static int omap_device_build_from_dt()

in mach-omap2/omap_device.c [128:208]

• 66 lines of code
• 17 McCabe index (conditional complexity)

static int omap_device_build_from_dt(struct platform_device *pdev)
{
	struct omap_hwmod **hwmods;
	struct omap_device *od;
	struct omap_hwmod *oh;
	struct device_node *node = pdev->dev.of_node;
	struct resource res;
	const char *oh_name;
	int oh_cnt, i, ret = 0;
	bool device_active = false, skip_pm_domain = false;

	oh_cnt = of_property_count_strings(node, "ti,hwmods");
	if (oh_cnt <= 0) {
		dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n");
		return -ENODEV;
	}

	/* SDMA still needs special handling for omap_device_build() */
	ret = of_property_read_string_index(node, "ti,hwmods", 0, &oh_name);
	if (!ret && (!strncmp("dma_system", oh_name, 10) ||
		     !strncmp("dma", oh_name, 3)))
		skip_pm_domain = true;

	/* Use ti-sysc driver instead of omap_device? */
	if (!skip_pm_domain &&
	    !omap_hwmod_parse_module_range(NULL, node, &res))
		return -ENODEV;

	hwmods = kcalloc(oh_cnt, sizeof(struct omap_hwmod *), GFP_KERNEL);
	if (!hwmods) {
		ret = -ENOMEM;
		goto odbfd_exit;
	}

	for (i = 0; i < oh_cnt; i++) {
		of_property_read_string_index(node, "ti,hwmods", i, &oh_name);
		oh = omap_hwmod_lookup(oh_name);
		if (!oh) {
			dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n",
				oh_name);
			ret = -EINVAL;
			goto odbfd_exit1;
		}
		hwmods[i] = oh;
		if (oh->flags & HWMOD_INIT_NO_IDLE)
			device_active = true;
	}

	od = omap_device_alloc(pdev, hwmods, oh_cnt);
	if (IS_ERR(od)) {
		dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
			oh_name);
		ret = PTR_ERR(od);
		goto odbfd_exit1;
	}

	/* Fix up missing resource names */
	for (i = 0; i < pdev->num_resources; i++) {
		struct resource *r = &pdev->resource[i];

		if (r->name == NULL)
			r->name = dev_name(&pdev->dev);
	}

	if (!skip_pm_domain) {
		dev_pm_domain_set(&pdev->dev, &omap_device_pm_domain);
		if (device_active) {
			omap_device_enable(pdev);
			pm_runtime_set_active(&pdev->dev);
		}
	}

odbfd_exit1:
	kfree(hwmods);
odbfd_exit:
	/* if data/we are at fault.. load up a fail handler */
	if (ret)
		dev_pm_domain_set(&pdev->dev, &omap_device_fail_pm_domain);

	return ret;
}