void wil_pm_runtime_allow(struct wil6210_priv *wil)
{
	struct device *dev = wil_to_dev(wil);

	pm_runtime_put_noidle(dev);
	pm_runtime_set_autosuspend_delay(dev, WIL6210_AUTOSUSPEND_DELAY_MS);
	pm_runtime_use_autosuspend(dev);
	pm_runtime_allow(dev);
}

/**
 * exynos_drd_switch_start_host -  helper function for starting/stoping the host
 * controller driver.
 *
 * @otg: Pointer to the usb_otg structure.
 * @on: start / stop the host controller driver.
 *
 * Returns 0 on success otherwise negative errno.
 */
static int exynos_drd_switch_start_host(struct usb_otg *otg, int on)
{
    struct exynos_drd_switch *drd_switch = container_of(otg,
                                           struct exynos_drd_switch, otg);
    struct usb_hcd *hcd;
    struct device *xhci_dev;
    int ret = 0;

    if (!otg->host)
        return -EINVAL;

    dev_dbg(otg->phy->dev, "Turn %s host %s\n",
            on ? "on" : "off", otg->host->bus_name);

    hcd = bus_to_hcd(otg->host);
    xhci_dev = hcd->self.controller;

    if (on) {
#if !defined(CONFIG_USB_HOST_NOTIFY)
        wake_lock(&drd_switch->wakelock);
#endif
        /*
         * Clear runtime_error flag. The flag could be
         * set when user space accessed the host while DRD
         * was in B-Dev mode.
         */
        pm_runtime_disable(xhci_dev);
        if (pm_runtime_status_suspended(xhci_dev))
            pm_runtime_set_suspended(xhci_dev);
        else
            pm_runtime_set_active(xhci_dev);
        pm_runtime_enable(xhci_dev);

        ret = pm_runtime_get_sync(xhci_dev);
        if (ret < 0 && ret != -EINPROGRESS) {
            pm_runtime_put_noidle(xhci_dev);
            goto err;
        }

        exynos_drd_switch_ases_vbus_ctrl(drd_switch, 1);
    } else {
        exynos_drd_switch_ases_vbus_ctrl(drd_switch, 0);

        ret = pm_runtime_put_sync(xhci_dev);
        if (ret == -EAGAIN)
            pm_runtime_get_noresume(xhci_dev);
#if !defined(CONFIG_USB_HOST_NOTIFY)
        else
            wake_unlock(&drd_switch->wakelock);
#endif
    }

err:
    /* ret can be 1 after pm_runtime_get_sync */
    return (ret < 0) ? ret : 0;
}

static int omap2430_musb_init(struct musb *musb)
{
	u32 l;
	int status = 0;
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *plat = dev->platform_data;
	struct omap_musb_board_data *data = plat->board_data;

	musb->xceiv = usb_get_transceiver();
	if (!musb->xceiv) {
		pr_err("HS USB OTG: no transceiver configured\n");
		return -ENODEV;
	}

	INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);

	status = pm_runtime_get_sync(dev);
	if (status < 0) {
		dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
		goto err1;
	}

	l = musb_readl(musb->mregs, OTG_INTERFSEL);

	if (data->interface_type == MUSB_INTERFACE_UTMI) {
		
		l &= ~ULPI_12PIN;       
		l |= UTMI_8BIT;         
	} else {
		l |= ULPI_12PIN;
	}

	musb_writel(musb->mregs, OTG_INTERFSEL, l);

	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
			"sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
			musb_readl(musb->mregs, OTG_REVISION),
			musb_readl(musb->mregs, OTG_SYSCONFIG),
			musb_readl(musb->mregs, OTG_SYSSTATUS),
			musb_readl(musb->mregs, OTG_INTERFSEL),
			musb_readl(musb->mregs, OTG_SIMENABLE));

	musb->nb.notifier_call = musb_otg_notifications;
	status = usb_register_notifier(musb->xceiv, &musb->nb);

	if (status)
		dev_dbg(musb->controller, "notification register failed\n");

	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);

	pm_runtime_put_noidle(musb->controller);
	return 0;

err1:
	return status;
}

static int amba_remove(struct device *dev)
{
    struct amba_device *pcdev = to_amba_device(dev);
    struct amba_driver *drv = to_amba_driver(dev->driver);
    int ret;

    pm_runtime_get_sync(dev);
    ret = drv->remove(pcdev);
    pm_runtime_put_noidle(dev);

    /* Undo the runtime PM settings in amba_probe() */
    pm_runtime_disable(dev);
    pm_runtime_set_suspended(dev);
    pm_runtime_put_noidle(dev);

    amba_put_disable_pclk(pcdev);

    return ret;
}

static int exynos_ohci_bus_suspend(struct usb_hcd *hcd)
{
	int ret;
	ret = ohci_bus_suspend(hcd);

	/* Decrease pm_count that was increased at s5p_ehci_resume func. */
	pm_runtime_put_noidle(hcd->self.controller);

	return ret;
}

static int replicator_probe(struct platform_device *pdev)
{
	int ret;
	struct device *dev = &pdev->dev;
	struct coresight_platform_data *pdata = NULL;
	struct replicator_drvdata *drvdata;
	struct coresight_desc desc = { 0 };
	struct device_node *np = pdev->dev.of_node;

	if (np) {
		pdata = of_get_coresight_platform_data(dev, np);
		if (IS_ERR(pdata))
			return PTR_ERR(pdata);
		pdev->dev.platform_data = pdata;
	}

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

	drvdata->dev = &pdev->dev;
	drvdata->atclk = devm_clk_get(&pdev->dev, "atclk"); /* optional */
	if (!IS_ERR(drvdata->atclk)) {
		ret = clk_prepare_enable(drvdata->atclk);
		if (ret)
			return ret;
	}
	pm_runtime_get_noresume(&pdev->dev);
	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);
	platform_set_drvdata(pdev, drvdata);

	desc.type = CORESIGHT_DEV_TYPE_LINK;
	desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
	desc.ops = &replicator_cs_ops;
	desc.pdata = pdev->dev.platform_data;
	desc.dev = &pdev->dev;
	drvdata->csdev = coresight_register(&desc);
	if (IS_ERR(drvdata->csdev)) {
		ret = PTR_ERR(drvdata->csdev);
		goto out_disable_pm;
	}

	pm_runtime_put(&pdev->dev);

	return 0;

out_disable_pm:
	if (!IS_ERR(drvdata->atclk))
		clk_disable_unprepare(drvdata->atclk);
	pm_runtime_put_noidle(&pdev->dev);
	pm_runtime_disable(&pdev->dev);

	return ret;
}

/**
 * usb_autopm_put_interface_no_suspend - decrement a USB interface's PM-usage counter
 * @intf: the usb_interface whose counter should be decremented
 *
 * This routine decrements @intf's usage counter but does not carry out an
 * autosuspend.
 *
 * This routine can run in atomic context.
 */
void usb_autopm_put_interface_no_suspend(struct usb_interface *intf)
{
	struct usb_device       *udev = interface_to_usbdev(intf);

	usb_mark_last_busy(udev);
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
	atomic_dec(&intf->pm_usage_cnt);
#else
	intf->pm_usage_cnt--;
#endif
	pm_runtime_put_noidle(&intf->dev);
}

static int cyttsp5_spi_read_default_nosize(struct cyttsp5_adapter *adap,
	void *buf, int max)
{
	struct cyttsp5_spi *ts = dev_get_drvdata(adap->dev);
	int rc;
	pm_runtime_get_noresume(adap->dev);
	mutex_lock(&ts->lock);
	rc = cyttsp5_spi_read_default_nosize_(adap, buf, max);
	mutex_unlock(&ts->lock);
	pm_runtime_put_noidle(adap->dev);
	return rc;
}

static int iommu_enable(struct omap_iommu *obj)
{
    int ret;

    if (!arch_iommu)
        return -ENODEV;

    ret = pm_runtime_get_sync(obj->dev);
    if (ret < 0)
        pm_runtime_put_noidle(obj->dev);

    return ret < 0 ? ret : 0;
}

static int cyttsp5_spi_write_read_specific(struct cyttsp5_adapter *adap,
		u8 write_len, u8 *write_buf, u8 *read_buf)
{
	struct cyttsp5_spi *ts = dev_get_drvdata(adap->dev);
	int rc;
	pm_runtime_get_noresume(adap->dev);
	mutex_lock(&ts->lock);
	rc = cyttsp5_spi_write_read_specific_(adap, write_len, write_buf,
			read_buf);
	mutex_unlock(&ts->lock);
	pm_runtime_put_noidle(adap->dev);
	return rc;
}

static int omap_rng_probe(struct platform_device *pdev)
{
	struct omap_rng_dev *priv;
	struct resource *res;
	struct device *dev = &pdev->dev;
	int ret;

	priv = devm_kzalloc(dev, sizeof(struct omap_rng_dev), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	omap_rng_ops.priv = (unsigned long)priv;
	platform_set_drvdata(pdev, priv);
	priv->dev = dev;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	priv->base = devm_ioremap_resource(dev, res);
	if (IS_ERR(priv->base)) {
		ret = PTR_ERR(priv->base);
		goto err_ioremap;
	}

	pm_runtime_enable(&pdev->dev);
	ret = pm_runtime_get_sync(&pdev->dev);
	if (ret) {
		dev_err(&pdev->dev, "Failed to runtime_get device: %d\n", ret);
		pm_runtime_put_noidle(&pdev->dev);
		goto err_ioremap;
	}

	ret = (dev->of_node) ? of_get_omap_rng_device_details(priv, pdev) :
				get_omap_rng_device_details(priv);
	if (ret)
		goto err_ioremap;

	ret = hwrng_register(&omap_rng_ops);
	if (ret)
		goto err_register;

	dev_info(&pdev->dev, "OMAP Random Number Generator ver. %02x\n",
		 omap_rng_read(priv, RNG_REV_REG));

	return 0;

err_register:
	priv->base = NULL;
	pm_runtime_disable(&pdev->dev);
err_ioremap:
	dev_err(dev, "initialization failed.\n");
	return ret;
}

static int cyttsp4_i2c_write(struct cyttsp4_adapter *adap, u8 addr,
	const void *buf, int size)
{
	struct cyttsp4_i2c *ts = dev_get_drvdata(adap->dev);
	int rc;

	pm_runtime_get_noresume(adap->dev);
	mutex_lock(&ts->lock);
	rc = cyttsp4_i2c_write_block_data(ts, addr, size, buf);
	mutex_unlock(&ts->lock);
	pm_runtime_put_noidle(adap->dev);

	return rc;
}

static int pa12203001_set_power_state(struct pa12203001_data *data, bool on,
				      u8 mask)
{
#ifdef CONFIG_PM
	int ret;

	if (on && (mask & PA12203001_ALS_EN_MASK)) {
		mutex_lock(&data->lock);
		if (data->px_enabled) {
			ret = pa12203001_als_enable(data,
						    PA12203001_ALS_EN_MASK);
			if (ret < 0)
				goto err;
		} else {
			data->als_needs_enable = true;
		}
		mutex_unlock(&data->lock);
	}

	if (on && (mask & PA12203001_PX_EN_MASK)) {
		mutex_lock(&data->lock);
		if (data->als_enabled) {
			ret = pa12203001_px_enable(data, PA12203001_PX_EN_MASK);
			if (ret < 0)
				goto err;
		} else {
			data->px_needs_enable = true;
		}
		mutex_unlock(&data->lock);
	}

	if (on) {
		ret = pm_runtime_get_sync(&data->client->dev);
		if (ret < 0)
			pm_runtime_put_noidle(&data->client->dev);

	} else {
		pm_runtime_mark_last_busy(&data->client->dev);
		ret = pm_runtime_put_autosuspend(&data->client->dev);
	}

	return ret;

err:
	mutex_unlock(&data->lock);
	return ret;

#endif
	return 0;
}

static int cyttsp4_spi_read(struct cyttsp4_adapter *adap, u16 addr,
		void *buf, int size, int max_xfer)
{
	struct cyttsp4_spi *ts = dev_get_drvdata(adap->dev);
	int rc;

	pm_runtime_get_noresume(adap->dev);
	mutex_lock(&ts->lock);
	rc = cyttsp4_spi_read_block_data(ts, addr, size, buf, max_xfer);
	mutex_unlock(&ts->lock);
	pm_runtime_put_noidle(adap->dev);

	return rc;
}

int wil_pm_runtime_get(struct wil6210_priv *wil)
{
	int rc;
	struct device *dev = wil_to_dev(wil);

	rc = pm_runtime_get_sync(dev);
	if (rc < 0) {
		wil_err(wil, "pm_runtime_get_sync() failed, rc = %d\n", rc);
		pm_runtime_put_noidle(dev);
		return rc;
	}

	return 0;
}

/**
 * irq_chip_pm_get - Enable power for an IRQ chip
 * @data:	Pointer to interrupt specific data
 *
 * Enable the power to the IRQ chip referenced by the interrupt data
 * structure.
 */
int irq_chip_pm_get(struct irq_data *data)
{
	int retval;

	if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
		retval = pm_runtime_get_sync(data->chip->parent_device);
		if (retval < 0) {
			pm_runtime_put_noidle(data->chip->parent_device);
			return retval;
		}
	}

	return 0;
}

static void st_tty_close(struct tty_struct *tty)
{
	unsigned char i = ST_MAX_CHANNELS;
	unsigned long flags = 0;
	struct	st_data_s *st_gdata = tty->disc_data;

	pr_info("%s ", __func__);

	/* TODO:
	 * if a protocol has been registered & line discipline
	 * un-installed for some reason - what should be done ?
	 */
	spin_lock_irqsave(&st_gdata->lock, flags);
	for (i = 0; i < ST_MAX_CHANNELS; i++) {
		if (st_gdata->is_registered[i] == true)
			pr_err("%d not un-registered", i);
		st_gdata->list[i] = NULL;
		st_gdata->is_registered[i] = false;
	}
	st_gdata->protos_registered = 0;
	spin_unlock_irqrestore(&st_gdata->lock, flags);
	/*
	 * signal to UIM via KIM that -
	 * N_TI_WL ldisc is un-installed
	 */
	st_kim_complete(st_gdata->kim_data);
	st_gdata->tty = NULL;
	/* Flush any pending characters in the driver and discipline. */
	tty_ldisc_flush(tty);
	tty_driver_flush_buffer(tty);

	spin_lock_irqsave(&st_gdata->lock, flags);
	/* empty out txq and tx_waitq */
	skb_queue_purge(&st_gdata->txq);
	skb_queue_purge(&st_gdata->tx_waitq);
	/* reset the TTY Rx states of ST */
	st_gdata->rx_count = 0;
	st_gdata->rx_state = ST_W4_PACKET_TYPE;
	kfree_skb(st_gdata->rx_skb);
	st_gdata->rx_skb = NULL;
	spin_unlock_irqrestore(&st_gdata->lock, flags);

	pm_runtime_put_noidle(st_gdata->tty_dev);
	if (!pm_runtime_suspended(st_gdata->tty_dev))
		__pm_runtime_idle(st_gdata->tty_dev, 0);

	pr_debug("%s: done ", __func__);
}

static int __devexit apds9802als_remove(struct i2c_client *client)
{
	struct als_data *data = i2c_get_clientdata(client);

	pm_runtime_get_sync(&client->dev);

	als_set_power_state(client, false);
	sysfs_remove_group(&client->dev.kobj, &m_als_gr);

	pm_runtime_disable(&client->dev);
	pm_runtime_set_suspended(&client->dev);
	pm_runtime_put_noidle(&client->dev);

	kfree(data);
	return 0;
}

static int cyttsp4_i2c_write(struct cyttsp4_adapter *adap, u8 addr,
	const void *buf, int size)
{
	struct cyttsp4_i2c *ts = dev_get_drvdata(adap->dev);
	int rc;
	lmdebug_dump_buf(buf, size, "cyttsp4_i2c_write");

	pm_runtime_get_noresume(adap->dev);
	mutex_lock(&ts->lock);
	rc = cyttsp4_i2c_write_block_data(ts, addr, size, buf);
	mutex_unlock(&ts->lock);
	pm_runtime_put_noidle(adap->dev);

	//dev_dbg("%s: Done\n", __func__);
	return rc;
}

static int dw8250_remove(struct platform_device *pdev)
{
	struct dw8250_data *data = platform_get_drvdata(pdev);

	pm_runtime_get_sync(&pdev->dev);

	serial8250_unregister_port(data->line);

	if (!IS_ERR(data->clk))
		clk_disable_unprepare(data->clk);

	pm_runtime_disable(&pdev->dev);
	pm_runtime_put_noidle(&pdev->dev);

	return 0;
}