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