C++ devm_request_irq函数代码示例

/**
 * cdns_i2c_probe - Platform registration call
 * @pdev:	Handle to the platform device structure
 *
 * This function does all the memory allocation and registration for the i2c
 * device. User can modify the address mode to 10 bit address mode using the
 * ioctl call with option I2C_TENBIT.
 *
 * Return: 0 on success, negative error otherwise
 */
static int cdns_i2c_probe(struct platform_device *pdev)
{
	struct resource *r_mem;
	struct cdns_i2c *id;
	int ret;
	const struct of_device_id *match;

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

	platform_set_drvdata(pdev, id);

	match = of_match_node(cdns_i2c_of_match, pdev->dev.of_node);
	if (match && match->data) {
		const struct cdns_platform_data *data = match->data;
		id->quirks = data->quirks;
	}

	r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	id->membase = devm_ioremap_resource(&pdev->dev, r_mem);
	if (IS_ERR(id->membase))
		return PTR_ERR(id->membase);

	id->irq = platform_get_irq(pdev, 0);

	id->adap.dev.of_node = pdev->dev.of_node;
	id->adap.algo = &cdns_i2c_algo;
	id->adap.timeout = CDNS_I2C_TIMEOUT;
	id->adap.retries = 3;		/* Default retry value. */
	id->adap.algo_data = id;
	id->adap.dev.parent = &pdev->dev;
	init_completion(&id->xfer_done);
	snprintf(id->adap.name, sizeof(id->adap.name),
		 "Cadence I2C at %08lx", (unsigned long)r_mem->start);

	id->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(id->clk)) {
		dev_err(&pdev->dev, "input clock not found.\n");
		return PTR_ERR(id->clk);
	}
	ret = clk_prepare_enable(id->clk);
	if (ret) {
		dev_err(&pdev->dev, "Unable to enable clock.\n");
		return ret;
	}
	id->clk_rate_change_nb.notifier_call = cdns_i2c_clk_notifier_cb;
	if (clk_notifier_register(id->clk, &id->clk_rate_change_nb))
		dev_warn(&pdev->dev, "Unable to register clock notifier.\n");
	id->input_clk = clk_get_rate(id->clk);

	ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
			&id->i2c_clk);
	if (ret || (id->i2c_clk > CDNS_I2C_SPEED_MAX))
		id->i2c_clk = CDNS_I2C_SPEED_DEFAULT;

	cdns_i2c_writereg(CDNS_I2C_CR_ACK_EN | CDNS_I2C_CR_NEA | CDNS_I2C_CR_MS,
			  CDNS_I2C_CR_OFFSET);

	ret = cdns_i2c_setclk(id->input_clk, id);
	if (ret) {
		dev_err(&pdev->dev, "invalid SCL clock: %u Hz\n", id->i2c_clk);
		ret = -EINVAL;
		goto err_clk_dis;
	}

	ret = devm_request_irq(&pdev->dev, id->irq, cdns_i2c_isr, 0,
				 DRIVER_NAME, id);
	if (ret) {
		dev_err(&pdev->dev, "cannot get irq %d\n", id->irq);
		goto err_clk_dis;
	}

	ret = i2c_add_adapter(&id->adap);
	if (ret < 0) {
		dev_err(&pdev->dev, "reg adap failed: %d\n", ret);
		goto err_clk_dis;
	}

	/*
	 * Cadence I2C controller has a bug wherein it generates
	 * invalid read transaction after HW timeout in master receiver mode.
	 * HW timeout is not used by this driver and the interrupt is disabled.
	 * But the feature itself cannot be disabled. Hence maximum value
	 * is written to this register to reduce the chances of error.
	 */
	cdns_i2c_writereg(CDNS_I2C_TIMEOUT_MAX, CDNS_I2C_TIME_OUT_OFFSET);

	dev_info(&pdev->dev, "%u kHz mmio %08lx irq %d\n",
		 id->i2c_clk / 1000, (unsigned long)r_mem->start, id->irq);
//.........这里部分代码省略.........

static int orion_mdio_probe(struct platform_device *pdev)
{
	struct resource *r;
	struct mii_bus *bus;
	struct orion_mdio_dev *dev;
	int ret;

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r) {
		dev_err(&pdev->dev, "No SMI register address given\n");
		return -ENODEV;
	}

	bus = devm_mdiobus_alloc_size(&pdev->dev,
				      sizeof(struct orion_mdio_dev));
	if (!bus)
		return -ENOMEM;

	bus->name = "orion_mdio_bus";
	bus->read = orion_mdio_read;
	bus->write = orion_mdio_write;
	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii",
		 dev_name(&pdev->dev));
	bus->parent = &pdev->dev;

	dev = bus->priv;
	dev->regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
	if (!dev->regs) {
		dev_err(&pdev->dev, "Unable to remap SMI register\n");
		ret = -ENODEV;
		goto out_mdio;
	}

	init_waitqueue_head(&dev->smi_busy_wait);

	dev->clk = devm_clk_get(&pdev->dev, NULL);
	if (!IS_ERR(dev->clk))
		clk_prepare_enable(dev->clk);

	dev->err_interrupt = platform_get_irq(pdev, 0);
	if (dev->err_interrupt > 0) {
		ret = devm_request_irq(&pdev->dev, dev->err_interrupt,
					orion_mdio_err_irq,
					IRQF_SHARED, pdev->name, dev);
		if (ret)
			goto out_mdio;

		writel(MVMDIO_ERR_INT_SMI_DONE,
			dev->regs + MVMDIO_ERR_INT_MASK);

	} else if (dev->err_interrupt == -EPROBE_DEFER) {
		return -EPROBE_DEFER;
	}

	mutex_init(&dev->lock);

	if (pdev->dev.of_node)
		ret = of_mdiobus_register(bus, pdev->dev.of_node);
	else
		ret = mdiobus_register(bus);
	if (ret < 0) {
		dev_err(&pdev->dev, "Cannot register MDIO bus (%d)\n", ret);
		goto out_mdio;
	}

	platform_set_drvdata(pdev, bus);

	return 0;

out_mdio:
	if (!IS_ERR(dev->clk))
		clk_disable_unprepare(dev->clk);
	return ret;
}

static int rockchip_saradc_probe(struct platform_device *pdev)
{
	struct rockchip_saradc *info = NULL;
	struct device_node *np = pdev->dev.of_node;
	struct iio_dev *indio_dev = NULL;
	struct resource	*mem;
	const struct of_device_id *match;
	int ret;
	int irq;

	if (!np)
		return -ENODEV;

	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
	if (!indio_dev) {
		dev_err(&pdev->dev, "failed allocating iio device\n");
		return -ENOMEM;
	}
	info = iio_priv(indio_dev);

	match = of_match_device(rockchip_saradc_match, &pdev->dev);
	info->data = match->data;

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

	/*
	 * The reset should be an optional property, as it should work
	 * with old devicetrees as well
	 */
	info->reset = devm_reset_control_get(&pdev->dev, "saradc-apb");
	if (IS_ERR(info->reset)) {
		ret = PTR_ERR(info->reset);
		if (ret != -ENOENT)
			return ret;

		dev_dbg(&pdev->dev, "no reset control found\n");
		info->reset = NULL;
	}

	init_completion(&info->completion);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "no irq resource?\n");
		return irq;
	}

	ret = devm_request_irq(&pdev->dev, irq, rockchip_saradc_isr,
			       0, dev_name(&pdev->dev), info);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed requesting irq %d\n", irq);
		return ret;
	}

	info->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
	if (IS_ERR(info->pclk)) {
		dev_err(&pdev->dev, "failed to get pclk\n");
		return PTR_ERR(info->pclk);
	}

	info->clk = devm_clk_get(&pdev->dev, "saradc");
	if (IS_ERR(info->clk)) {
		dev_err(&pdev->dev, "failed to get adc clock\n");
		return PTR_ERR(info->clk);
	}

	info->vref = devm_regulator_get(&pdev->dev, "vref");
	if (IS_ERR(info->vref)) {
		dev_err(&pdev->dev, "failed to get regulator, %ld\n",
			PTR_ERR(info->vref));
		return PTR_ERR(info->vref);
	}

	if (info->reset)
		rockchip_saradc_reset_controller(info->reset);

	/*
	 * Use a default value for the converter clock.
	 * This may become user-configurable in the future.
	 */
	ret = clk_set_rate(info->clk, info->data->clk_rate);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to set adc clk rate, %d\n", ret);
		return ret;
	}

	ret = regulator_enable(info->vref);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to enable vref regulator\n");
		return ret;
	}

	ret = clk_prepare_enable(info->pclk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to enable pclk\n");
		goto err_reg_voltage;
	}
//.........这里部分代码省略.........

static int wmt_i2c_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct wmt_i2c_dev *i2c_dev;
	struct i2c_adapter *adap;
	struct resource *res;
	int err;
	u32 clk_rate;

	i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
	if (!i2c_dev)
		return -ENOMEM;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	i2c_dev->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(i2c_dev->base))
		return PTR_ERR(i2c_dev->base);

	i2c_dev->irq = irq_of_parse_and_map(np, 0);
	if (!i2c_dev->irq) {
		dev_err(&pdev->dev, "irq missing or invalid\n");
		return -EINVAL;
	}

	i2c_dev->clk = of_clk_get(np, 0);
	if (IS_ERR(i2c_dev->clk)) {
		dev_err(&pdev->dev, "unable to request clock\n");
		return PTR_ERR(i2c_dev->clk);
	}

	i2c_dev->mode = I2C_MODE_STANDARD;
	err = of_property_read_u32(np, "clock-frequency", &clk_rate);
	if ((!err) && (clk_rate == 400000))
		i2c_dev->mode = I2C_MODE_FAST;

	i2c_dev->dev = &pdev->dev;

	err = devm_request_irq(&pdev->dev, i2c_dev->irq, wmt_i2c_isr, 0,
							"i2c", i2c_dev);
	if (err) {
		dev_err(&pdev->dev, "failed to request irq %i\n", i2c_dev->irq);
		return err;
	}

	adap = &i2c_dev->adapter;
	i2c_set_adapdata(adap, i2c_dev);
	strlcpy(adap->name, "WMT I2C adapter", sizeof(adap->name));
	adap->owner = THIS_MODULE;
	adap->algo = &wmt_i2c_algo;
	adap->dev.parent = &pdev->dev;
	adap->dev.of_node = pdev->dev.of_node;

	init_completion(&i2c_dev->complete);

	err = wmt_i2c_reset_hardware(i2c_dev);
	if (err) {
		dev_err(&pdev->dev, "error initializing hardware\n");
		return err;
	}

	err = i2c_add_adapter(adap);
	if (err) {
		dev_err(&pdev->dev, "failed to add adapter\n");
		return err;
	}

	platform_set_drvdata(pdev, i2c_dev);

	return 0;
}

static int mxs_mmc_probe(struct platform_device *pdev)
{
	const struct of_device_id *of_id =
			of_match_device(mxs_mmc_dt_ids, &pdev->dev);
	struct device_node *np = pdev->dev.of_node;
	struct mxs_mmc_host *host;
	struct mmc_host *mmc;
	struct resource *iores;
	int ret = 0, irq_err;
	struct regulator *reg_vmmc;
	struct mxs_ssp *ssp;

	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	irq_err = platform_get_irq(pdev, 0);
	if (!iores || irq_err < 0)
		return -EINVAL;

	mmc = mmc_alloc_host(sizeof(struct mxs_mmc_host), &pdev->dev);
	if (!mmc)
		return -ENOMEM;

	host = mmc_priv(mmc);
	ssp = &host->ssp;
	ssp->dev = &pdev->dev;
	ssp->base = devm_ioremap_resource(&pdev->dev, iores);
	if (IS_ERR(ssp->base)) {
		ret = PTR_ERR(ssp->base);
		goto out_mmc_free;
	}

	ssp->devid = (enum mxs_ssp_id) of_id->data;

	host->mmc = mmc;
	host->sdio_irq_en = 0;

	reg_vmmc = devm_regulator_get(&pdev->dev, "vmmc");
	if (!IS_ERR(reg_vmmc)) {
		ret = regulator_enable(reg_vmmc);
		if (ret) {
			dev_err(&pdev->dev,
				"Failed to enable vmmc regulator: %d\n", ret);
			goto out_mmc_free;
		}
	}

	ssp->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(ssp->clk)) {
		ret = PTR_ERR(ssp->clk);
		goto out_mmc_free;
	}
	clk_prepare_enable(ssp->clk);

	ret = mxs_mmc_reset(host);
	if (ret) {
		dev_err(&pdev->dev, "Failed to reset mmc: %d\n", ret);
		goto out_clk_disable;
	}

	ssp->dmach = dma_request_slave_channel(&pdev->dev, "rx-tx");
	if (!ssp->dmach) {
		dev_err(mmc_dev(host->mmc),
			"%s: failed to request dma\n", __func__);
		ret = -ENODEV;
		goto out_clk_disable;
	}

	/* set mmc core parameters */
	mmc->ops = &mxs_mmc_ops;
	mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
		    MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL;

	host->broken_cd = of_property_read_bool(np, "broken-cd");

	mmc->f_min = 400000;
	mmc->f_max = 288000000;

	ret = mmc_of_parse(mmc);
	if (ret)
		goto out_clk_disable;

	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;

	mmc->max_segs = 52;
	mmc->max_blk_size = 1 << 0xf;
	mmc->max_blk_count = (ssp_is_old(ssp)) ? 0xff : 0xffffff;
	mmc->max_req_size = (ssp_is_old(ssp)) ? 0xffff : 0xffffffff;
	mmc->max_seg_size = dma_get_max_seg_size(ssp->dmach->device->dev);

	platform_set_drvdata(pdev, mmc);

	ret = devm_request_irq(&pdev->dev, irq_err, mxs_mmc_irq_handler, 0,
			       DRIVER_NAME, host);
	if (ret)
		goto out_free_dma;

	spin_lock_init(&host->lock);

	ret = mmc_add_host(mmc);
	if (ret)
		goto out_free_dma;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	if (of_flags & OF_GPIO_ACTIVE_LOW)
		flag |= GPIOF_ACTIVE_LOW;
	if (gpio_is_valid(hipcie->reset_gpio)) {
		ret = devm_gpio_request_one(dev, hipcie->reset_gpio,
				flag, "PCIe device power control");
		if (ret) {
			dev_err(dev, "unable to request gpio\n");
			return ret;
		}
	}

	hipcie->aux_clk = devm_clk_get(dev, "aux");
	if (IS_ERR(hipcie->aux_clk)) {
		dev_err(dev, "Failed to get PCIe aux clk\n");
		return PTR_ERR(hipcie->aux_clk);
	}

	hipcie->pipe_clk = devm_clk_get(dev, "pipe");
	if (IS_ERR(hipcie->pipe_clk)) {
		dev_err(dev, "Failed to get PCIe pipe clk\n");
		return PTR_ERR(hipcie->pipe_clk);
	}

	hipcie->sys_clk = devm_clk_get(dev, "sys");
	if (IS_ERR(hipcie->sys_clk)) {
		dev_err(dev, "Failed to get PCIEe sys clk\n");
		return PTR_ERR(hipcie->sys_clk);
	}

	hipcie->bus_clk = devm_clk_get(dev, "bus");
	if (IS_ERR(hipcie->bus_clk)) {
		dev_err(dev, "Failed to get PCIe bus clk\n");
		return PTR_ERR(hipcie->bus_clk);
	}

	hipcie->soft_reset = devm_reset_control_get(dev, "soft");
	if (IS_ERR(hipcie->soft_reset)) {
		dev_err(dev, "couldn't get soft reset\n");
		return PTR_ERR(hipcie->soft_reset);
	}

	hipcie->sys_reset = devm_reset_control_get(dev, "sys");
	if (IS_ERR(hipcie->sys_reset)) {
		dev_err(dev, "couldn't get sys reset\n");
		return PTR_ERR(hipcie->sys_reset);
	}

	hipcie->bus_reset = devm_reset_control_get(dev, "bus");
	if (IS_ERR(hipcie->bus_reset)) {
		dev_err(dev, "couldn't get bus reset\n");
		return PTR_ERR(hipcie->bus_reset);
	}

	if (IS_ENABLED(CONFIG_PCI_MSI)) {
		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
		if (pp->msi_irq < 0) {
			dev_err(dev, "Failed to get MSI IRQ\n");
			return pp->msi_irq;
		}

		ret = devm_request_irq(dev, pp->msi_irq,
				       histb_pcie_msi_irq_handler,
				       IRQF_SHARED, "histb-pcie-msi", pp);
		if (ret) {
			dev_err(dev, "cannot request MSI IRQ\n");
			return ret;
		}
	}

	hipcie->phy = devm_phy_get(dev, "phy");
	if (IS_ERR(hipcie->phy)) {
		dev_info(dev, "no pcie-phy found\n");
		hipcie->phy = NULL;
		/* fall through here!
		 * if no pcie-phy found, phy init
		 * should be done under boot!
		 */
	} else {
		phy_init(hipcie->phy);
	}

	pp->root_bus_nr = -1;
	pp->ops = &histb_pcie_host_ops;

	platform_set_drvdata(pdev, hipcie);

	ret = histb_pcie_host_enable(pp);
	if (ret) {
		dev_err(dev, "failed to enable host\n");
		return ret;
	}

	ret = dw_pcie_host_init(pp);
	if (ret) {
		dev_err(dev, "failed to initialize host\n");
		return ret;
	}

	return 0;
}

static int mmphw_probe(struct platform_device *pdev)
{
	struct mmp_mach_plat_info *mi;
	struct resource *res;
	int ret, i, size, irq;
	struct mmphw_path_plat *path_plat;
	struct mmphw_ctrl *ctrl = NULL;

	/* get resources from platform data */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "%s: no IO memory defined\n", __func__);
		ret = -ENOENT;
		goto failed;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "%s: no IRQ defined\n", __func__);
		ret = -ENOENT;
		goto failed;
	}

	/* get configs from platform data */
	mi = pdev->dev.platform_data;
	if (mi == NULL || !mi->path_num || !mi->paths) {
		dev_err(&pdev->dev, "%s: no platform data defined\n", __func__);
		ret = -EINVAL;
		goto failed;
	}

	/* allocate */
	size = sizeof(struct mmphw_ctrl) + sizeof(struct mmphw_path_plat) *
	       mi->path_num;
	ctrl = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	if (!ctrl) {
		ret = -ENOMEM;
		goto failed;
	}

	ctrl->name = mi->name;
	ctrl->path_num = mi->path_num;
	ctrl->dev = &pdev->dev;
	ctrl->irq = irq;
	platform_set_drvdata(pdev, ctrl);
	mutex_init(&ctrl->access_ok);

	/* map registers.*/
	if (!devm_request_mem_region(ctrl->dev, res->start,
			resource_size(res), ctrl->name)) {
		dev_err(ctrl->dev,
			"can't request region for resource %pR\n", res);
		ret = -EINVAL;
		goto failed;
	}

	ctrl->reg_base = devm_ioremap_nocache(ctrl->dev,
			res->start, resource_size(res));
	if (ctrl->reg_base == NULL) {
		dev_err(ctrl->dev, "%s: res %x - %x map failed\n", __func__,
			res->start, res->end);
		ret = -ENOMEM;
		goto failed;
	}

	/* request irq */
	ret = devm_request_irq(ctrl->dev, ctrl->irq, ctrl_handle_irq,
		IRQF_SHARED, "lcd_controller", ctrl);
	if (ret < 0) {
		dev_err(ctrl->dev, "%s unable to request IRQ %d\n",
				__func__, ctrl->irq);
		ret = -ENXIO;
		goto failed;
	}

	/* get clock */
	ctrl->clk = devm_clk_get(ctrl->dev, mi->clk_name);
	if (IS_ERR(ctrl->clk)) {
		dev_err(ctrl->dev, "unable to get clk %s\n", mi->clk_name);
		ret = -ENOENT;
		goto failed_get_clk;
	}
	clk_prepare_enable(ctrl->clk);

	/* init global regs */
	ctrl_set_default(ctrl);

	/* init pathes from machine info and register them */
	for (i = 0; i < ctrl->path_num; i++) {
		/* get from config and machine info */
		path_plat = &ctrl->path_plats[i];
		path_plat->id = i;
		path_plat->ctrl = ctrl;

		/* path init */
		if (!path_init(path_plat, &mi->paths[i])) {
			ret = -EINVAL;
			goto failed_path_init;
		}
	}
//.........这里部分代码省略.........

static int dwc3_omap_probe(struct platform_device *pdev)
{
	struct device_node	*node = pdev->dev.of_node;

	struct dwc3_omap	*omap;
	struct resource		*res;
	struct device		*dev = &pdev->dev;
	struct regulator	*vbus_reg = NULL;

	int			ret;
	int			irq;

	u32			reg;

	void __iomem		*base;

	if (!node) {
		dev_err(dev, "device node not found\n");
		return -EINVAL;
	}

	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
	if (!omap) {
		dev_err(dev, "not enough memory\n");
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, omap);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(dev, "missing IRQ resource\n");
		return -EINVAL;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	if (of_property_read_bool(node, "vbus-supply")) {
		vbus_reg = devm_regulator_get(dev, "vbus");
		if (IS_ERR(vbus_reg)) {
			dev_err(dev, "vbus init failed\n");
			return PTR_ERR(vbus_reg);
		}
	}

	omap->dev	= dev;
	omap->irq	= irq;
	omap->base	= base;
	omap->vbus_reg	= vbus_reg;
	dev->dma_mask	= &dwc3_omap_dma_mask;

	pm_runtime_enable(dev);
	ret = pm_runtime_get_sync(dev);
	if (ret < 0) {
		dev_err(dev, "get_sync failed with err %d\n", ret);
		goto err0;
	}

	dwc3_omap_map_offset(omap);
	dwc3_omap_set_utmi_mode(omap);

	/* check the DMA Status */
	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
	omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);

	ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0,
			"dwc3-omap", omap);
	if (ret) {
		dev_err(dev, "failed to request IRQ #%d --> %d\n",
				omap->irq, ret);
		goto err1;
	}

	dwc3_omap_enable_irqs(omap);

	ret = dwc3_omap_extcon_register(omap);
	if (ret < 0)
		goto err2;

	ret = of_platform_populate(node, NULL, NULL, dev);
	if (ret) {
		dev_err(&pdev->dev, "failed to create dwc3 core\n");
		goto err3;
	}

	return 0;

err3:
	if (omap->extcon_vbus_dev.edev)
		extcon_unregister_interest(&omap->extcon_vbus_dev);
	if (omap->extcon_id_dev.edev)
		extcon_unregister_interest(&omap->extcon_id_dev);

err2:
	dwc3_omap_disable_irqs(omap);

err1:
//.........这里部分代码省略.........

static int xlnx_rtc_probe(struct platform_device *pdev)
{
	struct xlnx_rtc_dev *xrtcdev;
	struct resource *res;
	int ret;
	unsigned int calibvalue;

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

	platform_set_drvdata(pdev, xrtcdev);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	xrtcdev->reg_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(xrtcdev->reg_base))
		return PTR_ERR(xrtcdev->reg_base);

	xrtcdev->alarm_irq = platform_get_irq_byname(pdev, "alarm");
	if (xrtcdev->alarm_irq < 0) {
		dev_err(&pdev->dev, "no irq resource\n");
		return xrtcdev->alarm_irq;
	}
	ret = devm_request_irq(&pdev->dev, xrtcdev->alarm_irq,
				xlnx_rtc_interrupt, 0,
				dev_name(&pdev->dev), xrtcdev);
	if (ret) {
		dev_err(&pdev->dev, "request irq failed\n");
		return ret;
	}

	xrtcdev->sec_irq = platform_get_irq_byname(pdev, "sec");
	if (xrtcdev->sec_irq < 0) {
		dev_err(&pdev->dev, "no irq resource\n");
		return xrtcdev->sec_irq;
	}
	ret = devm_request_irq(&pdev->dev, xrtcdev->sec_irq,
				xlnx_rtc_interrupt, 0,
				dev_name(&pdev->dev), xrtcdev);
	if (ret) {
		dev_err(&pdev->dev, "request irq failed\n");
		return ret;
	}

	ret = of_property_read_u32(pdev->dev.of_node, "calibration",
					&calibvalue);
	if (ret)
		calibvalue = RTC_CALIB_DEF;

	xlnx_init_rtc(xrtcdev, calibvalue);

	device_init_wakeup(&pdev->dev, 1);

	xrtcdev->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
					 &xlnx_rtc_ops, THIS_MODULE);
	if (IS_ERR(xrtcdev->rtc)) {
		return PTR_ERR(xrtcdev->rtc);
	}

	return 0;
}

static int imx_keypad_probe(struct platform_device *pdev)
{
	const struct matrix_keymap_data *keymap_data =
			dev_get_platdata(&pdev->dev);
	struct imx_keypad *keypad;
	struct input_dev *input_dev;
	struct resource *res;
	int irq, error, i, row, col;

	if (!keymap_data && !pdev->dev.of_node) {
		dev_err(&pdev->dev, "no keymap defined\n");
		return -EINVAL;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "no irq defined in platform data\n");
		return irq;
	}

	input_dev = devm_input_allocate_device(&pdev->dev);
	if (!input_dev) {
		dev_err(&pdev->dev, "failed to allocate the input device\n");
		return -ENOMEM;
	}

	keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
	if (!keypad) {
		dev_err(&pdev->dev, "not enough memory for driver data\n");
		return -ENOMEM;
	}

	keypad->input_dev = input_dev;
	keypad->irq = irq;
	keypad->stable_count = 0;

	timer_setup(&keypad->check_matrix_timer,
		    imx_keypad_check_for_events, 0);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	keypad->mmio_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(keypad->mmio_base))
		return PTR_ERR(keypad->mmio_base);

	keypad->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(keypad->clk)) {
		dev_err(&pdev->dev, "failed to get keypad clock\n");
		return PTR_ERR(keypad->clk);
	}

	/* Init the Input device */
	input_dev->name = pdev->name;
	input_dev->id.bustype = BUS_HOST;
	input_dev->dev.parent = &pdev->dev;
	input_dev->open = imx_keypad_open;
	input_dev->close = imx_keypad_close;

	error = matrix_keypad_build_keymap(keymap_data, NULL,
					   MAX_MATRIX_KEY_ROWS,
					   MAX_MATRIX_KEY_COLS,
					   keypad->keycodes, input_dev);
	if (error) {
		dev_err(&pdev->dev, "failed to build keymap\n");
		return error;
	}

	/* Search for rows and cols enabled */
	for (row = 0; row < MAX_MATRIX_KEY_ROWS; row++) {
		for (col = 0; col < MAX_MATRIX_KEY_COLS; col++) {
			i = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
			if (keypad->keycodes[i] != KEY_RESERVED) {
				keypad->rows_en_mask |= 1 << row;
				keypad->cols_en_mask |= 1 << col;
			}
		}
	}
	dev_dbg(&pdev->dev, "enabled rows mask: %x\n", keypad->rows_en_mask);
	dev_dbg(&pdev->dev, "enabled cols mask: %x\n", keypad->cols_en_mask);

	__set_bit(EV_REP, input_dev->evbit);
	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
	input_set_drvdata(input_dev, keypad);

	/* Ensure that the keypad will stay dormant until opened */
	error = clk_prepare_enable(keypad->clk);
	if (error)
		return error;
	imx_keypad_inhibit(keypad);
	clk_disable_unprepare(keypad->clk);

	error = devm_request_irq(&pdev->dev, irq, imx_keypad_irq_handler, 0,
			    pdev->name, keypad);
	if (error) {
		dev_err(&pdev->dev, "failed to request IRQ\n");
		return error;
	}

	/* Register the input device */
	error = input_register_device(input_dev);
	if (error) {
//.........这里部分代码省略.........

static int ds1511_rtc_probe(struct platform_device *pdev)
{
	struct rtc_device *rtc;
	struct resource *res;
	struct rtc_plat_data *pdata;
	int ret = 0;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;
	pdata->size = resource_size(res);
	if (!devm_request_mem_region(&pdev->dev, res->start, pdata->size,
			pdev->name))
		return -EBUSY;
	ds1511_base = devm_ioremap(&pdev->dev, res->start, pdata->size);
	if (!ds1511_base)
		return -ENOMEM;
	pdata->ioaddr = ds1511_base;
	pdata->irq = platform_get_irq(pdev, 0);

	/*
	 * turn on the clock and the crystal, etc.
	 */
	rtc_write(0, RTC_CMD);
	rtc_write(0, RTC_CMD1);
	/*
	 * clear the wdog counter
	 */
	rtc_write(0, DS1511_WD_MSEC);
	rtc_write(0, DS1511_WD_SEC);
	/*
	 * start the clock
	 */
	rtc_enable_update();

	/*
	 * check for a dying bat-tree
	 */
	if (rtc_read(RTC_CMD1) & DS1511_BLF1)
		dev_warn(&pdev->dev, "voltage-low detected.\n");

	spin_lock_init(&pdata->lock);
	platform_set_drvdata(pdev, pdata);
	/*
	 * if the platform has an interrupt in mind for this device,
	 * then by all means, set it
	 */
	if (pdata->irq > 0) {
		rtc_read(RTC_CMD1);
		if (devm_request_irq(&pdev->dev, pdata->irq, ds1511_interrupt,
			IRQF_SHARED, pdev->name, pdev) < 0) {

			dev_warn(&pdev->dev, "interrupt not available.\n");
			pdata->irq = 0;
		}
	}

	rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &ds1511_rtc_ops,
					THIS_MODULE);
	if (IS_ERR(rtc))
		return PTR_ERR(rtc);
	pdata->rtc = rtc;

	ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);

	return ret;
}

static int fsl_esai_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct fsl_esai *esai_priv;
	struct resource *res;
	const uint32_t *iprop;
	void __iomem *regs;
	int irq, ret;

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

	esai_priv->pdev = pdev;
	strncpy(esai_priv->name, np->name, sizeof(esai_priv->name) - 1);

	/* Get the addresses and IRQ */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(regs))
		return PTR_ERR(regs);

	esai_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
			"core", regs, &fsl_esai_regmap_config);
	if (IS_ERR(esai_priv->regmap)) {
		dev_err(&pdev->dev, "failed to init regmap: %ld\n",
				PTR_ERR(esai_priv->regmap));
		return PTR_ERR(esai_priv->regmap);
	}

	esai_priv->coreclk = devm_clk_get(&pdev->dev, "core");
	if (IS_ERR(esai_priv->coreclk)) {
		dev_err(&pdev->dev, "failed to get core clock: %ld\n",
				PTR_ERR(esai_priv->coreclk));
		return PTR_ERR(esai_priv->coreclk);
	}

	esai_priv->extalclk = devm_clk_get(&pdev->dev, "extal");
	if (IS_ERR(esai_priv->extalclk))
		dev_warn(&pdev->dev, "failed to get extal clock: %ld\n",
				PTR_ERR(esai_priv->extalclk));

	esai_priv->fsysclk = devm_clk_get(&pdev->dev, "fsys");
	if (IS_ERR(esai_priv->fsysclk))
		dev_warn(&pdev->dev, "failed to get fsys clock: %ld\n",
				PTR_ERR(esai_priv->fsysclk));

	esai_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
	if (IS_ERR(esai_priv->spbaclk))
		dev_warn(&pdev->dev, "failed to get spba clock: %ld\n",
				PTR_ERR(esai_priv->spbaclk));

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);
		return irq;
	}

	ret = devm_request_irq(&pdev->dev, irq, esai_isr, 0,
			       esai_priv->name, esai_priv);
	if (ret) {
		dev_err(&pdev->dev, "failed to claim irq %u\n", irq);
		return ret;
	}

	/* Set a default slot number */
	esai_priv->slots = 2;

	/* Set a default master/slave state */
	esai_priv->slave_mode = true;

	/* Determine the FIFO depth */
	iprop = of_get_property(np, "fsl,fifo-depth", NULL);
	if (iprop)
		esai_priv->fifo_depth = be32_to_cpup(iprop);
	else
		esai_priv->fifo_depth = 64;

	esai_priv->dma_params_tx.maxburst = 16;
	esai_priv->dma_params_rx.maxburst = 16;
	esai_priv->dma_params_tx.addr = res->start + REG_ESAI_ETDR;
	esai_priv->dma_params_rx.addr = res->start + REG_ESAI_ERDR;

	esai_priv->synchronous =
		of_property_read_bool(np, "fsl,esai-synchronous");

	/* Implement full symmetry for synchronous mode */
	if (esai_priv->synchronous) {
		fsl_esai_dai.symmetric_rates = 1;
		fsl_esai_dai.symmetric_channels = 1;
		fsl_esai_dai.symmetric_samplebits = 1;
	}

	dev_set_drvdata(&pdev->dev, esai_priv);

	/* Reset ESAI unit */
	ret = regmap_write(esai_priv->regmap, REG_ESAI_ECR, ESAI_ECR_ERST);
	if (ret) {
		dev_err(&pdev->dev, "failed to reset ESAI: %d\n", ret);
		return ret;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	ioaddr->ctl_addr = iomap[1];
	ioaddr->altstatus_addr = iomap[1];
	ioaddr->bmdma_addr = iomap[4];
	ata_sff_std_ports(ioaddr);

	ata_port_desc(host->ports[0],
		      "cmd 0x%x ctl 0x%x", cmd_port[0], ctl_port[0]);
	ata_port_pbar_desc(host->ports[0], 4, 0, "bmdma");

	ioaddr = &host->ports[1]->ioaddr;
	ioaddr->cmd_addr = iomap[2];
	ioaddr->ctl_addr = iomap[3];
	ioaddr->altstatus_addr = iomap[3];
	ioaddr->bmdma_addr = iomap[4] + 8;
	ata_sff_std_ports(ioaddr);

	ata_port_desc(host->ports[1],
		      "cmd 0x%x ctl 0x%x", cmd_port[1], ctl_port[1]);
	ata_port_pbar_desc(host->ports[1], 4, 8, "bmdma");

	/* activate the host */
	pci_set_master(pdev);
	rc = ata_host_start(host);
	if (rc)
		return rc;

	for (i = 0; i < 2; i++) {
		static const int irq[] = { 14, 15 };
		struct ata_port *ap = host->ports[i];

		if (ata_port_is_dummy(ap))
			continue;

		rc = devm_request_irq(&pdev->dev, irq[ap->port_no],
				      ata_sff_interrupt, 0, DRV_NAME, host);
		if (rc)
			return rc;

		ata_port_desc(ap, "irq %d", irq[i]);
	}

	return ata_host_register(host, &cs5520_sht);
}

#ifdef CONFIG_PM
/**
 *	cs5520_reinit_one	-	device resume
 *	@pdev: PCI device
 *
 *	Do any reconfiguration work needed by a resume from RAM. We need
 *	to restore DMA mode support on BIOSen which disabled it
 */

static int cs5520_reinit_one(struct pci_dev *pdev)
{
	struct ata_host *host = dev_get_drvdata(&pdev->dev);
	u8 pcicfg;
	int rc;

	rc = ata_pci_device_do_resume(pdev);
	if (rc)
		return rc;

	pci_read_config_byte(pdev, 0x60, &pcicfg);
	if ((pcicfg & 0x40) == 0)
		pci_write_config_byte(pdev, 0x60, pcicfg | 0x40);

/**
 * exynos_drd_switch_init - Initializes DRD role switch.
 *
 * @drd: Pointer to DRD controller structure.
 *
 * Returns 0 on success otherwise negative errno.
 */
int exynos_drd_switch_init(struct exynos_drd *drd)
{
	struct dwc3_exynos_data *pdata = drd->pdata;
	struct exynos_drd_switch *drd_switch;
	int ret = 0;
	unsigned long irq_flags = 0;

	dev_dbg(drd->dev, "%s\n", __func__);

	drd_switch = devm_kzalloc(drd->dev, sizeof(struct exynos_drd_switch),
				  GFP_KERNEL);
	if (!drd_switch) {
		dev_err(drd->dev, "not enough memory for DRD switch\n");
		return -ENOMEM;
	}

	drd_switch->core = &drd->core;
	atomic_set(&drd_switch->sm_reset, 0);

	/* ID pin gpio IRQ */
	drd_switch->id_irq = pdata->id_irq;
	if (drd_switch->id_irq < 0)
		dev_dbg(drd->dev, "cannot find ID irq\n");

	init_timer(&drd_switch->id_db_timer);
	drd_switch->id_db_timer.data = (unsigned long) drd_switch;
	drd_switch->id_db_timer.function = exynos_drd_switch_debounce;

	/* VBus pin gpio IRQ */
	drd_switch->vbus_irq = pdata->vbus_irq;
	if (drd_switch->vbus_irq < 0)
		dev_dbg(drd->dev, "cannot find VBUS irq\n");

	init_timer(&drd_switch->vbus_db_timer);
	drd_switch->vbus_db_timer.data = (unsigned long) drd_switch;
	drd_switch->vbus_db_timer.function = exynos_drd_switch_debounce;

	irq_flags = pdata->irq_flags;

	drd_switch->otg.set_peripheral = exynos_drd_switch_set_peripheral;
	drd_switch->otg.set_host = exynos_drd_switch_set_host;

	/* Save for using by host and peripheral */
	drd->core.otg = &drd_switch->otg;

	drd_switch->otg.phy = devm_kzalloc(drd->dev, sizeof(struct usb_phy),
					   GFP_KERNEL);
	if (!drd_switch->otg.phy) {
		dev_err(drd->dev, "cannot allocate OTG phy\n");
		return -ENOMEM;
	}

	drd_switch->otg.phy->otg = &drd_switch->otg;
	drd_switch->otg.phy->dev = drd->dev;
#if 0
	/*
	 * TODO: we need to have support for multiple transceivers here.
	 * Kernel > 3.5 should already have it. Now it works only for one
	 * drd channel.
	 */
	ret = usb_set_transceiver(drd_switch->otg.phy);
	if (ret) {
		dev_err(drd->dev,
			"failed to set transceiver, already exists\n",
			__func__);
		goto err2;
	}
#endif
	spin_lock_init(&drd_switch->lock);

	wake_lock_init(&drd_switch->wakelock,
		WAKE_LOCK_SUSPEND, "drd_switch");

	exynos_drd_switch_reset(drd, 0);

	drd_switch->wq = create_freezable_workqueue("drd_switch");
	if (!drd_switch->wq) {
		dev_err(drd->dev, "cannot create workqueue\n");
		ret = -ENOMEM;
		goto err_wq;
	}

	INIT_DELAYED_WORK(&drd_switch->work, exynos_drd_switch_work);

	if (drd_switch->id_irq >= 0) {
		ret = devm_request_irq(drd->dev, drd_switch->id_irq,
				  exynos_drd_switch_id_interrupt, irq_flags,
				  "drd_switch_id", drd_switch);
		if (ret) {
			dev_err(drd->dev, "cannot claim ID irq\n");
			goto err_irq;
		}
	}
//.........这里部分代码省略.........

static int hisi_powerkey_probe(struct platform_device *pdev)
{
    struct hisi_powerkey_info *info = NULL;
    struct device *dev = &pdev->dev;
    int ret = 0;

    if(NULL == pdev) {
        dev_err(dev, "[Pwrkey]parameter error!\n");
        ret = -EINVAL;
        return ret;
    }

#ifdef CONFIG_FB_HI6220_CLCD
	init_timer(&lcd_pwr_status.lcd_dsm_t);
	lcd_pwr_status.panel_power_on = true;
#endif
    info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
    if (!info)
        return -ENOMEM;

	info->idev = input_allocate_device();
	if (!info->idev) {
		dev_err(&pdev->dev, "Failed to allocate input device\n");
		ret = -ENOENT;
		return ret;
	}

	info->idev->name = "hisi_on";
	info->idev->phys = "hisi_on/input0";
	info->idev->dev.parent = &pdev->dev;
	info->idev->evbit[0] = BIT_MASK(EV_KEY);
	__set_bit(KEY_POWER, info->idev->keybit);

	wake_lock_init(&info->pwr_wake_lock, WAKE_LOCK_SUSPEND, "android-pwr");


#if defined (CONFIG_HUAWEI_DSM)
	/* initialize the statistic variable */
	powerkey_press_count = 0;
	powerkey_last_press_time = 0;
	setup_timer(&dsm_powerkey_timer, powerkey_timer_func, (unsigned long)info);
#endif

	info->irq[0] = platform_get_irq_byname(pdev, "down");
	if (info->irq[0] < 0) {
		dev_err(dev, "failed to get down irq id\n");
		ret = -ENOENT;
		goto unregister_err;
	}

	ret = devm_request_irq(dev, info->irq[0], hisi_powerkey_handler,
			       IRQF_NO_SUSPEND, "down", info);
	if (ret < 0) {
		dev_err(dev, "failed to request down irq\n");
		ret = -ENOENT;
		goto unregister_err;
	}

	info->irq[1] = platform_get_irq_byname(pdev, "up");
	if (info->irq[1] < 0) {
		dev_err(dev, "failed to get up irq id\n");
		ret = -ENOENT;
		goto unregister_err;
	}

	ret = devm_request_irq(dev, info->irq[1], hisi_powerkey_handler,
			       IRQF_NO_SUSPEND, "up", info);
	if (ret < 0) {
		dev_err(dev, "failed to request up irq\n");
		ret = -ENOENT;
		goto unregister_err;
	}

	info->irq[2] = platform_get_irq_byname(pdev, "hold 1s");
	if (info->irq[2] < 0) {
		dev_err(dev, "failed to get hold 1s irq id\n");
		ret = -ENOENT;
		goto unregister_err;
	}

	ret = devm_request_irq(dev, info->irq[2], hisi_powerkey_handler,
			       IRQF_DISABLED, "hold 1s", info);
	if (ret < 0) {
		dev_err(dev, "failed to request hold 1s irq\n");
		ret = -ENOENT;
		goto unregister_err;
	}

	info->irq[3] = platform_get_irq_byname(pdev, "hold 8s");
	if (info->irq[3] >= 0) {
		ret = devm_request_irq(dev, info->irq[3], hisi_powerkey_handler,
				       IRQF_DISABLED, "hold 8s", info);
		if (ret < 0) {
			dev_err(dev, "failed to request hold 8s irq\n");
			ret = -ENOENT;
			goto unregister_err;
		}
	}

	info->irq[4] = platform_get_irq_byname(pdev, "hold 10s");
//.........这里部分代码省略.........