C++ (Cpp) ttl_setup_device Examples

Example #1

File: gpio-janz-ttl.c Project: 020gzh/linux

static int ttl_probe(struct platform_device *pdev)
{
	struct janz_platform_data *pdata;
	struct device *dev = &pdev->dev;
	struct ttl_module *mod;
	struct gpio_chip *gpio;
	struct resource *res;
	int ret;

	pdata = dev_get_platdata(&pdev->dev);
	if (!pdata) {
		dev_err(dev, "no platform data\n");
		return -ENXIO;
	}

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

	platform_set_drvdata(pdev, mod);
	spin_lock_init(&mod->lock);

	/* get access to the MODULbus registers for this module */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	mod->regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(mod->regs))
		return PTR_ERR(mod->regs);

	ttl_setup_device(mod);

	/* Initialize the GPIO data structures */
	gpio = &mod->gpio;
	gpio->parent = &pdev->dev;
	gpio->label = pdev->name;
	gpio->get = ttl_get_value;
	gpio->set = ttl_set_value;
	gpio->owner = THIS_MODULE;

	/* request dynamic allocation */
	gpio->base = -1;
	gpio->ngpio = 20;

	ret = devm_gpiochip_add_data(dev, gpio, NULL);
	if (ret) {
		dev_err(dev, "unable to add GPIO chip\n");
		return ret;
	}

	return 0;
}

Example #2

File: gpio-janz-ttl.c Project: kozmikkick/eternityprj-kernel-endeavoru-128

static int __devinit ttl_probe(struct platform_device *pdev)
{
	struct janz_platform_data *pdata;
	struct device *dev = &pdev->dev;
	struct ttl_module *mod;
	struct gpio_chip *gpio;
	struct resource *res;
	int ret;

	pdata = pdev->dev.platform_data;
	if (!pdata) {
		dev_err(dev, "no platform data\n");
		ret = -ENXIO;
		goto out_return;
	}

	mod = kzalloc(sizeof(*mod), GFP_KERNEL);
	if (!mod) {
		dev_err(dev, "unable to allocate private data\n");
		ret = -ENOMEM;
		goto out_return;
	}

	platform_set_drvdata(pdev, mod);
	spin_lock_init(&mod->lock);

	/* get access to the MODULbus registers for this module */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "MODULbus registers not found\n");
		ret = -ENODEV;
		goto out_free_mod;
	}

	mod->regs = ioremap(res->start, resource_size(res));
	if (!mod->regs) {
		dev_err(dev, "MODULbus registers not ioremap\n");
		ret = -ENOMEM;
		goto out_free_mod;
	}

	ttl_setup_device(mod);

	/* Initialize the GPIO data structures */
	gpio = &mod->gpio;
	gpio->dev = &pdev->dev;
	gpio->label = pdev->name;
	gpio->get = ttl_get_value;
	gpio->set = ttl_set_value;
	gpio->owner = THIS_MODULE;

	/* request dynamic allocation */
	gpio->base = -1;
	gpio->ngpio = 20;

	ret = gpiochip_add(gpio);
	if (ret) {
		dev_err(dev, "unable to add GPIO chip\n");
		goto out_iounmap_regs;
	}

	return 0;

out_iounmap_regs:
	iounmap(mod->regs);
out_free_mod:
	kfree(mod);
out_return:
	return ret;
}