PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ
writel(val | PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ,
writel(val & ~PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ, PRCM_A9_MASK_REQ);