ETHTOOL_PHYS_ID                             = 0x1c
	ETHTOOL_PHY_EDPD_DFLT_TX_MSECS              = 0xffff
	ETHTOOL_PHY_EDPD_DISABLE                    = 0x0
	ETHTOOL_PHY_EDPD_NO_TX                      = 0xfffe
	ETHTOOL_PHY_FAST_LINK_DOWN_OFF              = 0xff
	ETHTOOL_PHY_FAST_LINK_DOWN_ON               = 0x0
	ETHTOOL_PHY_GTUNABLE                        = 0x4e

		return 0, 0, fmt.Errorf("%d is not a 24 bit unsigned immediate", v)
	}
	if v > 0xfff000+0xfff<<shift {
		return 0, 0, fmt.Errorf("%d is too large for a scaled 24 bit unsigned immediate", v)
	}
	if v&((1<<shift)-1) != 0 {
		return 0, 0, fmt.Errorf("%d is not a multiple of %d", v, 1<<shift)
	}
	lo := (v >> shift) & 0xfff
	hi := v - (lo << shift)
	if hi > 0xfff000 {
		hi = 0xfff000
		lo = (v - hi) >> shift