static int sc27xx_efuse_probe()

in sc27xx-efuse.c [203:258]

• 48 lines of code
• 7 McCabe index (conditional complexity)

static int sc27xx_efuse_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct nvmem_config econfig = { };
	struct nvmem_device *nvmem;
	struct sc27xx_efuse *efuse;
	int ret;

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

	efuse->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!efuse->regmap) {
		dev_err(&pdev->dev, "failed to get efuse regmap\n");
		return -ENODEV;
	}

	ret = of_property_read_u32(np, "reg", &efuse->base);
	if (ret) {
		dev_err(&pdev->dev, "failed to get efuse base address\n");
		return ret;
	}

	ret = of_hwspin_lock_get_id(np, 0);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to get hwspinlock id\n");
		return ret;
	}

	efuse->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, ret);
	if (!efuse->hwlock) {
		dev_err(&pdev->dev, "failed to request hwspinlock\n");
		return -ENXIO;
	}

	mutex_init(&efuse->mutex);
	efuse->dev = &pdev->dev;
	efuse->var_data = of_device_get_match_data(&pdev->dev);

	econfig.stride = 1;
	econfig.word_size = 1;
	econfig.read_only = true;
	econfig.name = "sc27xx-efuse";
	econfig.size = SC27XX_EFUSE_BLOCK_MAX * SC27XX_EFUSE_BLOCK_WIDTH;
	econfig.reg_read = sc27xx_efuse_read;
	econfig.priv = efuse;
	econfig.dev = &pdev->dev;
	nvmem = devm_nvmem_register(&pdev->dev, &econfig);
	if (IS_ERR(nvmem)) {
		dev_err(&pdev->dev, "failed to register nvmem config\n");
		return PTR_ERR(nvmem);
	}

	return 0;
}