PTP_TWOSTEP_CTRL_STAMP_TX
if (!(val & PTP_TWOSTEP_CTRL_STAMP_TX))
FIELD_PREP(PTP_TWOSTEP_CTRL_STAMP_TX, x)
FIELD_GET(PTP_TWOSTEP_CTRL_STAMP_TX, x)
if (!(val & PTP_TWOSTEP_CTRL_STAMP_TX))
FIELD_PREP(PTP_TWOSTEP_CTRL_STAMP_TX, x)
FIELD_GET(PTP_TWOSTEP_CTRL_STAMP_TX, x)