ioread32(msc->reg_base + REG_MSU_MSC0CTL) & MSC_LEN) >>
reg = ioread32(msc->reg_base + REG_MSU_MSC0CTL);
iowrite32(reg, msc->reg_base + REG_MSU_MSC0CTL);
reg = ioread32(msc->reg_base + REG_MSU_MSC0CTL);
iowrite32(reg, msc->reg_base + REG_MSU_MSC0CTL);