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