PTP_CLK_CTRL
[PTP_CLK_CTRL] = 0x0600,
[PTP_CLK_CTRL] = 0x0500,
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_READ_TIME, PTP_READ_TIME);
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_LOAD_TIME, PTP_LOAD_TIME);
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_CLK_ADJ_ENABLE,
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_CLK_ADJ_ENABLE, 0);
ret = ksz_read16(dev, regs[PTP_CLK_CTRL], &data16);
ret = ksz_write16(dev, regs[PTP_CLK_CTRL], data16);
ret = ksz_rmw16(dev, regs[PTP_CLK_CTRL], PTP_CLK_ENABLE, PTP_CLK_ENABLE);