OCS_HCU_OPERATION
writel(OCS_HCU_START, hcu_dev->io_base + OCS_HCU_OPERATION);
writel(OCS_HCU_TERMINATE, hcu_dev->io_base + OCS_HCU_OPERATION);
writel(OCS_HCU_TERMINATE, hcu_dev->io_base + OCS_HCU_OPERATION);
writel(OCS_HCU_START, hcu_dev->io_base + OCS_HCU_OPERATION);
writel(OCS_HCU_TERMINATE, hcu_dev->io_base + OCS_HCU_OPERATION);