C++ pm_runtime_set_active函数代码示例

int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
				struct hid_sensor_common *attrb)
{
	int ret;
	struct iio_trigger *trig;

	trig = iio_trigger_alloc("%s-dev%d", name, indio_dev->id);
	if (trig == NULL) {
		dev_err(&indio_dev->dev, "Trigger Allocate Failed\n");
		ret = -ENOMEM;
		goto error_ret;
	}

	trig->dev.parent = indio_dev->dev.parent;
	iio_trigger_set_drvdata(trig, attrb);
	trig->ops = &hid_sensor_trigger_ops;
	ret = iio_trigger_register(trig);

	if (ret) {
		dev_err(&indio_dev->dev, "Trigger Register Failed\n");
		goto error_free_trig;
	}
	attrb->trigger = trig;
	indio_dev->trig = iio_trigger_get(trig);

	ret = pm_runtime_set_active(&indio_dev->dev);
	if (ret)
		goto error_unreg_trigger;

	iio_device_set_drvdata(indio_dev, attrb);
	pm_suspend_ignore_children(&attrb->pdev->dev, true);
	pm_runtime_enable(&attrb->pdev->dev);
	/* Default to 3 seconds, but can be changed from sysfs */
	pm_runtime_set_autosuspend_delay(&attrb->pdev->dev,
					 3000);
	pm_runtime_use_autosuspend(&attrb->pdev->dev);

	return ret;
error_unreg_trigger:
	iio_trigger_unregister(trig);
error_free_trig:
	iio_trigger_free(trig);
error_ret:
	return ret;
}

/**
 *	mmc_resume_host - resume a previously suspended host
 *	@host: mmc host
 */
int mmc_resume_host(struct mmc_host *host)
{
	int err = 0;

	mmc_bus_get(host);
	if (mmc_bus_manual_resume(host)) {
		host->bus_resume_flags |= MMC_BUSRESUME_NEEDS_RESUME;
		mmc_bus_put(host);
		return 0;
	}

	if (host->bus_ops && !host->bus_dead) {
		if (!mmc_card_keep_power(host)) {
			mmc_power_up(host);
			mmc_select_voltage(host, host->ocr);
			/*
			 * Tell runtime PM core we just powered up the card,
			 * since it still believes the card is powered off.
			 * Note that currently runtime PM is only enabled
			 * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
			 */
			if (mmc_card_sdio(host->card) &&
				(host->caps & MMC_CAP_POWER_OFF_CARD)) {
				pm_runtime_disable(&host->card->dev);
				pm_runtime_set_active(&host->card->dev);
				pm_runtime_enable(&host->card->dev);
			}
		}
		BUG_ON(!host->bus_ops->resume);
		err = host->bus_ops->resume(host);
		if (err) {
			printk(KERN_WARNING "%s: error %d during resume "
					    "(card was removed?)\n",
					    mmc_hostname(host), err);
			err = 0;
		}
	}

	/* clear flag */
	host->pm_flags &= ~MMC_PM_KEEP_POWER;
	
	mmc_bus_put(host);

	return err;
}

static int scsi_dev_type_resume(struct device *dev,
		int (*cb)(struct device *, const struct dev_pm_ops *))
{
	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
	int err = 0;

	err = cb(dev, pm);
	scsi_device_resume(to_scsi_device(dev));
	dev_dbg(dev, "scsi resume: %d\n", err);

	if (err == 0) {
		pm_runtime_disable(dev);
		pm_runtime_set_active(dev);
		pm_runtime_enable(dev);
	}

	return err;
}

static int mlx90614_pm_resume(struct device *dev)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
	struct mlx90614_data *data = iio_priv(indio_dev);
	int err;

	if (data->wakeup_gpio) {
		err = mlx90614_wakeup(data);
		if (err < 0)
			return err;

		pm_runtime_disable(dev);
		pm_runtime_set_active(dev);
		pm_runtime_enable(dev);
	}

	return 0;
}

static int dwc3_resume(struct device *dev)
{
	struct dwc3	*dwc = dev_get_drvdata(dev);
	unsigned long	flags;
	int		ret;

	usb_phy_init(dwc->usb3_phy);
	usb_phy_init(dwc->usb2_phy);
	ret = phy_init(dwc->usb2_generic_phy);
	if (ret < 0)
		return ret;

	ret = phy_init(dwc->usb3_generic_phy);
	if (ret < 0)
		goto err_usb2phy_init;

	spin_lock_irqsave(&dwc->lock, flags);

	dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl);

	switch (dwc->dr_mode) {
	case USB_DR_MODE_PERIPHERAL:
	case USB_DR_MODE_OTG:
		dwc3_gadget_resume(dwc);
		/* FALLTHROUGH */
	case USB_DR_MODE_HOST:
	default:
		/* do nothing */
		break;
	}

	spin_unlock_irqrestore(&dwc->lock, flags);

	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	return 0;

err_usb2phy_init:
	phy_exit(dwc->usb2_generic_phy);

	return ret;
}

static int scsi_bus_resume_common(struct device *dev,
		int (*cb)(struct device *, const struct dev_pm_ops *))
{
	async_func_t fn;

	if (!scsi_is_sdev_device(dev))
		fn = NULL;
	else if (cb == do_scsi_resume)
		fn = async_sdev_resume;
	else if (cb == do_scsi_thaw)
		fn = async_sdev_thaw;
	else if (cb == do_scsi_restore)
		fn = async_sdev_restore;
	else
		fn = NULL;

	/*
	 * Forcibly set runtime PM status of request queue to "active" to
	 * make sure we can again get requests from the queue (see also
	 * blk_pm_peek_request()).
	 *
	 * The resume hook will correct runtime PM status of the disk.
	 */
	if (scsi_is_sdev_device(dev) && pm_runtime_suspended(dev))
		blk_set_runtime_active(to_scsi_device(dev)->request_queue);

	if (fn) {
		async_schedule_domain(fn, dev, &scsi_sd_pm_domain);

		/*
		 * If a user has disabled async probing a likely reason
		 * is due to a storage enclosure that does not inject
		 * staggered spin-ups.  For safety, make resume
		 * synchronous as well in that case.
		 */
		if (strncmp(scsi_scan_type, "async", 5) != 0)
			async_synchronize_full_domain(&scsi_sd_pm_domain);
	} else {
		pm_runtime_disable(dev);
		pm_runtime_set_active(dev);
		pm_runtime_enable(dev);
	}
	return 0;
}

static int _omap_device_notifier_call(struct notifier_block *nb,
				      unsigned long event, void *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct omap_device *od;
	int err;

	switch (event) {
	case BUS_NOTIFY_REMOVED_DEVICE:
		if (pdev->archdata.od)
			omap_device_delete(pdev->archdata.od);
		break;
	case BUS_NOTIFY_UNBOUND_DRIVER:
		od = to_omap_device(pdev);
		if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED)) {
			dev_info(dev, "enabled after unload, idling\n");
			err = omap_device_idle(pdev);
			if (err)
				dev_err(dev, "failed to idle\n");
		}
		break;
	case BUS_NOTIFY_BIND_DRIVER:
		od = to_omap_device(pdev);
		if (od && (od->_state == OMAP_DEVICE_STATE_ENABLED) &&
		    pm_runtime_status_suspended(dev)) {
			od->_driver_status = BUS_NOTIFY_BIND_DRIVER;
			pm_runtime_set_active(dev);
		}
		break;
	case BUS_NOTIFY_ADD_DEVICE:
		if (pdev->dev.of_node)
			omap_device_build_from_dt(pdev);
		omap_auxdata_legacy_init(dev);
		/* fall through */
	default:
		od = to_omap_device(pdev);
		if (od)
			od->_driver_status = event;
	}

	return NOTIFY_DONE;
}

static int diag_smd_probe(struct platform_device *pdev)
{
	int r = 0;
	int index = -1;

	if (pdev->id == SMD_APPS_MODEM) {
		index = MODEM_DATA;
		r = smd_open("DIAG", &driver->smd_data[index].ch,
					&driver->smd_data[index],
					diag_smd_notify);
		driver->smd_data[index].ch_save =
					driver->smd_data[index].ch;
	}
#if defined(CONFIG_MSM_N_WAY_SMD)
	if (pdev->id == SMD_APPS_QDSP) {
		index = LPASS_DATA;
		r = smd_named_open_on_edge("DIAG", SMD_APPS_QDSP,
					&driver->smd_data[index].ch,
					&driver->smd_data[index],
					diag_smd_notify);
		driver->smd_data[index].ch_save =
					driver->smd_data[index].ch;
	}
#endif
	if (pdev->id == SMD_APPS_WCNSS) {
		index = WCNSS_DATA;
		r = smd_named_open_on_edge("APPS_RIVA_DATA",
					SMD_APPS_WCNSS,
					&driver->smd_data[index].ch,
					&driver->smd_data[index],
					diag_smd_notify);
		driver->smd_data[index].ch_save =
					driver->smd_data[index].ch;
	}

	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);
	pr_debug("diag: open SMD port, Id = %d, r = %d\n", pdev->id, r);

	return 0;
}

int usb_hub_create_port_device(struct usb_hub *hub, int port1)
{
	struct usb_port *port_dev = NULL;
	int retval;

	port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL);
	if (!port_dev) {
		retval = -ENOMEM;
		goto exit;
	}

	hub->ports[port1 - 1] = port_dev;
	port_dev->portnum = port1;
	port_dev->power_is_on = true;
	port_dev->dev.parent = hub->intfdev;
	port_dev->dev.groups = port_dev_group;
	port_dev->dev.type = &usb_port_device_type;
	dev_set_name(&port_dev->dev, "port%d", port1);

	retval = device_register(&port_dev->dev);
	if (retval)
		goto error_register;

	pm_runtime_set_active(&port_dev->dev);

	/* It would be dangerous if user space couldn't
	 * prevent usb device from being powered off. So don't
	 * enable port runtime pm if failed to expose port's pm qos.
	 */
	if (!dev_pm_qos_expose_flags(&port_dev->dev,
			PM_QOS_FLAG_NO_POWER_OFF))
		pm_runtime_enable(&port_dev->dev);

	device_enable_async_suspend(&port_dev->dev);
	return 0;

error_register:
	put_device(&port_dev->dev);
exit:
	return retval;
}

/**
 * ufshcd_pltfrm_probe - probe routine of the driver
 * @pdev: pointer to Platform device handle
 *
 * Returns 0 on success, non-zero value on failure
 */
static int ufshcd_pltfrm_probe(struct platform_device *pdev)
{
	struct ufs_hba *hba;
	void __iomem *mmio_base;
	struct resource *mem_res;
	int irq, err;
	struct device *dev = &pdev->dev;

	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	mmio_base = devm_ioremap_resource(dev, mem_res);
	if (IS_ERR(mmio_base)) {
		err = PTR_ERR(mmio_base);
		goto out;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(dev, "IRQ resource not available\n");
		err = -ENODEV;
		goto out;
	}

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

	err = ufshcd_init(dev, &hba, mmio_base, irq);
	if (err) {
		dev_err(dev, "Intialization failed\n");
		goto out_disable_rpm;
	}

	platform_set_drvdata(pdev, hba);

	return 0;

out_disable_rpm:
	pm_runtime_disable(&pdev->dev);
	pm_runtime_set_suspended(&pdev->dev);
out:
	return err;
}

/* RPM init */
int i915_rpm_init(struct drm_device *drm_dev)
{
	int ret = 0;
	struct device *dev = drm_dev->dev;
	struct drm_i915_private *dev_priv = drm_dev->dev_private;
	ret = i915_rpm_procfs_init(drm_dev);
	if (ret) {
		DRM_ERROR("unable to initialize procfs entry");
	}
	ret = pm_runtime_set_active(dev);
	dev_priv->rpm.ring_active = false;
	atomic_set(&dev_priv->rpm.procfs_count, 0);
	pm_runtime_allow(dev);
	/* enable Auto Suspend */
	pm_runtime_set_autosuspend_delay(dev, RPM_AUTOSUSPEND_DELAY);
	pm_runtime_use_autosuspend(dev);
	if (dev->power.runtime_error)
		DRM_ERROR("rpm init: error = %d\n", dev->power.runtime_error);

	return ret;
}

static int msm_otg_pm_resume(struct device *dev)
{
	struct msm_otg *motg = dev_get_drvdata(dev);
	int ret;

	dev_dbg(dev, "OTG PM resume\n");

	ret = msm_otg_resume(motg);
	if (ret)
		return ret;

	/*
	 * Runtime PM Documentation recommends bringing the
	 * device to full powered state upon resume.
	 */
	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	return 0;
}

/*
 * These are the device model conversion veneers; they convert the
 * device model structures to our more specific structures.
 */
static int amba_probe(struct device *dev)
{
	struct amba_device *pcdev = to_amba_device(dev);
	struct amba_driver *pcdrv = to_amba_driver(dev->driver);
	const struct amba_id *id = amba_lookup(pcdrv->id_table, pcdev);
	int ret;

	do {
		ret = of_clk_set_defaults(dev->of_node, false);
		if (ret < 0)
			break;

		ret = dev_pm_domain_attach(dev, true);
		if (ret == -EPROBE_DEFER)
			break;

		ret = amba_get_enable_pclk(pcdev);
		if (ret) {
			dev_pm_domain_detach(dev, true);
			break;
		}

		pm_runtime_get_noresume(dev);
		pm_runtime_set_active(dev);
		pm_runtime_enable(dev);

		ret = pcdrv->probe(pcdev, id);
		if (ret == 0)
			break;

		pm_runtime_disable(dev);
		pm_runtime_set_suspended(dev);
		pm_runtime_put_noidle(dev);

		amba_put_disable_pclk(pcdev);
		dev_pm_domain_detach(dev, true);
	} while (0);

	return ret;
}

static int __init exynos4x12_isp_clk_probe(struct platform_device *pdev)
{
	struct samsung_clk_provider *ctx;
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct resource *res;
	void __iomem *reg_base;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	reg_base = devm_ioremap_resource(dev, res);
	if (IS_ERR(reg_base)) {
		dev_err(dev, "failed to map registers\n");
		return PTR_ERR(reg_base);
	}

	exynos4x12_save_isp = samsung_clk_alloc_reg_dump(exynos4x12_clk_isp_save,
					ARRAY_SIZE(exynos4x12_clk_isp_save));
	if (!exynos4x12_save_isp)
		return -ENOMEM;

	ctx = samsung_clk_init(np, reg_base, CLK_NR_ISP_CLKS);
	ctx->dev = dev;

	platform_set_drvdata(pdev, ctx);

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	pm_runtime_get_sync(dev);

	samsung_clk_register_div(ctx, exynos4x12_isp_div_clks,
				 ARRAY_SIZE(exynos4x12_isp_div_clks));
	samsung_clk_register_gate(ctx, exynos4x12_isp_gate_clks,
				  ARRAY_SIZE(exynos4x12_isp_gate_clks));

	samsung_clk_of_add_provider(np, ctx);
	pm_runtime_put(dev);

	return 0;
}

static int sh_cmt_probe(struct platform_device *pdev)
{
	struct sh_cmt_priv *p = platform_get_drvdata(pdev);
	struct sh_timer_config *cfg = pdev->dev.platform_data;
	int ret;

	if (!is_early_platform_device(pdev)) {
		pm_runtime_set_active(&pdev->dev);
		pm_runtime_enable(&pdev->dev);
	}

	if (p) {
		dev_info(&pdev->dev, "kept as earlytimer\n");
		goto out;
	}

	p = kmalloc(sizeof(*p), GFP_KERNEL);
	if (p == NULL) {
		dev_err(&pdev->dev, "failed to allocate driver data\n");
		return -ENOMEM;
	}

	ret = sh_cmt_setup(p, pdev);
	if (ret) {
		kfree(p);
		pm_runtime_idle(&pdev->dev);
		return ret;
	}
	if (is_early_platform_device(pdev))
		return 0;

 out:
	if (cfg->clockevent_rating || cfg->clocksource_rating)
		pm_runtime_irq_safe(&pdev->dev);
	else
		pm_runtime_idle(&pdev->dev);

	return 0;
}