INT_CTL
smsc9420_reg_write(pd, INT_CTL, 0);
int_ctl = smsc9420_reg_read(pd, INT_CTL) | INT_CTL_SW_INT_EN_;
smsc9420_reg_write(pd, INT_CTL, int_ctl);
int_ctl = smsc9420_reg_read(pd, INT_CTL);
smsc9420_reg_write(pd, INT_CTL, int_ctl);