copy_to_user_fromio — copy data from mmio-space to user-space
int copy_to_user_fromio
(void __user * dst, const volatile void __iomem * src, size_t count);
the destination pointer on user-space
the source pointer on mmio
the data size to copy in bytes
Copies the data from mmio-space to user-space.
Returns zero if successful, or non-zero on failure.