PTP_CLK_ADJ_ENABLE
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_CLK_ADJ_ENABLE,
PTP_CLK_ADJ_ENABLE);
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_CLK_ADJ_ENABLE, 0);