wf_fcu_read_reg
rc = wf_fcu_read_reg(pv, 0xb, &failure, 1);
rc = wf_fcu_read_reg(pv, 0xd, &active, 1);
rc = wf_fcu_read_reg(pv, reg_base + (fan->id * 2), buf, 2);
rc = wf_fcu_read_reg(pv, 0x2b, &failure, 1);
rc = wf_fcu_read_reg(pv, 0x2d, &active, 1);
rc = wf_fcu_read_reg(pv, 0x30 + (fan->id * 2), buf, 1);
rc = wf_fcu_read_reg(pv, 0, &buf, 1);