if (hwmgr->fan_ctrl_is_in_default_mode) {
                hwmgr->fan_ctrl_default_mode =
-                               (cgs_read_register(hwmgr->device, reg) &
-                               CG_FDO_CTRL2__FDO_PWM_MODE_MASK) >>
-                               CG_FDO_CTRL2__FDO_PWM_MODE__SHIFT;
-               hwmgr->tmin = (cgs_read_register(hwmgr->device, reg) &
-                               CG_FDO_CTRL2__TMIN_MASK) >>
-                               CG_FDO_CTRL2__TMIN__SHIFT;
+                       CGS_REG_GET_FIELD(cgs_read_register(hwmgr->device, reg),
+                               CG_FDO_CTRL2, FDO_PWM_MODE);
+               hwmgr->tmin =
+                       CGS_REG_GET_FIELD(cgs_read_register(hwmgr->device, reg),
+                               CG_FDO_CTRL2, TMIN);
                hwmgr->fan_ctrl_is_in_default_mode = false;
        }
 
        cgs_write_register(hwmgr->device, reg,
-                       (cgs_read_register(hwmgr->device, reg) &
-                       ~CG_FDO_CTRL2__TMIN_MASK) |
-                       (0 << CG_FDO_CTRL2__TMIN__SHIFT));
+                       CGS_REG_SET_FIELD(cgs_read_register(hwmgr->device, reg),
+                               CG_FDO_CTRL2, TMIN, 0));
        cgs_write_register(hwmgr->device, reg,
-                       (cgs_read_register(hwmgr->device, reg) &
-                       ~CG_FDO_CTRL2__FDO_PWM_MODE_MASK) |
-                       (mode << CG_FDO_CTRL2__FDO_PWM_MODE__SHIFT));
+                       CGS_REG_SET_FIELD(cgs_read_register(hwmgr->device, reg),
+                               CG_FDO_CTRL2, FDO_PWM_MODE, mode));
 
        return 0;
 }