536                 ddi_soft_state_free(pcf8574soft_statep, instance);
 537 
 538                 return (DDI_FAILURE);
 539         }
 540 
 541         err = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip,
 542             DDI_PROP_DONTPASS,
 543             "reg", (int **)&regs, &len);
 544         if (err != DDI_PROP_SUCCESS) {
 545                 return (DDI_FAILURE);
 546         }
 547 
 548         /*
 549          * regs[0] contains the bus number and regs[1] contains the device
 550          * address of the i2c device. 0x7c is the device address of the
 551          * i2c device from which the key switch position is read.
 552          */
 553         if (regs[0] == 0 && regs[1] == 0x7c) {
 554                 abort_seq_handler = littleneck_abort_seq_handler;
 555                 keypoll_timeout_hz =
 556                     drv_usectohz(LNECK_KEY_POLL_INTVL * MICROSEC);
 557                 littleneck_ks_poll(unitp);
 558         }
 559 
 560         ddi_prop_free(regs);
 561 
 562         mutex_init(&unitp->pcf8574_mutex, NULL, MUTEX_DRIVER, NULL);
 563 
 564         return (DDI_SUCCESS);
 565 }
 566 
 567 static int
 568 pcf8574_do_resume()
 569 {
 570         int ret = DDI_SUCCESS;
 571 
 572         return (ret);
 573 }
 574 
 575 static int
 576 pcf8574_do_suspend()

 536                 ddi_soft_state_free(pcf8574soft_statep, instance);
 537 
 538                 return (DDI_FAILURE);
 539         }
 540 
 541         err = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip,
 542             DDI_PROP_DONTPASS,
 543             "reg", (int **)&regs, &len);
 544         if (err != DDI_PROP_SUCCESS) {
 545                 return (DDI_FAILURE);
 546         }
 547 
 548         /*
 549          * regs[0] contains the bus number and regs[1] contains the device
 550          * address of the i2c device. 0x7c is the device address of the
 551          * i2c device from which the key switch position is read.
 552          */
 553         if (regs[0] == 0 && regs[1] == 0x7c) {
 554                 abort_seq_handler = littleneck_abort_seq_handler;
 555                 keypoll_timeout_hz =
 556                     drv_sectohz(LNECK_KEY_POLL_INTVL);
 557                 littleneck_ks_poll(unitp);
 558         }
 559 
 560         ddi_prop_free(regs);
 561 
 562         mutex_init(&unitp->pcf8574_mutex, NULL, MUTEX_DRIVER, NULL);
 563 
 564         return (DDI_SUCCESS);
 565 }
 566 
 567 static int
 568 pcf8574_do_resume()
 569 {
 570         int ret = DDI_SUCCESS;
 571 
 572         return (ret);
 573 }
 574 
 575 static int
 576 pcf8574_do_suspend()