C++ devm_kzalloc函数代码示例

static int dw_spi_mmio_probe(struct platform_device *pdev)
{
	struct dw_spi_mmio *dwsmmio;
	struct dw_spi *dws;
	struct resource *mem;
	int ret;
	int num_cs;

	dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio),
			GFP_KERNEL);
	if (!dwsmmio)
		return -ENOMEM;

	dws = &dwsmmio->dws;

	/* Get basic io resource and map it */
	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	dws->regs = devm_ioremap_resource(&pdev->dev, mem);
	if (IS_ERR(dws->regs)) {
		dev_err(&pdev->dev, "SPI region map failed\n");
		return PTR_ERR(dws->regs);
	}

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

	dwsmmio->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(dwsmmio->clk))
		return PTR_ERR(dwsmmio->clk);
	ret = clk_prepare_enable(dwsmmio->clk);
	if (ret)
		return ret;

	dws->bus_num = pdev->id;

	dws->max_freq = clk_get_rate(dwsmmio->clk);

	device_property_read_u32(&pdev->dev, "reg-io-width", &dws->reg_io_width);

	num_cs = 4;

	device_property_read_u32(&pdev->dev, "num-cs", &num_cs);

	dws->num_cs = num_cs;

	if (pdev->dev.of_node) {
		int i;

		for (i = 0; i < dws->num_cs; i++) {
			int cs_gpio = of_get_named_gpio(pdev->dev.of_node,
					"cs-gpios", i);

			if (cs_gpio == -EPROBE_DEFER) {
				ret = cs_gpio;
				goto out;
			}

			if (gpio_is_valid(cs_gpio)) {
				ret = devm_gpio_request(&pdev->dev, cs_gpio,
						dev_name(&pdev->dev));
				if (ret)
					goto out;
			}
		}
	}

	ret = dw_spi_add_host(&pdev->dev, dws);
	if (ret)
		goto out;

	platform_set_drvdata(pdev, dwsmmio);
	return 0;

out:
	clk_disable_unprepare(dwsmmio->clk);
	return ret;
}

static int dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
{
	struct device *dev = glue->dev;
	struct platform_device *pdev = to_platform_device(dev);
	struct musb_hdrc_platform_data  *pdata = dev->platform_data;
	struct device_node *np = pdev->dev.of_node;
	struct musb_hdrc_config	*config;
	struct platform_device	*musb;
	struct resource *res;
	struct resource	resources[2];
	char res_name[11];
	int ret;

	resources[0].start = dsps_control_module_phys[id];
	resources[0].end = resources[0].start + SZ_4 - 1;
	resources[0].flags = IORESOURCE_MEM;

	glue->usb_ctrl[id] = devm_request_and_ioremap(&pdev->dev, resources);
	if (glue->usb_ctrl[id] == NULL) {
		dev_err(dev, "Failed to obtain usb_ctrl%d memory\n", id);
		ret = -ENODEV;
		goto err0;
	}

	/* first resource is for usbss, so start index from 1 */
	res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1);
	if (!res) {
		dev_err(dev, "failed to get memory for instance %d\n", id);
		ret = -ENODEV;
		goto err0;
	}
	res->parent = NULL;
	resources[0] = *res;

	/* first resource is for usbss, so start index from 1 */
	res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1);
	if (!res) {
		dev_err(dev, "failed to get irq for instance %d\n", id);
		ret = -ENODEV;
		goto err0;
	}
	res->parent = NULL;
	resources[1] = *res;
	resources[1].name = "mc";

	/* allocate the child platform device */
	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
	if (!musb) {
		dev_err(dev, "failed to allocate musb device\n");
		ret = -ENOMEM;
		goto err0;
	}

	musb->dev.parent		= dev;
	musb->dev.dma_mask		= &musb_dmamask;
	musb->dev.coherent_dma_mask	= musb_dmamask;

	glue->musb[id]			= musb;

	ret = platform_device_add_resources(musb, resources, 2);
	if (ret) {
		dev_err(dev, "failed to add resources\n");
		goto err2;
	}

	if (np) {
		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata) {
			dev_err(&pdev->dev,
				"failed to allocate musb platfrom data\n");
			ret = -ENOMEM;
			goto err2;
		}

		config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
		if (!config) {
			dev_err(&pdev->dev,
				"failed to allocate musb hdrc config\n");
			goto err2;
		}

		of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
		of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
		snprintf(res_name, sizeof(res_name), "port%d-mode", id);
		of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
		of_property_read_u32(np, "power", (u32 *)&pdata->power);
		config->multipoint = of_property_read_bool(np, "multipoint");

		pdata->config		= config;
	}

	pdata->platform_ops		= &dsps_ops;

	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	if (ret) {
		dev_err(dev, "failed to add platform_data\n");
		goto err2;
	}

	ret = platform_device_add(musb);
//.........这里部分代码省略.........

static int hx8357_probe(struct spi_device *spi)
{
	struct lcd_device *lcdev;
	struct hx8357_data *lcd;
	int i, ret;

	lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
	if (!lcd) {
		dev_err(&spi->dev, "Couldn't allocate lcd internal structure!\n");
		return -ENOMEM;
	}

	ret = spi_setup(spi);
	if (ret < 0) {
		dev_err(&spi->dev, "SPI setup failed.\n");
		return ret;
	}

	lcd->spi = spi;

	lcd->reset = of_get_named_gpio(spi->dev.of_node, "gpios-reset", 0);
	if (!gpio_is_valid(lcd->reset)) {
		dev_err(&spi->dev, "Missing dt property: gpios-reset\n");
		return -EINVAL;
	}

	ret = devm_gpio_request_one(&spi->dev, lcd->reset,
				    GPIOF_OUT_INIT_HIGH,
				    "hx8357-reset");
	if (ret) {
		dev_err(&spi->dev,
			"failed to request gpio %d: %d\n",
			lcd->reset, ret);
		return -EINVAL;
	}

	for (i = 0; i < HX8357_NUM_IM_PINS; i++) {
		lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node,
						"im-gpios", i);
		if (lcd->im_pins[i] == -EPROBE_DEFER) {
			dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n");
			return -EPROBE_DEFER;
		}
		if (!gpio_is_valid(lcd->im_pins[i])) {
			dev_err(&spi->dev, "Missing dt property: im-gpios\n");
			return -EINVAL;
		}

		ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i],
					GPIOF_OUT_INIT_LOW, "im_pins");
		if (ret) {
			dev_err(&spi->dev, "failed to request gpio %d: %d\n",
				lcd->im_pins[i], ret);
			return -EINVAL;
		}
	}

	lcdev = lcd_device_register("mxsfb", &spi->dev, lcd, &hx8357_ops);
	if (IS_ERR(lcdev)) {
		ret = PTR_ERR(lcdev);
		return ret;
	}
	spi_set_drvdata(spi, lcdev);

	ret = hx8357_lcd_init(lcdev);
	if (ret) {
		dev_err(&spi->dev, "Couldn't initialize panel\n");
		goto init_error;
	}

	dev_info(&spi->dev, "Panel probed\n");

	return 0;

init_error:
	lcd_device_unregister(lcdev);
	return ret;
}

static __devinit int max14688_probe (struct i2c_client *client,
    const struct i2c_device_id *id)
{
    struct max14688_platform_data *pdata = client->dev.platform_data;
    struct max14688 *me;
    u8 chip_id, chip_rev;
    int i, rc;
    u8 pincontrol2 = 0;

    log_dbg(MAX14688_NAME" attached\n");

    log_dbg("wake_lock_init\n");
    wake_lock_init(&ear_key_wake_lock, WAKE_LOCK_SUSPEND, "ear_key");

    me = kzalloc(sizeof(struct max14688), GFP_KERNEL);

    if (me == NULL) {
	    log_err("Failed to allloate headset per device info\n");
	    return -ENOMEM;
    }

    if (client->dev.of_node) {
	    pdata = devm_kzalloc(&client->dev, sizeof(struct max14688_platform_data), GFP_KERNEL);
	    if (unlikely(!pdata)) {
		    log_err("out of memory (%uB requested)\n", sizeof(struct max14688_platform_data));
		    return -ENOMEM;
	    }
	    client->dev.platform_data = pdata;

	    max14688_parse_dt(&client->dev, pdata);
    } else {
	    pdata = devm_kzalloc(&client->dev, sizeof(struct max14688_platform_data), GFP_KERNEL);
	    if (unlikely(!pdata)) {
		    log_err("out of memory (%uB requested)\n", sizeof(struct max14688_platform_data));
		    return -ENOMEM;
	    } else {
		    pdata = client->dev.platform_data;
	    }
    }

    i2c_set_clientdata(client, me);

    spin_lock_init(&me->irq_lock);
    mutex_init(&me->lock);
    me->dev  = &client->dev;
    me->kobj = &client->dev.kobj;
    me->irq  = -1;

    me->gpio_int = pdata->gpio_int;
    me->gpio_detect = pdata->gpio_detect;

    INIT_DELAYED_WORK(&me->irq_work, max14688_irq_work);
    INIT_DELAYED_WORK(&me->det_work, max14688_det_work);
#ifdef I2C_SUSPEND_WORKAROUND
    INIT_DELAYED_WORK(&me->check_suspended_work, max14688_check_suspended_worker);
#endif

    rc = gpio_request(me->gpio_detect, MAX14688_NAME"-detect");
    if (unlikely(rc)) {
	    return rc;
    }

    rc = gpio_direction_input(me->gpio_detect);
    if (rc < 0) {
	    log_err("Failed to configure gpio%d (me->gpio_detect) gpio_direction_input\n", me->gpio_detect);
	    gpio_free(me->gpio_detect);
	    return rc;
    }

    rc = gpio_request(me->gpio_int, MAX14688_NAME"-irq");
    if (unlikely(rc)) {
	    return rc;
    }

    rc = gpio_direction_input(me->gpio_int);
    if (rc < 0) {
	    log_err("Failed to configure gpio%d (me->gpio_int) gpio_direction_input\n", me->gpio_int);
	    gpio_free(me->gpio_int);
	    return rc;
    }

    me->irq = gpio_to_irq(me->gpio_int);

    /* Save jack lookup table given via platform data */
    me->jack_matches        = pdata->jack_matches;
    me->num_of_jack_matches = pdata->num_of_jack_matches;

    /* Save button lookup table given via platform data */
    me->button_matches        = pdata->button_matches;
    me->num_of_button_matches = pdata->num_of_button_matches;

    me->matched_jack   = -1;
    me->matched_button = -1;

    /* Platform-specific Calls */
    me->detect_jack = pdata->detect_jack;
    me->read_mic_impedence = pdata->read_mic_impedence;
    me->read_left_impedence = pdata->read_left_impedence;
    me->report_jack = pdata->report_jack;
    me->report_button = pdata->report_button;
//.........这里部分代码省略.........

static int amd_xgbe_phy_probe(struct phy_device *phydev)
{
	struct amd_xgbe_phy_priv *priv;
	struct platform_device *phy_pdev;
	struct device *dev, *phy_dev;
	unsigned int phy_resnum, phy_irqnum;
	int ret;

	if (!phydev->bus || !phydev->bus->parent)
		return -EINVAL;

	dev = phydev->bus->parent;

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

	priv->pdev = to_platform_device(dev);
	priv->adev = ACPI_COMPANION(dev);
	priv->dev = dev;
	priv->phydev = phydev;
	mutex_init(&priv->an_mutex);
	INIT_WORK(&priv->an_irq_work, amd_xgbe_an_irq_work);
	INIT_WORK(&priv->an_work, amd_xgbe_an_state_machine);

	if (!priv->adev || acpi_disabled) {
		struct device_node *bus_node;
		struct device_node *phy_node;

		bus_node = priv->dev->of_node;
		phy_node = of_parse_phandle(bus_node, "phy-handle", 0);
		if (!phy_node) {
			dev_err(dev, "unable to parse phy-handle\n");
			ret = -EINVAL;
			goto err_priv;
		}

		phy_pdev = of_find_device_by_node(phy_node);
		of_node_put(phy_node);

		if (!phy_pdev) {
			dev_err(dev, "unable to obtain phy device\n");
			ret = -EINVAL;
			goto err_priv;
		}

		phy_resnum = 0;
		phy_irqnum = 0;
	} else {
		/* In ACPI, the XGBE and PHY resources are the grouped
		 * together with the PHY resources at the end
		 */
		phy_pdev = priv->pdev;
		phy_resnum = amd_xgbe_phy_resource_count(phy_pdev,
							 IORESOURCE_MEM) - 3;
		phy_irqnum = amd_xgbe_phy_resource_count(phy_pdev,
							 IORESOURCE_IRQ) - 1;
	}
	phy_dev = &phy_pdev->dev;

	/* Get the device mmio areas */
	priv->rxtx_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
					       phy_resnum++);
	priv->rxtx_regs = devm_ioremap_resource(dev, priv->rxtx_res);
	if (IS_ERR(priv->rxtx_regs)) {
		dev_err(dev, "rxtx ioremap failed\n");
		ret = PTR_ERR(priv->rxtx_regs);
		goto err_put;
	}

	priv->sir0_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
					       phy_resnum++);
	priv->sir0_regs = devm_ioremap_resource(dev, priv->sir0_res);
	if (IS_ERR(priv->sir0_regs)) {
		dev_err(dev, "sir0 ioremap failed\n");
		ret = PTR_ERR(priv->sir0_regs);
		goto err_rxtx;
	}

	priv->sir1_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
					       phy_resnum++);
	priv->sir1_regs = devm_ioremap_resource(dev, priv->sir1_res);
	if (IS_ERR(priv->sir1_regs)) {
		dev_err(dev, "sir1 ioremap failed\n");
		ret = PTR_ERR(priv->sir1_regs);
		goto err_sir0;
	}

	/* Get the auto-negotiation interrupt */
	ret = platform_get_irq(phy_pdev, phy_irqnum);
	if (ret < 0) {
		dev_err(dev, "platform_get_irq failed\n");
		goto err_sir1;
	}
	priv->an_irq = ret;

	/* Get the device speed set property */
	ret = device_property_read_u32(phy_dev, XGBE_PHY_SPEEDSET_PROPERTY,
				       &priv->speed_set);
	if (ret) {
//.........这里部分代码省略.........

static int twl6030_usb_probe(struct platform_device *pdev)
{
	u32 ret;
	struct twl6030_usb	*twl;
	int			status, err;
	struct device_node	*np = pdev->dev.of_node;
	struct device		*dev = &pdev->dev;
	struct twl4030_usb_data	*pdata = dev_get_platdata(dev);

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

	twl->dev		= &pdev->dev;
	twl->irq1		= platform_get_irq(pdev, 0);
	twl->irq2		= platform_get_irq(pdev, 1);
	twl->linkstat		= MUSB_UNKNOWN;

	twl->comparator.set_vbus	= twl6030_set_vbus;
	twl->comparator.start_srp	= twl6030_start_srp;

	ret = omap_usb2_set_comparator(&twl->comparator);
	if (ret == -ENODEV) {
		dev_info(&pdev->dev, "phy not ready, deferring probe");
		return -EPROBE_DEFER;
	}

	if (np) {
		twl->regulator = "usb";
	} else if (pdata) {
		if (pdata->features & TWL6032_SUBCLASS)
			twl->regulator = "ldousb";
		else
			twl->regulator = "vusb";
	} else {
		dev_err(&pdev->dev, "twl6030 initialized without pdata\n");
		return -EINVAL;
	}

	/* init spinlock for workqueue */
	spin_lock_init(&twl->lock);

	err = twl6030_usb_ldo_init(twl);
	if (err) {
		dev_err(&pdev->dev, "ldo init failed\n");
		return err;
	}

	platform_set_drvdata(pdev, twl);
	if (device_create_file(&pdev->dev, &dev_attr_vbus))
		dev_warn(&pdev->dev, "could not create sysfs file\n");

	INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work);

	status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
			"twl6030_usb", twl);
	if (status < 0) {
		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
			twl->irq1, status);
		device_remove_file(twl->dev, &dev_attr_vbus);
		return status;
	}

	status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq,
			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT,
			"twl6030_usb", twl);
	if (status < 0) {
		dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
			twl->irq2, status);
		free_irq(twl->irq1, twl);
		device_remove_file(twl->dev, &dev_attr_vbus);
		return status;
	}

	twl->asleep = 0;
	twl6030_enable_irq(twl);
	dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");

	return 0;
}

static int pwm_backlight_probe(struct platform_device *pdev)
{
	struct backlight_properties props;
	struct platform_pwm_backlight_data *data = NULL;
	struct backlight_device *bl;
	struct pwm_bl_data *pb;
	const char *pwm_request_label = NULL;
	int ret;
	int bl_delay_on = 0;
	printk("[BACKLIGHT] %s : %d\n", __func__, __LINE__);
	if (pdev->dev.platform_data)
		data = pdev->dev.platform_data;

	else if (pdev->dev.of_node) {
		u32 val;
		data = kzalloc(sizeof(struct platform_pwm_backlight_data),
				GFP_KERNEL);
		if (!data)
			return -ENOMEM;

		if (of_property_read_u32(pdev->dev.of_node, "pwm-id", &val)) {
			ret = -EINVAL;
			goto err_read;
		}
		data->pwm_id = val;

		if (of_property_read_u32(pdev->dev.of_node,
				"max-brightness", &val)) {
			ret = -EINVAL;
			goto err_read;
		}
		data->max_brightness = val;

		if (of_property_read_u32(pdev->dev.of_node,
				"dft-brightness", &val)) {
			ret = -EINVAL;
			goto err_read;
		}
		data->dft_brightness = val;

		if (of_property_read_u32(pdev->dev.of_node,
				"polarity", &val)) {
			ret = -EINVAL;
			goto err_read;
		}
		data->polarity = val;

		if (of_property_read_u32(pdev->dev.of_node,
				"pwm-period-ns", &val)) {
			ret = -EINVAL;
			goto err_read;
		}
		data->pwm_period_ns = val;

		if (of_property_read_string(pdev->dev.of_node,
			"pwm-request-label", &pwm_request_label)) {
			ret = -EINVAL;
			goto err_read;
		}

		if (of_property_read_u32(pdev->dev.of_node,
				"bl-on-delay", &val)) {
			bl_delay_on = 0;
		} else
			bl_delay_on = val;

		if (of_property_read_u32(pdev->dev.of_node,
				"pwm_pin_name", &val)) {
			pwm_pin = -1;
		} else
			pwm_pin = val;

		if (of_property_read_u32(pdev->dev.of_node,
				"pwm_pin_reboot_func", &val)) {
			pwm_pin_reboot_func = -1;
		} else
			pwm_pin_reboot_func = val;

		pdev->dev.platform_data = data;

	}
	if (!data) {
		dev_err(&pdev->dev, "failed to find platform data\n");
		return -EINVAL;
	}

	if (data->init) {
		ret = data->init(&pdev->dev);
		if (ret < 0)
			return ret;
	}

	pb = devm_kzalloc(&pdev->dev, sizeof(*pb), GFP_KERNEL);
	if (!pb) {
		dev_err(&pdev->dev, "no memory for state\n");
		ret = -ENOMEM;
		goto err_alloc;
	}

	pb->period = data->pwm_period_ns;
//.........这里部分代码省略.........

static int stm_probe(struct amba_device *adev, const struct amba_id *id)
{
	int ret;
	void __iomem *base;
	unsigned long *guaranteed;
	struct device *dev = &adev->dev;
	struct coresight_platform_data *pdata = NULL;
	struct stm_drvdata *drvdata;
	struct resource *res = &adev->res;
	struct resource ch_res;
	size_t res_size, bitmap_size;
	struct coresight_desc desc = { 0 };
	struct device_node *np = adev->dev.of_node;

	if (np) {
		pdata = of_get_coresight_platform_data(dev, np);
		if (IS_ERR(pdata))
			return PTR_ERR(pdata);
		adev->dev.platform_data = pdata;
	}
	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
	if (!drvdata)
		return -ENOMEM;

	drvdata->dev = &adev->dev;
	drvdata->atclk = devm_clk_get(&adev->dev, "atclk"); /* optional */
	if (!IS_ERR(drvdata->atclk)) {
		ret = clk_prepare_enable(drvdata->atclk);
		if (ret)
			return ret;
	}
	dev_set_drvdata(dev, drvdata);

	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);
	drvdata->base = base;

	ret = stm_get_resource_byname(np, "stm-stimulus-base", &ch_res);
	if (ret)
		return ret;
	drvdata->chs.phys = ch_res.start;

	base = devm_ioremap_resource(dev, &ch_res);
	if (IS_ERR(base))
		return PTR_ERR(base);
	drvdata->chs.base = base;

	drvdata->write_bytes = stm_fundamental_data_size(drvdata);

	if (boot_nr_channel) {
		drvdata->numsp = boot_nr_channel;
		res_size = min((resource_size_t)(boot_nr_channel *
				  BYTES_PER_CHANNEL), resource_size(res));
	} else {
		drvdata->numsp = stm_num_stimulus_port(drvdata);
		res_size = min((resource_size_t)(drvdata->numsp *
				 BYTES_PER_CHANNEL), resource_size(res));
	}
	bitmap_size = BITS_TO_LONGS(drvdata->numsp) * sizeof(long);

	guaranteed = devm_kzalloc(dev, bitmap_size, GFP_KERNEL);
	if (!guaranteed)
		return -ENOMEM;
	drvdata->chs.guaranteed = guaranteed;

	spin_lock_init(&drvdata->spinlock);

	stm_init_default_data(drvdata);
	stm_init_generic_data(drvdata);

	if (stm_register_device(dev, &drvdata->stm, THIS_MODULE)) {
		dev_info(dev,
			 "stm_register_device failed, probing deferred\n");
		return -EPROBE_DEFER;
	}

	desc.type = CORESIGHT_DEV_TYPE_SOURCE;
	desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE;
	desc.ops = &stm_cs_ops;
	desc.pdata = pdata;
	desc.dev = dev;
	desc.groups = coresight_stm_groups;
	drvdata->csdev = coresight_register(&desc);
	if (IS_ERR(drvdata->csdev)) {
		ret = PTR_ERR(drvdata->csdev);
		goto stm_unregister;
	}

	pm_runtime_put(&adev->dev);

	dev_info(dev, "%s initialized\n", (char *)id->data);
	return 0;

stm_unregister:
	stm_unregister_device(&drvdata->stm);
	return ret;
}

static int dwc3_probe(struct platform_device *pdev)
{
	struct device		*dev = &pdev->dev;
	struct dwc3_platform_data *pdata = dev_get_platdata(dev);
	struct device_node	*node = dev->of_node;
	struct resource		*res;
	struct dwc3		*dwc;

	int			ret = -ENOMEM;

	void __iomem		*regs;
	void			*mem;

	mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
	if (!mem) {
		dev_err(dev, "not enough memory\n");
		return -ENOMEM;
	}
	dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
	dwc->mem = mem;

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
		dev_err(dev, "missing IRQ\n");
		return -ENODEV;
	}
	dwc->xhci_resources[1].start = res->start;
	dwc->xhci_resources[1].end = res->end;
	dwc->xhci_resources[1].flags = res->flags;
	dwc->xhci_resources[1].name = res->name;

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

	if (node) {
		dwc->maximum_speed = of_usb_get_maximum_speed(node);

		dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
		dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);

		dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
		dwc->dr_mode = of_usb_get_dr_mode(node);
	} else if (pdata) {
		dwc->maximum_speed = pdata->maximum_speed;

		dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
		dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);

		dwc->needs_fifo_resize = pdata->tx_fifo_resize;
		dwc->dr_mode = pdata->dr_mode;
	} else {
		dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
		dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
	}

	/* default to superspeed if no maximum_speed passed */
	if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
		dwc->maximum_speed = USB_SPEED_SUPER;

	if (IS_ERR(dwc->usb2_phy)) {
		ret = PTR_ERR(dwc->usb2_phy);

		/*
		 * if -ENXIO is returned, it means PHY layer wasn't
		 * enabled, so it makes no sense to return -EPROBE_DEFER
		 * in that case, since no PHY driver will ever probe.
		 */
		if (ret == -ENXIO)
			return ret;

		dev_err(dev, "no usb2 phy configured\n");
		return -EPROBE_DEFER;
	}

	if (IS_ERR(dwc->usb3_phy)) {
		ret = PTR_ERR(dwc->usb3_phy);

		/*
		 * if -ENXIO is returned, it means PHY layer wasn't
		 * enabled, so it makes no sense to return -EPROBE_DEFER
		 * in that case, since no PHY driver will ever probe.
		 */
		if (ret == -ENXIO)
			return ret;

		dev_err(dev, "no usb3 phy configured\n");
		return -EPROBE_DEFER;
	}

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

	res->start += DWC3_GLOBALS_REGS_START;

//.........这里部分代码省略.........

static int tegra_camera_probe(struct platform_device *pdev)
{
	int err;
	struct tegra_camera_dev *dev;

	dev_info(&pdev->dev, "%s\n", __func__);
	dev = devm_kzalloc(&pdev->dev, sizeof(struct tegra_camera_dev),
			GFP_KERNEL);
	if (!dev) {
		err = -ENOMEM;
		dev_err(&pdev->dev, "%s: unable to allocate memory\n",
			__func__);
		goto alloc_err;
	}

#if defined(CONFIG_ARCH_ACER_T20)
	t20_dev = dev;
#elif defined(CONFIG_ARCH_ACER_T30)
	t30_dev = dev;
#endif

	mutex_init(&dev->tegra_camera_lock);

	/* Powergate VE when boot */
	mutex_lock(&dev->tegra_camera_lock);
	dev->power_refcnt = 0;
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
	err = tegra_powergate_partition(TEGRA_POWERGATE_VENC);
	if (err)
		dev_err(&pdev->dev, "%s: powergate failed.\n", __func__);
#endif
	mutex_unlock(&dev->tegra_camera_lock);

	dev->dev = &pdev->dev;

	/* Get regulator pointer */
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
	dev->reg = regulator_get(&pdev->dev, "vcsi");
#else
	dev->reg = regulator_get(&pdev->dev, "avdd_dsi_csi");
#endif
	if (IS_ERR_OR_NULL(dev->reg)) {
		dev_err(&pdev->dev, "%s: couldn't get regulator\n", __func__);
		return PTR_ERR(dev->reg);
	}

	dev->misc_dev.minor = MISC_DYNAMIC_MINOR;
	dev->misc_dev.name = TEGRA_CAMERA_NAME;
	dev->misc_dev.fops = &tegra_camera_fops;
	dev->misc_dev.parent = &pdev->dev;

	err = misc_register(&dev->misc_dev);
	if (err) {
		dev_err(&pdev->dev, "%s: Unable to register misc device!\n",
		       TEGRA_CAMERA_NAME);
		goto misc_register_err;
	}

	err = tegra_camera_clk_get(pdev, "isp", &dev->isp_clk);
	if (err)
		goto misc_register_err;
	err = tegra_camera_clk_get(pdev, "vi", &dev->vi_clk);
	if (err)
		goto vi_clk_get_err;
	err = tegra_camera_clk_get(pdev, "vi_sensor", &dev->vi_sensor_clk);
	if (err)
		goto vi_sensor_clk_get_err;
	err = tegra_camera_clk_get(pdev, "csus", &dev->csus_clk);
	if (err)
		goto csus_clk_get_err;
	err = tegra_camera_clk_get(pdev, "csi", &dev->csi_clk);
	if (err)
		goto csi_clk_get_err;

	/* dev is set in order to restore in _remove */
	platform_set_drvdata(pdev, dev);

	return 0;

csi_clk_get_err:
	clk_put(dev->csus_clk);
csus_clk_get_err:
	clk_put(dev->vi_sensor_clk);
vi_sensor_clk_get_err:
	clk_put(dev->vi_clk);
vi_clk_get_err:
	clk_put(dev->isp_clk);
misc_register_err:
	regulator_put(dev->reg);
alloc_err:
	return err;
}

static int aspeed_vuart_probe(struct platform_device *pdev)
{
	struct uart_8250_port port;
	struct aspeed_vuart *vuart;
	struct device_node *np;
	struct resource *res;
	u32 clk, prop;
	int rc;

	np = pdev->dev.of_node;

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

	vuart->dev = &pdev->dev;

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

	memset(&port, 0, sizeof(port));
	port.port.private_data = vuart;
	port.port.membase = vuart->regs;
	port.port.mapbase = res->start;
	port.port.mapsize = resource_size(res);
	port.port.startup = aspeed_vuart_startup;
	port.port.shutdown = aspeed_vuart_shutdown;
	port.port.dev = &pdev->dev;

	rc = sysfs_create_group(&vuart->dev->kobj, &aspeed_vuart_attr_group);
	if (rc < 0)
		return rc;

	if (of_property_read_u32(np, "clock-frequency", &clk)) {
		vuart->clk = devm_clk_get(&pdev->dev, NULL);
		if (IS_ERR(vuart->clk)) {
			dev_warn(&pdev->dev,
				"clk or clock-frequency not defined\n");
			rc = PTR_ERR(vuart->clk);
			goto err_sysfs_remove;
		}

		rc = clk_prepare_enable(vuart->clk);
		if (rc < 0)
			goto err_sysfs_remove;

		clk = clk_get_rate(vuart->clk);
	}

	/* If current-speed was set, then try not to change it. */
	if (of_property_read_u32(np, "current-speed", &prop) == 0)
		port.port.custom_divisor = clk / (16 * prop);

	/* Check for shifted address mapping */
	if (of_property_read_u32(np, "reg-offset", &prop) == 0)
		port.port.mapbase += prop;

	/* Check for registers offset within the devices address range */
	if (of_property_read_u32(np, "reg-shift", &prop) == 0)
		port.port.regshift = prop;

	/* Check for fifo size */
	if (of_property_read_u32(np, "fifo-size", &prop) == 0)
		port.port.fifosize = prop;

	/* Check for a fixed line number */
	rc = of_alias_get_id(np, "serial");
	if (rc >= 0)
		port.port.line = rc;

	port.port.irq = irq_of_parse_and_map(np, 0);
	port.port.irqflags = IRQF_SHARED;
	port.port.iotype = UPIO_MEM;
	port.port.type = PORT_16550A;
	port.port.uartclk = clk;
	port.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF
		| UPF_FIXED_PORT | UPF_FIXED_TYPE | UPF_NO_THRE_TEST;

	if (of_property_read_bool(np, "no-loopback-test"))
		port.port.flags |= UPF_SKIP_TEST;

	if (port.port.fifosize)
		port.capabilities = UART_CAP_FIFO;

	if (of_property_read_bool(np, "auto-flow-control"))
		port.capabilities |= UART_CAP_AFE;

	rc = serial8250_register_8250_port(&port);
	if (rc < 0)
		goto err_clk_disable;

	vuart->line = rc;

	aspeed_vuart_set_enabled(vuart, true);
	aspeed_vuart_set_host_tx_discard(vuart, true);
	platform_set_drvdata(pdev, vuart);

	return 0;
//.........这里部分代码省略.........

static int sh_pfc_probe(struct platform_device *pdev)
{
	const struct platform_device_id *platid = platform_get_device_id(pdev);
#ifdef CONFIG_OF
	struct device_node *np = pdev->dev.of_node;
#endif
	const struct sh_pfc_soc_info *info;
	struct sh_pfc *pfc;
	int ret;

#ifdef CONFIG_OF
	if (np)
		info = of_device_get_match_data(&pdev->dev);
	else
#endif
		info = platid ? (const void *)platid->driver_data : NULL;

	if (info == NULL)
		return -ENODEV;

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

	pfc->info = info;
	pfc->dev = &pdev->dev;

	ret = sh_pfc_map_resources(pfc, pdev);
	if (unlikely(ret < 0))
		return ret;

	spin_lock_init(&pfc->lock);

	if (info->ops && info->ops->init) {
		ret = info->ops->init(pfc);
		if (ret < 0)
			return ret;
	}

	pinctrl_provide_dummies();

	ret = sh_pfc_init_ranges(pfc);
	if (ret < 0)
		return ret;

	/*
	 * Initialize pinctrl bindings first
	 */
	ret = sh_pfc_register_pinctrl(pfc);
	if (unlikely(ret != 0))
		return ret;

#ifdef CONFIG_PINCTRL_SH_PFC_GPIO
	/*
	 * Then the GPIO chip
	 */
	ret = sh_pfc_register_gpiochip(pfc);
	if (unlikely(ret != 0)) {
		/*
		 * If the GPIO chip fails to come up we still leave the
		 * PFC state as it is, given that there are already
		 * extant users of it that have succeeded by this point.
		 */
		dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n");
	}
#endif

	platform_set_drvdata(pdev, pfc);

	dev_info(pfc->dev, "%s support registered\n", info->name);

	return 0;
}

static int sh_pfc_map_resources(struct sh_pfc *pfc,
				struct platform_device *pdev)
{
	unsigned int num_windows, num_irqs;
	struct sh_pfc_window *windows;
	unsigned int *irqs = NULL;
	struct resource *res;
	unsigned int i;
	int irq;

	/* Count the MEM and IRQ resources. */
	for (num_windows = 0;; num_windows++) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, num_windows);
		if (!res)
			break;
	}
	for (num_irqs = 0;; num_irqs++) {
		irq = platform_get_irq(pdev, num_irqs);
		if (irq == -EPROBE_DEFER)
			return irq;
		if (irq < 0)
			break;
	}

	if (num_windows == 0)
		return -EINVAL;

	/* Allocate memory windows and IRQs arrays. */
	windows = devm_kzalloc(pfc->dev, num_windows * sizeof(*windows),
			       GFP_KERNEL);
	if (windows == NULL)
		return -ENOMEM;

	pfc->num_windows = num_windows;
	pfc->windows = windows;

	if (num_irqs) {
		irqs = devm_kzalloc(pfc->dev, num_irqs * sizeof(*irqs),
				    GFP_KERNEL);
		if (irqs == NULL)
			return -ENOMEM;

		pfc->num_irqs = num_irqs;
		pfc->irqs = irqs;
	}

	/* Fill them. */
	for (i = 0; i < num_windows; i++) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
		windows->phys = res->start;
		windows->size = resource_size(res);
		windows->virt = devm_ioremap_resource(pfc->dev, res);
		if (IS_ERR(windows->virt))
			return -ENOMEM;
		windows++;
	}
	for (i = 0; i < num_irqs; i++)
		*irqs++ = platform_get_irq(pdev, i);

	return 0;
}

static int spdif_probe(struct platform_device *pdev)
{
	/*struct device_node *spdif_np = pdev->dev.of_node;*/
	struct resource *memregion;
	struct resource *mem_res;
	struct rockchip_spdif_info *spdif;
	int ret;

	RK_SPDIF_DBG("Entered %s\n", __func__);

	spdif = devm_kzalloc(&pdev->dev, sizeof(
		struct rockchip_spdif_info), GFP_KERNEL);
	if (!spdif) {
		dev_err(&pdev->dev, "Can't allocate spdif info\n");
		return -ENOMEM;
	}
	platform_set_drvdata(pdev, spdif);

	spin_lock_init(&spdif->lock);

	/* get spdif register regoin. */
	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!mem_res) {
		dev_err(&pdev->dev, "No memory resource\n");
		ret = -ENOENT;
		goto err_;
	}
	memregion = devm_request_mem_region(&pdev->
			dev, mem_res->start,
			resource_size(mem_res), "rockchip-spdif");
	if (!memregion) {
		dev_err(&pdev->dev, "Memory region already claimed\n");
		ret = -EBUSY;
		goto err_;
	}
	spdif->regs = devm_ioremap(&pdev->dev, memregion->
			start, resource_size(memregion));
	if (!spdif->regs) {
		dev_err(&pdev->dev, "ioremap failed\n");
		ret = -ENOMEM;
		goto err_;
	}

	/* get spdif clock and init. */
	spdif->hclk = devm_clk_get(&pdev->dev, "spdif_hclk");
	if (IS_ERR(spdif->hclk)) {
		dev_err(&pdev->dev, "Can't retrieve spdif hclock\n");
		spdif->hclk = NULL;
	}
	clk_prepare_enable(spdif->hclk);

	/* get spdif clock and init. */
	spdif->clk = devm_clk_get(&pdev->dev, "spdif_mclk");
	if (IS_ERR(spdif->clk)) {
		dev_err(&pdev->dev, "Can't retrieve spdif clock\n");
		ret = -ENOMEM;
		goto err_;
	}
	clk_set_rate(spdif->clk, 12288000);
	clk_set_rate(spdif->clk, 11289600);
	clk_prepare_enable(spdif->clk);

	spdif->dma_playback.addr = mem_res->start + DATA_OUTBUF;
	spdif->dma_playback.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
	spdif->dma_playback.maxburst = 4;

	/* set dev name to driver->name for sound card register */
	dev_set_name(&pdev->dev, "%s", pdev->dev.driver->name);

	ret = snd_soc_register_component(&pdev->
		dev, &rockchip_spdif_component,	&rockchip_spdif_dai, 1);
	if (ret) {
		dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
		ret = -ENOMEM;
		goto err_;
	}

	ret = rockchip_pcm_platform_register(&pdev->dev);
	if (ret) {
		dev_err(&pdev->dev, "Could not register PCM: %d\n", ret);
		goto err_;
	}

	RK_SPDIF_DBG("spdif:spdif probe ok!\n");

	return 0;

err_:
	platform_set_drvdata(pdev, NULL);

	return ret;
}

static int __devinit max8973_probe(struct i2c_client *client,
				     const struct i2c_device_id *id)
{
	struct max8973_regulator_platform_data *pdata;
	struct regulator_dev *rdev;
	struct max8973_chip *max;
	int ret;

	pdata = client->dev.platform_data;
	if (!pdata) {
		dev_err(&client->dev, "%s(): No Platform data", __func__);
		return -EIO;
	}

	max = devm_kzalloc(&client->dev, sizeof(*max), GFP_KERNEL);
	if (!max) {
		dev_err(&client->dev, "%s(): Memory allocation failed\n",
						__func__);
		return -ENOMEM;
	}

	max->dev = &client->dev;

	max->desc.name = id->name;
	max->desc.id = 0;
	max->desc.ops = &max8973_dcdc_ops;
	max->desc.type = REGULATOR_VOLTAGE;
	max->desc.owner = THIS_MODULE;
	max->regmap = devm_regmap_init_i2c(client, &max8973_regmap_config);
	if (IS_ERR(max->regmap)) {
		ret = PTR_ERR(max->regmap);
		dev_err(&client->dev,
			"%s(): regmap allocation failed with err %d\n",
			__func__, ret);
		return ret;
	}
	i2c_set_clientdata(client, max);

	max->enable_external_control = pdata->enable_ext_control;
	max->dvs_gpio = pdata->dvs_gpio;
	max->curr_gpio_val = pdata->dvs_def_state;
	max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
	max->lru_index[0] = max->curr_vout_reg;
	max->valid_dvs_gpio = false;

	if (gpio_is_valid(max->dvs_gpio)) {
		int gpio_flags;
		int i;

		gpio_flags = (pdata->dvs_def_state) ?
				GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
		ret = gpio_request_one(max->dvs_gpio,
				gpio_flags, "max8973-dvs");
		if (ret) {
			dev_err(&client->dev,
				"%s(): Could not obtain dvs GPIO %d: %d\n",
				__func__, max->dvs_gpio, ret);
			return ret;
		}
		max->valid_dvs_gpio = true;

		/*
		 * Initialize the lru index with vout_reg id
		 * The index 0 will be most recently used and
		 * set with the max->curr_vout_reg */
		for (i = 0; i < MAX8973_MAX_VOUT_REG; ++i)
			max->lru_index[i] = i;
		max->lru_index[0] = max->curr_vout_reg;
		max->lru_index[max->curr_vout_reg] = 0;
	}

	ret = max8973_init_dcdc(max, pdata);
	if (ret < 0) {
		dev_err(max->dev, "%s(): Init failed with err = %d\n",
				__func__, ret);
		goto err_init;
	}

	/* Register the regulators */
	rdev = regulator_register(&max->desc, &client->dev,
			pdata->reg_init_data, max, NULL);
	if (IS_ERR(rdev)) {
		dev_err(max->dev,
			"%s(): regulator register failed with err %s\n",
			__func__, id->name);
		ret = PTR_ERR(rdev);
		goto err_init;
	}

	max->rdev = rdev;
	return 0;

err_init:
	if (gpio_is_valid(max->dvs_gpio))
		gpio_free(max->dvs_gpio);
	return ret;
}