C++ pm_runtime_put函数代码示例

static int vpif_suspend(struct device *dev)
{
	pm_runtime_put(dev);
	return 0;
}

static ssize_t cyttsp5_panel_scan_show(struct device *dev,
		struct cyttsp5_attribute *attr, char *buf)
{
	struct cyttsp5_device_access_data *dad
		= cyttsp5_get_device_access_data(dev);
	int status = STATUS_FAIL;
	u8 config;
	u16 actual_read_len;
	int length = 0;
	u8 element_size = 0;
	u8 *buf_offset;
	int elem_offset = 0;
	int size;
	int rc;

	mutex_lock(&dad->sysfs_lock);

	pm_runtime_get_sync(dev);

	rc = cmd->request_exclusive(dev, CY_REQUEST_EXCLUSIVE_TIMEOUT);
	if (rc < 0) {
		dev_err(dev, "%s: Error on request exclusive r=%d\n",
				__func__, rc);
		goto put_pm_runtime;
	}

	rc = cyttsp5_suspend_scan_cmd_(dev);
	if (rc < 0) {
		dev_err(dev, "%s: Error on suspend scan r=%d\n",
				__func__, rc);
		goto release_exclusive;
	}

	rc = cyttsp5_exec_scan_cmd_(dev);
	if (rc < 0) {
		dev_err(dev, "%s: Error on execute panel scan r=%d\n",
				__func__, rc);
		goto resume_scan;
	}

	/* Set length to max to read all */
	rc = cyttsp5_ret_scan_data_cmd_(dev, 0, 0xFFFF,
			dad->panel_scan_data_id, dad->ic_buf, &config,
			&actual_read_len, NULL);
	if (rc < 0) {
		dev_err(dev, "%s: Error on retrieve panel scan r=%d\n",
				__func__, rc);
		goto resume_scan;
	}

	length = get_unaligned_le16(&dad->ic_buf[0]);
	buf_offset = dad->ic_buf + length;
	element_size = config & 0x07;
	elem_offset = actual_read_len;
	while (actual_read_len > 0) {
		rc = cyttsp5_ret_scan_data_cmd_(dev, elem_offset, 0xFFFF,
				dad->panel_scan_data_id, NULL, &config,
				&actual_read_len, buf_offset);
		if (rc < 0)
			goto resume_scan;

		length += actual_read_len * element_size;
		buf_offset = dad->ic_buf + length;
		elem_offset += actual_read_len;
	}
	/* Reconstruct cmd header */
	put_unaligned_le16(length, &dad->ic_buf[0]);
	put_unaligned_le16(elem_offset, &dad->ic_buf[7]);

	/* Do not print command header */
	length -= 5;

	status = STATUS_SUCCESS;

resume_scan:
	cyttsp5_resume_scan_cmd_(dev);

release_exclusive:
	cmd->release_exclusive(dev);

put_pm_runtime:
	pm_runtime_put(dev);

	if (status == STATUS_FAIL)
		length = 0;

	size = prepare_print_buffer(status, &dad->ic_buf[5], length, buf);

	mutex_unlock(&dad->sysfs_lock);

	return size;
}

static ssize_t cyttsp5_opens_show(struct device *dev,
		struct cyttsp5_attribute *attr, char *buf)
{
	struct cyttsp5_device_access_data *dad
		= cyttsp5_get_device_access_data(dev);
	int status = STATUS_FAIL;
	u8 cmd_status = 0;
	u8 summary_result = 0;
	u16 act_length = 0;
	int length = 0;
	int size;
	int rc;

	mutex_lock(&dad->sysfs_lock);

	pm_runtime_get_sync(dev);

	rc = cmd->request_exclusive(dev, CY_REQUEST_EXCLUSIVE_TIMEOUT);
	if (rc < 0) {
		dev_err(dev, "%s: Error on request exclusive r=%d\n",
				__func__, rc);
		goto put_pm_runtime;
	}

	rc = cyttsp5_suspend_scan_cmd_(dev);
	if (rc < 0) {
		dev_err(dev, "%s: Error on suspend scan r=%d\n",
				__func__, rc);
		goto release_exclusive;
	}

	rc = cyttsp5_run_selftest_cmd_(dev, CY_ST_ID_OPENS, 0,
			&cmd_status, &summary_result, NULL);
	if (rc < 0) {
		dev_err(dev, "%s: Error on run self test r=%d\n",
				__func__, rc);
		goto resume_scan;
	}

	/* Form response buffer */
	dad->ic_buf[0] = cmd_status;
	dad->ic_buf[1] = summary_result;

	length = 2;

	/* Get data unless test result is success */
	if (cmd_status == CY_CMD_STATUS_SUCCESS
			&& summary_result == CY_ST_RESULT_PASS)
		goto status_success;

	/* Set length to PIP_CMD_MAX_LENGTH to read all */
	rc = cyttsp5_get_selftest_result_cmd_(dev, 0, PIP_CMD_MAX_LENGTH,
			CY_ST_ID_OPENS, &cmd_status,
			&act_length, &dad->ic_buf[6]);
	if (rc < 0) {
		dev_err(dev, "%s: Error on get self test result r=%d\n",
				__func__, rc);
		goto resume_scan;
	}

	dad->ic_buf[2] = cmd_status;
	dad->ic_buf[3] = CY_ST_ID_OPENS;
	dad->ic_buf[4] = LOW_BYTE(act_length);
	dad->ic_buf[5] = HI_BYTE(act_length);

	length = 6 + act_length;

status_success:
	status = STATUS_SUCCESS;

resume_scan:
	cyttsp5_resume_scan_cmd_(dev);

release_exclusive:
	cmd->release_exclusive(dev);

put_pm_runtime:
	pm_runtime_put(dev);

	if (status == STATUS_FAIL)
		length = 0;

	size = prepare_print_buffer(status, dad->ic_buf, length, buf);

	mutex_unlock(&dad->sysfs_lock);

	return size;
}

static int link_peers(struct usb_port *left, struct usb_port *right)
{
	struct usb_port *ss_port, *hs_port;
	int rc;

	if (left->peer == right && right->peer == left)
		return 0;

	if (left->peer || right->peer) {
		struct usb_port *lpeer = left->peer;
		struct usb_port *rpeer = right->peer;
		char *method;

		if (left->location && left->location == right->location)
			method = "location";
		else
			method = "default";

		pr_warn("usb: failed to peer %s and %s by %s (%s:%s) (%s:%s)\n",
			dev_name(&left->dev), dev_name(&right->dev), method,
			dev_name(&left->dev),
			lpeer ? dev_name(&lpeer->dev) : "none",
			dev_name(&right->dev),
			rpeer ? dev_name(&rpeer->dev) : "none");
		return -EBUSY;
	}

	rc = sysfs_create_link(&left->dev.kobj, &right->dev.kobj, "peer");
	if (rc)
		return rc;
	rc = sysfs_create_link(&right->dev.kobj, &left->dev.kobj, "peer");
	if (rc) {
		sysfs_remove_link(&left->dev.kobj, "peer");
		return rc;
	}

	/*
	 * We need to wake the HiSpeed port to make sure we don't race
	 * setting ->peer with usb_port_runtime_suspend().  Otherwise we
	 * may miss a suspend event for the SuperSpeed port.
	 */
	if (left->is_superspeed) {
		ss_port = left;
		WARN_ON(right->is_superspeed);
		hs_port = right;
	} else {
		ss_port = right;
		WARN_ON(!right->is_superspeed);
		hs_port = left;
	}
	pm_runtime_get_sync(&hs_port->dev);

	left->peer = right;
	right->peer = left;

	/*
	 * The SuperSpeed reference is dropped when the HiSpeed port in
	 * this relationship suspends, i.e. when it is safe to allow a
	 * SuperSpeed connection to drop since there is no risk of a
	 * device degrading to its powered-off HiSpeed connection.
	 *
	 * Also, drop the HiSpeed ref taken above.
	 */
	pm_runtime_get_sync(&ss_port->dev);
	pm_runtime_put(&hs_port->dev);

	return 0;
}

static int cyttsp4_debug_probe(struct cyttsp4_device *ttsp)
{
	struct device *dev = &ttsp->dev;
	struct cyttsp4_debug_data *dd;
	struct cyttsp4_debug_platform_data *pdata = dev_get_platdata(dev);
	int rc;

	dev_info(dev, "%s: startup\n", __func__);
	dev_dbg(dev, "%s: debug on\n", __func__);
	dev_vdbg(dev, "%s: verbose debug on\n", __func__);

	/* get context and debug print buffers */
	dd = kzalloc(sizeof(*dd), GFP_KERNEL);
	if (dd == NULL) {
		dev_err(dev, "%s: Error, kzalloc\n", __func__);
		rc = -ENOMEM;
		goto cyttsp4_debug_probe_alloc_failed;
	}

	rc = device_create_file(dev, &dev_attr_int_count);
	if (rc) {
		dev_err(dev, "%s: Error, could not create int_count\n",
				__func__);
		goto cyttsp4_debug_probe_create_int_count_failed;
	}

	rc = device_create_file(dev, &dev_attr_formated_output);
	if (rc) {
		dev_err(dev, "%s: Error, could not create formated_output\n",
				__func__);
		goto cyttsp4_debug_probe_create_formated_failed;
	}

	mutex_init(&dd->sysfs_lock);
	dd->ttsp = ttsp;
	dd->pdata = pdata;
	dev_set_drvdata(dev, dd);

	pm_runtime_enable(dev);

	pm_runtime_get_sync(dev);
	dd->si = cyttsp4_request_sysinfo(ttsp);
	if (dd->si == NULL) {
		dev_err(dev, "%s: Fail get sysinfo pointer from core\n",
				__func__);
		rc = -ENODEV;
		goto cyttsp4_debug_probe_sysinfo_failed;
	}

	rc = cyttsp4_subscribe_attention(ttsp, CY_ATTEN_IRQ,
		cyttsp4_debug_attention, CY_MODE_OPERATIONAL);
	if (rc < 0) {
		dev_err(dev, "%s: Error, could not subscribe attention cb\n",
				__func__);
		goto cyttsp4_debug_probe_subscribe_failed;
	}
	pm_runtime_put(dev);

	return 0;

cyttsp4_debug_probe_subscribe_failed:
cyttsp4_debug_probe_sysinfo_failed:
	pm_runtime_put(dev);
	pm_runtime_suspend(dev);
	pm_runtime_disable(dev);
	dev_set_drvdata(dev, NULL);
	device_remove_file(dev, &dev_attr_formated_output);
cyttsp4_debug_probe_create_formated_failed:
	device_remove_file(dev, &dev_attr_int_count);
cyttsp4_debug_probe_create_int_count_failed:
	kfree(dd);
cyttsp4_debug_probe_alloc_failed:
	dev_err(dev, "%s failed.\n", __func__);
	return rc;
}

static void stmmac_ethtool_complete(struct net_device *netdev)
{
	struct stmmac_priv *priv = netdev_priv(netdev);

	pm_runtime_put(priv->device);
}

static int s3c_camif_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct s3c_camif_plat_data *pdata = dev->platform_data;
	struct s3c_camif_drvdata *drvdata;
	struct camif_dev *camif;
	struct resource *mres;
	int ret = 0;

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

	spin_lock_init(&camif->slock);
	mutex_init(&camif->lock);

	camif->dev = dev;

	if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
		dev_err(dev, "wrong platform data\n");
		return -EINVAL;
	}

	camif->pdata = *pdata;
	drvdata = (void *)platform_get_device_id(pdev)->driver_data;
	camif->variant = drvdata->variant;

	mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	camif->io_base = devm_ioremap_resource(dev, mres);
	if (IS_ERR(camif->io_base))
		return PTR_ERR(camif->io_base);

	ret = camif_request_irqs(pdev, camif);
	if (ret < 0)
		return ret;

	ret = pdata->gpio_get();
	if (ret < 0)
		return ret;

	ret = s3c_camif_create_subdev(camif);
	if (ret < 0)
		goto err_sd;

	ret = camif_clk_get(camif);
	if (ret < 0)
		goto err_clk;

	platform_set_drvdata(pdev, camif);
	clk_set_rate(camif->clock[CLK_CAM],
			camif->pdata.sensor.clock_frequency);

	dev_info(dev, "sensor clock frequency: %lu\n",
		 clk_get_rate(camif->clock[CLK_CAM]));
	/*
	 * Set initial pixel format, resolution and crop rectangle.
	 * Must be done before a sensor subdev is registered as some
	 * settings are overrode with values from sensor subdev.
	 */
	s3c_camif_set_defaults(camif);

	pm_runtime_enable(dev);

	ret = pm_runtime_get_sync(dev);
	if (ret < 0)
		goto err_pm;

	ret = camif_media_dev_init(camif);
	if (ret < 0)
		goto err_alloc;

	ret = camif_register_sensor(camif);
	if (ret < 0)
		goto err_sens;

	ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
	if (ret < 0)
		goto err_sens;

	ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
	if (ret < 0)
		goto err_sens;

	ret = camif_register_video_nodes(camif);
	if (ret < 0)
		goto err_sens;

	ret = camif_create_media_links(camif);
	if (ret < 0)
		goto err_sens;

	ret = media_device_register(&camif->media_dev);
	if (ret < 0)
		goto err_sens;

	pm_runtime_put(dev);
	return 0;

err_sens:
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			return ret;
	}

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

	if (gpio_is_valid(omap_up_info->DTR_gpio) &&
	    omap_up_info->DTR_present) {
		up->DTR_gpio = omap_up_info->DTR_gpio;
		up->DTR_inverted = omap_up_info->DTR_inverted;
	} else
		up->DTR_gpio = -EINVAL;
	up->DTR_active = 0;

	up->dev = &pdev->dev;
	up->port.dev = &pdev->dev;
	up->port.type = PORT_OMAP;
	up->port.iotype = UPIO_MEM;
	up->port.irq = irq->start;

	up->port.regshift = 2;
	up->port.fifosize = 64;
	up->port.ops = &serial_omap_pops;

	if (pdev->dev.of_node)
		up->port.line = of_alias_get_id(pdev->dev.of_node, "serial");
	else
		up->port.line = pdev->id;

	if (up->port.line < 0) {
		dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",
								up->port.line);
		ret = -ENODEV;
		goto err_port_line;
	}

	up->pins = devm_pinctrl_get_select_default(&pdev->dev);
	if (IS_ERR(up->pins)) {
		dev_warn(&pdev->dev, "did not get pins for uart%i error: %li\n",
			 up->port.line, PTR_ERR(up->pins));
		up->pins = NULL;
	}

	sprintf(up->name, "OMAP UART%d", up->port.line);
	up->port.mapbase = mem->start;
	up->port.membase = devm_ioremap(&pdev->dev, mem->start,
						resource_size(mem));
	if (!up->port.membase) {
		dev_err(&pdev->dev, "can't ioremap UART\n");
		ret = -ENOMEM;
		goto err_ioremap;
	}

	up->port.flags = omap_up_info->flags;
	up->port.uartclk = omap_up_info->uartclk;
	if (!up->port.uartclk) {
		up->port.uartclk = DEFAULT_CLK_SPEED;
		dev_warn(&pdev->dev, "No clock speed specified: using default:"
						"%d\n", DEFAULT_CLK_SPEED);
	}

	up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
	up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
	pm_qos_add_request(&up->pm_qos_request,
		PM_QOS_CPU_DMA_LATENCY, up->latency);
	serial_omap_uart_wq = create_singlethread_workqueue(up->name);
	INIT_WORK(&up->qos_work, serial_omap_uart_qos_work);

	platform_set_drvdata(pdev, up);
	pm_runtime_enable(&pdev->dev);
	pm_runtime_use_autosuspend(&pdev->dev);
	pm_runtime_set_autosuspend_delay(&pdev->dev,
			omap_up_info->autosuspend_timeout);

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

	omap_serial_fill_features_erratas(up);

	ui[up->port.line] = up;
	serial_omap_add_console_port(up);

	ret = uart_add_one_port(&serial_omap_reg, &up->port);
	if (ret != 0)
		goto err_add_port;

	pm_runtime_mark_last_busy(up->dev);
	pm_runtime_put_autosuspend(up->dev);
	return 0;

err_add_port:
	pm_runtime_put(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
err_ioremap:
err_port_line:
	dev_err(&pdev->dev, "[UART%d]: failure [%s]: %d\n",
				pdev->id, __func__, ret);
	return ret;
}

static int dwc3_probe(struct platform_device *pdev)
{
	struct device		*dev = &pdev->dev;
	struct resource		*res;
	struct dwc3		*dwc;

	int			ret;

	void __iomem		*regs;

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

	dwc->dev = dev;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "missing memory resource\n");
		return -ENODEV;
	}

	dwc->xhci_resources[0].start = res->start;
	dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
					DWC3_XHCI_REGS_END;
	dwc->xhci_resources[0].flags = res->flags;
	dwc->xhci_resources[0].name = res->name;

	res->start += DWC3_GLOBALS_REGS_START;

	/*
	 * Request memory region but exclude xHCI regs,
	 * since it will be requested by the xhci-plat driver.
	 */
	regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(regs)) {
		ret = PTR_ERR(regs);
		goto err0;
	}

	dwc->regs	= regs;
	dwc->regs_size	= resource_size(res);

	dwc3_get_properties(dwc);

	platform_set_drvdata(pdev, dwc);
	dwc3_cache_hwparams(dwc);

	spin_lock_init(&dwc->lock);

	pm_runtime_set_active(dev);
	pm_runtime_use_autosuspend(dev);
	pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY);
	pm_runtime_enable(dev);
	ret = pm_runtime_get_sync(dev);
	if (ret < 0)
		goto err1;

	pm_runtime_forbid(dev);

	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
	if (ret) {
		dev_err(dwc->dev, "failed to allocate event buffers\n");
		ret = -ENOMEM;
		goto err2;
	}

	ret = dwc3_get_dr_mode(dwc);
	if (ret)
		goto err3;

	ret = dwc3_alloc_scratch_buffers(dwc);
	if (ret)
		goto err3;

	ret = dwc3_core_init(dwc);
	if (ret) {
		dev_err(dev, "failed to initialize core\n");
		goto err4;
	}

	dwc3_check_params(dwc);

	ret = dwc3_core_init_mode(dwc);
	if (ret)
		goto err5;

	dwc3_debugfs_init(dwc);
	pm_runtime_put(dev);

	return 0;

err5:
	dwc3_event_buffers_cleanup(dwc);

err4:
	dwc3_free_scratch_buffers(dwc);

err3:
	dwc3_free_event_buffers(dwc);
//.........这里部分代码省略.........

static irqreturn_t regmap_irq_thread(int irq, void *d)
{
	struct regmap_irq_chip_data *data = d;
	const struct regmap_irq_chip *chip = data->chip;
	struct regmap *map = data->map;
	int ret, i;
	bool handled = false;
	u32 reg;

	if (chip->runtime_pm) {
		ret = pm_runtime_get_sync(map->dev);
		if (ret < 0) {
			dev_err(map->dev, "IRQ thread failed to resume: %d\n",
				ret);
			return IRQ_NONE;
		}
	}

	/*
	 * Ignore masked IRQs and ack if we need to; we ack early so
	 * there is no race between handling and acknowleding the
	 * interrupt.  We assume that typically few of the interrupts
	 * will fire simultaneously so don't worry about overhead from
	 * doing a write per register.
	 */
	for (i = 0; i < data->chip->num_regs; i++) {
		ret = regmap_read(map, chip->status_base + (i * map->reg_stride
				   * data->irq_reg_stride),
				   &data->status_buf[i]);

		if (ret != 0) {
			dev_err(map->dev, "Failed to read IRQ status: %d\n",
					ret);
			if (chip->runtime_pm)
				pm_runtime_put(map->dev);
			return IRQ_NONE;
		}

		data->status_buf[i] &= ~data->mask_buf[i];

		if (data->status_buf[i] && chip->ack_base) {
			reg = chip->ack_base +
				(i * map->reg_stride * data->irq_reg_stride);
			ret = regmap_write(map, reg, data->status_buf[i]);
			if (ret != 0)
				dev_err(map->dev, "Failed to ack 0x%x: %d\n",
					reg, ret);
		}
	}

	for (i = 0; i < chip->num_irqs; i++) {
		if (data->status_buf[chip->irqs[i].reg_offset /
				     map->reg_stride] & chip->irqs[i].mask) {
			handle_nested_irq(irq_find_mapping(data->domain, i));
			handled = true;
		}
	}

	if (chip->runtime_pm)
		pm_runtime_put(map->dev);

	if (handled)
		return IRQ_HANDLED;
	else
		return IRQ_NONE;
}

//.........这里部分代码省略.........
				       &mpu3050->orientation);
	if (ret)
		return ret;

	/* Fetch and turn on regulators */
	mpu3050->regs[0].supply = mpu3050_reg_vdd;
	mpu3050->regs[1].supply = mpu3050_reg_vlogic;
	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(mpu3050->regs),
				      mpu3050->regs);
	if (ret) {
		dev_err(dev, "Cannot get regulators\n");
		return ret;
	}

	ret = mpu3050_power_up(mpu3050);
	if (ret)
		return ret;

	ret = regmap_read(map, MPU3050_CHIP_ID_REG, &val);
	if (ret) {
		dev_err(dev, "could not read device ID\n");
		ret = -ENODEV;

		goto err_power_down;
	}

	if ((val & MPU3050_CHIP_ID_MASK) != MPU3050_CHIP_ID) {
		dev_err(dev, "unsupported chip id %02x\n",
				(u8)(val & MPU3050_CHIP_ID_MASK));
		ret = -ENODEV;
		goto err_power_down;
	}

	ret = regmap_read(map, MPU3050_PRODUCT_ID_REG, &val);
	if (ret) {
		dev_err(dev, "could not read device ID\n");
		ret = -ENODEV;

		goto err_power_down;
	}
	dev_info(dev, "found MPU-3050 part no: %d, version: %d\n",
		 ((val >> 4) & 0xf), (val & 0xf));

	ret = mpu3050_hw_init(mpu3050);
	if (ret)
		goto err_power_down;

	indio_dev->dev.parent = dev;
	indio_dev->channels = mpu3050_channels;
	indio_dev->num_channels = ARRAY_SIZE(mpu3050_channels);
	indio_dev->info = &mpu3050_info;
	indio_dev->available_scan_masks = mpu3050_scan_masks;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->name = name;

	ret = iio_triggered_buffer_setup(indio_dev, iio_pollfunc_store_time,
					 mpu3050_trigger_handler,
					 &mpu3050_buffer_setup_ops);
	if (ret) {
		dev_err(dev, "triggered buffer setup failed\n");
		goto err_power_down;
	}

	ret = iio_device_register(indio_dev);
	if (ret) {
		dev_err(dev, "device register failed\n");
		goto err_cleanup_buffer;
	}

	dev_set_drvdata(dev, indio_dev);

	/* Check if we have an assigned IRQ to use as trigger */
	if (irq) {
		ret = mpu3050_trigger_probe(indio_dev, irq);
		if (ret)
			dev_err(dev, "failed to register trigger\n");
	}

	/* Enable runtime PM */
	pm_runtime_get_noresume(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	/*
	 * Set autosuspend to two orders of magnitude larger than the
	 * start-up time. 100ms start-up time means 10000ms autosuspend,
	 * i.e. 10 seconds.
	 */
	pm_runtime_set_autosuspend_delay(dev, 10000);
	pm_runtime_use_autosuspend(dev);
	pm_runtime_put(dev);

	return 0;

err_cleanup_buffer:
	iio_triggered_buffer_cleanup(indio_dev);
err_power_down:
	mpu3050_power_down(mpu3050);

	return ret;
}

static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
{
	int ret = 0;
	u32 devid;
	void __iomem *base;
	struct device *dev = &adev->dev;
	struct coresight_platform_data *pdata = NULL;
	struct tmc_drvdata *drvdata;
	struct resource *res = &adev->res;
	struct coresight_desc *desc;
	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;
	dev_set_drvdata(dev, drvdata);

	/* Validity for the resource is already checked by the AMBA core */
	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	drvdata->base = base;

	spin_lock_init(&drvdata->spinlock);

	devid = readl_relaxed(drvdata->base + CORESIGHT_DEVID);
	drvdata->config_type = BMVAL(devid, 6, 7);

	if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) {
		if (np)
			ret = of_property_read_u32(np,
						   "arm,buffer-size",
						   &drvdata->size);
		if (ret)
			drvdata->size = SZ_1M;
	} else {
		drvdata->size = readl_relaxed(drvdata->base + TMC_RSZ) * 4;
	}

	pm_runtime_put(&adev->dev);

	if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) {
		drvdata->vaddr = dma_alloc_coherent(dev, drvdata->size,
						&drvdata->paddr, GFP_KERNEL);
		if (!drvdata->vaddr)
			return -ENOMEM;

		memset(drvdata->vaddr, 0, drvdata->size);
		drvdata->buf = drvdata->vaddr;
	} else {
		drvdata->buf = devm_kzalloc(dev, drvdata->size, GFP_KERNEL);
		if (!drvdata->buf)
			return -ENOMEM;
	}

	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
	if (!desc) {
		ret = -ENOMEM;
		goto err_devm_kzalloc;
	}

	desc->pdata = pdata;
	desc->dev = dev;
	desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;

	if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) {
		desc->type = CORESIGHT_DEV_TYPE_SINK;
		desc->ops = &tmc_etb_cs_ops;
		desc->groups = coresight_etb_groups;
	} else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) {
		desc->type = CORESIGHT_DEV_TYPE_SINK;
		desc->ops = &tmc_etr_cs_ops;
		desc->groups = coresight_etr_groups;
	} else {
		desc->type = CORESIGHT_DEV_TYPE_LINKSINK;
		desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO;
		desc->ops = &tmc_etf_cs_ops;
		desc->groups = coresight_etf_groups;
	}

	drvdata->csdev = coresight_register(desc);
	if (IS_ERR(drvdata->csdev)) {
		ret = PTR_ERR(drvdata->csdev);
		goto err_devm_kzalloc;
	}

	drvdata->miscdev.name = pdata->name;
	drvdata->miscdev.minor = MISC_DYNAMIC_MINOR;
	drvdata->miscdev.fops = &tmc_fops;
	ret = misc_register(&drvdata->miscdev);
//.........这里部分代码省略.........

//.........这里部分代码省略.........

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

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, mem);
	if (IS_ERR(base))
		return PTR_ERR(base);

	up->dev = &pdev->dev;
	up->port.dev = &pdev->dev;
	up->port.type = PORT_OMAP;
	up->port.iotype = UPIO_MEM;
	up->port.irq = uartirq;
	up->wakeirq = wakeirq;
	if (!up->wakeirq)
		dev_info(up->port.dev, "no wakeirq for uart%d\n",
			 up->port.line);

	up->port.regshift = 2;
	up->port.fifosize = 64;
	up->port.ops = &serial_omap_pops;

	if (pdev->dev.of_node)
		ret = of_alias_get_id(pdev->dev.of_node, "serial");
	else
		ret = pdev->id;

	if (ret < 0) {
		dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n",
			ret);
		goto err_port_line;
	}
	up->port.line = ret;

	if (up->port.line >= OMAP_MAX_HSUART_PORTS) {
		dev_err(&pdev->dev, "uart ID %d >  MAX %d.\n", up->port.line,
			OMAP_MAX_HSUART_PORTS);
		ret = -ENXIO;
		goto err_port_line;
	}

	ret = serial_omap_probe_rs485(up, pdev->dev.of_node);
	if (ret < 0)
		goto err_rs485;

	sprintf(up->name, "OMAP UART%d", up->port.line);
	up->port.mapbase = mem->start;
	up->port.membase = base;
	up->port.flags = omap_up_info->flags;
	up->port.uartclk = omap_up_info->uartclk;
	up->port.rs485_config = serial_omap_config_rs485;
	if (!up->port.uartclk) {
		up->port.uartclk = DEFAULT_CLK_SPEED;
		dev_warn(&pdev->dev,
			 "No clock speed specified: using default: %d\n",
			 DEFAULT_CLK_SPEED);
	}

	up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
	up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
	pm_qos_add_request(&up->pm_qos_request,
		PM_QOS_CPU_DMA_LATENCY, up->latency);
	INIT_WORK(&up->qos_work, serial_omap_uart_qos_work);

	platform_set_drvdata(pdev, up);
	if (omap_up_info->autosuspend_timeout == 0)
		omap_up_info->autosuspend_timeout = -1;

	device_init_wakeup(up->dev, true);
	pm_runtime_use_autosuspend(&pdev->dev);
	pm_runtime_set_autosuspend_delay(&pdev->dev,
			omap_up_info->autosuspend_timeout);

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

	pm_runtime_get_sync(&pdev->dev);

	omap_serial_fill_features_erratas(up);

	ui[up->port.line] = up;
	serial_omap_add_console_port(up);

	ret = uart_add_one_port(&serial_omap_reg, &up->port);
	if (ret != 0)
		goto err_add_port;

	pm_runtime_mark_last_busy(up->dev);
	pm_runtime_put_autosuspend(up->dev);
	return 0;

err_add_port:
	pm_runtime_put(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
err_rs485:
err_port_line:
	return ret;
}

static int __devinit dsps_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	const struct of_device_id *match;
	const struct dsps_musb_wrapper *wrp;
	struct dsps_glue *glue;
	struct resource *iomem;
	int ret, i;

	match = of_match_node(musb_dsps_of_match, np);
	if (!match) {
		dev_err(&pdev->dev, "fail to get matching of_match struct\n");
		ret = -EINVAL;
		goto err0;
	}
	wrp = match->data;

	/* allocate glue */
	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	if (!glue) {
		dev_err(&pdev->dev, "unable to allocate glue memory\n");
		ret = -ENOMEM;
		goto err0;
	}

	/* get memory resource */
	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iomem) {
		dev_err(&pdev->dev, "failed to get usbss mem resourse\n");
		ret = -ENODEV;
		goto err1;
	}

	glue->dev = &pdev->dev;

	glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
	if (!glue->wrp) {
		dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
		ret = -ENOMEM;
		goto err1;
	}
	platform_set_drvdata(pdev, glue);

	/* enable the usbss clocks */
	pm_runtime_enable(&pdev->dev);

	ret = pm_runtime_get_sync(&pdev->dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
		goto err2;
	}

	/* create the child platform device for all instances of musb */
	for (i = 0; i < wrp->instances ; i++) {
		ret = dsps_create_musb_pdev(glue, i);
		if (ret != 0) {
			dev_err(&pdev->dev, "failed to create child pdev\n");
			/* release resources of previously created instances */
			for (i--; i >= 0 ; i--)
				dsps_delete_musb_pdev(glue, i);
			goto err3;
		}
	}

	return 0;

err3:
	pm_runtime_put(&pdev->dev);
err2:
	pm_runtime_disable(&pdev->dev);
	kfree(glue->wrp);
err1:
	kfree(glue);
err0:
	return ret;
}

//.........这里部分代码省略.........
	up.port.set_mctrl = omap8250_set_mctrl;
	up.port.pm = omap_8250_pm;
	up.port.startup = omap_8250_startup;
	up.port.shutdown = omap_8250_shutdown;
	up.port.throttle = omap_8250_throttle;
	up.port.unthrottle = omap_8250_unthrottle;
	up.port.rs485_config = omap_8250_rs485_config;

	if (pdev->dev.of_node) {
		const struct of_device_id *id;

		ret = of_alias_get_id(pdev->dev.of_node, "serial");

		of_property_read_u32(pdev->dev.of_node, "clock-frequency",
				     &up.port.uartclk);
		priv->wakeirq = irq_of_parse_and_map(pdev->dev.of_node, 1);

		id = of_match_device(of_match_ptr(omap8250_dt_ids), &pdev->dev);
		if (id && id->data)
			priv->habit |= *(u8 *)id->data;
	} else {
		ret = pdev->id;
	}
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to get alias/pdev id\n");
		return ret;
	}
	up.port.line = ret;

	if (!up.port.uartclk) {
		up.port.uartclk = DEFAULT_CLK_SPEED;
		dev_warn(&pdev->dev,
			 "No clock speed specified: using default: %d\n",
			 DEFAULT_CLK_SPEED);
	}

	priv->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
	priv->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
	pm_qos_add_request(&priv->pm_qos_request, PM_QOS_CPU_DMA_LATENCY,
			   priv->latency);
	INIT_WORK(&priv->qos_work, omap8250_uart_qos_work);

	spin_lock_init(&priv->rx_dma_lock);

	device_init_wakeup(&pdev->dev, true);
	pm_runtime_use_autosuspend(&pdev->dev);
	pm_runtime_set_autosuspend_delay(&pdev->dev, -1);

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

	pm_runtime_get_sync(&pdev->dev);

	omap_serial_fill_features_erratas(&up, priv);
	up.port.handle_irq = omap8250_no_handle_irq;
#ifdef CONFIG_SERIAL_8250_DMA
	if (pdev->dev.of_node) {
		/*
		 * Oh DMA support. If there are no DMA properties in the DT then
		 * we will fall back to a generic DMA channel which does not
		 * really work here. To ensure that we do not get a generic DMA
		 * channel assigned, we have the the_no_dma_filter_fn() here.
		 * To avoid "failed to request DMA" messages we check for DMA
		 * properties in DT.
		 */
		ret = of_property_count_strings(pdev->dev.of_node, "dma-names");
		if (ret == 2) {
			up.dma = &priv->omap8250_dma;
			priv->omap8250_dma.fn = the_no_dma_filter_fn;
			priv->omap8250_dma.tx_dma = omap_8250_tx_dma;
			priv->omap8250_dma.rx_dma = omap_8250_rx_dma;
			priv->omap8250_dma.rx_size = RX_TRIGGER;
			priv->omap8250_dma.rxconf.src_maxburst = RX_TRIGGER;
			priv->omap8250_dma.txconf.dst_maxburst = TX_TRIGGER;

			if (of_machine_is_compatible("ti,am33xx"))
				priv->habit |= OMAP_DMA_TX_KICK;
			/*
			 * pause is currently not supported atleast on omap-sdma
			 * and edma on most earlier kernels.
			 */
			priv->rx_dma_broken = true;
		}
	}
#endif
	ret = serial8250_register_8250_port(&up);
	if (ret < 0) {
		dev_err(&pdev->dev, "unable to register 8250 port\n");
		goto err;
	}
	priv->line = ret;
	platform_set_drvdata(pdev, priv);
	pm_runtime_mark_last_busy(&pdev->dev);
	pm_runtime_put_autosuspend(&pdev->dev);
	return 0;
err:
	pm_runtime_put(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	return ret;
}