read_csr_ring_base
bus_addr_t (*read_csr_ring_base)(struct resource *csr_base_addr,
base = csr_ops->read_csr_ring_base(csr_base, bank, i);
if (csr_ops->read_csr_ring_base(csr_base, bank, i))
csr_ops->read_csr_ring_base = read_csr_ring_base;
csr_ops->read_csr_ring_base = read_csr_ring_base;
csr_ops->read_csr_ring_base = read_csr_ring_base;