int iommu_map_sg(struct device *dev, struct iommu_table *tbl,
		 struct scatterlist *sglist, int nelems,
		 unsigned long mask, enum dma_data_direction direction,
		 struct dma_attrs *attrs)
{
	dma_addr_t dma_next = 0, dma_addr;
	unsigned long flags;
	struct scatterlist *s, *outs, *segstart;
	int outcount, incount, i, build_fail = 0;
	unsigned int align;
	unsigned long handle;
	unsigned int max_seg_size;

	BUG_ON(direction == DMA_NONE);

	if ((nelems == 0) || !tbl)
		return 0;

	outs = s = segstart = &sglist[0];
	outcount = 1;
	incount = nelems;
	handle = 0;

	/* Init first segment length for backout at failure */
	outs->dma_length = 0;

	DBG("sg mapping %d elements:\n", nelems);

	spin_lock_irqsave(&(tbl->it_lock), flags);

	max_seg_size = dma_get_max_seg_size(dev);
	for_each_sg(sglist, s, nelems, i) {
		unsigned long vaddr, npages, entry, slen;

		slen = s->length;
		/* Sanity check */
		if (slen == 0) {
			dma_next = 0;
			continue;
		}
		/* Allocate iommu entries for that segment */
		vaddr = (unsigned long) sg_virt(s);
		npages = iommu_num_pages(vaddr, slen, IOMMU_PAGE_SIZE);
		align = 0;
		if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && slen >= PAGE_SIZE &&
		    (vaddr & ~PAGE_MASK) == 0)
			align = PAGE_SHIFT - IOMMU_PAGE_SHIFT;
		entry = iommu_range_alloc(dev, tbl, npages, &handle,
					  mask >> IOMMU_PAGE_SHIFT, align);

		DBG("  - vaddr: %lx, size: %lx\n", vaddr, slen);

		/* Handle failure */
		if (unlikely(entry == DMA_ERROR_CODE)) {
			if (printk_ratelimit())
				dev_info(dev, "iommu_alloc failed, tbl %p "
					 "vaddr %lx npages %lu\n", tbl, vaddr,
					 npages);
			goto failure;
		}

		/* Convert entry to a dma_addr_t */
		entry += tbl->it_offset;
		dma_addr = entry << IOMMU_PAGE_SHIFT;
		dma_addr |= (s->offset & ~IOMMU_PAGE_MASK);

		DBG("  - %lu pages, entry: %lx, dma_addr: %lx\n",
			    npages, entry, dma_addr);

		/* Insert into HW table */
		build_fail = ppc_md.tce_build(tbl, entry, npages,
		                              vaddr & IOMMU_PAGE_MASK,
		                              direction, attrs);
		if(unlikely(build_fail))
			goto failure;

		/* If we are in an open segment, try merging */
		if (segstart != s) {
			DBG("  - trying merge...\n");
			/* We cannot merge if:
			 * - allocated dma_addr isn't contiguous to previous allocation
			 */
			if (novmerge || (dma_addr != dma_next) ||
			    (outs->dma_length + s->length > max_seg_size)) {
				/* Can't merge: create a new segment */
				segstart = s;
				outcount++;
				outs = sg_next(outs);
				DBG("    can't merge, new segment.\n");
			} else {
				outs->dma_length += s->length;
				DBG("    merged, new len: %ux\n", outs->dma_length);
			}
		}

		if (segstart == s) {
			/* This is a new segment, fill entries */
			DBG("  - filling new segment.\n");
			outs->dma_address = dma_addr;
			outs->dma_length = slen;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	  (endpoint->bEndpointAddress & USB_DIR_IN) &&
	  ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) )
	{
	  /* we found a bulk in endpoint */
	  buffer_size = endpoint->wMaxPacketSize;
	  dev->bulk_in_size = buffer_size;      
	  dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
	  dev->read_urb = usb_alloc_urb(0, GFP_ATOMIC);
	  if( dev->read_urb == NULL )
	    {
	      printk("No free urbs available");
	      goto error;
	    }
	  dev->read_urb->transfer_flags = (URB_NO_TRANSFER_DMA_MAP);
	  
  dev->bulk_in_buffer = usb_alloc_coherent (udev,
						  buffer_size, GFP_ATOMIC,
						  &dev->read_urb->transfer_dma);
	  if( dev->bulk_in_buffer == NULL )
	    {
	      printk("Couldn't allocate bulk_in_buffer");
	      goto error;
	    }
	  usb_fill_bulk_urb(dev->read_urb, udev,
			    usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
			    dev->bulk_in_buffer, buffer_size,
			    (usb_complete_t)cypress_read_bulk_callback, dev);
	}

      if( !dev->bulk_out_endpointAddr &&
	  !(endpoint->bEndpointAddress & USB_DIR_IN) &&
	  ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) )
	{
	  /* we found a bulk out endpoint */
	  /* a probe() may sleep and has no restrictions on memory allocations */
	  dev->write_urb = usb_alloc_urb(0, GFP_ATOMIC);
	  if( dev->write_urb == NULL )
	    {
	      printk("No free urbs available");
	      goto error;
	    }
	  dev->bulk_out_endpointAddr = endpoint->bEndpointAddress;

	  /* on some platforms using this kind of buffer alloc
	   * call eliminates a dma "bounce buffer".
	   *
	   * NOTE: you'd normally want i/o buffers that hold
	   * more than one packet, so that i/o delays between
	   * packets don't hurt throughput.
	   */
	  buffer_size = endpoint->wMaxPacketSize;
	  dev->bulk_out_size = buffer_size;
	  dev->write_urb->transfer_flags = (URB_NO_TRANSFER_DMA_MAP);
	  dev->bulk_out_buffer = usb_alloc_coherent (udev,
						   buffer_size, GFP_ATOMIC,
						   &dev->write_urb->transfer_dma);
	  if( dev->bulk_out_buffer == NULL )
	    {
	      printk("Couldn't allocate bulk_out_buffer");
	      goto error;
	    }
	  usb_fill_bulk_urb(dev->write_urb, udev,
			    usb_sndbulkpipe(udev,
					    endpoint->bEndpointAddress),
			    dev->bulk_out_buffer, buffer_size,
			    (usb_complete_t)cypress_write_bulk_callback, dev);
	}
    }
  if (!(dev->bulk_in_endpointAddr && dev->bulk_out_endpointAddr))
    {
      printk("Couldn't find both bulk-in and bulk-out endpoints");
      goto error;
    }

  dev->present = 1;                   /* allow device read, write and ioctl */
  usb_set_intfdata (interface, dev);  /* we can register the device now, as it is ready */
  spin_lock_init(&(dev->lock));       /* initialize spinlock to unlocked (new kerenel method) */

  /* HK: Begin- connect filesystem hooks */
  /* we can register the device now, as it is ready */
  retval = usb_register_dev(interface, &cypress_class);
  if (retval) {
    /* something prevented us from registering this driver */
    printk("Not able to get a minor for this device.");
    usb_set_intfdata(interface, NULL);
    goto error;
  }
  dev_info(&interface->dev,
	   "BRL USB device now attached to minor: %d\n",
	   interface->minor);                            /* let the user know the device minor */
  dev->read_task = NULL;                                 /* Initialize fs read_task. */
  
  addNode(dev);
  return 0;

 error: // please please please remove goto statements!    HK:Why?
  printk("cypress_probe: error occured!\n");
  cypress_delete (dev);
  return retval;
}

/*
 * Receive flow control
 * Return 1 - If ok, else 0
 */
static int receive_flow_control(struct nozomi *dc)
{
	enum port_type port = PORT_MDM;
	struct ctrl_dl ctrl_dl;
	struct ctrl_dl old_ctrl;
	u16 enable_ier = 0;

	read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);

	switch (ctrl_dl.port) {
	case CTRL_CMD:
		DBG1("The Base Band sends this value as a response to a "
			"request for IMSI detach sent over the control "
			"channel uplink (see section 7.6.1).");
		break;
	case CTRL_MDM:
		port = PORT_MDM;
		enable_ier = MDM_DL;
		break;
	case CTRL_DIAG:
		port = PORT_DIAG;
		enable_ier = DIAG_DL;
		break;
	case CTRL_APP1:
		port = PORT_APP1;
		enable_ier = APP1_DL;
		break;
	case CTRL_APP2:
		port = PORT_APP2;
		enable_ier = APP2_DL;
		if (dc->state == NOZOMI_STATE_ALLOCATED) {
			/*
			 * After card initialization the flow control
			 * received for APP2 is always the last
			 */
			dc->state = NOZOMI_STATE_READY;
			dev_info(&dc->pdev->dev, "Device READY!\n");
		}
		break;
	default:
		dev_err(&dc->pdev->dev,
			"ERROR: flow control received for non-existing port\n");
		return 0;
	}

	DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
	   *((u16 *)&ctrl_dl));

	old_ctrl = dc->port[port].ctrl_dl;
	dc->port[port].ctrl_dl = ctrl_dl;

	if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
		DBG1("Disable interrupt (0x%04X) on port: %d",
			enable_ier, port);
		disable_transmit_ul(port, dc);

	} else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {

		if (kfifo_len(&dc->port[port].fifo_ul)) {
			DBG1("Enable interrupt (0x%04X) on port: %d",
				enable_ier, port);
			DBG1("Data in buffer [%d], enable transmit! ",
				kfifo_len(&dc->port[port].fifo_ul));
			enable_transmit_ul(port, dc);
		} else {
			DBG1("No data in buffer...");
		}
	}

	if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
		DBG1(" No change in mctrl");
		return 1;
	}
	/* Update statistics */
	if (old_ctrl.CTS != ctrl_dl.CTS)
		dc->port[port].tty_icount.cts++;
	if (old_ctrl.DSR != ctrl_dl.DSR)
		dc->port[port].tty_icount.dsr++;
	if (old_ctrl.RI != ctrl_dl.RI)
		dc->port[port].tty_icount.rng++;
	if (old_ctrl.DCD != ctrl_dl.DCD)
		dc->port[port].tty_icount.dcd++;

	wake_up_interruptible(&dc->port[port].tty_wait);

	DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
	   port,
	   dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
	   dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);

	return 1;
}

int dvb_usbv2_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
{
	int ret;
	struct dvb_usb_device *d;
	struct usb_device *udev = interface_to_usbdev(intf);
	struct dvb_usb_driver_info *driver_info =
			(struct dvb_usb_driver_info *) id->driver_info;

	dev_dbg(&udev->dev, "%s: bInterfaceNumber=%d\n", __func__,
			intf->cur_altsetting->desc.bInterfaceNumber);

	if (!id->driver_info) {
		dev_err(&udev->dev, "%s: driver_info failed\n", KBUILD_MODNAME);
		ret = -ENODEV;
		goto err;
	}

	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
	if (!d) {
		dev_err(&udev->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
		ret = -ENOMEM;
		goto err;
	}

	d->name = driver_info->name;
	d->rc_map = driver_info->rc_map;
	d->udev = udev;
	d->props = driver_info->props;

	if (intf->cur_altsetting->desc.bInterfaceNumber !=
			d->props->bInterfaceNumber) {
		ret = -ENODEV;
		goto err_free_all;
	}

	mutex_init(&d->usb_mutex);
	mutex_init(&d->i2c_mutex);

	if (d->props->size_of_priv) {
		d->priv = kzalloc(d->props->size_of_priv, GFP_KERNEL);
		if (!d->priv) {
			dev_err(&d->udev->dev, "%s: kzalloc() failed\n",
					KBUILD_MODNAME);
			ret = -ENOMEM;
			goto err_free_all;
		}
	}

	if (d->props->identify_state) {
		const char *name = NULL;
		ret = d->props->identify_state(d, &name);
		if (ret == 0) {
			;
		} else if (ret == COLD) {
			dev_info(&d->udev->dev,
					"%s: found a '%s' in cold state\n",
					KBUILD_MODNAME, d->name);

			if (!name)
				name = d->props->firmware;

			ret = dvb_usbv2_download_firmware(d, name);
			if (ret == 0) {
				/* device is warm, continue initialization */
				;
			} else if (ret == RECONNECTS_USB) {
				/*
				 * USB core will call disconnect() and then
				 * probe() as device reconnects itself from the
				 * USB bus. disconnect() will release all driver
				 * resources and probe() is called for 'new'
				 * device. As 'new' device is warm we should
				 * never go here again.
				 */
				goto exit;
			} else {
				goto err_free_all;
			}
		} else {
			goto err_free_all;
		}
	}

	dev_info(&d->udev->dev, "%s: found a '%s' in warm state\n",
			KBUILD_MODNAME, d->name);

	ret = dvb_usbv2_init(d);
	if (ret < 0)
		goto err_free_all;

	dev_info(&d->udev->dev,
			"%s: '%s' successfully initialized and connected\n",
			KBUILD_MODNAME, d->name);
exit:
	usb_set_intfdata(intf, d);

	return 0;
err_free_all:
	dvb_usbv2_exit(d);
//.........这里部分代码省略.........

static int __devinit pil_modem_driver_probe(struct platform_device *pdev)
{
	struct modem_data *drv;
	struct resource *res;
	struct pil_desc *desc;
	int ret;

	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
	if (!drv)
		return -ENOMEM;
	platform_set_drvdata(pdev, drv);

	drv->irq = platform_get_irq(pdev, 0);
	if (drv->irq < 0)
		return drv->irq;

	drv->xo = devm_clk_get(&pdev->dev, "xo");
	if (IS_ERR(drv->xo))
		return PTR_ERR(drv->xo);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	drv->base = devm_request_and_ioremap(&pdev->dev, res);
	if (!drv->base)
		return -ENOMEM;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	drv->wdog = devm_request_and_ioremap(&pdev->dev, res);
	if (!drv->wdog)
		return -ENOMEM;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
	if (!res)
		return -EINVAL;

	drv->cbase = devm_ioremap(&pdev->dev, res->start, resource_size(res));
	if (!drv->cbase)
		return -ENOMEM;

	desc = &drv->pil_desc;
	desc->name = "modem";
	desc->dev = &pdev->dev;
	desc->owner = THIS_MODULE;
	desc->proxy_timeout = 10000;

	if (pas_supported(PAS_MODEM) > 0) {
		desc->ops = &pil_modem_ops_trusted;
		dev_info(&pdev->dev, "using secure boot\n");
	} else {
		desc->ops = &pil_modem_ops;
		dev_info(&pdev->dev, "using non-secure boot\n");
	}
	ret = pil_desc_init(desc);
	if (ret)
		return ret;

	drv->notifier.notifier_call = modem_notif_handler,
	ret = modem_register_notifier(&drv->notifier);
	if (ret)
		goto err_notify;

	drv->subsys_desc.name = "modem";
	drv->subsys_desc.depends_on = "adsp";
	drv->subsys_desc.dev = &pdev->dev;
	drv->subsys_desc.owner = THIS_MODULE;
	drv->subsys_desc.start = modem_start;
	drv->subsys_desc.stop = modem_stop;
	drv->subsys_desc.shutdown = modem_shutdown;
	drv->subsys_desc.powerup = modem_powerup;
	drv->subsys_desc.ramdump = modem_ramdump;
	drv->subsys_desc.crash_shutdown = modem_crash_shutdown;

	INIT_WORK(&drv->fatal_work, modem_fatal_fn);
	INIT_DELAYED_WORK(&drv->unlock_work, modem_unlock_timeout);

	drv->subsys = subsys_register(&drv->subsys_desc);
	if (IS_ERR(drv->subsys)) {
		ret = PTR_ERR(drv->subsys);
		goto err_subsys;
	}

	drv->ramdump_dev = create_ramdump_device("modem", &pdev->dev);
	if (!drv->ramdump_dev) {
		ret = -ENOMEM;
		goto err_ramdump;
	}

	ret = devm_request_irq(&pdev->dev, drv->irq, modem_wdog_bite_irq,
			IRQF_TRIGGER_RISING, "modem_watchdog", drv);
	if (ret)
		goto err_irq;
	return 0;

err_irq:
	destroy_ramdump_device(drv->ramdump_dev);
err_ramdump:
	subsys_unregister(drv->subsys);
err_subsys:
	modem_unregister_notifier(&drv->notifier);
err_notify:
	pil_desc_release(desc);
//.........这里部分代码省略.........

static int dvb_usbv2_adapter_dvb_init(struct dvb_usb_adapter *adap)
{
	int ret;
	struct dvb_usb_device *d = adap_to_d(adap);
	dev_dbg(&d->udev->dev, "%s: adap=%d\n", __func__, adap->id);

	ret = dvb_register_adapter(&adap->dvb_adap, d->name, d->props->owner,
			&d->udev->dev, d->props->adapter_nr);
	if (ret < 0) {
		dev_dbg(&d->udev->dev, "%s: dvb_register_adapter() failed=%d\n",
				__func__, ret);
		goto err_dvb_register_adapter;
	}

	adap->dvb_adap.priv = adap;

	if (d->props->read_mac_address) {
		ret = d->props->read_mac_address(adap,
				adap->dvb_adap.proposed_mac);
		if (ret < 0)
			goto err_dvb_dmx_init;

		dev_info(&d->udev->dev, "%s: MAC address: %pM\n",
				KBUILD_MODNAME, adap->dvb_adap.proposed_mac);
	}

	adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
	adap->demux.priv             = adap;
	adap->demux.filternum        = 0;
	adap->demux.filternum        = adap->max_feed_count;
	adap->demux.feednum          = adap->demux.filternum;
	adap->demux.start_feed       = dvb_usb_start_feed;
	adap->demux.stop_feed        = dvb_usb_stop_feed;
	adap->demux.write_to_decoder = NULL;
	ret = dvb_dmx_init(&adap->demux);
	if (ret < 0) {
		dev_err(&d->udev->dev, "%s: dvb_dmx_init() failed=%d\n",
				KBUILD_MODNAME, ret);
		goto err_dvb_dmx_init;
	}

	adap->dmxdev.filternum       = adap->demux.filternum;
	adap->dmxdev.demux           = &adap->demux.dmx;
	adap->dmxdev.capabilities    = 0;
	ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
	if (ret < 0) {
		dev_err(&d->udev->dev, "%s: dvb_dmxdev_init() failed=%d\n",
				KBUILD_MODNAME, ret);
		goto err_dvb_dmxdev_init;
	}

	ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
	if (ret < 0) {
		dev_err(&d->udev->dev, "%s: dvb_net_init() failed=%d\n",
				KBUILD_MODNAME, ret);
		goto err_dvb_net_init;
	}

	return 0;
err_dvb_net_init:
	dvb_dmxdev_release(&adap->dmxdev);
err_dvb_dmxdev_init:
	dvb_dmx_release(&adap->demux);
err_dvb_dmx_init:
	dvb_unregister_adapter(&adap->dvb_adap);
err_dvb_register_adapter:
	adap->dvb_adap.priv = NULL;
	return ret;
}

static int sh_pfc_probe(struct platform_device *pdev)
{
	const struct platform_device_id *platid = platform_get_device_id(pdev);
#ifdef CONFIG_OF
	struct device_node *np = pdev->dev.of_node;
#endif
	const struct sh_pfc_soc_info *info;
	struct sh_pfc *pfc;
	int ret;

#ifdef CONFIG_OF
	if (np)
		info = of_device_get_match_data(&pdev->dev);
	else
#endif
		info = platid ? (const void *)platid->driver_data : NULL;

	if (info == NULL)
		return -ENODEV;

	pfc = devm_kzalloc(&pdev->dev, sizeof(*pfc), GFP_KERNEL);
	if (pfc == NULL)
		return -ENOMEM;

	pfc->info = info;
	pfc->dev = &pdev->dev;

	ret = sh_pfc_map_resources(pfc, pdev);
	if (unlikely(ret < 0))
		return ret;

	spin_lock_init(&pfc->lock);

	if (info->ops && info->ops->init) {
		ret = info->ops->init(pfc);
		if (ret < 0)
			return ret;
	}

	pinctrl_provide_dummies();

	ret = sh_pfc_init_ranges(pfc);
	if (ret < 0)
		return ret;

	/*
	 * Initialize pinctrl bindings first
	 */
	ret = sh_pfc_register_pinctrl(pfc);
	if (unlikely(ret != 0))
		return ret;

#ifdef CONFIG_PINCTRL_SH_PFC_GPIO
	/*
	 * Then the GPIO chip
	 */
	ret = sh_pfc_register_gpiochip(pfc);
	if (unlikely(ret != 0)) {
		/*
		 * If the GPIO chip fails to come up we still leave the
		 * PFC state as it is, given that there are already
		 * extant users of it that have succeeded by this point.
		 */
		dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n");
	}
#endif

	platform_set_drvdata(pdev, pfc);

	dev_info(pfc->dev, "%s support registered\n", info->name);

	return 0;
}

static int tegra_camera_probe(struct platform_device *pdev)
{
	int err;
	struct tegra_camera_dev *dev;

	dev_info(&pdev->dev, "%s\n", __func__);
	dev = devm_kzalloc(&pdev->dev, sizeof(struct tegra_camera_dev),
			GFP_KERNEL);
	if (!dev) {
		err = -ENOMEM;
		dev_err(&pdev->dev, "%s: unable to allocate memory\n",
			__func__);
		goto alloc_err;
	}

#if defined(CONFIG_ARCH_ACER_T20)
	t20_dev = dev;
#elif defined(CONFIG_ARCH_ACER_T30)
	t30_dev = dev;
#endif

	mutex_init(&dev->tegra_camera_lock);

	/* Powergate VE when boot */
	mutex_lock(&dev->tegra_camera_lock);
	dev->power_refcnt = 0;
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	err = tegra_powergate_partition(TEGRA_POWERGATE_VENC);
	if (err)
		dev_err(&pdev->dev, "%s: powergate failed.\n", __func__);
#endif
	mutex_unlock(&dev->tegra_camera_lock);

	dev->dev = &pdev->dev;

	/* Get regulator pointer */
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
	dev->reg = regulator_get(&pdev->dev, "vcsi");
#else
	dev->reg = regulator_get(&pdev->dev, "avdd_dsi_csi");
#endif
	if (IS_ERR_OR_NULL(dev->reg)) {
		dev_err(&pdev->dev, "%s: couldn't get regulator\n", __func__);
		return PTR_ERR(dev->reg);
	}

	dev->misc_dev.minor = MISC_DYNAMIC_MINOR;
	dev->misc_dev.name = TEGRA_CAMERA_NAME;
	dev->misc_dev.fops = &tegra_camera_fops;
	dev->misc_dev.parent = &pdev->dev;

	err = misc_register(&dev->misc_dev);
	if (err) {
		dev_err(&pdev->dev, "%s: Unable to register misc device!\n",
		       TEGRA_CAMERA_NAME);
		goto misc_register_err;
	}

	err = tegra_camera_clk_get(pdev, "isp", &dev->isp_clk);
	if (err)
		goto misc_register_err;
	err = tegra_camera_clk_get(pdev, "vi", &dev->vi_clk);
	if (err)
		goto vi_clk_get_err;
	err = tegra_camera_clk_get(pdev, "vi_sensor", &dev->vi_sensor_clk);
	if (err)
		goto vi_sensor_clk_get_err;
	err = tegra_camera_clk_get(pdev, "csus", &dev->csus_clk);
	if (err)
		goto csus_clk_get_err;
	err = tegra_camera_clk_get(pdev, "csi", &dev->csi_clk);
	if (err)
		goto csi_clk_get_err;

	/* dev is set in order to restore in _remove */
	platform_set_drvdata(pdev, dev);

	return 0;

csi_clk_get_err:
	clk_put(dev->csus_clk);
csus_clk_get_err:
	clk_put(dev->vi_sensor_clk);
vi_sensor_clk_get_err:
	clk_put(dev->vi_clk);
vi_clk_get_err:
	clk_put(dev->isp_clk);
misc_register_err:
	regulator_put(dev->reg);
alloc_err:
	return err;
}

int da9052_i2c_read_many(struct da9052 *da9052,
	struct da9052_ssc_msg *sscmsg, int msg_no)
{

	struct i2c_msg i2cmsg;
	unsigned char data_buf[MAX_READ_WRITE_CNT];
	struct da9052_ssc_msg *msg_queue = sscmsg;
	int ret = 0;
	/* Flag to check if requested registers are contiguous */
	unsigned char cont_data = 1;
	unsigned char cnt = 0;

	/* Check if requested registers are contiguous */
	for (cnt = 1; cnt < msg_no; cnt++) {
		if ((msg_queue[cnt].addr - msg_queue[cnt-1].addr) != 1) {
			/* Difference is not 1, i.e. non-contiguous registers */
			cont_data = 0;
			break;
		}
	}

	if (cont_data == 0) {
		/* Requested registers are non-contiguous */
		for (cnt = 0; cnt < msg_no; cnt++) {
			ret = da9052->read(da9052, &msg_queue[cnt]);
			if (ret != 0) {
				dev_info(&da9052->i2c_client->dev,\
				"Error in %s", __func__);
				return ret;
			}
		}
		return 0;
	}

	/*
	* We want to perform PAGE READ via I2C
	* For PAGE READ sequence of I2C transactions is as below
	* (slave_addr + reg_addr) + (slave_addr + data_1 + data_2 + ...)
	*/
	/* Copy address of first register */
	data_buf[0] = msg_queue[0].addr;

	/* Construct a i2c msg for first transaction of PAGE READ i.e. write */
	i2cmsg.addr  = da9052->slave_addr ;
	i2cmsg.len   = 1;
	i2cmsg.buf   = data_buf;

	/*To write the data on I2C set flag to zero */
	i2cmsg.flags = 0;

	/* Start the i2c transfer by calling host i2c driver function */
	ret = i2c_transfer(da9052->adapter, &i2cmsg, 1);
	if (ret < 0) {
		dev_info(&da9052->i2c_client->dev,\
		"1 - i2c_transfer function falied in [%s]!!!\n", __func__);
		return ret;
	}

	/* Now Read the data from da9052 */
	/* Construct a i2c msg for second transaction of PAGE READ i.e. read */
	i2cmsg.addr  = da9052->slave_addr ;
	i2cmsg.len   = msg_no;
	i2cmsg.buf   = data_buf;

	/*To read the data on I2C set flag to I2C_M_RD */
	i2cmsg.flags = I2C_M_RD;

	/* Start the i2c transfer by calling host i2c driver function */
	ret = i2c_transfer(da9052->adapter,
		&i2cmsg, 1);
	if (ret < 0) {
		dev_info(&da9052->i2c_client->dev,\
		"2 - i2c_transfer function falied in [%s]!!!\n", __func__);
		return ret;
	}

	/* Gather READ data */
	for (cnt = 0; cnt < msg_no; cnt++)
		sscmsg[cnt].data = data_buf[cnt];

	return 0;
}

int da9052_i2c_write_many(struct da9052 *da9052,
	struct da9052_ssc_msg *sscmsg, int msg_no)
{

	struct i2c_msg i2cmsg;
	unsigned char data_buf[MAX_READ_WRITE_CNT+1];
	struct da9052_ssc_msg ctrlb_msg;
	struct da9052_ssc_msg *msg_queue = sscmsg;
	int ret = 0;
	/* Flag to check if requested registers are contiguous */
	unsigned char cont_data = 1;
	unsigned char cnt = 0;

	/* Check if requested registers are contiguous */
	for (cnt = 1; cnt < msg_no; cnt++) {
		if ((msg_queue[cnt].addr - msg_queue[cnt-1].addr) != 1) {
			/* Difference is not 1, i.e. non-contiguous registers */
			cont_data = 0;
			break;
		}
	}

	if (cont_data == 0) {
		/* Requested registers are non-contiguous */
		for (cnt = 0; cnt < msg_no; cnt++) {
			ret = da9052->write(da9052, &msg_queue[cnt]);
			if (ret != 0)
				return ret;
		}
		return 0;
	}
	/*
	*  Requested registers are contiguous
	* or PAGE WRITE sequence of I2C transactions is as below
	* (slave_addr + reg_addr + data_1 + data_2 + ...)
	* First read current WRITE MODE via CONTROL_B register of DA9052
	*/
	ctrlb_msg.addr = DA9052_CONTROLB_REG;
	ctrlb_msg.data = 0x0;
	ret = da9052->read(da9052, &ctrlb_msg);

	if (ret != 0)
		return ret;

	/* Check if PAGE WRITE mode is set */
	if (ctrlb_msg.data & DA9052_CONTROLB_WRITEMODE) {
		/* REPEAT WRITE mode is configured */
		/* Now set DA9052 into PAGE WRITE mode */
		ctrlb_msg.data &= ~DA9052_CONTROLB_WRITEMODE;
		ret = da9052->write(da9052, &ctrlb_msg);

		if (ret != 0)
			return ret;
	}

	 /* Put first register address */
	data_buf[0] = msg_queue[0].addr;

	for (cnt = 0; cnt < msg_no; cnt++)
		data_buf[cnt+1] = msg_queue[cnt].data;

	/* Construct a i2c msg for PAGE WRITE */
	i2cmsg.addr  = da9052->slave_addr ;
	/* First register address + all data*/
	i2cmsg.len   = (msg_no + 1);
	i2cmsg.buf   = data_buf;

	/*To write the data on I2C set flag to zero */
	i2cmsg.flags = 0;

	/* Start the i2c transfer by calling host i2c driver function */
	ret = i2c_transfer(da9052->adapter, &i2cmsg, 1);
	if (ret < 0) {
		dev_info(&da9052->i2c_client->dev,\
		"1 - i2c_transfer function falied in [%s]!!!\n", __func__);
		return ret;
	}

	return 0;
}

void vnt_run_command(struct work_struct *work)
{
	struct vnt_private *priv =
		container_of(work, struct vnt_private, run_command_work.work);

	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
		return;

	if (priv->cmd_running != true)
		return;

	switch (priv->command_state) {
	case WLAN_CMD_INIT_MAC80211_START:
		if (priv->mac_hw)
			break;

		dev_info(&priv->usb->dev, "Starting mac80211\n");

		if (vnt_init(priv)) {
			/* If fail all ends TODO retry */
			dev_err(&priv->usb->dev, "failed to start\n");
			ieee80211_free_hw(priv->hw);
			return;
		}

		break;

	case WLAN_CMD_TBTT_WAKEUP_START:
		vnt_next_tbtt_wakeup(priv);
		break;

	case WLAN_CMD_BECON_SEND_START:
		if (!priv->vif)
			break;

		vnt_beacon_make(priv, priv->vif);

		vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);

		break;

	case WLAN_CMD_SETPOWER_START:

		vnt_rf_setpower(priv, priv->current_rate,
				priv->hw->conf.chandef.chan->hw_value);

		break;

	case WLAN_CMD_CHANGE_ANTENNA_START:
		dev_dbg(&priv->usb->dev, "Change from Antenna%d to",
							priv->rx_antenna_sel);

		if (priv->rx_antenna_sel == 0) {
			priv->rx_antenna_sel = 1;
			if (priv->tx_rx_ant_inv == true)
				vnt_set_antenna_mode(priv, ANT_RXA);
			else
				vnt_set_antenna_mode(priv, ANT_RXB);
		} else {
			priv->rx_antenna_sel = 0;
			if (priv->tx_rx_ant_inv == true)
				vnt_set_antenna_mode(priv, ANT_RXB);
			else
				vnt_set_antenna_mode(priv, ANT_RXA);
		}
		break;

	default:
		break;
	}

	vnt_cmd_complete(priv);
}

//.........这里部分代码省略.........
	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (dev == NULL) {
		dev_err(&intf->dev, "Out of memory\n");
		goto exit;
	}
	mutex_init(&dev->mutex);
	spin_lock_init(&dev->rbsl);
	dev->intf = intf;
	init_waitqueue_head(&dev->read_wait);
	init_waitqueue_head(&dev->write_wait);

	/* workaround for early firmware versions on fast computers */
	if ((le16_to_cpu(udev->descriptor.idVendor) == USB_VENDOR_ID_LD) &&
	    ((le16_to_cpu(udev->descriptor.idProduct) == USB_DEVICE_ID_LD_CASSY) ||
	     (le16_to_cpu(udev->descriptor.idProduct) == USB_DEVICE_ID_LD_COM3LAB)) &&
	    (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x103)) {
		buffer = kmalloc(256, GFP_KERNEL);
		if (buffer == NULL) {
			dev_err(&intf->dev, "Couldn't allocate string buffer\n");
			goto error;
		}
		/* usb_string makes SETUP+STALL to leave always ControlReadLoop */
		usb_string(udev, 255, buffer, 256);
		kfree(buffer);
	}

	iface_desc = intf->cur_altsetting;

	/* set up the endpoint information */
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;

		if (usb_endpoint_is_int_in(endpoint))
			dev->interrupt_in_endpoint = endpoint;

		if (usb_endpoint_is_int_out(endpoint))
			dev->interrupt_out_endpoint = endpoint;
	}
	if (dev->interrupt_in_endpoint == NULL) {
		dev_err(&intf->dev, "Interrupt in endpoint not found\n");
		goto error;
	}
	if (dev->interrupt_out_endpoint == NULL)
		dev_warn(&intf->dev, "Interrupt out endpoint not found (using control endpoint instead)\n");

	dev->interrupt_in_endpoint_size = usb_endpoint_maxp(dev->interrupt_in_endpoint);
	dev->ring_buffer = kmalloc(ring_buffer_size*(sizeof(size_t)+dev->interrupt_in_endpoint_size), GFP_KERNEL);
	if (!dev->ring_buffer) {
		dev_err(&intf->dev, "Couldn't allocate ring_buffer\n");
		goto error;
	}
	dev->interrupt_in_buffer = kmalloc(dev->interrupt_in_endpoint_size, GFP_KERNEL);
	if (!dev->interrupt_in_buffer) {
		dev_err(&intf->dev, "Couldn't allocate interrupt_in_buffer\n");
		goto error;
	}
	dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!dev->interrupt_in_urb) {
		dev_err(&intf->dev, "Couldn't allocate interrupt_in_urb\n");
		goto error;
	}
	dev->interrupt_out_endpoint_size = dev->interrupt_out_endpoint ? usb_endpoint_maxp(dev->interrupt_out_endpoint) :
									 udev->descriptor.bMaxPacketSize0;
	dev->interrupt_out_buffer = kmalloc(write_buffer_size*dev->interrupt_out_endpoint_size, GFP_KERNEL);
	if (!dev->interrupt_out_buffer) {
		dev_err(&intf->dev, "Couldn't allocate interrupt_out_buffer\n");
		goto error;
	}
	dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!dev->interrupt_out_urb) {
		dev_err(&intf->dev, "Couldn't allocate interrupt_out_urb\n");
		goto error;
	}
	dev->interrupt_in_interval = min_interrupt_in_interval > dev->interrupt_in_endpoint->bInterval ? min_interrupt_in_interval : dev->interrupt_in_endpoint->bInterval;
	if (dev->interrupt_out_endpoint)
		dev->interrupt_out_interval = min_interrupt_out_interval > dev->interrupt_out_endpoint->bInterval ? min_interrupt_out_interval : dev->interrupt_out_endpoint->bInterval;

	/* we can register the device now, as it is ready */
	usb_set_intfdata(intf, dev);

	retval = usb_register_dev(intf, &ld_usb_class);
	if (retval) {
		/* something prevented us from registering this driver */
		dev_err(&intf->dev, "Not able to get a minor for this device.\n");
		usb_set_intfdata(intf, NULL);
		goto error;
	}

	/* let the user know what node this device is now attached to */
	dev_info(&intf->dev, "LD USB Device #%d now attached to major %d minor %d\n",
		(intf->minor - USB_LD_MINOR_BASE), USB_MAJOR, intf->minor);

exit:
	return retval;

error:
	ld_usb_delete(dev);

	return retval;
}

static int
msm_i2c_recover_bus_busy(struct msm_i2c_dev *dev)
{
	int i;
	uint32_t status = readl(dev->base + I2C_STATUS);
	int gpio_clk, gpio_dat;
	bool gpio_clk_status = false;

	if (!(status & (I2C_STATUS_BUS_ACTIVE | I2C_STATUS_WR_BUFFER_FULL)))
		return 0;

	msm_set_i2c_mux(true, &gpio_clk, &gpio_dat, 0, 0);

	if (status & I2C_STATUS_RD_BUFFER_FULL) {
		dev_warn(dev->dev, "Read buffer full, status %x, intf %x\n",
			 status, readl(dev->base + I2C_INTERFACE_SELECT));
		writel(I2C_WRITE_DATA_LAST_BYTE, dev->base + I2C_WRITE_DATA);
		readl(dev->base + I2C_READ_DATA);
	}
	else if (status & I2C_STATUS_BUS_MASTER) {
		dev_warn(dev->dev, "Still the bus master, status %x, intf %x\n",
			 status, readl(dev->base + I2C_INTERFACE_SELECT));
		writel(I2C_WRITE_DATA_LAST_BYTE | 0xff,
		       dev->base + I2C_WRITE_DATA);
	}

	dev_warn(dev->dev, "i2c_scl: %d, i2c_sda: %d\n",
		 gpio_get_value(gpio_clk), gpio_get_value(gpio_dat));

	for (i = 0; i < 9; i++) {
		if (gpio_get_value(gpio_dat) && gpio_clk_status)
			break;
		gpio_direction_output(gpio_clk, 0);
		udelay(5);
		gpio_direction_output(gpio_dat, 0);
		udelay(5);
		gpio_direction_input(gpio_clk);
		udelay(5);
		if (!gpio_get_value(gpio_clk))
			usleep_range(20, 30);
		if (!gpio_get_value(gpio_clk))
			msleep(10);
		gpio_clk_status = gpio_get_value(gpio_clk);
		gpio_direction_input(gpio_dat);
		udelay(5);
	}
	msm_set_i2c_mux(false, NULL, NULL,
		dev->clk_drv_str, dev->dat_drv_str);

	udelay(10);

	status = readl(dev->base + I2C_STATUS);
	if (!(status & I2C_STATUS_BUS_ACTIVE)) {
		dev_info(dev->dev, "Bus busy cleared after %d clock cycles, "
			 "status %x, intf %x\n",
			 i, status, readl(dev->base + I2C_INTERFACE_SELECT));
		return 0;
	}

	dev_warn(dev->dev, "Bus still busy, status %x, intf %x\n",
		 status, readl(dev->base + I2C_INTERFACE_SELECT));

	if(dev->reset_slave) {
		dev_warn(dev->dev, "reset slave\n");
		dev->reset_slave();
	}

	return -EBUSY;
}

static int stm_probe(struct amba_device *adev, const struct amba_id *id)
{
	int ret;
	void __iomem *base;
	unsigned long *guaranteed;
	struct device *dev = &adev->dev;
	struct coresight_platform_data *pdata = NULL;
	struct stm_drvdata *drvdata;
	struct resource *res = &adev->res;
	struct resource ch_res;
	size_t res_size, bitmap_size;
	struct coresight_desc desc = { 0 };
	struct device_node *np = adev->dev.of_node;

	if (np) {
		pdata = of_get_coresight_platform_data(dev, np);
		if (IS_ERR(pdata))
			return PTR_ERR(pdata);
		adev->dev.platform_data = pdata;
	}
	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
	if (!drvdata)
		return -ENOMEM;

	drvdata->dev = &adev->dev;
	drvdata->atclk = devm_clk_get(&adev->dev, "atclk"); /* optional */
	if (!IS_ERR(drvdata->atclk)) {
		ret = clk_prepare_enable(drvdata->atclk);
		if (ret)
			return ret;
	}
	dev_set_drvdata(dev, drvdata);

	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);
	drvdata->base = base;

	ret = stm_get_resource_byname(np, "stm-stimulus-base", &ch_res);
	if (ret)
		return ret;
	drvdata->chs.phys = ch_res.start;

	base = devm_ioremap_resource(dev, &ch_res);
	if (IS_ERR(base))
		return PTR_ERR(base);
	drvdata->chs.base = base;

	drvdata->write_bytes = stm_fundamental_data_size(drvdata);

	if (boot_nr_channel) {
		drvdata->numsp = boot_nr_channel;
		res_size = min((resource_size_t)(boot_nr_channel *
				  BYTES_PER_CHANNEL), resource_size(res));
	} else {
		drvdata->numsp = stm_num_stimulus_port(drvdata);
		res_size = min((resource_size_t)(drvdata->numsp *
				 BYTES_PER_CHANNEL), resource_size(res));
	}
	bitmap_size = BITS_TO_LONGS(drvdata->numsp) * sizeof(long);

	guaranteed = devm_kzalloc(dev, bitmap_size, GFP_KERNEL);
	if (!guaranteed)
		return -ENOMEM;
	drvdata->chs.guaranteed = guaranteed;

	spin_lock_init(&drvdata->spinlock);

	stm_init_default_data(drvdata);
	stm_init_generic_data(drvdata);

	if (stm_register_device(dev, &drvdata->stm, THIS_MODULE)) {
		dev_info(dev,
			 "stm_register_device failed, probing deferred\n");
		return -EPROBE_DEFER;
	}

	desc.type = CORESIGHT_DEV_TYPE_SOURCE;
	desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE;
	desc.ops = &stm_cs_ops;
	desc.pdata = pdata;
	desc.dev = dev;
	desc.groups = coresight_stm_groups;
	drvdata->csdev = coresight_register(&desc);
	if (IS_ERR(drvdata->csdev)) {
		ret = PTR_ERR(drvdata->csdev);
		goto stm_unregister;
	}

	pm_runtime_put(&adev->dev);

	dev_info(dev, "%s initialized\n", (char *)id->data);
	return 0;

stm_unregister:
	stm_unregister_device(&drvdata->stm);
	return ret;
}

static int twl6030_usb_probe(struct platform_device *pdev)
{
	u32 ret;
	struct twl6030_usb	*twl;
	int			status, err;
	struct device_node	*np = pdev->dev.of_node;
	struct device		*dev = &pdev->dev;
	struct twl4030_usb_data	*pdata = dev_get_platdata(dev);

	twl = devm_kzalloc(dev, sizeof(*twl), GFP_KERNEL);
	if (!twl)
		return -ENOMEM;

	twl->dev		= &pdev->dev;
	twl->irq1		= platform_get_irq(pdev, 0);
	twl->irq2		= platform_get_irq(pdev, 1);
	twl->linkstat		= MUSB_UNKNOWN;

	twl->comparator.set_vbus	= twl6030_set_vbus;
	twl->comparator.start_srp	= twl6030_start_srp;

	ret = omap_usb2_set_comparator(&twl->comparator);
	if (ret == -ENODEV) {
		dev_info(&pdev->dev, "phy not ready, deferring probe");
		return -EPROBE_DEFER;
	}

	if (np) {
		twl->regulator = "usb";
	} else if (pdata) {
		if (pdata->features & TWL6032_SUBCLASS)
			twl->regulator = "ldousb";
		else
			twl->regulator = "vusb";
	} else {
		dev_err(&pdev->dev, "twl6030 initialized without pdata\n");
		return -EINVAL;
	}

	/* init spinlock for workqueue */
	spin_lock_init(&twl->lock);

	err = twl6030_usb_ldo_init(twl);
	if (err) {
		dev_err(&pdev->dev, "ldo init failed\n");
		return err;
	}

	platform_set_drvdata(pdev, twl);
	if (device_create_file(&pdev->dev, &dev_attr_vbus))
		dev_warn(&pdev->dev, "could not create sysfs file\n");

	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);

	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
			"twl6030_usb", twl);
	if (status < 0) {
		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
			twl->irq1, status);
		device_remove_file(twl->dev, &dev_attr_vbus);
		return status;
	}

	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
			"twl6030_usb", twl);
	if (status < 0) {
		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
			twl->irq2, status);
		free_irq(twl->irq1, twl);
		device_remove_file(twl->dev, &dev_attr_vbus);
		return status;
	}

	twl->asleep = 0;
	twl6030_enable_irq(twl);
	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");

	return 0;
}

static int irqc_probe(struct platform_device *pdev)
{
	struct irqc_priv *p;
	struct resource *io;
	struct resource *irq;
	struct irq_chip *irq_chip;
	const char *name = dev_name(&pdev->dev);
	int ret;
	int k;

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p) {
		dev_err(&pdev->dev, "failed to allocate driver data\n");
		ret = -ENOMEM;
		goto err0;
	}

	p->pdev = pdev;
	platform_set_drvdata(pdev, p);

	p->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(p->clk)) {
		dev_warn(&pdev->dev, "unable to get clock\n");
		p->clk = NULL;
	}

	pm_runtime_enable(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	/* get hold of manadatory IOMEM */
	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!io) {
		dev_err(&pdev->dev, "not enough IOMEM resources\n");
		ret = -EINVAL;
		goto err1;
	}

	/* allow any number of IRQs between 1 and IRQC_IRQ_MAX */
	for (k = 0; k < IRQC_IRQ_MAX; k++) {
		irq = platform_get_resource(pdev, IORESOURCE_IRQ, k);
		if (!irq)
			break;

		p->irq[k].p = p;
		p->irq[k].requested_irq = irq->start;
	}

	p->number_of_irqs = k;
	if (p->number_of_irqs < 1) {
		dev_err(&pdev->dev, "not enough IRQ resources\n");
		ret = -EINVAL;
		goto err1;
	}

	/* ioremap IOMEM and setup read/write callbacks */
	p->iomem = ioremap_nocache(io->start, resource_size(io));
	if (!p->iomem) {
		dev_err(&pdev->dev, "failed to remap IOMEM\n");
		ret = -ENXIO;
		goto err2;
	}

	p->cpu_int_base = p->iomem + IRQC_INT_CPU_BASE(0); /* SYS-SPI */

	irq_chip = &p->irq_chip;
	irq_chip->name = name;
	irq_chip->irq_mask = irqc_irq_disable;
	irq_chip->irq_unmask = irqc_irq_enable;
	irq_chip->irq_set_type = irqc_irq_set_type;
	irq_chip->irq_set_wake = irqc_irq_set_wake;
	irq_chip->flags	= IRQCHIP_MASK_ON_SUSPEND;

	p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,
					      p->number_of_irqs, 0,
					      &irqc_irq_domain_ops, p);
	if (!p->irq_domain) {
		ret = -ENXIO;
		dev_err(&pdev->dev, "cannot initialize irq domain\n");
		goto err2;
	}

	/* request interrupts one by one */
	for (k = 0; k < p->number_of_irqs; k++) {
		if (request_irq(p->irq[k].requested_irq, irqc_irq_handler,
				0, name, &p->irq[k])) {
			dev_err(&pdev->dev, "failed to request IRQ\n");
			ret = -ENOENT;
			goto err3;
		}
	}

	dev_info(&pdev->dev, "driving %d irqs\n", p->number_of_irqs);

	return 0;
err3:
	while (--k >=