/**
 * zynq_gpio_probe - Initialization method for a zynq_gpio device
 * @pdev:	platform device instance
 *
 * This function allocates memory resources for the gpio device and registers
 * all the banks of the device. It will also set up interrupts for the gpio
 * pins.
 * Note: Interrupts are disabled for all the banks during initialization.
 *
 * Return: 0 on success, negative error otherwise.
 */
static int zynq_gpio_probe(struct platform_device *pdev)
{
	int ret, pin_num, bank_num, gpio_irq;
	unsigned int irq_num;
	struct zynq_gpio *gpio;
	struct gpio_chip *chip;
	struct resource *res;

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

	platform_set_drvdata(pdev, gpio);

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

	irq_num = platform_get_irq(pdev, 0);
	gpio->irq = irq_num;

	/* configure the gpio chip */
	chip = &gpio->chip;
	chip->label = "zynq_gpio";
	chip->owner = THIS_MODULE;
	chip->dev = &pdev->dev;
	chip->get = zynq_gpio_get_value;
	chip->set = zynq_gpio_set_value;
	chip->request = zynq_gpio_request;
	chip->free = zynq_gpio_free;
	chip->direction_input = zynq_gpio_dir_in;
	chip->direction_output = zynq_gpio_dir_out;
	chip->to_irq = zynq_gpio_to_irq;
	chip->dbg_show = NULL;
	chip->base = 0;		/* default pin base */
	chip->ngpio = ZYNQ_GPIO_NR_GPIOS;
	chip->can_sleep = 0;

	gpio->irq_base = irq_alloc_descs(-1, 0, chip->ngpio, 0);
	if (gpio->irq_base < 0) {
		dev_err(&pdev->dev, "Couldn't allocate IRQ numbers\n");
		return -ENODEV;
	}

	irq_domain = irq_domain_add_legacy(pdev->dev.of_node,
					   chip->ngpio, gpio->irq_base, 0,
					   &irq_domain_simple_ops, NULL);

	/* report a bug if gpio chip registration fails */
	ret = gpiochip_add(chip);
	if (ret < 0)
		return ret;

	/* Enable GPIO clock */
	gpio->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(gpio->clk)) {
		dev_err(&pdev->dev, "input clock not found.\n");
		if (gpiochip_remove(chip))
			dev_err(&pdev->dev, "Failed to remove gpio chip\n");
		return PTR_ERR(gpio->clk);
	}
	ret = clk_prepare_enable(gpio->clk);
	if (ret) {
		dev_err(&pdev->dev, "Unable to enable clock.\n");
		if (gpiochip_remove(chip))
			dev_err(&pdev->dev, "Failed to remove gpio chip\n");
		return ret;
	}

	/* disable interrupts for all banks */
	for (bank_num = 0; bank_num < ZYNQ_GPIO_MAX_BANK; bank_num++) {
		zynq_gpio_writereg(gpio->base_addr +
				   ZYNQ_GPIO_INTDIS_OFFSET(bank_num),
				   ZYNQ_GPIO_IXR_DISABLE_ALL);
	}

	/*
	 * set the irq chip, handler and irq chip data for callbacks for
	 * each pin
	 */
	for (pin_num = 0; pin_num < min_t(int, ZYNQ_GPIO_NR_GPIOS,
					  (int)chip->ngpio); pin_num++) {
		gpio_irq = irq_find_mapping(irq_domain, pin_num);
		irq_set_chip_and_handler(gpio_irq, &zynq_gpio_irqchip,
					 handle_simple_irq);
		irq_set_chip_data(gpio_irq, (void *)gpio);
		set_irq_flags(gpio_irq, IRQF_VALID);
	}
//.........这里部分代码省略.........

static int xiic_i2c_probe(struct platform_device *pdev)
{
	struct xiic_i2c *i2c;
	struct xiic_i2c_platform_data *pdata;
	struct resource *res;
	int ret, irq;
	u8 i;
	u32 sr;

	i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
	if (!i2c)
		return -ENOMEM;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	i2c->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(i2c->base))
		return PTR_ERR(i2c->base);

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

	pdata = dev_get_platdata(&pdev->dev);

	/* hook up driver to tree */
	platform_set_drvdata(pdev, i2c);
	i2c->adap = xiic_adapter;
	i2c_set_adapdata(&i2c->adap, i2c);
	i2c->adap.dev.parent = &pdev->dev;
	i2c->adap.dev.of_node = pdev->dev.of_node;

	mutex_init(&i2c->lock);
	init_waitqueue_head(&i2c->wait);

	ret = devm_request_threaded_irq(&pdev->dev, irq, xiic_isr,
					xiic_process, IRQF_ONESHOT,
					pdev->name, i2c);

	if (ret < 0) {
		dev_err(&pdev->dev, "Cannot claim IRQ\n");
		return ret;
	}

	/*
	 * Detect endianness
	 * Try to reset the TX FIFO. Then check the EMPTY flag. If it is not
	 * set, assume that the endianness was wrong and swap.
	 */
	i2c->endianness = LITTLE;
	xiic_setreg32(i2c, XIIC_CR_REG_OFFSET, XIIC_CR_TX_FIFO_RESET_MASK);
	/* Reset is cleared in xiic_reinit */
	sr = xiic_getreg32(i2c, XIIC_SR_REG_OFFSET);
	if (!(sr & XIIC_SR_TX_FIFO_EMPTY_MASK))
		i2c->endianness = BIG;

	xiic_reinit(i2c);

	/* add i2c adapter to i2c tree */
	ret = i2c_add_adapter(&i2c->adap);
	if (ret) {
		dev_err(&pdev->dev, "Failed to add adapter\n");
		xiic_deinit(i2c);
		return ret;
	}

	if (pdata) {
		/* add in known devices to the bus */
		for (i = 0; i < pdata->num_devices; i++)
			i2c_new_device(&i2c->adap, pdata->devices + i);
	}

	return 0;
}

/*
 * This function is called during the driver binding process.
 * This function requests for memory, initializes net_device structure and
 * registers with kernel.
 *
 * @param   pdev  the device structure used to store device specific
 *                information that is used by the suspend, resume and remove
 *                functions
 *
 * @return  The function returns 0 on success and a non-zero value on failure
 */
static int mxc_irda_probe(struct platform_device *pdev)
{
	struct net_device *dev;
	struct mxc_irda *si;
	struct resource *uart_res;
	unsigned int baudrate_mask;
	int uart_irq;
	int err;

	uart_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	uart_irq = platform_get_irq(pdev, 0);
	if (!uart_res || uart_irq == NO_IRQ) {
		dev_err(&pdev->dev, "Unable to find resources\n");
		return -ENXIO;
	}

	if (!request_mem_region(uart_res->start,
				uart_res->end - uart_res->start +1,
				pdev->name)) {
		dev_err(&pdev->dev, "Unable to request resource\n");
		return -ENOMEM;
	}
	mxcirda_debug("UART base: %x, IRQ: %d", uart_res->start, uart_irq);

	dev = alloc_irdadev(sizeof(struct mxc_irda));
	if (!dev) {
		dev_err(&pdev->dev, "Failed to request memory region\n");
		err = -ENOMEM;
		goto err_mem_1;
	}

	si = netdev_priv(dev);
	si->dev = &pdev->dev;
	si->uart_res = uart_res;
	si->uart_irq = uart_irq;

	si->uart_base = (void *)IO_ADDRESS(uart_res->start);
	if (!(si->uart_base)) {
		dev_err(&pdev->dev, "Failed to remap memory region\n");
		err = -ENOMEM;
		goto err_mem_2;
	}

	/*
	 * Initialise the SIR buffers
	 */
	err = mxc_irda_init_iobuf(&si->rx_buff, UART_BUFF_SIZE);
	if (err) {
		dev_err(&pdev->dev, "Failed to request memory for rx buffer\n");
		goto err_mem_2;
	}

	err = mxc_irda_init_iobuf(&si->tx_buff, UART_BUFF_SIZE);
	if (err) {
		dev_err(&pdev->dev, "Failed to request memory for tx buffer\n");
		goto err_mem_3;
	}

	dev->hard_start_xmit	= mxc_irda_hard_xmit;
	dev->open		= mxc_irda_start;
	dev->stop		= mxc_irda_stop;
	dev->do_ioctl		= mxc_irda_ioctl;
	dev->get_stats		= mxc_irda_stats;
	dev->irq		= uart_irq;

	irda_init_max_qos_capabilies(&si->qos);

	/*
	 * We support
	 * SIR(9600, 19200,38400, 57600 and 115200 bps)
	 * Min Turn Time set to 1ms or greater.
	 */
	baudrate_mask = IR_9600;
	switch (max_rate) {
		case 4000000:	baudrate_mask |= IR_4000000 << 8;
		case 1152000:	baudrate_mask |= IR_1152000;
		case 576000:	baudrate_mask |= IR_576000;
		case 115200:	baudrate_mask |= IR_115200;
		case 57600:	baudrate_mask |= IR_57600;
		case 38400:	baudrate_mask |= IR_38400;
		case 19200:	baudrate_mask |= IR_19200;
	}
	si->qos.baud_rate.bits &= baudrate_mask;
	si->qos.min_turn_time.bits = 0x7;
	irda_qos_bits_to_value(&si->qos);

	err = register_netdev(dev);
	if (err == 0) {
		printk("%s: is found on a MXC IrDA\n", dev->name);
//.........这里部分代码省略.........

static int __init coh901327_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	int ret;
	u16 val;
	struct resource *res;

	parent = dev;

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

	clk = clk_get(dev, NULL);
	if (IS_ERR(clk)) {
		ret = PTR_ERR(clk);
		dev_err(dev, "could not get clock\n");
		return ret;
	}
	ret = clk_prepare_enable(clk);
	if (ret) {
		dev_err(dev, "could not prepare and enable clock\n");
		goto out_no_clk_enable;
	}

	val = readw(virtbase + U300_WDOG_SR);
	switch (val) {
	case U300_WDOG_SR_STATUS_TIMED_OUT:
		dev_info(dev, "watchdog timed out since last chip reset!\n");
		coh901327_wdt.bootstatus |= WDIOF_CARDRESET;
		/* Status will be cleared below */
		break;
	case U300_WDOG_SR_STATUS_NORMAL:
		dev_info(dev, "in normal status, no timeouts have occurred.\n");
		break;
	default:
		dev_info(dev, "contains an illegal status code (%08x)\n", val);
		break;
	}

	val = readw(virtbase + U300_WDOG_D2R);
	switch (val) {
	case U300_WDOG_D2R_DISABLE_STATUS_DISABLED:
		dev_info(dev, "currently disabled.\n");
		break;
	case U300_WDOG_D2R_DISABLE_STATUS_ENABLED:
		dev_info(dev, "currently enabled! (disabling it now)\n");
		coh901327_disable();
		break;
	default:
		dev_err(dev, "contains an illegal enable/disable code (%08x)\n",
			val);
		break;
	}

	/* Reset the watchdog */
	writew(U300_WDOG_SR_RESET_STATUS_RESET, virtbase + U300_WDOG_SR);

	irq = platform_get_irq(pdev, 0);
	if (request_irq(irq, coh901327_interrupt, 0,
			DRV_NAME " Bark", pdev)) {
		ret = -EIO;
		goto out_no_irq;
	}

	watchdog_init_timeout(&coh901327_wdt, margin, dev);

	coh901327_wdt.parent = dev;
	ret = watchdog_register_device(&coh901327_wdt);
	if (ret)
		goto out_no_wdog;

	dev_info(dev, "initialized. (timeout=%d sec)\n",
			coh901327_wdt.timeout);
	return 0;

out_no_wdog:
	free_irq(irq, pdev);
out_no_irq:
	clk_disable_unprepare(clk);
out_no_clk_enable:
	clk_put(clk);
	return ret;
}

static int tahvo_usb_probe(struct platform_device *pdev)
{
	struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
	struct tahvo_usb *tu;
	int ret;

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

	tu->phy.otg = devm_kzalloc(&pdev->dev, sizeof(*tu->phy.otg),
				   GFP_KERNEL);
	if (!tu->phy.otg)
		return -ENOMEM;

	tu->pt_dev = pdev;

	/* Default mode */
#ifdef CONFIG_TAHVO_USB_HOST_BY_DEFAULT
	tu->tahvo_mode = TAHVO_MODE_HOST;
#else
	tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
#endif

	mutex_init(&tu->serialize);

	tu->ick = devm_clk_get(&pdev->dev, "usb_l4_ick");
	if (!IS_ERR(tu->ick))
		clk_enable(tu->ick);

	/*
	 * Set initial state, so that we generate kevents only on state changes.
	 */
	tu->vbus_state = retu_read(rdev, TAHVO_REG_IDSR) & TAHVO_STAT_VBUS;

	tu->extcon.name = DRIVER_NAME;
	tu->extcon.supported_cable = tahvo_cable;
	tu->extcon.dev.parent = &pdev->dev;

	ret = extcon_dev_register(&tu->extcon);
	if (ret) {
		dev_err(&pdev->dev, "could not register extcon device: %d\n",
			ret);
		goto err_disable_clk;
	}

	/* Set the initial cable state. */
	extcon_set_cable_state(&tu->extcon, "USB-HOST",
			       tu->tahvo_mode == TAHVO_MODE_HOST);
	extcon_set_cable_state(&tu->extcon, "USB", tu->vbus_state);

	/* Create OTG interface */
	tahvo_usb_power_off(tu);
	tu->phy.dev = &pdev->dev;
	tu->phy.otg->state = OTG_STATE_UNDEFINED;
	tu->phy.label = DRIVER_NAME;
	tu->phy.set_suspend = tahvo_usb_set_suspend;

	tu->phy.otg->phy = &tu->phy;
	tu->phy.otg->set_host = tahvo_usb_set_host;
	tu->phy.otg->set_peripheral = tahvo_usb_set_peripheral;

	ret = usb_add_phy(&tu->phy, USB_PHY_TYPE_USB2);
	if (ret < 0) {
		dev_err(&pdev->dev, "cannot register USB transceiver: %d\n",
			ret);
		goto err_extcon_unreg;
	}

	dev_set_drvdata(&pdev->dev, tu);

	tu->irq = platform_get_irq(pdev, 0);
	ret = request_threaded_irq(tu->irq, NULL, tahvo_usb_vbus_interrupt, 0,
				   "tahvo-vbus", tu);
	if (ret) {
		dev_err(&pdev->dev, "could not register tahvo-vbus irq: %d\n",
			ret);
		goto err_remove_phy;
	}

	/* Attributes */
	ret = sysfs_create_group(&pdev->dev.kobj, &tahvo_attr_group);
	if (ret) {
		dev_err(&pdev->dev, "cannot create sysfs group: %d\n", ret);
		goto err_free_irq;
	}

	return 0;

err_free_irq:
	free_irq(tu->irq, tu);
err_remove_phy:
	usb_remove_phy(&tu->phy);
err_extcon_unreg:
	extcon_dev_unregister(&tu->extcon);
err_disable_clk:
	if (!IS_ERR(tu->ick))
		clk_disable(tu->ick);

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

static int img_ir_probe(struct platform_device *pdev)
{
	struct img_ir_priv *priv;
	struct resource *res_regs;
	int irq, error, error2;

	/* Get resources from platform device */
	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "cannot find IRQ resource\n");
		return irq;
	}

	/* Private driver data */
	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&pdev->dev, "cannot allocate device data\n");
		return -ENOMEM;
	}
	platform_set_drvdata(pdev, priv);
	priv->dev = &pdev->dev;
	spin_lock_init(&priv->lock);

	/* Ioremap the registers */
	res_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	priv->reg_base = devm_ioremap_resource(&pdev->dev, res_regs);
	if (IS_ERR(priv->reg_base))
		return PTR_ERR(priv->reg_base);

	/* Get core clock */
	priv->clk = devm_clk_get(&pdev->dev, "core");
	if (IS_ERR(priv->clk))
		dev_warn(&pdev->dev, "cannot get core clock resource\n");

	/* Get sys clock */
	priv->sys_clk = devm_clk_get(&pdev->dev, "sys");
	if (IS_ERR(priv->sys_clk))
		dev_warn(&pdev->dev, "cannot get sys clock resource\n");
	/*
	 * Enabling the system clock before the register interface is
	 * accessed. ISR shouldn't get called with Sys Clock disabled,
	 * hence exiting probe with an error.
	 */
	if (!IS_ERR(priv->sys_clk)) {
		error = clk_prepare_enable(priv->sys_clk);
		if (error) {
			dev_err(&pdev->dev, "cannot enable sys clock\n");
			return error;
		}
	}

	/* Set up raw & hw decoder */
	error = img_ir_probe_raw(priv);
	error2 = img_ir_probe_hw(priv);
	if (error && error2) {
		if (error == -ENODEV)
			error = error2;
		goto err_probe;
	}

	/* Get the IRQ */
	priv->irq = irq;
	error = request_irq(priv->irq, img_ir_isr, 0, "img-ir", priv);
	if (error) {
		dev_err(&pdev->dev, "cannot register IRQ %u\n",
			priv->irq);
		error = -EIO;
		goto err_irq;
	}

	img_ir_ident(priv);
	img_ir_setup(priv);

	return 0;

err_irq:
	img_ir_remove_hw(priv);
	img_ir_remove_raw(priv);
err_probe:
	if (!IS_ERR(priv->sys_clk))
		clk_disable_unprepare(priv->sys_clk);
	return error;
}

/**
 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it
 * through the hotplug entry's driver_data.
 *
 */
int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
{
	int retval, irq;
	struct usb_hcd *hcd;
	struct pxaohci_platform_data *inf;
	struct pxa27x_ohci *ohci;
	struct resource *r;
	struct clk *usb_clk;

	inf = pdev->dev.platform_data;

	if (!inf)
		return -ENODEV;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		pr_err("no resource of IORESOURCE_IRQ");
		return -ENXIO;
	}

	usb_clk = clk_get(&pdev->dev, NULL);
	if (IS_ERR(usb_clk))
		return PTR_ERR(usb_clk);

	hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
	if (!hcd)
		return -ENOMEM;

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r) {
		pr_err("no resource of IORESOURCE_MEM");
		retval = -ENXIO;
		goto err1;
	}

	hcd->rsrc_start = r->start;
	hcd->rsrc_len = resource_size(r);

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		pr_debug("request_mem_region failed");
		retval = -EBUSY;
		goto err1;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		pr_debug("ioremap failed");
		retval = -ENOMEM;
		goto err2;
	}

	/* initialize "struct pxa27x_ohci" */
	ohci = (struct pxa27x_ohci *)hcd_to_ohci(hcd);
	ohci->dev = &pdev->dev;
	ohci->clk = usb_clk;
	ohci->mmio_base = (void __iomem *)hcd->regs;

	if ((retval = pxa27x_start_hc(ohci, &pdev->dev)) < 0) {
		pr_debug("pxa27x_start_hc failed");
		goto err3;
	}

	/* Select Power Management Mode */
	pxa27x_ohci_select_pmm(ohci, inf->port_mode);

	if (inf->power_budget)
		hcd->power_budget = inf->power_budget;

	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
	if (retval == 0)
		return retval;

	pxa27x_stop_hc(ohci, &pdev->dev);
 err3:
	iounmap(hcd->regs);
 err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
	usb_put_hcd(hcd);
	clk_put(usb_clk);
	return retval;
}

static int do_pd_setup(struct fs_enet_private *fep)
{
#ifdef CONFIG_PPC_CPM_NEW_BINDING
	struct of_device *ofdev = to_of_device(fep->dev);
	struct fs_platform_info *fpi = fep->fpi;
	int ret = -EINVAL;

	fep->interrupt = of_irq_to_resource(ofdev->node, 0, NULL);
	if (fep->interrupt == NO_IRQ)
		goto out;

	fep->fcc.fccp = of_iomap(ofdev->node, 0);
	if (!fep->fcc.fccp)
		goto out;

	fep->fcc.ep = of_iomap(ofdev->node, 1);
	if (!fep->fcc.ep)
		goto out_fccp;

	fep->fcc.fcccp = of_iomap(ofdev->node, 2);
	if (!fep->fcc.fcccp)
		goto out_ep;

	fep->fcc.mem = (void __iomem *)cpm2_immr;
	fpi->dpram_offset = cpm_dpalloc(128, 8);
	if (IS_ERR_VALUE(fpi->dpram_offset)) {
		ret = fpi->dpram_offset;
		goto out_fcccp;
	}

	return 0;

out_fcccp:
	iounmap(fep->fcc.fcccp);
out_ep:
	iounmap(fep->fcc.ep);
out_fccp:
	iounmap(fep->fcc.fccp);
out:
	return ret;
#else
	struct platform_device *pdev = to_platform_device(fep->dev);
	struct resource *r;

	/* Fill out IRQ field */
	fep->interrupt = platform_get_irq(pdev, 0);
	if (fep->interrupt < 0)
		return -EINVAL;

	/* Attach the memory for the FCC Parameter RAM */
	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_pram");
	fep->fcc.ep = ioremap(r->start, r->end - r->start + 1);
	if (fep->fcc.ep == NULL)
		return -EINVAL;

	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_regs");
	fep->fcc.fccp = ioremap(r->start, r->end - r->start + 1);
	if (fep->fcc.fccp == NULL)
		return -EINVAL;

	if (fep->fpi->fcc_regs_c) {
		fep->fcc.fcccp = (void __iomem *)fep->fpi->fcc_regs_c;
	} else {
		r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
				"fcc_regs_c");
		fep->fcc.fcccp = ioremap(r->start,
				r->end - r->start + 1);
	}

	if (fep->fcc.fcccp == NULL)
		return -EINVAL;

	fep->fcc.mem = (void __iomem *)fep->fpi->mem_offset;
	if (fep->fcc.mem == NULL)
		return -EINVAL;

	return 0;
#endif
}

static int parport_ax88796_probe(struct platform_device *pdev)
{
	struct device *_dev = &pdev->dev;
	struct ax_drvdata *dd;
	struct parport *pp = NULL;
	struct resource *res;
	unsigned long size;
	int spacing;
	int irq;
	int ret;

	dd = kzalloc(sizeof(struct ax_drvdata), GFP_KERNEL);
	if (dd == NULL) {
		dev_err(_dev, "no memory for private data\n");
		return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(_dev, "no MEM specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	size = resource_size(res);
	spacing = size / 3;

	dd->io = request_mem_region(res->start, size, pdev->name);
	if (dd->io == NULL) {
		dev_err(_dev, "cannot reserve memory\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	dd->base = ioremap(res->start, size);
	if (dd->base == NULL) {
		dev_err(_dev, "cannot ioremap region\n");
		ret = -ENXIO;
		goto exit_res;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq <= 0)
		irq = PARPORT_IRQ_NONE;

	pp = parport_register_port((unsigned long)dd->base, irq,
				   PARPORT_DMA_NONE,
				   &parport_ax88796_ops);

	if (pp == NULL) {
		dev_err(_dev, "failed to register parallel port\n");
		ret = -ENOMEM;
		goto exit_unmap;
	}

	pp->private_data = dd;
	dd->parport = pp;
	dd->dev = _dev;

	dd->spp_data = dd->base;
	dd->spp_spr  = dd->base + (spacing * 1);
	dd->spp_cpr  = dd->base + (spacing * 2);

	/* initialise the port controls */
	writeb(AX_CPR_STRB, dd->spp_cpr);

	if (irq >= 0) {
		/* request irq */
		ret = request_irq(irq, parport_irq_handler,
				  IRQF_TRIGGER_FALLING, pdev->name, pp);

		if (ret < 0)
			goto exit_port;

		dd->irq_enabled = 1;
	}

	platform_set_drvdata(pdev, pp);

	dev_info(_dev, "attached parallel port driver\n");
	parport_announce_port(pp);

	return 0;

 exit_port:
	parport_remove_port(pp);
 exit_unmap:
	iounmap(dd->base);
 exit_res:
	release_resource(dd->io);
	kfree(dd->io);
 exit_mem:
	kfree(dd);
	return ret;
}

static int sbsa_gwdt_probe(struct platform_device *pdev)
{
	void __iomem *rf_base, *cf_base;
	struct device *dev = &pdev->dev;
	struct watchdog_device *wdd;
	struct sbsa_gwdt *gwdt;
	struct resource *res;
	int ret, irq;
	u32 status;

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

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

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	rf_base = devm_ioremap_resource(dev, res);
	if (IS_ERR(rf_base))
		return PTR_ERR(rf_base);

	/*
	 * Get the frequency of system counter from the cp15 interface of ARM
	 * Generic timer. We don't need to check it, because if it returns "0",
	 * system would panic in very early stage.
	 */
	gwdt->clk = arch_timer_get_cntfrq();
	gwdt->refresh_base = rf_base;
	gwdt->control_base = cf_base;

	wdd = &gwdt->wdd;
	wdd->parent = dev;
	wdd->info = &sbsa_gwdt_info;
	wdd->ops = &sbsa_gwdt_ops;
	wdd->min_timeout = 1;
	wdd->max_hw_heartbeat_ms = U32_MAX / gwdt->clk * 1000;
	wdd->timeout = DEFAULT_TIMEOUT;
	watchdog_set_drvdata(wdd, gwdt);
	watchdog_set_nowayout(wdd, nowayout);

	status = readl(cf_base + SBSA_GWDT_WCS);
	if (status & SBSA_GWDT_WCS_WS1) {
		dev_warn(dev, "System reset by WDT.\n");
		wdd->bootstatus |= WDIOF_CARDRESET;
	}
	if (status & SBSA_GWDT_WCS_EN)
		set_bit(WDOG_HW_RUNNING, &wdd->status);

	if (action) {
		irq = platform_get_irq(pdev, 0);
		if (irq < 0) {
			action = 0;
			dev_warn(dev, "unable to get ws0 interrupt.\n");
		} else {
			/*
			 * In case there is a pending ws0 interrupt, just ping
			 * the watchdog before registering the interrupt routine
			 */
			writel(0, rf_base + SBSA_GWDT_WRR);
			if (devm_request_irq(dev, irq, sbsa_gwdt_interrupt, 0,
					     pdev->name, gwdt)) {
				action = 0;
				dev_warn(dev, "unable to request IRQ %d.\n",
					 irq);
			}
		}
		if (!action)
			dev_warn(dev, "falling back to single stage mode.\n");
	}
	/*
	 * In the single stage mode, The first signal (WS0) is ignored,
	 * the timeout is (WOR * 2), so the maximum timeout should be doubled.
	 */
	if (!action)
		wdd->max_hw_heartbeat_ms *= 2;

	watchdog_init_timeout(wdd, timeout, dev);
	/*
	 * Update timeout to WOR.
	 * Because of the explicit watchdog refresh mechanism,
	 * it's also a ping, if watchdog is enabled.
	 */
	sbsa_gwdt_set_timeout(wdd, wdd->timeout);

	ret = watchdog_register_device(wdd);
	if (ret)
		return ret;

	dev_info(dev, "Initialized with %ds timeout @ %u Hz, action=%d.%s\n",
		 wdd->timeout, gwdt->clk, action,
		 status & SBSA_GWDT_WCS_EN ? " [enabled]" : "");

	return 0;
}

static int wakeup_event_thread(void *param)
{
	struct wakeup_ctrl *ctrl = (struct wakeup_ctrl *)param;
	struct sched_param sch_param = {.sched_priority = 1};
	u32 timeout = 0;

	sched_setscheduler(current, SCHED_RR, &sch_param);
	while (1) {
		wait_for_completion_interruptible(&ctrl->event);
		if (ctrl->thread_close) {
			while (!kthread_should_stop() && (timeout < 1000)) {
				timeout++;
				msleep(1);
			}
			break;
		}
		wakeup_event_handler(ctrl);
		enable_irq(ctrl->wakeup_irq);
		if ((ctrl->usb_irq > 0) && (ctrl->wakeup_irq != ctrl->usb_irq))
			enable_irq(ctrl->usb_irq);
	}
	return 0;
}

static int wakeup_dev_probe(struct platform_device *pdev)
{
	struct fsl_usb2_wakeup_platform_data *pdata;
	struct wakeup_ctrl *ctrl = NULL;
	int status;
	unsigned long interrupt_flag;

	printk(KERN_INFO "IMX usb wakeup probe\n");

	if (!pdev || !pdev->dev.platform_data)
		return -ENODEV;
	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
	if (!ctrl)
		return -ENOMEM;
	pdata = pdev->dev.platform_data;
	ctrl->pdata = pdata;
	init_waitqueue_head(&pdata->wq);
	pdata->usb_wakeup_is_pending = false;

	init_completion(&ctrl->event);
	/* Currently, both mx5x and mx6q uses usb controller's irq
	 * as wakeup irq.
	 */
	ctrl->wakeup_irq = platform_get_irq(pdev, 1);
	ctrl->usb_irq = platform_get_irq(pdev, 1);
	ctrl->thread_close = false;
	if (ctrl->wakeup_irq != ctrl->usb_irq)
		interrupt_flag = IRQF_DISABLED;
	else
		interrupt_flag = IRQF_SHARED;
	status = request_irq(ctrl->wakeup_irq, usb_wakeup_handler, interrupt_flag, "usb_wakeup", (void *)ctrl);
	if (status)
		goto error1;

	ctrl->thread = kthread_run(wakeup_event_thread, (void *)ctrl, "usb_wakeup thread");
	status = IS_ERR(ctrl->thread) ? -1 : 0;
	if (status)
		goto error2;
	platform_set_drvdata(pdev, ctrl);

	printk(KERN_DEBUG "the wakeup pdata is 0x%p\n", pdata);
	return 0;
error2:
	free_irq(ctrl->wakeup_irq, (void *)ctrl);
error1:
	kfree(ctrl);
	return status;
}

static int  wakeup_dev_exit(struct platform_device *pdev)
{
	struct wakeup_ctrl *wctrl = platform_get_drvdata(pdev);

	wctrl->thread_close = true;
	complete(&wctrl->event);
	kthread_stop(wctrl->thread);
	free_irq(wctrl->wakeup_irq, (void *)wctrl);
	kfree(wctrl);

	return 0;
}
static struct platform_driver wakeup_d = {
	.probe   = wakeup_dev_probe,
	.remove  = wakeup_dev_exit,
	.driver = {
		.name = "usb-wakeup",
	},
};

static int __init wakeup_dev_init(void)
{
	return platform_driver_register(&wakeup_d);
}
static void __exit wakeup_dev_uninit(void)
{
	platform_driver_unregister(&wakeup_d);
//.........这里部分代码省略.........

static int tsc_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct tsc_data *ts;
	int error = 0;
	u32 rev = 0;

	ts = kzalloc(sizeof(struct tsc_data), GFP_KERNEL);
	if (!ts) {
		dev_err(dev, "cannot allocate device info\n");
		return -ENOMEM;
	}

	ts->dev = dev;
	spin_lock_init(&ts->lock);
	setup_timer(&ts->timer, tsc_poll, (unsigned long)ts);
	platform_set_drvdata(pdev, ts);

	ts->tsc_irq = platform_get_irq(pdev, 0);
	if (ts->tsc_irq < 0) {
		dev_err(dev, "cannot determine device interrupt\n");
		error = -ENODEV;
		goto error_res;
	}

	ts->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!ts->res) {
		dev_err(dev, "cannot determine register area\n");
		error = -ENODEV;
		goto error_res;
	}

	if (!request_mem_region(ts->res->start, resource_size(ts->res),
				pdev->name)) {
		dev_err(dev, "cannot claim register memory\n");
		ts->res = NULL;
		error = -EINVAL;
		goto error_res;
	}

	ts->regs = ioremap(ts->res->start, resource_size(ts->res));
	if (!ts->regs) {
		dev_err(dev, "cannot map register memory\n");
		error = -ENOMEM;
		goto error_map;
	}

	ts->clk = clk_get(dev, NULL);
	if (IS_ERR(ts->clk)) {
		dev_err(dev, "cannot claim device clock\n");
		error = PTR_ERR(ts->clk);
		goto error_clk;
	}

	error = request_threaded_irq(ts->tsc_irq, NULL, tsc_irq, IRQF_ONESHOT,
				     dev_name(dev), ts);
	if (error < 0) {
		dev_err(ts->dev, "Could not allocate ts irq\n");
		goto error_irq;
	}

	ts->input_dev = input_allocate_device();
	if (!ts->input_dev) {
		dev_err(dev, "cannot allocate input device\n");
		error = -ENOMEM;
		goto error_input;
	}
	input_set_drvdata(ts->input_dev, ts);

	ts->input_dev->name       = pdev->name;
	ts->input_dev->id.bustype = BUS_HOST;
	ts->input_dev->dev.parent = &pdev->dev;
	ts->input_dev->open	  = tsc_start;
	ts->input_dev->close	  = tsc_stop;

	clk_enable(ts->clk);
	rev = tsc_read(ts, rev);
	ts->input_dev->id.product = ((rev >>  8) & 0x07);
	ts->input_dev->id.version = ((rev >> 16) & 0xfff);
	clk_disable(ts->clk);

	__set_bit(EV_KEY,    ts->input_dev->evbit);
	__set_bit(EV_ABS,    ts->input_dev->evbit);
	__set_bit(BTN_TOUCH, ts->input_dev->keybit);

	input_set_abs_params(ts->input_dev, ABS_X, 0, 0xffff, 5, 0);
	input_set_abs_params(ts->input_dev, ABS_Y, 0, 0xffff, 5, 0);
	input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 4095, 128, 0);

	error = input_register_device(ts->input_dev);
	if (error < 0) {
		dev_err(dev, "failed input device registration\n");
		goto error_reg;
	}

	return 0;

error_reg:
	input_free_device(ts->input_dev);
error_input:
//.........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 i, ret;

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

	bus = mdiobus_alloc_size(sizeof(struct orion_mdio_dev));
	if (!bus) {
		dev_err(&pdev->dev, "Cannot allocate MDIO bus\n");
		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;

	bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (!bus->irq) {
		mdiobus_free(bus);
		return -ENOMEM;
	}

	for (i = 0; i < PHY_MAX_ADDR; i++)
		bus->irq[i] = PHY_POLL;

	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);
	kfree(bus->irq);
	mdiobus_free(bus);
	return ret;
}

static int __init msm_serial_probe(struct platform_device *pdev)
{
	struct msm_port *msm_port;
	struct resource *resource;
	struct uart_port *port;
	int irq;
#ifdef CONFIG_SERIAL_MSM_RX_WAKEUP
	struct msm_serial_platform_data *pdata = pdev->dev.platform_data;
#endif

	if (unlikely(pdev->id < 0 || pdev->id >= UART_NR))
		return -ENXIO;

	printk(KERN_INFO "msm_serial: detected port #%d\n", pdev->id);

	port = get_port_from_line(pdev->id);
	port->dev = &pdev->dev;
	msm_port = UART_TO_MSM(port);

	msm_port->clk = clk_get(&pdev->dev, "uart_clk");
	if (unlikely(IS_ERR(msm_port->clk)))
		return PTR_ERR(msm_port->clk);
	port->uartclk = clk_get_rate(msm_port->clk);

// BEGIN 0010274: [email protected] 2010-10-27
// Fixed a problem that system don't go to sleep mode.
#if defined(CONFIG_MACH_LGE_BRYCE)
	if(uart_det_flag){
		clk_enable(msm_port->clk);
		msm_uart_driver.cons = NULL;
	}
#endif	
// END 0010274: [email protected] 2010-10-27

	resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (unlikely(!resource))
		return -ENXIO;
	port->mapbase = resource->start;

	irq = platform_get_irq(pdev, 0);
	if (unlikely(irq < 0))
		return -ENXIO;
	port->irq = irq;

	platform_set_drvdata(pdev, port);

	if (unlikely(set_irq_wake(port->irq, 1)))
		return -ENXIO;

#ifdef CONFIG_SERIAL_MSM_RX_WAKEUP
	if (pdata == NULL)
		msm_port->wakeup.irq = -1;
	else {
		msm_port->wakeup.irq = pdata->wakeup_irq;
		msm_port->wakeup.ignore = 1;
		msm_port->wakeup.inject_rx = pdata->inject_rx_on_wakeup;
		msm_port->wakeup.rx_to_inject = pdata->rx_to_inject;

		if (unlikely(msm_port->wakeup.irq <= 0))
			return -EINVAL;
	}
#endif

#ifdef CONFIG_SERIAL_MSM_CLOCK_CONTROL
	msm_port->clk_state = MSM_CLK_PORT_OFF;
	hrtimer_init(&msm_port->clk_off_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	msm_port->clk_off_timer.function = msm_serial_clock_off;
	msm_port->clk_off_delay = ktime_set(0, 1000000);  /* 1 ms */
#endif

	pm_runtime_enable(port->dev);
	return uart_add_one_port(&msm_uart_driver, port);
}

static int __devinit imx_keypad_probe(struct platform_device *pdev)
{
	const struct matrix_keymap_data *keymap_data = pdev->dev.platform_data;
	struct imx_keypad *keypad;
	struct input_dev *input_dev;
	struct resource *res;
	int irq, error, i;

	if (keymap_data == NULL) {
		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 -EINVAL;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no I/O memory defined in platform data\n");
		return -EINVAL;
	}

	res = request_mem_region(res->start, resource_size(res), pdev->name);
	if (res == NULL) {
		dev_err(&pdev->dev, "failed to request I/O memory\n");
		return -EBUSY;
	}

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

	keypad = kzalloc(sizeof(struct imx_keypad), GFP_KERNEL);
	if (!keypad) {
		dev_err(&pdev->dev, "not enough memory for driver data\n");
		error = -ENOMEM;
		goto failed_free_input;
	}

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

	setup_timer(&keypad->check_matrix_timer,
		    imx_keypad_check_for_events, (unsigned long) keypad);

	keypad->mmio_base = ioremap(res->start, resource_size(res));
	if (keypad->mmio_base == NULL) {
		dev_err(&pdev->dev, "failed to remap I/O memory\n");
		error = -ENOMEM;
		goto failed_free_priv;
	}

	keypad->clk = clk_get(&pdev->dev, "kpp");
	if (IS_ERR(keypad->clk)) {
		dev_err(&pdev->dev, "failed to get keypad clock\n");
		error = PTR_ERR(keypad->clk);
		goto failed_unmap;
	}

	/* Search for rows and cols enabled */
	for (i = 0; i < keymap_data->keymap_size; i++) {
		keypad->rows_en_mask |= 1 << KEY_ROW(keymap_data->keymap[i]);
		keypad->cols_en_mask |= 1 << KEY_COL(keymap_data->keymap[i]);
	}

	if (keypad->rows_en_mask > ((1 << MAX_MATRIX_KEY_ROWS) - 1) ||
	   keypad->cols_en_mask > ((1 << MAX_MATRIX_KEY_COLS) - 1)) {
		dev_err(&pdev->dev,
			"invalid key data (too many rows or colums)\n");
		error = -EINVAL;
		goto failed_clock_put;
	}
	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);

	/* 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;

	/* Should not set BIT_MASK(EV_REP) to evbit[0] when some keys(like
	   power key) in keypad don't require to repeat, otherwise it will
	   auto repeat the key event if long press those keys. The disadvantage
	   is all keys in keypad, will not auto repeat when long pressed, but it
	   should be acceptable to remove the EV_REP flag*/
	input_dev->evbit[0] = BIT_MASK(EV_KEY);
	input_dev->keycode = keypad->keycodes;
	input_dev->keycodesize = sizeof(keypad->keycodes[0]);
	input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);

	matrix_keypad_build_keymap(keymap_data, MATRIX_ROW_SHIFT,
//.........这里部分代码省略.........

static int tb10x_gpio_probe(struct platform_device *pdev)
{
    struct tb10x_gpio *tb10x_gpio;
    struct resource *mem;
    struct device_node *dn = pdev->dev.of_node;
    int ret = -EBUSY;
    u32 ngpio;

    if (!dn)
        return -EINVAL;

    if (of_property_read_u32(dn, "abilis,ngpio", &ngpio))
        return -EINVAL;

    mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    if (!mem) {
        dev_err(&pdev->dev, "No memory resource defined.\n");
        return -EINVAL;
    }

    tb10x_gpio = devm_kzalloc(&pdev->dev, sizeof(*tb10x_gpio), GFP_KERNEL);
    if (tb10x_gpio == NULL)
        return -ENOMEM;

    spin_lock_init(&tb10x_gpio->spinlock);

    tb10x_gpio->base = devm_ioremap_resource(&pdev->dev, mem);
    if (IS_ERR(tb10x_gpio->base))
        return PTR_ERR(tb10x_gpio->base);

    tb10x_gpio->gc.label		= of_node_full_name(dn);
    tb10x_gpio->gc.dev		= &pdev->dev;
    tb10x_gpio->gc.owner		= THIS_MODULE;
    tb10x_gpio->gc.direction_input	= tb10x_gpio_direction_in;
    tb10x_gpio->gc.get		= tb10x_gpio_get;
    tb10x_gpio->gc.direction_output	= tb10x_gpio_direction_out;
    tb10x_gpio->gc.set		= tb10x_gpio_set;
    tb10x_gpio->gc.request		= tb10x_gpio_request;
    tb10x_gpio->gc.free		= tb10x_gpio_free;
    tb10x_gpio->gc.base		= -1;
    tb10x_gpio->gc.ngpio		= ngpio;
    tb10x_gpio->gc.can_sleep	= false;


    ret = gpiochip_add(&tb10x_gpio->gc);
    if (ret < 0) {
        dev_err(&pdev->dev, "Could not add gpiochip.\n");
        goto fail_gpiochip_registration;
    }

    platform_set_drvdata(pdev, tb10x_gpio);

    if (of_find_property(dn, "interrupt-controller", NULL)) {
        struct irq_chip_generic *gc;

        ret = platform_get_irq(pdev, 0);
        if (ret < 0) {
            dev_err(&pdev->dev, "No interrupt specified.\n");
            goto fail_get_irq;
        }

        tb10x_gpio->gc.to_irq	= tb10x_gpio_to_irq;
        tb10x_gpio->irq		= ret;

        ret = devm_request_irq(&pdev->dev, ret, tb10x_gpio_irq_cascade,
                               IRQF_TRIGGER_NONE | IRQF_SHARED,
                               dev_name(&pdev->dev), tb10x_gpio);
        if (ret != 0)
            goto fail_request_irq;

        tb10x_gpio->domain = irq_domain_add_linear(dn,
                             tb10x_gpio->gc.ngpio,
                             &irq_generic_chip_ops, NULL);
        if (!tb10x_gpio->domain) {
            ret = -ENOMEM;
            goto fail_irq_domain;
        }

        ret = irq_alloc_domain_generic_chips(tb10x_gpio->domain,
                                             tb10x_gpio->gc.ngpio, 1, tb10x_gpio->gc.label,
                                             handle_edge_irq, IRQ_NOREQUEST, IRQ_NOPROBE,
                                             IRQ_GC_INIT_MASK_CACHE);
        if (ret)
            goto fail_irq_domain;

        gc = tb10x_gpio->domain->gc->gc[0];
        gc->reg_base                         = tb10x_gpio->base;
        gc->chip_types[0].type               = IRQ_TYPE_EDGE_BOTH;
        gc->chip_types[0].chip.irq_ack       = irq_gc_ack_set_bit;
        gc->chip_types[0].chip.irq_mask      = irq_gc_mask_clr_bit;
        gc->chip_types[0].chip.irq_unmask    = irq_gc_mask_set_bit;
        gc->chip_types[0].chip.irq_set_type  = tb10x_gpio_irq_set_type;
        gc->chip_types[0].regs.ack           = OFFSET_TO_REG_CHANGE;
        gc->chip_types[0].regs.mask          = OFFSET_TO_REG_INT_EN;
    }

    return 0;

fail_irq_domain:
fail_request_irq:
//.........这里部分代码省略.........