read_csr_stat
u32 (*read_csr_stat)(void __iomem *csr_base_addr, u32 bank);
ret = check_stat(ops->read_csr_stat, state->ringstat0, "ringstat",
state->ringstat0 = ops->read_csr_stat(base, bank);
csr_ops->read_csr_stat = read_csr_stat;