IXGB_EECD_SK
eecd_reg &= ~(IXGB_EECD_SK | IXGB_EECD_DI);
eecd_reg &= ~(IXGB_EECD_CS | IXGB_EECD_SK);
eecd_reg |= IXGB_EECD_SK;
eecd_reg &= ~IXGB_EECD_SK;
eecd_reg |= IXGB_EECD_SK;
eecd_reg &= ~IXGB_EECD_SK;
*eecd_reg = *eecd_reg | IXGB_EECD_SK;
*eecd_reg = *eecd_reg & ~IXGB_EECD_SK;