#ifndef _MICREL_H
  
  #define MII_KSZ9021_EXT_COMMON_CTRL		0x100
  #define MII_KSZ9021_EXT_STRAP_STATUS		0x101
  #define MII_KSZ9021_EXT_OP_STRAP_OVERRIDE	0x102
  #define MII_KSZ9021_EXT_OP_STRAP_STATUS		0x103
  #define MII_KSZ9021_EXT_RGMII_CLOCK_SKEW	0x104
  #define MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW	0x105
  #define MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW	0x106
  #define MII_KSZ9021_EXT_ANALOG_TEST		0x107

  /* Register operations */
  #define MII_KSZ9031_MOD_REG			0x0000
  /* Data operations */
  #define MII_KSZ9031_MOD_DATA_NO_POST_INC	0x4000
  #define MII_KSZ9031_MOD_DATA_POST_INC_RW	0x8000
  #define MII_KSZ9031_MOD_DATA_POST_INC_W		0xC000

  #define MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW	0x4
  #define MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW	0x5
  #define MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW	0x6
  #define MII_KSZ9031_EXT_RGMII_CLOCK_SKEW	0x8

  #define MII_KSZ9031_FLP_BURST_TX_LO		0x3
  #define MII_KSZ9031_FLP_BURST_TX_HI		0x4

  /* Registers */
  #define MMD_ACCESS_CONTROL	0xd
  #define MMD_ACCESS_REG_DATA	0xe

  struct phy_device;
  int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val);
  int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum);

  int ksz9031_phy_extended_write(struct phy_device *phydev, int devaddr,
  			       int regnum, u16 mode, u16 val);
  int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr,
  			      int regnum, u16 mode);

  #endif