DOVE_MPP_CTRL4_VIRT_BASE
writel(mpp_ctrl4, DOVE_MPP_CTRL4_VIRT_BASE);
u32 mpp_ctrl4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);
writel(mpp_ctrl4, DOVE_MPP_CTRL4_VIRT_BASE);
readl(DOVE_MPP_CTRL4_VIRT_BASE));
u32 mpp_ctrl4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);