SCRT2_ETHT
t2_scr = GEM_BFINS(ETHT2IDX, SCRT2_ETHT, t2_scr);
gem_writel_n(bp, ETHT, SCRT2_ETHT, reg);
bp->pm_data.scrt2 = gem_readl_n(bp, ETHT, SCRT2_ETHT);
gem_writel_n(bp, ETHT, SCRT2_ETHT, bp->pm_data.scrt2);